NATURALLY OCCURRING PRODUCTS IN CANCER THERAPY

Rajesh, Leena S. Sankari, L. Malathi, and Jayasri R. Krupaa

Author information Article notes Copyright and License information Disclaimer

This article has been cited by other articles in PMC.

Abstract

Natural products have been used for the treatment of various diseases and are becoming an important research area for drug discovery. These products, especially phytochemicals have been extensively studies and have exhibited anti-carcinogenic activities by interfering with the initiation, development and progression of cancer through the modulation of various mechanisms including cellular proliferation, differentiation, apoptosis, angiogenesis, and metastasis. This concept is gaining attention because it is a cost-effective alternative to cancer treatment. In this article, we have discussed some of the naturally occurring products used in cancer treatment.

KEY WORDS: Carcinogenesis, curcumin, quercetin

Oral cancer is defined as the cancer of mouth and pharynx including cancer of lips, tongue, floor of the mouth, palate, gingiva, alveolar mucosa, buccal mucosa, oropharynx, tonsils, uvula and salivary glands. Cancer is the biggest cause of mortality worldwide, responsible for 8.2 million death/year and rising according to the global scientific report released on the February 5, 2014.[1] Factors such as obesity, poor diet, tobacco, radiation, environmental pollutants, lack of physical activity and age increases cancer risk. These factors may cause cancer by damaging genes directly and/or indirectly in combination with existing genetic mutation within cells.[2]

Epidemiology

Epidemiological studies have shown that diet containing fruits and vegetables reduce the risk of several types of cancer.[3] Intake of fruits and vegetables has been successfully used in the prevention of chronic disease associated with oxidative stress condition including cancer.[4,5] WHO projects 10,000,000 cases of cancer per year worldwide and 6,000,000 deaths from cancer per year worldwide. And it also projected 15 million cases/year in 2020. It is been estimated that 80% of the world population relies on plant-based medicine for primary health care and 75% of all pharmaceuticals were discovered by examining the use of plants in traditional medicine.

Carcinogenesis

The transformation of normal cell to cancer cell occurs through three distinct phases, initiation, promotion, and progression. Initiation of cancer occurs in the normal cells due to exposure of carcinogenic and mutagenic agents. The initiated cells are irreversibly altered and are at greater risk of neoplastic transformation. However, initiation alone is not sufficient for tumor formation.[6] In promotion phase, tumor promoters convert the initiated cells into neoplastic cells.[7,8] Progression involves a stepwise evolution of neoplastic cells into higher degree of malignancy.

Chemopreventive Agents in Oral Carcinogenesis

Various phytochemicals obtained from vegetables, fruits, spices, teas, herbs, and medicinal plants, such as flavonoids carotenoids, phenolic compounds and terpenoids, have been extensively investigated for their anti-cancer activities due to their safety, low toxicity and general availability.[9] In this article we discuss (a) use of phytochemicals, including curcumin, resveratrol, apigenin, quercetin, genistein, lycopene, isothiocyanates (b) their mechanism of action, such as anti-oxidant properties, inhibition of cell cycle, induction of apoptosis, regulation of angiogenesis.

Curcumin

Curcumin (diferuloylmethane), a yellow pigment belongs to the class of polyphenols present in the rhizomes of turmeric is used in cooking in India. It is also used as a cosmetic and in some medical preparations. Multiple therapeutic activities of curcumin have also been considered to be associated with its anti-oxidant and anti-inflammatory properties. The anti-inflammatory effect of curcumin is most likely medicated through its ability to inhibit cyclooxygenase-2, lipoxygenase (LOX), and inducible nitric oxide synthase.[10] Curcumin has the capability to inhibit carcinogen bioactivation via suppression of specific cytochrome P450 isozymes, as well as to induce the activity or expression of phase II carcinogen detoxifyingenzymes.[11] Combination of phenethylisothiocyanate and curcumin caused suppression of epidermal growth factor (EGF) receptor phosphorylation and inhibition of EGF-induced phosphorylation and induction of phosphatidylinositol 3-kinase in prostate cancer-3 cells.[12] It regulates tumor cell growth through multiple cell signaling pathways, including cell proliferation pathway, cell survival pathway, caspase activation pathway, tumor suppressor pathway, death receptor pathway, mitochondrial pathways and protein kinase pathway.

Resveratrol

Resveratrol (trans-3, 5, 4-tryhydroxystilbene) a naturally occurring phytoalexin, is found at a high concentration in the skin of red grapes and red wine. Resveratrol is known to have anti-oxidant, anti-inflammatory and antiproliferative effects on a variety of cancer cells in vitro and in various animal models.[13] Resveratrol has been identified as an effective candidate for cancer prevention based on inhibitory effects on cellular events associated with cancer initiation, promotion, and progression.[14] It has been shown to inhibit tumor necrosis factor-α-mediated matrix metalloproteinase-9 expression in HepG2 cells by down regulation of the nuclear factor-kB signaling pathway.[15] Various studies revealed multiple intracellular targets of resveratrol, which affect cell growth, inflammation, apoptosis, angiogenesis, and invasion and metastasis.[16]

Apigenin

Apigenin, a naturally occurring plant flavone, abundantly present in common fruits and vegetables possesses anti-oxidant, anti-mutagenic, anti-carcinogenic, anti-inflammatory, anti-growth, and anti-progression properties.[17] Apigenin is effective in carcinogenesis, topical application of apigenin inhibited dimethyl benzanthracene-induced skin tumors,[18] and also diminished ultraviolet-induced cancer incidence and increased tumor free survival experiment.[19]

Earlier studies demonstrated that the apigenin promotes metal chelation, scavenges free radicals and stimulates phase II detoxification enzymes in cell culture and in vivo tumor models.[20]

Quercetin

Quercetin is a dietary flavonoid abundant in variety of foods including apples, berries, brassica vegetables, grapes, onions, shallots, tea, and tomatoes as well as many seeds, nuts, barks and leaves.[21] It usually occurs as o-glycosides with D-glucose as glycosides have been identified.[22] Among polyphenols, quercetin is one of the most potent anti-oxidants, as demonstrated in different studies.[23,24] It has been shown to inhibit oxidative species generating enzymes such as xanthine oxidase, LOX, and nicotinamide adenine dinucleotide phosphate oxidase.[25] It is a potent anti-cancer agent, exhibiting different activities such as cell cycle regulation, interaction with type II estrogen binding sites and tyrosine kinase inhibition.[26]

Isothicyanates

Isothiocyanates (ITCs) are electrophilic compounds that play a major role in potential chemopreventive effects associated with high intake of cruciferous vegetables such as watercress, brussel sprouts, broccoli, cabbage, horseradish, radish, and turnip.[27] Cruciferous vegetables have been widely accepted as potential diet components that may decrease the risk of cancer.[28] Epidemiological studies show that the dietary intake of ITCs I associated with reduced risk of certain human cancers.[29] ITCS display anti-carcinogenic activity by reducing the activation of carcinogens and increase their detoxification.

