miR-350-3p Contributes to Age-Associated Impairment of IL-6 Production by Macrophages.

Authors: Wang X, Chang H, Yang S Abstract Aging-associated dysfunction of the immune system contributes to the increase in pathophysiological processes that occur with age. Numerous studies have shown that microRNAs regulate immune responses, although their role in age-related macrophage dysfunction remains elusive. Here, we found that miR-350-3p is expressed at lower levels in peritoneal macrophages from aged mice compared with young mice, and that lipopolysaccharide (LPS) stimulation downregulates miR-350-3p expression to a greater extent in young macrophages compared with aged macrophages. Consequently, LPS-stimulated aged macrophages express more miR-350-3p than do similarly treated young macrophages. Luciferase reporter assays showed that interleukin (IL)-6 mRNA is a miR-350-3...

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