Distinct T cell subsets in adipose tissue are associated with obesity
Haugstøyl, Martha Eimstad; Cornillet, Martin; Strand, Kristina; Stiglund, Natalie; Sun, Dan; Lawrence-Archer, Laurence; Hjellestad, Iren Drange; Sparrelid, Ernesto; Busch, Christian; Hjelmesæth, Jøran Sture; Hertel, Jens Kristoffer; Ponzetta, Andrea; Mellgren, Gunnar; Fernø, Johan; Björkström, Niklas K.
Journal article, Peer reviewed
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Original versionEuropean Journal of Immunology, 2022. 10.1002/eji.202249990
Adipose tissue inflammation is a driving factor for the development of obesity-associated metabolic disturbances, and a role of adipose tissue T cells in initiating the pro-inflammatory signaling is emerging. However, data on human adipose tissue T cells in obesity are limited, reflected by the lack of phenotypic markers to define tissue-resident T cell subsets. In this study, we performed a deep characterization of T cells in blood and adipose tissue depots using multicolor flow cytometry and RNA sequencing. We identified distinct subsets of T cells associated with obesity expressing the activation markers, CD26 and CCR5, and obesity-specific genes that are potentially engaged in activating pro-inflammatory pathway, including ceramide signaling, autophagy, and IL-6 signaling. These findings increase our knowledge on the heterogeneity of T cells in adipose tissue and on subsets that may play a role in obesity-related pathogenesis.