Genistein and ursolic acid

Genistein is an isoflavone compound found in soybean and related products such as tofu, soy milk and soy sauce.[30] And is a promising cancer chemotherapeutic agent.[31] It inhibits the growth of cancer by increasing apoptosis, including cell cycle delays and modulating intercellular signaling pathways.[32]

Ursolic acid is a pentacyclic triterpene compound widely found in food, medicinal herbs, apple peel and is able to exhibit a wide range of pharmacological functions, including anti-oxidant, anti-tumor, anti-inflammatory activities.[33]

Conclusion

Natural products play a major role in chemotherapy drugs, and primarily target proliferating tumor cells. Chemoprevention by phytochemicals is of great interest and is considered to be an inexpensive, readily applicable, acceptable, and accessible approach to cancer control and management. Several phytochemicals are in preclinical or clinical trials for cancer chemoprevention. Epidemiological studies have shown that high dietary consumption of vegetables and fruits reduced the risk of cancer. Severe toxicity is a major drawback in conventional radiotherapy and chemotherapy.

Footnotes

Source of Support: Nil

Conflict of Interest: None declared.

Go to:

References

  1. Cancer Report worldwide. Press Release WCD 2014, Crisis of Cancer Impact Worldwide. 2014
  2. Anand P, Kunnumakkara AB, Sundaram C, Harikumar KB, Tharakan ST, Lai OS, et al. Cancer is a preventable disease that requires major lifestyle changes. Pharm Res. 2008;25:2097–116. [PMC free article] [PubMed]
  3. Donaldron MS. Nutrition and cancer. A review of the evidence for an anticancer diet. Nutrition journal. 2004;3:1–21.
  4. Riboli E, Norat T. Epidemiological evidence of the protective effect of fruit and vegetables on cancer risk. Am J Clin Nutr. 2003;78(3 suppl):559–69s. [PubMed]
  5. Nichenametla SN, Taruscio TG, Barney DL, Exon JH. A review of the effects and mechanisms of polyphenolics in cancer. Crit Rev Food Sci Nutr. 2006;46:161–83. [PubMed]
  6. Hollman PC, Katan MB. Dietary flavonoids: Intake, health effects and bioavailability. Food Chem Toxicol. 1999;37:937–42. [PubMed]
  7. Di Carlo G, Mascolo N, Izzo AA, Capasso F. Flavonoids: Old and new aspects of a class of natural therapeutic drugs. Life Sci. 1999;65:337–53. [PubMed]
  8. Cragg GM, Newman DJ. Maryland: National Cancer Institute; 2007. Natural products branch. Developmental therapeutics program, Division of cancer, treatment and diagnosis; pp. 461–77.
  9. Amin AR, Kucuk O, Khuri FR, Shin DM. Perspectives for cancer prevention with natural compounds. J Clin Oncol. 2009;27:2712–25. [PMC free article] [PubMed]
  10. Menon VP, Sudheer AR. Antioxidant and anti-inflammatory properties of curcumin. In: Aggarwal BB, Surh YJ, Shishodia S, editors. The Molecular Targets and Therapeutic Uses of Urcumin in Health and Disease. US, Texas: Springer; 2007. pp. 105–25.
  11. Surh YJ, Chun KS. Cancer chemopreventive effects of curcumin. In: Aggarwal BB, Surh YJ, Shishodia S, editors. The Molecular Targets and Therapeutic Uses of Urcumin in Health and Disease. London: Springer; 2007. pp. 149–72.
  12. Kim JH, Xu C, Keum YS, Reddy B, Conney A, Kong AN. Inhibition of EGFR signaling in human prostate cancer PC-3 cells by combination treatment with beta-phenylethyl isothiocyanate and curcumin. Carcinogenesis. 2006;27:475–82. [PubMed]
  13. Gagliano N, Aldini G, Colombo G, Rossi R, Colombo R, Gioia M, et al. The potential of resveratrol against human gliomas. Anticancer Drugs. 2010;21:140–50. [PubMed]
  14. Huang X, Zhu HL. Resveratrol and its analogues: Promising antitumor agents. Anticancer Agents Med Chem. 2011;11:479–90. [PubMed]
  15. Yu HB, Pan CE, Wu WJ, Zhao SH, Zhang HF. Effects of resveratrol on matrix metalloproteinase-9 expression in hepatoma cells. Zhong Xi Yi Jie He Xue Bao. 2008;6:270–3. [PubMed]
  16. Athar M, Back JH, Kopelovich L, Bickers DR, Kim AL. Multiple molecular targets of resveratrol: Anti-carcinogenic mechanisms. Arch Biochem Biophys. 2009;486:95–102. [PMC free article] [PubMed]
  17. Patel D, Shukla S, Gupta S. Apigenin and cancer chemoprevention: Progress, potential and promise (review) Int J Oncol. 2007;30:233–45. [PubMed]
  18. Wei H, Tye L, Bresnick E, Birt DF. Inhibitory effect of apigenin, a plant flavonoid, on epidermal ornithine decarboxylase and skin tumor promotion in mice. Cancer Res. 1990;50:499–502. [PubMed]
  19. Birt DF, Mitchell D, Gold B, Pour P, Pinch HC. Inhibition of ultraviolet light induced skin carcinogenesis in SKH-1 mice by apigenin, a plant flavonoid. Anticancer Res. 1997;17:85–91. [PubMed]
  20. Middleton E, Jr, Kandaswami C, Theoharides TC. The effects of plant flavonoids on mammalian cells: Implications for inflammation, heart disease, and cancer. Pharmacol Rev. 2000;52:673–751. [PubMed]
  21. Kelly GS. Quercetin. Monograph. Altern Med Rev. 2011;16:172–94. [PubMed]
  22. Yang CS, Landau JM, Huang MT, Newmark HL. Inhibition of carcinogenesis by dietary polyphenolic compounds. Annu Rev Nutr. 2001;21:381–406. [PubMed]
  23. Bors W, Heller W, Michel C, Saran M. Flavonoids as antioxidants: Determination of radical-scavenging efficiencies. Methods Enzymol. 1990;186:343–55. [PubMed]
  24. Prior RL. Fruits and vegetables in the prevention of cellular oxidative damage. Am J Clin Nutr. 2003;78:570–8S. [PubMed]
  25. Day AJ, Bao Y, Morgan MR, Williamson G. Conjugation position of quercetin glucuronides and effect on biological activity. Free Radic Biol Med. 2000;29:1234–43. [PubMed]
  26. Lamson DW, Brignall MS. Antioxidants and cancer, part 3: Quercetin. Altern Med Rev. 2000;5:196–208. [PubMed]
  27. Cavell BE, Alwi SS, Donlevy A, Packham G. Antiangiogenic effects of dietary isothiocyanates; mechanisms of action and implications for human health. Biochem Pharmacol. 2010;81:327–36. [PubMed]
  28. Lam TK, Gallicchio L, Lindsley K, Shiels M, Hammond E, Tao XG, et al. Cruciferous vegetable consumption and lung cancer risk: A systematic review. Cancer Epidemiol Biomarkers Prev. 2009;18:184–95. [PMC free article] [PubMed]
  29. Mi L, Di Pasqua AJ, Chung FL. Proteins as binding targets of isothiocyanates in cancer prevention. Carcinogenesis. 2011;32:1405–13. [PMC free article] [PubMed]
  30. Fotsis T, Pepper M, Adlercreutz H, Hase T, Montesano R, Schweigerer L. Genistein, a dietary ingested isoflavonoid, inhibits cell proliferation and in vitro angiogenesis. J Nutr. 1995;125:790–7S. [PubMed]
  31. Li W, Frame LT, Hirsch S, Cobos E. Genistein and hematological malignancies. Cancer Lett. 2010;296:1–8. [PubMed]
  32. Barnes S. Effect of genistein on in vitro and in vitro models of cancer. J Nutr. 1995;125(3 Suppl):777–83S. [PubMed]
  33. Mizushina Y, Iida A, Ohta K, Sugawara F, Sakaguchi K. Novel triterpenoids inhibit both DNA polymerase and DNA topoisomerase. Biochem J. 2000;350:757–63. [PMC free article] [PubMed]

