Dr Rehan and his team injected their rats with nicotine when they were six days pregnant.
Rehan博士和他的团队在大鼠怀孕的第六天为其注射尼古丁。
They then allowed them to give birth and raised the pups to the age of three weeks, beforesome were examined.
大鼠的后代出生后,由母鼠养育三周。
The rest were allowed to mature and breed, and their own offspring were similarlyexamined.
然后研究人员选取一部分后代进行检查,其余的第二代大鼠继续生长繁殖,最后研究人员对第三代大鼠进行类似的检验。
There was, however, no further administration of nicotine.
但是,第二代大鼠在妊娠期间,不再被注射尼古丁。
The pups of the treated mothers had asthmatic lungs.
检测发现,被注射尼古丁的母鼠所繁殖的第二代大鼠肺部有哮喘病变。
The organs airways were constricted,
大鼠肺部的气道处于收缩状态。
and molecular analysis showed abnormally high levels of fibronectin and collagenwhichwould stiffen the lung tissueand also high levels of receptor molecules for nicotine.
经过分子分析发现,大鼠肺部的纤维连接蛋白和胶原蛋白含量异常升高,这将导致肺组织硬化;同时尼古丁受体分子增加。
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