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Hepatic tumors induced by carbon tetrachloride in transgenic mice carrying a human c‐H‐ ras proto‐oncogene without mutations
Author(s) -
Tsunematsu Satoshi,
Saito Hidetsugu,
Kagawa Tatehiro,
Morizane Toshio,
Hata JunIchi,
Nakamura Tatsuya,
Ishii Hiromasa,
Tsuchiya Masaharu,
Nomura Tatsuji,
Katsuki Motoya
Publication year - 1994
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.2910590420
Subject(s) - carbon tetrachloride , ccl4 , genetically modified mouse , oncogene , hepatocellular carcinoma , ratón , metastasis , pathology , transgene , biology , cancer research , medicine , cancer , gene , endocrinology , chemistry , cell cycle , biochemistry , organic chemistry
Hepatic tumors were generated in mice by repeated administration of carbon tetrachloride (CCI 4 ). Eight transgenic (Tg) mice carrying a human c‐H‐ ras proto‐oncogene (rasH2 line) and 9 non‐Tg mice were killed at 20 weeks. Tg mice developed more tumors than did non‐Tg littermates. Most tumors were neoplastic nodules, but I hepatocellular carcinoma (HCC) was found in a Tg mouse at 20 weeks. Three Tg and 2 non‐Tg mice were kept without further administration of CCI 4 . Two Tg mice died at 30 weeks of HCC with intra‐abdominal bleeding, and I Tg mouse developed HCC with a mesenteric metastasis at 32 weeks. No HCC was found in 2 non‐Tg mice at 32 weeks. Although mutations at codon 12, 13, and 61 of the H‐ ras gene are often found in murine hepatocarcinogenesis, neither the tumors, including one HCC, nor the normal cells revealed any such mutations. These results showed that the unmutated human c‐H‐ ras gene facilitates malignant transformation of hepatocytes when continuous liver‐cell death and regeneration is caused by repeated administration of CCI 4 . © 1994 Wiley‐Liss, Inc.