 

THIS NEW, FDA-APPROVED SKIN CARE DRUG COULD HELP OVER 7.5 MILLION PEOPLE

Julie Ricevuto , Digital Beauty Editor | November 12, 2018

Photo Credits: pumatokoh/Shutterstock/Model Is Used for Illustrative Purposes Only

Alleviating psoriasis symptoms has been a difficult feat to achieve for decades, but with new advances in the skin care industry, doctors are excited that a cure may be closer than ever before. While we still haven’t reached a final remedy yet, a new advancement in the treatment of psoriasis has people super excited. Bryhali Lotion 0.01% is a new topical treatment that uses an active ingredient called halobetasol to treat the condition. And as Allure reports, Bryhali Lotion has just been approved by the Food and Drug Administration, making doctors and patients alike excited to give the new medication a try.

The treatment, which is a “super-potent corticosteroid,” is used on affected skin and is attained through a prescription. It works to calm the inflamed skin caused by plaque psoriasis—the most common form of psoriasis—which often presents itself as dry, raised, red skin lesions covered with silvery scales.

You May Also Like: An Injection to Erase Cellulite Might Be Coming Very Soon

Unlike other psoriasis medications, Bryhali Lotion is proven to be safe for a longer time period (8 weeks!) than its competitors. Most psoriasis drugs are only considered safe for a two week period because they’ve been proved to thin the skin with additional use, however, this didn’t happen to users in clinical trials that tested Bryhali Lotion for the full eight weeks.

“Bryhali Lotion will help address an unmet need for many plaque psoriasis patients,” said Lawrence J. Green, M.D., a lead investigator on the Bryhali Lotion Phase 3 studies and associate clinical professor of Dermatology at George Washington University School of Medicine, in a press release. “Topical steroids are the most frequently used treatment for psoriasis, but come with an increased risk of adverse events and a duration of use limited to two to four weeks. With Bryhali Lotion, I’m excited to offer my patients a topical steroid option that can be used for up to eight weeks without sacrificing tolerability, and with proven efficacy.”

Possible side effects of the treatment include burning, stinging, itching and dryness at the application site, so be sure to talk to your doctor if you experience any of these symptoms when using the product. Regardless of these side effects, we can’t help but be excited about Bryhali Lotion’s FDA approval. Considering psoriasis affects 7.5 million people, it’s possible this could make a big difference in a lot of lives.

https://www.newbeauty.com/blog/dailybeauty/12564-bryhali-lotion-psoriasis-treatment-fda-approval/

ARGENTUM PHARMACEUTICALS WINS PATENT INVALIDATION TRIAL AGAINST THE SOLE REMAINING PATENT PROTECTING JANSSEN’S ZYTIGA

By Mike Botta

https://www.rdmag.com/news/2018/01/j-j-loses-zytiga-patent-protection-ruling-argentum-challenge

Argentum Pharmaceuticals wins patent invalidation trial against the sole remaining patent protecting Janssen’s Zytiga.

The U.S. Patent & Trademark Office (PTO) issued a final written decision Wednesday in Argentum Pharmaceuticals LLC’s inter partes review (IPR) against the sole unexpired patent covering Janssen Oncology, Inc.’s Zytiga (abiraterone acetate). Janssen Oncology is a subsidiary of Johnson & Johnson.

Johnson & Johnson said it is evaluating its options concerning a possible rehearing request or appeal, according to a company statement.

Argentum had challenged all claims (1−20) of Janssen’s U.S. Patent No. 8,822,438, which the FDA’s Orange Book states will expire in August 24, 2027.

In the decision, the PTO concluded that Argentum “satisfied its burden of demonstrating, by a preponderance of the evidence, that the subject matter of claims 1–20 would have been obvious,” and therefore ordered “that claims 1-20 are held unpatentable.

“The inter partes review process is an important tool by which generic and biosimilar companies can create prescription drug savings by ensuring that non-innovative patents do not block competition,” Argentum’s CEO Jeffrey Gardner said following the decision. “Argentum’s core mission is to lower the cost of prescription drugs by challenging patents that are not innovative and which artificially support high drug prices.”

Johnson & Johnson, meanwhile, issued the following statement: “We are disappointed in and strongly disagree with the U.S. Patent and Trademark Office’s (USPTO) decisions relating to Zytiga as part of the inter partes reviews. We are evaluating our options with respect to a request for rehearing and/or appeal to the Court of Appeals for the Federal Circuit. We believe the ‘438 patent is valid and will continue to vigorously defend it.”

But, Argentum’s Gardner expressed confidence that, if appealed, the decision would be upheld: “We believe that the PTO’s decision will be upheld if appealed by Janssen, and will save the U.S. healthcare system billions of dollars over the next decade. Those savings will inure to the benefit of American patients by improving their access to the high quality, safe, and effective FDA-approved generic alternatives that they deserve.”

Zytiga is used along with prednisone to treat men with prostate cancer that is resistant to medical or surgical treatments and that has spread to other parts of the body.

NEW IMMUNOTHERAPY TECHNIQUE CAN SPECIFICALLY TARGET TUMOR CELLS, UCI STUDY REPORTS

“Lab on a chip” technology can be used to create individualized treatments for cancer

November 6, 2018

“This technology is particularly exciting because it dismantles major challenges in cancer treatments,” Weian Zhao says. Steve Zylius / UCI

Irvine, Calif., Nov. 6, 2018 — A new immunotherapy screening prototype developed by University of California, Irvine researchers can quickly create individualized cancer treatments that will allow physicians to effectively target tumors without the side effects of standard cancer drugs.

