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慢性暴露于空气污染使老鼠肥胖

发布日期:2018-09-24 作者:admin

A laboratory study on rats found that the animals that breathed Beijing’;s notoriously polluted air gained weight and showed signs of cardio-respiratory and metabolic dysfunctions after three to eight weeks of exposure。

My grandparents live in a small farm in the countryside, and though they’;re probably the oldest people I know, they’;re in remarkably good shape。 Better than me even。 My grandma used to say it’;s the clean air out there that keeps them healthy, while my grand-dad thought that “;all that junk food makes me fat。”;

He’;s really nice like that。 But, as it turns out, he was right —; and my grandma more so。

When your Beijing rat-friend comes visiting。
Image via wikipedia

It’;s in the air

A Duke University team placed pregnant rats and their offspring in two chambers, one connected to Beijing’;s outdoor air and the other receiving filtered air, free of most impurities and pollution particles。 After living in these conditions for 19 days, the lungs and livers of pregnant rat****posed to the polluted air were heavier and showed increased tissue inflammation。

The rats had 50 percent higher LDL cholesterol; 46 percent higher triglycerides; 97 percent higher total cholesterol and showed greater insulin resistances (indicative of the early stages of Type 2 diabetes) than their control-group counterparts。

These numbers support the study’;s conclusion that city air pollution leads to metabolic dysfunction and fosters obesity。 At the end of the eight weeks study period, female and male rat****posed to the pollution were 10 percent and 18 percent heavier, respectively, than those exposed to clean air。

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