HOW CAN OBESITY BOTH FUEL TUMOR GROWTH AND HELP NEW IMMUNOTHERAPY DRUGS WORK BETTER?

Rich Haridy

The same obesity-driven process that speeds up cancer growth may also help improve the efficacy of new tumor-killing immunotherapy treatments(Credit: frenta/Depositphotos)

Two new studies have provided compelling insights into the relationship between obesity and cancer. The research reveals fascinatingly paradoxical effects, suggesting obesity can suppress our immune responses to enhance tumor growth, but also improve the efficacy of a new kind of cancer-killing immunotherapy.

The first study, from Trinity College Dublin, focuses on the effect of obesity on a type of immune cell known as natural killer (NK) cells. These cells play a vital role in cancer surveillance, hunting the body for tumor cells, and activating an immune attack when they track then down.

The research revealed that excess fat can fundamentally blunt the anti-tumor responses of NK cells by essentially “clogging up” the cells and inhibiting their cytotoxic machinery. The study suggests that metabolic reprogramming of these NK cells could kick-start their anti-cancer activity, offering a potential new treatment strategy.

The second study, from UC Davis, homed in on another mechanism by which obesity drives tumor growth. It found that leptin, a hormone produced by fat cells in the body, mediated dysfunction in cancer-killing T-cells by increasing the presence of a protein called PD-1.

“In obese animals cancer grows faster because there are more nutrients for tumors and because the immune system is more suppressed,” says William Murphy, co-author of the UC Davis study.

PD-1 essentially acts to turn down immune system activity, and cancer cells can cleverly stimulate that protein to avoid attack from the immune system. A new class of immunotherapy drugs called checkpoint inhibitors work by blocking PD-1 activation, releasing the brake on T-cells to help them better hunt, and kill, cancer cells.

Interestingly, previous research has revealed that these new checkpoint inhibitor drugs are more effective in obese patients. The new study further examined this odd paradoxical outcome confirming in both animal and human cohorts that PD-1 inhibitors are indeed more effective in obese patients compared to non-obese patients.

“It’s counter-intuitive because up to this point all of our studies showed that obesity resulted in more toxicities associated with immunotherapy treatments,” says Murphy. “This is a game-changer because when we personalize medicine and look at body mass index, in some situations it can be bad, and in some situations it can be helpful.”

The hypothesis is that the excess of PD-1 brought on by obesity actually makes the checkpoint inhibitor drugs more effective in activating the body’s T-cells. The UC Davis team do caution that this doesn’t mean cancer patients embarking upon a new checkpoint inhibitor treatment run out and commence a high-fat diet to enhance the drug, but instead the discovery could help better home in on the most effective treatment for individual patients.

“We are not advocating for obesity as improving prognosis for cancer patients,” says Arta Monjazeb, co-last author on the study. “But obesity appears to induce immune suppression and accelerated tumor growth through mechanisms that can be successfully reversed by checkpoint inhibitor immunotherapy.”

It’s clear that while obesity may improve the efficacy of certain new immunotherapies, it also certainly hampers the immune system, and causes tumors to grow more aggressively. Further research from the UC Davis team will explore whether this specific mechanism, that increases the effect of checkpoint inhibitors, can be harnessed to make the new immunotherapy treatment successful in more patients.

The first study was published in the journal Nature Immunology, while the second study appears in the journal Nature Medicine.

Sources: Trinity News, UC Davis

https://newatlas.com/obesity-cancer-immune-system-checkpoint-inhibitor/57195/

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.

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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.