Age-related oxidative stress compromises endosomal proteostasis.
Age-related oxidative stress compromises endosomal proteostasis.
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DOI:
10.1016/j.celrep.2012.06.005
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发表时间:
2012-07-26
期刊:
影响因子:
8.8
通讯作者:
Santambrogio L
中科院分区:
文献类型:
--
作者:
Cannizzo ES;Clement CC;Morozova K;Valdor R;Kaushik S;Almeida LN;Follo C;Sahu R;Cuervo AM;Macian F;Santambrogio L
A hallmark of aging is an imbalance between production and clearance of reactive oxygen species and increased levels of oxidatively damaged biomolecules. Herein we demonstrate that splenic and nodal antigen presenting cells purified from old mice accumulate oxidatively modified proteins with side chain carbonylation, advanced glycation end products and lipid peroxidation. We show further that the endosomal accumulation of oxidatively modified proteins interferes with the efficient processing of exogenous antigens and degradation of macroautophagy-delivered proteins. In support of a causative role for oxidized products in the inefficient immune response, a decrease in oxidative stress improved the adaptive immune response to immunizing antigens. These findings underscore a previously unrecognized negative effect of age-dependent changes in cellular proteostasis on the immune response.
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