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西亚试剂:Glucose and Weight Control in Mice with a Designed Ghrelin

发布时间:2025-05-15

Glucose and Weight Control in Mice with a Designed Ghrelin O-Acyltransferase Inhibitor
Brad P. Barnett1,2,*, Yousang Hwang1,*, Martin S. Taylor1,2,*, Henriette Kirchner3, Paul T. Pfluger3, Vincent Bernard2, Yu-yi Lin2,6, Erin M. Bowers1, Chandrani Mukherjee1, Woo-Jin Song4, Patti A. Longo5, Daniel J. Leahy5, Mehboob A. Hussain4, Matthias H. Tsch?p3, Jef D. Boeke2,? and Philip A. Cole1,??

1Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
2Department of Molecular Biology and Genetics and High Throughput Biology Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
3Obesity Research Center, Metabolic Diseases Institute, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45237, USA.
4Metabolism Division, Departments of Pediatrics and Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
5Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
6Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei 100, Taiwan.

Ghrelin is a gastric peptide hormone that stimulates weight gain in vertebrates. The biological activities of ghrelin require octanoylation of the peptide on Ser3, an unusual posttranslational modification that is catalyzed by the enzyme ghrelin O-acyltransferase (GOAT). Here, we describe the design, synthesis, and characterization of GO-CoA-Tat, a peptide-based bisubstrate analog that antagonizes GOAT. GO-CoA-Tat potently inhibits GOAT in vitro, in cultured cells, and in mice. Intraperitoneal administration of GO-CoA-Tat improves glucose tolerance and reduces weight gain in wild-type mice but not in ghrelin-deficient mice, supporting the concept that its beneficial metabolic effects are due specifically to GOAT inhibition. In addition to serving as a research tool for mapping ghrelin actions, GO-CoA-Tat may help pave the way for clinical targeting of GOAT in metabolic diseases.

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