Ki‐ras Activation in Pancreatic Carcinomas of Syrian Hamsters Induced by N‐Nitrosobis(2‐hydroxypropyl)amine

Ki‐ras Activation in Pancreatic Carcinomas of Syrian Hamsters Induced by N‐Nitrosobis(2‐hydroxypropyl)amine
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N-亚硝基双(2-羟丙基)胺诱导的叙利亚仓鼠胰腺癌中 Ki-ras 激活

DOI:
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发表时间:
1991
期刊:
Japanese journal of cancer research : Gann
影响因子:
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通讯作者:
M. Nagao
M. Nagao
中科院分区:
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文献类型:
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作者:
T. Ushijima;M. Tsutsumi;R. Sakai;Y. Ishizaka;F. Takaku;Y. Konishi;Michihito Takahashi;T. Sugimura;M. Nagao

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使用聚合酶链反应和直接测序,分析了由N-亚硝基双(2-羟丙基)胺诱导的叙利亚金黄地鼠中的5个胰腺癌在密码子12和13处的Ki-ras活化。Ki-ras基因在五种癌中的四种中被激活,并且通过亚克隆和测序进一步证实了结果。所有突变均涉及密码子12第二位的G → A转换,导致氨基酸水平从甘氨酸变为天冬氨酸。该突变与N-亚硝基双(2-氧代丙基)胺诱导的叙利亚仓鼠胰腺肿瘤报告的突变相同。
Five pancreatic carcinomas induced by N‐nitrosobis(2‐hydroxypropyl)amine in Syrian golden hamsters were analyzed for activation of Ki‐ras at codons 12 and 13, using the polymerase chain reaction and direct sequencing. The Ki‐ras gene was shown to be activated in four of the five carcinomas, and the results were further confirmed by subcloning and sequencing. All the mutations involved a G‐to‐A transition at the second position of codon 12, which resulted in a change at the amino acid level from glycine to aspartic acid. This mutation is identical with that reported for pancreatic tumors of Syrian hamsters induced by N‐nitrosobis(2‐oxopropyl)amine.
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