This is the resubmission of the first competitive renewal of R01DK074970 """"""""Role of estrogen receptors in beta- cell survival and insulin secretion"""""""". Our laboratory was a pioneer in demonstrating that the female hormone 17?-estradiol (E2) protects islet ?-cells from apoptosis in vivo in mice. We have shown that E2 anti-apoptotic protection is mediated via extranuclear estrogen receptor (ER)s. We also reported that activation of these ERs enhances islet insulin biosynthesis and prevents islet lipotoxicity in vivo thus preventing ?-cell failure in rodent models of type 2 diabetes. This competitive renewal focuses on the role of ERs in pancreatic islet engraftment during transplantation in insulin deficient diabetes. Pancreatic islet transplantation (PIT) is an important therapeutic approach in type 1 diabetes (T1D). However, the failure of islet revascularization and engraftment limits its widespread application. The transplanted islets exposed to multiple insults may be destroyed before revascularization occurs. Our new preliminary data suggest that ER activation permanently improves human islet engraftment during PIT in a mouse model of T1D via multiple mechanisms involving an acute suppression of islet graft hypoxia and apoptosis and an acute suppression of hyperglucagonemia. This is associated to a latter increase in islet revascularization and functional mass. In this application we propose to explore the contributions of the ER? in graft ?-cells, recipient ?-cells and endothelial cells to islet revascularization during PIT, using mice with conditional null alleles of ER? in these cells. We also propose to explore the synergy between estrogen and glucagon-like peptide-1 (GLP-1) in human islet survival and revascularization in a diabetic mouse model of PIT using a novel compound combining E2 and GLP-1 in a single molecule which allows the targeting of E2 where membrane GLP-1 receptors are present, the ?-cells and the endothelial cells, and away from gynecological tissues.
The research proposed in this grant will have a significant impact because when successfully completed it will provide a rapidly available therapeutic alternative to improve pancreatic islet engraftment in type 1 diabetic patients.
|Song, Jingwen; Yang, Yunzhong; Mauvais-Jarvis, Franck et al. (2017) KCNJ11, ABCC8 and TCF7L2 polymorphisms and the response to sulfonylurea treatment in patients with type 2 diabetes: a bioinformatics assessment. BMC Med Genet 18:64|
|Xu, Beibei; Lovre, Dragana; Mauvais-Jarvis, Franck (2017) The effect of selective estrogen receptor modulators on type 2 diabetes onset in women: Basic and clinical insights. J Diabetes Complications 31:773-779|
|Mauvais-Jarvis, Franck (2017) Gender differences in glucose homeostasis and diabetes. Physiol Behav :|
|Mauvais-Jarvis, Franck; Arnold, Arthur P; Reue, Karen (2017) A Guide for the Design of Pre-clinical Studies on Sex Differences in Metabolism. Cell Metab 25:1216-1230|
|Xu, Weiwei; Niu, Tianhua; Xu, Beibei et al. (2017) Androgen receptor-deficient islet ?-cells exhibit alteration in genetic markers of insulin secretion and inflammation. A transcriptome analysis in the male mouse. J Diabetes Complications 31:787-795|
|Mauvais-Jarvis, Franck (2017) New Insights Into Estrogens Inactivation and Prevention of Systemic Inflammation in Male Subjects. Endocrinology 158:3711-3712|
|Mauvais-Jarvis, Franck; Manson, JoAnn E; Stevenson, John C et al. (2017) Menopausal Hormone Therapy and Type 2 Diabetes Prevention: Evidence, Mechanisms, and Clinical Implications. Endocr Rev 38:173-188|
|Dong, Shengli; Baranwal, Somesh; Garcia, Anapatricia et al. (2017) Nischarin inhibition alters energy metabolism by activating AMP-activated protein kinase. J Biol Chem 292:16833-16846|
|Morford, Jamie J; Wu, Sheng; Mauvais-Jarvis, Franck (2017) The impact of androgen actions in neurons on metabolic health and disease. Mol Cell Endocrinol :|
|Mauvais-Jarvis, Franck (2016) Role of Sex Steroids in ? Cell Function, Growth, and Survival. Trends Endocrinol Metab 27:844-855|
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