UCI’s Weian Zhao and Nobel laureate David Baltimore with Caltech led the research team that developed a tracking and screening system that identifies T cell receptors with 100-percent specificity for individual tumors within just a few days. Research findings appear in Lab on a Chip. (Link to study: https://pubs.rsc.org/en/content/articlepdf/2018/lc/c8lc00818c?page=search)

In the human immune system, T cells have molecules on their surfaces that bind to antigens on the surface of foreign or cancer cells. To treat a tumor with T cell therapy, researchers must identify exactly which receptor molecules work against a specific tumor’s antigens. UCI researchers have sped up that identification process.

“This technology is particularly exciting because it dismantles major challenges in cancer treatments,” said Zhao, an associate professor of pharmaceutical sciences who is affiliated with the Chao Family Comprehensive Center and the Sue & Bill Gross Stem Cell Research Center. “This use of droplet microfluidics screening significantly reduces the cost of making new cancer immunotherapies that are associated with less systemic side effects than standard chemotherapy drugs, and vastly speeds up the timeframe for treatment.”

Zhao added that traditional cancer treatments have offered a one-size-fits-all disease response, such as chemotherapy drugs which can involve systemic and serious side effects.

T cell receptor (TCR)-engineered T cell therapy, a newer technology, harnesses the patient’s own immune system to attack tumors. On the surface of cancer cells are antigens, protruding molecules that are recognized by the body’s immune system T cells. This new therapy places engineered molecules on the patient’s T cells which will bind to their cancer cell antigens, allowing the T cell to destroy the cancer cell. TCR therapy can be individualized, so each patient can have T cells designed specifically for their tumor cells.

This antigen-TCR recognition system is very specific – there can be hundreds of millions of different types of TCR molecules. A big challenge for TCR-T cell therapy development remains in identifying particular TCR molecules out of a pool of millions of possibilities. Finding a match can take up to a year (time many cancer patients don’t have) and can cost half a million dollars or more per treatment.

By using miniscule oil-water droplets, Zhao’s team designed a device that allows for individual T cells to join with cancer cells in microscopic fluid containers. The TCRs that bind with the cancer cells’ antigens can be sorted and identified within days, considerably faster than the months or year that previous technologies required. The technology also significantly reduces the cost of making individualized TCRs and accelerates the pipeline of TCR-T cell therapy to clinic.

Through a partnership with Amberstone Biosciences, a UCI start-up, this entire platform and screening process will be available to pharmaceutical companies for drug development within just a few months. Not only can this technology help revolutionize TCR-T cell therapies for cancer, but it will also be a powerful tool for discovering other immunological agents, including antibodies and CAR-T cells, and for elucidating new immunology and cancer biology at a depth not possible before.

Aude I. Segaliny, Lingshun Kong, Ci Ren, and Xiaoming Chen of UCI contributed to this work, in addition to Guideng Li, Jessica K. Wang and Guikai Wu. This work was supported by UCI Applied Innovation, the Chao Family Comprehensive Cancer Center, the Sue & Bill Gross Stem Cell Research Center and the Department of Pharmaceutical Sciences. The work was funded by National Institutes of Health (grants 1DP2CA195763 and R21CA219225) and Amberstone Biosciences LLC: No. AB-208317.

About the University of California, Irvine: Founded in 1965, UCI is the youngest member of the prestigious Association of American Universities. The campus has produced three Nobel laureates and is known for its academic achievement, premier research, innovation and anteater mascot. Led by Chancellor Howard Gillman, UCI has more than 30,000 students and offers 192 degree programs. It’s located in one of the world’s safest and most economically vibrant communities and is Orange County’s second-largest employer, contributing $5 billion annually to the local economy. For more on UCI, visit www.uci.edu.

Media access: Radio programs/stations may, for a fee, use an on-campus ISDN line to interview UCI faculty and experts, subject to availability and university approval. For more UCI news, visit news.uci.edu. Additional resources for journalists may be found at communications.uci.edu/for-journalists.

ARE BOTANICAL DRUGS THE “NEXT BIG THING” IN PHARMACEUTICALS?

By Daniel Dupuis

BOTANICAL DRUGS OFFER THE BEST OF BOTH WORLDS

Almost all new drug development is on a quest to deliver maximum efficacy, while being not only safe, but well tolerated due to exhibiting few side effects. Anyone that has brought a prescription home from the pharmacy or listened to the warnings listed at the conclusion of any drug advertisement on television realizes that all conventional drugs have a long list of warnings about the dangers and side effects that are inherent to all medications.

Botanical drugs, however, offer the promise of comparable efficacy, but with little or no side effects, while exhibiting negligible safety risks. It is a sector that is no longer in its infancy and has become part of the research and development activity for most large pharmaceutical companies, as well as a number of smaller entities with a long history in this arena.

GROWTH WITHIN THE BOTANICAL DRUG MARKET

The botanical market in the United States has been stalled for a number of reasons in the United States, but recent regulatory changes and the growth of the immuno-therapy sector are attracting immense interest from all elements of the pharmaceutical and biotech industry.

The already exploding global market for botanicals and plant-derived drugs will grow from $29.4 billion in 2017 to around $39.6 billion by 2022 for an anticipated compound annual growth of just under 7%, however, the botanical sector alone has a projected growth rate of 49.5%. Much of this growth will be driven by the United States market, as botanicals have only recently gained a foothold in the United States over the last several years, while being a long-accepted component of health care in both Asia and Europe.

While the scientific world can sometimes ignore business projections, innovation is driven by capital investment and a confluence of factors has dictated that botanicals will be an area of concentration within the drug industry over the next decade.

WHAT IS A BOTANICAL DRUG?

Per the FDA, a botanical drug goes through many of the same rigors as a conventional drug.

Unlike a dietary supplement that can make no disease-based claims, a botanical drug product is intended for use in the diagnosis, cure, mitigation, treatment or prevention of disease in humans.

  • A botanical drug product consists of vegetable materials, which may include plant materials, algae, macroscopic fungi, or combinations thereof.
  • A botanical drug product may be available as (but not limited to) a solution (e.g., tea), powder, tablet, capsule, elixir, topical, or injection.
  • Botanical drug products often have unique features, for example, complex mixtures, lack of a distinct active ingredient, and substantial prior human use. Fermentation products and highly purified or chemically modified botanical substances are not considered botanical drug products.

There is nothing new about medications that are derived from plant-based sources. While Bayer introduced aspirin in 1899, it was synthesized from willow bark and its use was found in the writings of Hippocrates in 400 BC. A major component of Alexander Fleming accidentally inventing penicillin was the mold that grew on a plate of cheese that was on the top of a stack of dirty dishes that were left in the sink.

WHY NOW?

 The main drivers of growth include increasing population, rising awareness towards botanical and plant-derived drugs and the increasing prevalence of chronic diseases.  Most botanical drugs have a favorable side effect profile and present few safety risks, but many in the United States have questioned the efficacy claims of botanicals.

