期刊
SCIENCE ADVANCES
卷 8, 期 17, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abm7012
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资金
- NCI Cancer Center Support grant [P30CA013330]
- National Institutes of Health SIG [1S10OD019961-01, 1S10OD023591-01]
- ERC [804418]
- Wallenberg Centre for Molecular and Translational Medicine at University of Gothenburg
- Swedish Research Council [2016/82]
- SSMF [S150086]
- National Institutes of Health [R01DK100525, P30DK020541]
- Knut and Alice Wallenberg Foundation
- European Research Council (ERC) [804418] Funding Source: European Research Council (ERC)
The immune checkpoint B7-H3 has been studied in the tumor microenvironment and immunotherapy, but its potential role in metabolism remains largely unknown. This study reveals that B7-H3 is highly expressed in adipose tissue, particularly in adipocyte progenitor cells, and it regulates the glycolytic and mitochondrial activity of these cells. Loss of B7-H3 leads to impaired oxidative metabolism and increased lipid accumulation in derived adipocytes. Knockout of B7-H3 in mice results in spontaneous obesity, metabolic dysfunction, and adipose tissue inflammation.
The immune checkpoint B7-H3 (CD276) is a member of the B7 family that has been studied in the tumor microenvironment and immunotherapy, but its potential role in metabolism remains largely unknown. Here, we show that B7-H3 is highly expressed in mouse and human adipose tissue at steady state, with the highest levels in adipocyte progenitor cells. B7-H3 is rapidly down-regulated upon the initiation of adipocyte differentiation. Combined RNA sequencing and metabolic studies reveal that B7-H3 stimulates glycolytic and mitochondria! activity of adipocyte progenitors. Loss of B7-H3 in progenitors results in impaired oxidative metabolism program and increased lipid accumulation in derived adipocytes. Consistent with these observations, mice knocked out for B7-H3 develop spontaneous obesity, metabolic dysfunction, and adipose tissue inflammation. Our results reveal an unexpected metabolic role for B7-H3 in adipose tissue and open potential new avenues for the treatment of metabolic diseases by targeting the B7-H3 pathway.
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