Intrahepaticparasite infection and cholangiocarcinomas
Grant-in-Aid for Overseas Scientific Survey.
|Section||Special Cancer Research|
|Research Institution||Nagoya City University|
ITO Nobuyuki Nagoya City University, 医学部, 教授 (00079956)
LEE YougーSoo ソウル国立大学, 獣医学部, 教授
伊東 誠 名古屋市立大学, 医学部, 助手 (90137117)
白井 智之 名古屋市立大学, 医学部, 助教授 (60080066)
LEE Yong-soon Seoul National University
SHIRAI Tomoyuki Nagoya City University
ITO Makoto Nagoya City University
|Project Fiscal Year
1993 – 1993
Completed(Fiscal Year 1993)
|Budget Amount *help
¥3,200,000 (Direct Cost : ¥3,200,000)
Fiscal Year 1993 : ¥3,200,000 (Direct Cost : ¥3,200,000)
|Keywords||Clonorchis siensis / Korea / cholangiocellular carcinoma / hepatocellular carcinoma / 肝吸虫 / 韓国 / 胆管細胞癌 / 肝細胞癌|
The northeast area of Thailand where the liver fluke parasite Opisthorchis viverrini (OV) is endemic and economically disadvantaged people eat raw fish harboring parasite metacercariae has a high incidence of cholangiocellular cancer. Previously we have demonstrated that OV infestation significantly enhances development of cholangiocellular carcinoma in hamster livers and that prolonged inflammation and regenerative epithelial hyperplasia may play important roles in development of cholangiocellular carcinomas in OV infested livers. The present investigation was performed to see whether there is any association between development of cholangiocellular carcinomas and infection with Clonorchis sinensis in Korea.
With assistance from Professor Soo Song, Department of Parasitology, College of Medicine Pusan National university, we collected pathological data on over 440 liver tumors surgically removed at Pusan National University and Kosin Medical College and Gospel Hospital in Pusan, Korea.
Of these, 432 cases aged more than 20 years old were subjected to analysis. They comprised 337 males (mean age 50.9 years old (27-73 yrs)) and 95 females (mean age 51.2 years old (21-76 yrs)). Forty nine males (14.5%) and 12 females (12.6%) were revealed to be infected with liver flukes by stool examination and/or histopathology of the livers and 88 males and 24 females were negative for both examinations. Hepatocellular carcinomas and cholangiocellular carcinomas were present in 97 cases and 14 cases, respectively among the 112 infection-negative cases, whereas they were found in 32 and 28, respectively, of the 61 infection-positive cases. A significant difference (P<0.001, Fischer exact analysis) in the incidences of each type of carcinoma was evident between the infection-positive and negative groups.
Thus, these results clearly demonstrate that infection with Clonorchis sinensis is also a risk factor for development of cholangiocellular carcinomas.
4.まとめ:今回の外科的摘出標本の検討から韓国におけるclonorichis sinensisの感染がタイで観察されたように肝内胆管癌の発生を促進していることを明らかにしえた。現在では肝吸虫に対する啓蒙と治療薬プラジカンテルの普及により韓国の肝吸虫の感染率はきわめて低くなっており,胆管細胞癌は今後減少する事が期待される。 Less
Research Output (12results)