Cytokine‐inducible SH2 domain containing protein contributes to regulation of adiposity, food intake, and glucose metabolism

• Published in: The FASEB journal Vol. 36; no. 5; pp. e22320 - n/a
• Main Authors: Naser, Wasan, Maymand, Saeed, Rivera, Leni R., Connor, Timothy, Liongue, Clifford, Smith, Craig M., Aston‐Mourney, Kathryn, McCulloch, Daniel R., McGee, Sean L., Ward, Alister C.
• Format: Journal Article
• Language: English
• Published: United States 01.05.2022
• Subjects: Adiposity; Agouti-Related Protein - genetics; Agouti-Related Protein - metabolism; Animals; appetite; CISH; cytokine; Cytokines - metabolism; Eating; Glucose - metabolism; leptin; Leptin - metabolism; Mice; Obesity - genetics; Obesity - metabolism; SOCS; src Homology Domains; Suppressor of Cytokine Signaling Proteins; cytokine; adiposity; CISH; SOCS; appetite; glucose metabolism; leptin
• ISSN: 0892-6638; 1530-6860
• DOI: 10.1096/fj.202101882R

The cytokine‐inducible SH2 domain containing protein (CISH) is the founding member of the suppressor of cytokine signaling (SOCS) family of negative feedback regulators and has been shown to be a physiological regulator of signaling in immune cells. This study sought to investigate novel functions for CISH outside of the immune system. Mice deficient in CISH were generated and analyzed using a range of metabolic and other parameters, including in response to a high fat diet and leptin administration. CISH knockout mice possessed decreased body fat and showed resistance to diet‐induced obesity. This was associated with reduced food intake, but unaltered energy expenditure and microbiota composition. CISH ablation resulted in reduced basal expression of the orexigenic Agrp gene in the arcuate nucleus (ARC) region of the brain. Cish was basally expressed in the ARC, with evidence of co‐expression with the leptin receptor (Lepr) gene in Agrp‐positive neurons. CISH‐deficient mice also showed enhanced leptin responsiveness, although Cish expression was not itself modulated by leptin. CISH‐deficient mice additionally exhibited improved insulin sensitivity on a high‐fat diet, but not glucose tolerance despite reduced body weight. These data identify CISH as an important regulator of homeostasis through impacts on appetite control, mediated at least in part by negative regulation of the anorexigenic effects of leptin, and impacts on glucose metabolism.