2015 Fiscal Year Final Research Report
Environmental and genetic factors for the development of gallbladder cancer in Peruvians
| Project/Area Number |
24590767
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Hygiene
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| Research Institution | Niigata University of Health and Welfare |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ENDOH Kazuo 新潟医療福祉大学, 健康栄養学科, 教授 (60176790)
TSUCHIYA Yasuo 新潟大学, 医歯学総合研究科, 客員研究員 (60334679)
ASAI Takao 新潟医療福祉大学, 臨床技術学科, 助教 (60612736)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | 胆嚢がん / 環境要因 / 遺伝要因 / ペルー |
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| Outline of Final Research Achievements |
The concentrations of aflatoxin (AF) B1, B2, G1, G2 or ochratoxin A (OTA) in red chili peppers from Peru were measured using HPLC methods, and AFB1 and OTA were detected. The mean concentrations of OTA in red chili peppers from Chile, Bolivia, and Peru were higher in the order of the incidence of gallbladder cancer (GBC) among the three countries. These findings suggest the possibility that mycotoxin contamination of red chili peppers are associated with developing GBC.
The frequency of TP53 and K-ras mutations in DNA extracted from paraffin embedded tissues of GBC patients were examined. TP53 mutations were found in 7 patients (7/18, 39%), namely 4 of transition type, 2 of transversion type, and 1 of insertion type. However, G:C to T:A transversion suggesting the presence of exogenous carcinogens, and K-ras mutation were not found. Our findings suggest that the development of GBC in Peruvians is more strongly associated with endogenous mechanisms rather than exogenous carcinogens.
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| Free Research Field |
疫学
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