Adipose group 1 innate lymphoid cells promote adipose tissue fibrosis and diabetes in obesity.
Hongdong WangLei ShenXi-Tai SunFangcen LiuWenhuan FengChunping JiangXuehui ChuXiao YeCan JiangYan WangPengzi ZhangMengwei ZangDalong ZhuYan BiPublished in: Nature communications (2019)
Pathogenic factors driving obesity to type 2 diabetes (T2D) are not fully understood. Group 1 innate lymphoid cells (ILC1s) are effectors of innate immunity and enriched in inflamed tissues. Here we show that the number of adipose ILC1s increases in obese T2D patients and correlates with glycemic parameters and with the number of ILC1s in the blood; circulating ILC1 numbers decrease as a result of metabolic improvements after bariatric surgery. In vitro co-culture experiments show that human adipose ILC1s promote adipose fibrogenesis and CD11c+ macrophage activation. Reconstruction of the adipose ILC1 population in Prkdc-/-IL2rg-/- mice by adoptive transfer drives adipose fibrogenesis through activation of TGFβ1 signaling; however, transfer of Ifng-/- ILC1s has no effect on adipose fibrogenesis. Furthermore, inhibiting adipose accumulation of ILC1s using IL-12 neutralizing antibodies attenuates adipose tissue fibrosis and improves glycemic tolerance. Our data present insights into the mechanisms of local immune disturbances in obesity-related T2D.
Keyphrases
- adipose tissue
- insulin resistance
- type diabetes
- high fat diet induced
- nk cells
- high fat diet
- metabolic syndrome
- glycemic control
- weight loss
- cardiovascular disease
- induced apoptosis
- cell cycle arrest
- weight gain
- stem cells
- signaling pathway
- end stage renal disease
- bariatric surgery
- artificial intelligence
- body mass index
- electronic health record
- big data
- epithelial mesenchymal transition
- cell death
- patient reported