The tumor spectrum in FHIT-deficient mice

The tumor spectrum in FHIT-deficient mice
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DOI:
10.1073/pnas.191345898
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发表时间:
2001-08-28
影响因子:
11.1
通讯作者:
Huebner, K
Huebner, K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zanesi, N;Fidanza, V;Huebner, K

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携带一种失活 Fhit 等位基因的小鼠(Fhit +/- 小鼠)对 N-亚硝基甲基苄胺诱导肿瘤高度敏感,100% 的 Fhit +/- 小鼠表现出前胃/鳞柱交界处肿瘤,而 Fhit +/+ 对照小鼠为 25%。在当前的研究中,对 Fhit +/+、+/- 和 -/- 小鼠施用单一剂量的 N-亚硝基甲基苄胺,以比较 +/- 和 -/- Fhit 缺陷小鼠的致癌物敏感性。治疗后 29 周,7.7% 的野生型小鼠出现肿瘤。在 Fhit -/- 小鼠中,89.5% 表现出前胃和鳞柱交界处的肿瘤(平均 3.3 个肿瘤/小鼠);一半的-/-小鼠患有中型(2毫米直径)到大型(>2毫米)肿瘤。在 Fhit +/- 小鼠中,78% 表现出肿瘤(平均每只小鼠 2.4 个肿瘤),22% 表现出中型至大型肿瘤。未经治疗的 Fhit 缺陷小鼠的自发性肿瘤观察长达 2 年。 Fhit +/- 小鼠(平均年龄 21 个月)平均有 0.94 个不同类型的肿瘤; Fhit -/- 小鼠(平均年龄 16 个月)也显示出一系列肿瘤(平均每只小鼠 0.76 个肿瘤)。在一个或两个 Fhit 等位基因失活的小鼠中观察到的相似的自发肿瘤和诱导肿瘤谱表明,Fhit 可能是某些组织中的一次性肿瘤抑制基因。
Mice carrying one inactivated Fhit allele (Fhit +/- mice) are highly susceptible to tumor induction by N-nitrosomethylbenzylamine, with 100% of Fhit +/- mice exhibiting tumors of the forestomach/ squamocolumnar junction vs. 25% of Fhit +/+ controls. In the current study a single N-nitrosomethylbenzylamine dose was administered to Fhit +/+, +/-, and -/- mice to compare carcinogen susceptibility in +/- and -/- Fhit-deficient mice. At 29 weeks after treatment, 7.7% of wild-type mice had tumors. Of the Fhit -/- mice 89.5% exhibited tumors (average 3.3 tumors/mouse) of the forestomach and squamocolumnar junction; half of the -/- mice had medium (2 mm diameter) to large (>2 mm) tumors. Of the Fhit +/- mice 78% exhibited tumors (average 2.4 tumors/mouse) and 22% showed medium to large tumors. Untreated Fhit-deficient mice have been observed for up to 2 years for spontaneous tumors. Fhit +/- mice (average age 21 mo) exhibit an average of 0.94 tumors of different types; Fhit -/- mice (average age 16 mo) also showed an array of tumors (average 0.76 tumor/mouse). The similar spontaneous and induced tumor spectra observed in mice with one or both Fhit alleles inactivated suggests that Fhit may be a one-hit tumor suppressor gene in some tissues.