In vitro morphological changes induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-(butanone) in fetal hamster respiratory tract tissue.

In vitro morphological changes induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-(butanone) in fetal hamster respiratory tract tissue.
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4-(甲基亚硝基氨基)-1-(3-吡啶基)-1-(丁酮)在胎仓鼠呼吸道组织中诱导的体外形态学变化。

DOI:
10.1016/0304-3835(89)90057-8
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发表时间:
1989
期刊:
影响因子:
9.7
通讯作者:
Castonguay,A
Castonguay,A
中科院分区:
医学1区
文献类型:
--
作者:
Joshi,PA;Schuller,HM;Rossignol,G;Castonguay,A

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本实验室先前的研究表明,烟草特有的亚硝胺4-(甲基亚硝胺)-1-(3-吡啶基)-1-丁酮(NNK)被仓鼠胎儿呼吸道组织代谢,形成DNA烷基化和致染色体断裂的中间体。本研究旨在探索是否可以检测到与此类事件相容的形态学变化。将胎仓鼠气管和肺的外植体在体外暴露于不同浓度的NNK,并通过光学和电子显微镜进行研究。外植体在气管中表现出剂量依赖性肿瘤前病变,而肺外植体表现出与表面活性剂的干扰产生和/或释放相容的形态学变化。
Previous studies conducted in our laboratories have shown that the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is metabolized by fetal hamster respiratory tissues to form DNA-alkylating and clastogenic intermediates. This study was conducted to explore if morphological changes compatible with such events could be detected. Explants of fetal hamster tracheas and lungs were exposed in vitro to various concentrations of NNK and investigated by light and electron microscopy. The explants demonstrated dose dependent preneoplastic lesions in the trachea, while the lung explants exhibited morphological changes compatible with disturbed production and/or release of surfactant.
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