As botanical research has evolved, they have now been the subject of numerous clinical trials and have demonstrated efficacy that is comparable to traditional drugs.

The United States has lagged behind the rest of the world in the development of botanical therapies, mainly because of a lack of regulatory guidelines. The problems are largely due to the semantics employed by the FDA. For example, Germany has over 70 commonly prescribed therapies that are not recognized in the U.S. for no other reason than they fell into what was, until recently, a “gray” area within the FDA. While the majority of countries do not see a distinction between botanicals, plant derived or synthesized drugs, the United States did not even create a botanical category until 2004. The FDA, however, amended the botanical guidelines in 2016 in a manner that is much more favorable to their development.

ONCOLOGY IS THE MAIN AREA OF CONCENTRATION

While “Big Pharma” was slow to enter the botanical market, they are now actively involved (Sanofi alone has 12 different botanicals under development). While doing some in-house research, many large pharmaceutical companies augmented their development strategy by licensing formulations from smaller companies, or simply acquiring them, in addition to partnering with foreign-based entities that have documented success in this sector.

This confluence of foreign entities, academic research, large pharmaceutical companies and research and development from smaller companies that have pioneered this field has led to an explosion of submissions to the FDA.

As of 2016, more than 600 botanical applications were in various phases of development with the FDA.

There are a number of disease states that are currently targeted for treatment by botanicals, but oncology is a clear area of concentration, with cancer research being the sector that has the highest number of active FDA filings.

In fact, over one third of all applications are for cancer treatment, while no other disease state exceeds 10% (see table). This is not surprising as the immuno-oncology sector has been the most robust among all drug development initiatives over the last several years from both an active research and investment perspective. Consider that Keytruda, which can only be administered to populations that have a unique genetic expression, has been projected to be the third-best-selling prescription in the world within the next five years with global sales of over $12 billion.

The promise of immuno-oncology is comparable, or enhanced, efficacy, with significantly reduced side effects. Botanicals, however, have an inherent advantage to deliver on that promise due to their lack of toxicity.

The leap from “traditional” drugs to botanicals in the oncology sector is not as considerable as some might imagine. Two of the first, and most commonly prescribed medications for a variety of cancers, are paclitaxel and docetaxel. Paclitaxel (Taxol) was derived from an extract from the bark of the rare Pacific yew tree. Due to the scarcity and difficulty of formulating paclitaxel, scientists developed docetaxel (Taxotere), which is synthesized from the renewable and more readily available leaves of the European yew tree.

ONCOLOGY IS THE DISEASE STATE WITH THE HIGHEST NUMBER OF PENDING BOTANICAL APPLICATIONS

The following is a small sample of some of the companies in various stages of botanical drug development:                                               

 Omnitura Has Developed a Botanical Immuno-Oncology Drug 

Omnitura is a company that was an early entrant into the botanical drug sector and is further along than many of the relatively new entrants into the field. They utilized a PDX model (implanting human tumors into mice with no immune system) to develop Aneustat, their lead drug candidate, which is a multifunctional, multitarget, systems biology platform that is their first submission to the FDA for prostate cancer.. It has been shown in studies to both kill, and inhibit the growth, of cancer cells as either a stand-along medication or as a companion to many current standard of care cancer medications. In addition to prostate cancer, Aneustat is currently in phase II development for a wide array of cancers, including, lung, breast, pancreatic, liver and colon.

The fact that Aneustat has been shown to be effective as a stand-alone therapy is a rare trait, even when compared to the many new medications being developed within the “traditional” drug sector. Many of the new immuno-therapy drugs are meant to enhance the efficacy or limit the side effects as a component of a combination therapy, but few have demonstrated effectiveness in killing cancer cells as a stand-alone medication.

Yiviva Publishes Clinical Trial for Cancer Drug

Yale biotech startup Yiviva was recently awarded an Innovation Award at the U.S. China Health Summit. Yiviva is developing therapeutics, inspired by botanical medicines, to treat chronic diseases and cancer.

Yiviva’s lead candidate cancer drug, PHY906, is based on an 1800-year old traditional

Chinese medicine formula.

In clinical studies targeting liver, colorectal and pancreatic cancer, PHY906 has been shown to increase the safety and efficacy for a broad spectrum of cancer treatments. In a Phase I/II hepatocellular carcinoma study at Yale, Stanford and City of Hope, data suggests that PHY906 may significantly reduce gastrointestinal side-effects and increase the survival rate for patients with Hepatitis B-associated liver cancer.

Axcella Targets Amino Acids For Multiple Disease States

Axcella is pioneering revolutionary new medicines with a focus on amino acid homeostasis. The company has discovered more than 2,000 diseases with amino acid imbalances and developed a systems pharmacology approach to restore health at the cellular level.

Axcella’s proprietary platform is clinically validated across several indication areas, with clinical-stage candidates in muscle, neurodegenerative and liver conditions.

Izun Pharmaceuticals Completes Phase II Trial

Izun Pharmaceuticals Corporation is a clinical-stage company focused on developing high efficacy products based on pharmaceutically active compounds derived from botanical sources. They have  announced that the results from a recently completed double-blind, Phase II clinical study for oral mucositis, indicated promising positive outcomes for the investigational product IZN-6N4.

The study was conducted at 12 centers in the United States and Israel. The trial enrolled a total of 110 patients with head and neck cancer who were scheduled to receive standard regimens of concomitant chemoradiation. Not only did patients treated with IZN-6N4 have less mouth and throat pain and soreness than controls, but more importantly, they were also more able to maintain their weights throughout the course of radiotherapy. The data supports that the best efficacy of IZN-6N4 was related to its initiation of use at the start of chemoradiation.

Dantonic is Shown to Prevent Chronic Stable Angina

T89, a 3-herb composition drug that improves microcirculation in and increases energy supply to the heart, and reduces blood viscosity in patients with chronic stable angina (A) and has been shown to improve clinical outcomes in comparison to current anti-anginal drug (CAAD), such as β-blockers, Ca++ channel blockers or nitrates that only targets on coronary arteries.

CONCLUSION

As some of the 600 applications become approved the medical community may learn to embrace medications that are not only effective, but safe and easy to take without troubling side effects. While botanicals have a long history, their use, especially in the United States, is truly the most forward looking direction that new drug development can undertake and offers patients the promise of new therapies that can help cure disease and dramatically improve their quality of life.

 

VITAMIN D AND FISH OIL SUPPLEMENTS MOSTLY DISAPPOINT IN LONG AWAITED RESEARCH RESULTS

 

 

 

By Patti Neighmond

Taking fish oil supplements to prevent cardiovascular disease and cancer may not be effective, a new study suggests.

Cathy Scola/Getty Images

Many people routinely take nutritional supplements such as vitamin D and fish oil in the hopes of staving off major killers like cancer and heart disease.

