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bioRxiv · 10.1101/2024.12.17.629058

Identification of PTGR2 inhibitors as a new therapy for diabetes and obesity

Chang, Y.-C.·Chuang, L.-M.
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Abstract

Peroxisome proliferator-activated receptor {gamma} (PPAR{gamma}) is a master transcriptional regulator of systemic insulin sensitivity and energy balance. The anti-diabetic drug thiazolidinediones (TZDs) are potent synthetic PPAR{gamma} ligands with undesirable side effects, including obesity, fluid retention, and osteoporosis. 15-keto prostaglandin E2 (15-keto-PGE2) is an endogenous PPAR{gamma} ligand metabolized by prostaglandin reductase 2 (PTGR2). Here, we confirmed that 15-keto-PGE2 binds and activates PPAR{gamma} via covalent binding. In patients with type 2 diabetes and obese mice, serum 15-keto-PGE2 levels were decreased. Administration of 15-keto-PGE2 improves glucose homeostasis and prevented diet-induced obesity in mice. Either genetic inhibition of PTGR2 or PTGR2 inhibitor BPRPT0245 protected mice from diet-induced obesity, insulin resistance, and hepatic steatosis without fluid retention and osteoporosis. In conclusion, inhibition of PTGR2 is a new therapeutic approach to treat diabetes and obesity through increasing endogenous PPAR{gamma} ligands without side effects of synthetic PPAR{gamma} ligands TZDs.

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Chang, Y.-C., Chuang, L.-M.. 2024-12-20. Identification of PTGR2 inhibitors as a new therapy for diabetes and obesity. https://doi.org/10.1101/2024.12.17.629058

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