Bulk RNA Sequencing of sorted LepR+ Sympathetic Associated Perineurial Cells
Adipose tissues (ATs) are innervated by sympathetic nerves, which drive reduction of fat mass via lipolysis and thermogenesis. Here, we report a population of immunomodulatory leptin receptor (LepR)-expressing barrier cells which ensheath sympathetic axon bundles in adipose tissues. These LepR-expressing Sympathetic Perineurial Cells (SPCs) produce IL33, a factor for maintenance and recruitment of regulatory T cell (Treg) and eosinophils in AT. Brown adipose tissues (BAT) of mice lacking IL33 in SPCs (SPCIL33cKO) have fewer Treg and eosinophils, resulting in increased BAT inflammation. These SPCIL33cKO mice are more susceptible to diet-induced obesity, independently of food intake. Furthermore, SPCIL33cKO mice have impaired adaptive thermogenesis, and are unresponsive to leptin-induced rescue of metabolic adaptation. We, therefore, identify LepR-expressing SPCs as a source of IL33 which orchestrate an anti-inflammatory environment in BAT, preserving sympathetic-mediated thermogenesis and body weight homeostasis. LepR+ IL33+SPCs provide a cellular link between leptin and immune regulation of body weight, unifying neuroendocrinology and immunometabolism as previously disconnected fields of obesity research. Overall design: LepR+ cells from the Superior Cervical Ganglia of LepRCRE::Ai32 mice were sorted and sequenced. 3 biological replicates