But the evidence about the possible benefits of the supplements has been mixed.

Now, long-awaited government-funded research has produced some of the clearest evidence yet about the usefulness of taking the supplements. And the results — published in two papers — are mostly disappointing.

“Both trials were negative,” says Dr. Lawrence Fine, chief of the clinical application and prevention branch of the National Heart, Lung, and Blood Institute, a part of the National Institutes of Health, which funded the studies.

“Overall, they showed that neither fish oil nor vitamin D actually lowered the incidence of heart disease or cancer,” Fine says.

The results were presented at the American Heart Association Scientific Sessions in Chicago and released online Saturday by The New England Journal of Medicine. One paper focused on vitamin D supplementation, and the other focused on fish oil.

The trials involved nearly 26,000 healthy adults age 50 and older with no history of cancer or heart disease who took part in the VITAL research project. Twenty percent of the participants were African-American.

Some of the participants took either 1 gram of fish oil — which contains omega-3 fatty acids — plus 2,000 international units of vitamin D daily. Others consumed the same dose of vitamin D plus a placebo, while others ingested the same dose of fish oil plus a placebo. The last group took two placebos. After more than five years, researchers were unable to find any overall benefit.

While the overall results were disappointing, there appeared to be a beneficial effect when it came to one aspect of heart disease and fish oil: heart attacks.

A secondary analysis showed taking fish oil lowered the risk of heart attack by about 28 percent, which is a “statistically significant” finding, says Dr. JoAnn Manson, who is chief of the division of preventive medicine at the Brigham and Women’s Hospital in Boston. She led the research.

Those who appeared to benefit the most were people who didn’t ordinarily eat much fish in their day-to-day diet, as well as African-Americans, Manson says.

African-Americans in the study experienced a 77 percent lower risk of heart attack compared with taking a placebo, which is a “dramatic reduction,” Manson says. Further research is needed to confirm these findings, she adds, but, “in the meantime, it would be reasonable for African-Americans to talk with their health care providers about whether they may be candidates for taking fish oil supplements.”

In an editorial also published in the New England Journal of Medicine, authors Dr. John F. Keaney and Dr. Clifford J. Rosen take issue with some of the analysis in the study and write that the positive findings about heart attacks and African-Americans and individuals who don’t eat much fish need to be interpreted with caution.

There were no serious side effects, such as bleeding, high blood calcium levels or gastrointestinal symptoms found with either supplement.

Manson and her colleagues plan to further analyze their data and look for possible links between vitamin D and fish oil and cognitive function, autoimmune disease, respiratory infections and depression. Earlier research suggests the supplements may have some benefit for these conditions.

In the meantime, NIH official Lawrence Fine says, don’t throw out your fish oil and vitamin D.

“At this point, if one is thinking about supplementation, either omega-3s or vitamin D, talking to your physician or health care provider is the next step,” Fine says.

Fine and Manson stressed that vitamin D and the omega-3 fatty acids found in fish oil are important nutrients, but that the best way to get them is as part of a well-balanced diet. That includes eating fatty fish like sardines, tuna and salmon, and vitamin D-fortified cereals, milk and orange juice.

Another study presented at the same meeting examined whether a substance derived from a component of fish oil, known as icosapent ethyl, might reduce adverse events among people who already have cardiovascular risk factors, such as hardening of the arteries, diabetes or high blood fats known as triglycerides.

Overall, that study found there was a 25 percent risk reduction for patients taking the extract. These patients were less likely to die from heart disease, have a heart attack or stroke, be hospitalized for chest pain or need procedures such as angioplasty, stenting or bypass surgery, researchers reported.

“We are reporting a remarkable degree of risk reduction,” says Dr. Deepak Bhatt, who headed the study and is a cardiologist at Brigham and Women’s Hospital.

The study, which was also a randomized clinical trial, tracked participants for an average of five years. The volunteers took icosapent ethyl, which is sold under the brand name Vascepa and was developed by the Amarin Corporation, which funded Bhatt’s research.

The product is available by prescription only for patients with high triglycerides. But the company is expected to apply for FDA approval within the next year to expand treatment to include all high-risk cardiovascular patients.

4 DRUG AND BIOTECH STOCKS AWAITING FDA APPROVAL IN JULY 2017

FDA Decisions in July

by Kinjel Shah

http://bit.ly/2KqNeLd

We are into the second half of the year. It’s time to analyze how the first half turned out to be for pharma and biotech stocks in terms of FDA decisions. The regulatory body approved 17 novel drugs in the first half of 2018, which is less than the year-ago period figure of 23. However, with several FDA decision lined up for the second half, a higher number of drugs could be approved in the rest of the year.

Key FDA approvals in the first half included Amgen/Novartis’s first CGRP antibody Aimovig/erenumab for prevention of migraine, Johnson & Johnson’s next-generation oral androgen receptor (“AR”) inhibitor Erleada (apalutamide) for pre-metastatic prostate cancer (CRPC), Vertex Pharmaceuticals’ third medicine to treat the underlying cause of CF, Symdeko, which is a combination of tezacaftor and ivacaftor and BioMarin Pharmaceuticals’ Palynziq to treat phenylketonuria (PKU).

With the drug development process being lengthy and time-consuming, plus requiring the utilization of a lot of funds and resources, key pipeline events including data readouts and regulatory updates are of paramount importance and could act as major catalysts.

Let’s take a look at a few important regulatory events scheduled for the month of July.

Drug and Biotech Stocks Awaiting FDA Decisions in July: Indivior (INVVY)

FDA Decision on Indivior’s Schizophrenia Injection RBP-7000: On Jul 28, the FDA is expected to give its decision on Indivior‘s RBP-7000, which has been developed for the treatment of schizophrenia.

RBP-7000 is a once-monthly injectable risperidone given using the Atrigel delivery system. Indivior is a Zacks Rank #3 (Hold) stock.

Drug and Biotech Stocks Awaiting FDA Decisions in July: Progenics (PGNX)

Progenics Pharmaceuticals’ Azedra Review: Progenics new drug application (NDA), looking to get its pipeline candidate, Azedra approved for the treatment of patients suffering from malignant rare neuroendocrine tumors — pheochromocytoma and paraganglioma — is under review.

The FDA is expected to give its decision on Jul 30, after a three-month delay from the previous FDA action date in March. Azedra was added to Progenics’ portfolio with the acquisition of Molecular Insight Pharmaceuticals in 2013.

Drug and Biotech Stocks Awaiting FDA Decisions in July: Insys Therapeutics (INSY)

Decision on Insys Therapeutics’ Pain Candidate: On Jul 28, the FDA is also expected to give its decision on Insys Therapeutics’ buprenorphine sublingual spray for moderate-to-severe acute pain. It is important to remember that in May an FDA advisory committee voted against its approval.

The company had filed a new drug application (“NDA”) in September last year based on positive data from a pivotal study on the candidate. The FDA accepted the NDA for review in December assigning a PDUFA date of Jul 28, 2018.

