Abstract:
:Intracellular metabolic programs tightly regulate the functions of macrophages, and previous studies have shown that serine mainly shapes the macrophage function via one-carbon metabolism. However, it is unknown whether serine modulates the macrophage function independent of one-carbon metabolism. Here, we find that serine deprivation lowers interleukin (IL)-1β production and inflammasome activation, as well as reprograms the transcriptomic and metabolic profile in M1 macrophages. Intriguingly, supplementation of formate, glycine, dNTPs, and glucose cannot rescue the production of IL-1β from serine-deprived macrophages. Mechanistically, serine deprivation inhibits macrophage IL-1β production through inhibition of mechanistic target of rapamycin (mTOR) signaling. Of note, the macrophages from mice feeding serine-free diet have lower IL-1β production, and these mice also show less inflammation after LPS challenge. Collectively, our data highlight a new regulatory mechanism for serine to modulate the macrophage function.
journal_name
Front Immunoljournal_title
Frontiers in immunologyauthors
Chen S,Xia Y,He F,Fu J,Xin Z,Deng B,He L,Zhou X,Ren Wdoi
10.3389/fimmu.2020.01866subject
Has Abstractpub_date
2020-08-27 00:00:00pages
1866issn
1664-3224journal_volume
11pub_type
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