Identification of an autophagy defect in smokers' alveolar macrophages.

Identification of an autophagy defect in smokers' alveolar macrophages.
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DOI:
10.4049/jimmunol.1001603
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发表时间:
2010-11-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Hunninghake GW
Hunninghake GW
中科院分区:
其他
文献类型:
--
作者:
Monick MM;Powers LS;Walters K;Lovan N;Zhang M;Gerke A;Hansdottir S;Hunninghake GW

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Alveolar macrophages are essential for clearing bacteria from the alveolar surface and preventing microbial-induced infections. It is well documented that smokers have an increased incidence of infections, in particular lung infections. Alveolar macrophages accumulate in smokers’ lungs but they have a functional immune deficit. In this study, we identify for the first time an autophagy defect in smokers’ alveolar macrophages. Smokers’ alveolar macrophages accumulate both autophagosomes and p62, a marker of autophagic flux. The decrease in the process of autophagy leads to impaired protein aggregate clearance, dysfunctional mitochondria and defective delivery of bacteria to lysosomes. This study identifies the autophagy pathway as a potential target for interventions designed to decrease infection rates in smokers and possibly in individuals with high environmental particulate exposure.
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