It is quite possible that the unfavorable vote by the committee may influence the FDA’s decision and delay the approval of the drug.

Drug and Biotech Stocks Awaiting FDA Decisions in July: GlaxoSmithKline (GSK)

Will an FDA Panel Back New Indication for Glaxo’s Nucala?: Toward the end of the  month, an FDA panel is expected to give its opinion on GlaxoSmithKline‘s  label expansion filing for eosinophilic asthma drug, Nucala (mepolizumab) for a  new indication –  chronic obstructive pulmonary disease (COPD). With the latest filing, Glaxo is looking to get Nucala approved as an add-on maintenance treatment of COPD with an eosinophilic phenotype.

Nucala is presently approved for treating severe eosinophilic asthma and eosinophilic granulomatosis with polyangiitis (“EGPA”). Glaxo hadfiled a supplemental Biologics License Application (sBLA) to the FDAfor label expansion of Nucala to include use in COPD in November last year.

Although the FDA takes the recommendations of its panels/advisory committee into account while reviewing applications, it is not bound to follow the same.

EXISTING DRUG MAY HELP TO TREAT AGGRESSIVE BRAIN CANCER

by Maria Cohut

https://www.medicalnewstoday.com/articles/322427.php

https://www.medicalnewstoday.com/authors/maria-cohut

View all articles written by Maria Cohut

Glioblastoma is an aggressive brain cancer that progresses very rapidly and often becomes treatment resistant. The commonest chemotherapy drug used to treat glioblastoma, temozolomide, tends not to be as effective as one might hope. But could a common altitude sickness drug enhance its success?

https://www.medicalnewstoday.com/articles/322427.php

To enhance the effectiveness of chemotherapy against glioblastoma, scientists turn to an unlikely aid: an altitude sickness drug.

 https://www.ncbi.nlm.nih.gov/pubmed/22122467

Temozolomide (TMZ) works by modifying DNA, so that certain proteins that allow the tumors to grow and expand do not express.

But, some tumor cells are able to “resist” TMZ’s action.

This means that the drug’s effectiveness is often limited, which affects patient survival rates.

But a new study conducted by researchers from the University of Chicago in Illinois has made an intriguing discovery.

https://pubchem.ncbi.nlm.nih.gov/compound/acetazolamide

Acetazolamide (brand name Diamox) — a drug commonly used to treat altitude sickness and other health problems, such as glaucoma and even seizures — may counteract the resistance put up by glioblastoma cells, thus enhancing TMZ’s effect.

Study director Dr. Bahktiar Yamini explains that, if the new findings hold strong, acetazolamide would be a very convenient therapeutic aid, since it is “cheap to make, easy to take, and has limited side effects.”

The researchers’ results have now been published in the journal Science Translational Medicine.

Hope for a combination treatment

The research team found that patients with this aggressive form of brain cancer tended to be TMZ treatment resistant if they had high levels of B cell CLL/lymphoma 3 (BCL-3), a protein able to counteract the action of the chemotherapy drug.

BCL-3 blocks TMZ by activating carbonic anhydrase II, an enzyme that shields the tumor cells, and allows them to continue their cycle. HYPERLINK https://www.medicalnewstoday.com/articles/322410.php?iacp

“‘Backpacked drugs’ can boost immunotherapy for solid tumors”

Working with a mouse model of glioblastoma, the team experimented with acetazolamide, testing to see whether it, in turn, would block the activity of carbonic anhydrase, thereby allowing TMZ to do its work.

“We tested this combination treatment strategy in several animal models,” explains Dr. Yamini.

This strategy, the researchers found, cured some of the mice, while other animals saw a 30–40 percent increase in survival time following the combination treatment.

That is because acetazolamide is, in fact, a carbonic anhydrase inhibitor, and the team was able to gauge this by looking, initially, at existing studies looking at human patients with glioblastoma.

In their preliminary research, Dr. Yamini and team found that individuals with lower BCL-3 levels also had longer survival rates after treatment with TMZ, compared with other patients with high levels of this protein.

“An important feature of predictors like BCL-3 is that they are informative,” explain the researchers. “They can identify pathways to improve treatment response.”

So, by looking at BCL-3 mechanisms, the scientists were eventually able to pinpoint acetazolamide as a carbonic anhydrase inhibitor that could support the effect of TMZ.

“Our data,” add the authors, show that it is the “induction of [carbonic anhydrase II] by TMZ that is important in modulating response to therapy.”

Dr. Yamini and colleagues suggest that, in the future, a prospective randomized clinical trial should be conducted in order to confirm that testing for BCL-3 can indicate which patients will respond best to TMZ, and which are likely to be treatment resistant.

The researchers hope that a combination of TMZ and acetazolamide could eventually be used to enhance treatment efficacy for patients with high levels of BCL-3. The team is already planning clinical trials and looking to recruit participants.

RESEARCH TEAM DISCOVERS DRUG COMPOUND THAT STOPS CANCER CELLS FROM SPREADING

June 22, 2018, Oregon Health & Science University

https://medicalxpress.com/news/2018-06-team-drug-compound-cancer-cells.html

Fighting cancer means killing cancer cells. However, oncologists know that it’s also important to halt the movement of cancer cells before they spread throughout the body. New research, published today in the journal Nature Communications, shows that it may be possible to freeze cancer cells and kill them where they stand.

Raymond Bergan, M.D., Division Chief of Hematology and Medical Oncology and professor of medicine at OHSU, says that the majority of cancer treatment therapies today are directed toward killing cancer. To date, he says, no one has developed a therapy that can stop cancer cells from moving around the body.

“For the vast majority of cancer—breast, prostate, lung, colon, and others—if it is detected early when it is a little lump in that organ and it has not spread, you will live. And generally, if you find it late, after it has spread throughout your body, you will die,” says Bergan, also the associate director of medical oncology in the OHSU Knight Cancer Institute and director of the OHSU Bergan Basic Research Laboratory. “Movement is key: the difference is black and white, night and day. If cancer cells spread throughout your body, they will take your life. We can treat it, but it will take your life.”

For that reason, the study of cancer cell movement, or motility, has been the focus of his group’s research for several decades.

Stopping cancer cell movement

In 2011, Bergan and team took a novel approach to their research by working with chemists to jointly discover a drug that will inhibit the movement of cancer cells. The Nature Communications paper outlines the multidisciplinary team’s work with KBU2046, a compound that was found to inhibit cell motility in four different human cell models of solid cancer types: breast, prostate, colon and lung cancers.

“We used chemistry to probe biology to give us a perfect drug that would only inhibit the movement of cancer cells and wouldn’t do anything else,” Bergan says. “That basic change in logic lead us to do everything we did.”

