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자료유형
학술대회자료
저자정보
SANJAY K. SRIVASTAVA (TEXAS TECH UNIVERSITY HEALTH SCIENCES CENTER)
저널정보
한의병리학회 대한동의병리학회 학술대회논문집 2015 The Korean Society of Oriental Pathology International Symposium
발행연도
2015.10
수록면
10 - 43 (34page)

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Capsaicin, the pungent alkaloid of red pepper has been studied extensively for its anti-inflammatory and anti-oxidant properties. Several studies have shown significant chemopreventive effects of capsaicin against several mutagens and carcinogens. Recent studies indicated that capsaicin suppresses cancer growth by inhibiting cell proliferation and induces apoptosis. Although, capsaicin is a TRPV1 agonist, various reports indicated that the anti-cancer effect of capsaicin is independent of TRPV1. Our studies have shown that capsaicin suppresses the growth of various pancreatic cancer cells and induces apoptotic death. Interestingly, effects of capsaicin were more specific to cancer cells with little or no toxicity towards normal human pancreatic cells. By modulating mitochondrial electron transport complexes, capsaicin generates reactive oxygen species and disrupts mitochondrial functions of pancreatic cancer cells, resulting in the release of cytochrome c into the cytosol and activating caspase-3 cascade. In addition, capsaicin reduces the levels of cellular antioxidants like glutathione, thioredoxin and superoxide dismutase. Capsaicin also inhibits beta catenin pathway and acetylates FOXO-1 through CBP, leading to apoptosis. Oral administration of 5mg/kg capsaicin suppresses the growth of various pancreatic tumor cells in xenograft and orthotopic tumor model. In addition, 10 p.p.m. capsaicin in diet for eight weeks significantly suppresses chronic pancreatitis and progression of PanIN-1 to high grade PanIN-2 and PanIN-3 lesions in KRas<SUP>G12D</SUP>/Pdx-1 mouse model of pancreatic cancer. When given in combination, capsaicin significantly potentiates the anti-tumor effects of gemcitabine. In conclusion, capsaicin targets multiple survival pathways in pancreatic cancer cells resulting in overall tumor growth suppression. [Supported by R01 grant CA129038 awarded by the National Cancer Institute. NIH]

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