A multidisciplinary team

The team of investigators includes Bergan’s team at OHSU, a chemist from Northwestern University as well as researchers from Xiamen University in China, the University of Chicago, and the University of Washington. Ryan Gordon, Ph.D., research assistant professor in the OHSU School of Medicine and co-director of the Bergan lab, says drawing upon the strengths of this cross-functional group was key to the research’s success. “As we identified areas we were lacking, we looked at new cutting-edge technologies, and if there was something that didn’t meet our needs, we developed new assays to address our needs,” he says.

The lab of Karl Scheidt, Ph.D., professor of chemistry and professor of pharmacology; director of the Center for Molecular Innovation and Drug Discovery; and executive director of the NewCures accelerator at Northwestern University, was responsible for the design and creation of new molecules which were then evaluated by Bergan’s team for their ability to inhibit cell motility. Using chemical synthesis approaches, Scheidt and team accessed new compounds that minimized motility in tumor cells, with few side effects and very low toxicity.

“We’ve taken a clue provided by nature and through the power of chemistry created an entirely new way to potentially control the spread of cancer,” Scheidt says. “It’s been a truly rewarding experience working together as a team toward ultimately helping cancer patients.”

Refining the drug

Bergan notes the process for narrowing down the specific drug compound was a process of refinement. “We started off with a chemical that stopped cells from moving, then we increasingly refined that chemical until it did a perfect job of stopping the cells with no side effects,” he says. “All drugs have side effects, so you look for the drug that is the most specific as possible. This drug does that.”

Bergan says the key to this drug was engaging the heat shock proteins—the “cleaners” of a cell. “The way the drug works is that it binds to these cleaner proteins to stop cell movement, but it has no other effect on those proteins.” He says it is a very unusual, unique mechanism that “took us years to figure out.”

“Initially, nobody would fund us,” Bergan says. “We were looking into a completely different way of treating cancer.”

Next step: testing the drug in humans

Ultimately, Gordon says the goal of this research is to look for a new therapeutic to benefit humans.

“The eventual promise of this research is that we’re working toward developing a therapeutic that can help manage early stage disease, preventing patients from getting the more incurable later-stage disease,” he says. He’s quick to note this work has not been tested in humans, and doing so will require both time and money. The team’s best estimate is that will take about two years and five million dollars of funding. They are currently raising money to do IND (investigational new drug) enabling studies, a requirement to conduct a clinical trial of an unapproved drug or an approved product for a new indication or in a new patient population.

In addition, Drs. Bergan and Scheidt have founded a company, Third Coast Therapeutics, aimed to bring this type of therapy to patients.

“Our eventual goal is to be able to say to a woman with breast cancer: here, take this pill and your cancer won’t spread throughout your body. The same thing for patients with prostate, lung, and colon cancer,” Bergan says. “This drug is highly effective against four cancer types (breast, colon, lung, prostate) in the in vitro model so far. Our goal is to move this forward as a therapy to test in humans.”

Bergan says his team feels lucky to have the opportunity to conduct this challenging research at the OHSU Knight Cancer Institute, an institute dedicated to novel approaches to detecting and treating cancer.

“What early detection is trying to do is detect an early, lethal lesion. Cancers are lethal because they move,” he says. “This drug is designed to stop that movement.”

MENOPAUSE SYMPTOMS: LOSS OF FEMALE LIBIDO

Learn how to cope with decreased female libido and make your sex life work for you

by Jane Parry

https://www.everydayhealth.com/menopause/loss-of-libido.aspx

Along with hot flashes, mood swings, and sleep disturbances, reduced female libido (sex drive) is one of the most distressing symptoms associated with menopause. Yet an article published in the prestigious British Medical Journal indicates there is no way to predict which symptoms may affect you.

What you do have in common with other women experiencing menopause is the fact that your ovaries are making less of the female sex hormones estrogen and progesterone. It’s no surprise, then, that you may be experiencing a loss of female libido. And this could continue well into your postmenopausal years, according to the North American Menopause Society’s Menopause Guidebook.

On the other hand, no woman going through menopause has exactly the same experience or symptoms. The U.S. National Institute on Aging, for example, has research that finds the female libido is not affected by menopause at all, and some women may actually feel sexier after menopause.

“If you’re not part of the minority with severe symptoms, menopause can be a very freeing thing. You don’t have to worry about fertility issues, and it can be a time of renewal,” says Linda Weiner, MSW, a sex therapist and licensed clinical social worker based in St. Louis.

How Menopause Affects the Female Libido

As you go through menopause, you may experience disturbed sleep, vaginal dryness, and psychological changes. The upheaval of sleep patterns caused by these symptoms can leave you less interested in sex, the Menopause Society’s guidebook says.

Decreased blood supply to the vagina can lead to vaginal dryness and thinning of the vaginal wall lining (atrophy). This can make sexual intercourse uncomfortable and even painful, hardly a recipe for sexual arousal. In addition, your body is producing less of the male sex hormone androgen, which is thought to be associated with desire.

Coping With Decreased Female Libido

If you’re experiencing a loss of libido, you know it’s much more than a physical issue. You may feel guilty, frustrated, and depressed. If you do, you’re not alone, “Some women experience a sense of loss and grieving. Their bodies are changing, and to complicate matters, this sometimes correlates with the beginning of empty-nest syndrome,” Weiner says.

But you don’t have to keep your feelings to yourself. Weiner recommends that you express your concerns to your partner and together figure out how to make your sex life work. It’s really important that both partners read up on this, and it’s important for husbands and partners to understand the physical and emotional changes you’re going through. Ask your partner for what you need; maybe it’s more wooing or dating. “If you need the fan on full-power during sex, so be it. Find ways to overcome things that get in the way of desire or don’t contribute to it,” Weiner says.

You and your partner may also want to consider meeting with a sex therapist, who can give you specific, individualized advice. And you should discuss your physical symptoms with your obstetrician-gynecologist, who may be able to prescribe something to help you.

Menopause Symptoms: Treating Low Libido

Although there are no drugs that can specifically treat sexual libido problems associated with menopause, the following options may help:

Water-based vaginal moisturizers can help relieve dryness during sexual intercourse.

Vaginal estrogen, in tablet, ring, or cream form, can also relieve vaginal dryness without the risks of systemic hormone replacement therapy.

Tibolone, a synthetic steroid that is also a weak mimic of progestogen, estrogen, and androgen, has effectively treated the symptoms of vaginal atrophy in some women.

Menopause Treatments That May Not Address Libido Issues

Hormone replacement therapy (HRT) can ease many of the uncomfortable symptoms of menopause, but it may not necessarily improve libido. A study by researchers at Lund University, Sweden, published in the medical journal Menopause, found that almost 40 percent in a sample of 2,043 menopausal women who were taking combined estrogen and progestogen therapy reported decreased libido.

Androgen, a male hormone which is sometimes prescribed as part of HRT, may ease some menopause symptoms; however, clinical guidelines published in The Endocrine Society’s Journal of Clinical Endocrinology & Metabolism warn that test results have been inconclusive.