SUMMARY Comprehensive transcriptional profiling of glucosesensing neurons is challenging because of low expression levels of glucokinase (Gck) and other key proteins that transduce a glucose signal. To overcome this, we generated and validated transgenic mice with a neuronal/endocrine-specific Gck promoter driving cre expression and mated them to mice with cre-dependent expression of an EGFPtagged ribosomal protein construct (EEF1A1-LSL. EGFPL10) that can be used to map and profile cells. We found significant Gck expression in hypothalamic and limbic regions in cells that are activated following administration of glucose or 2-deoxyglucose. Transcriptional profiling from Gck-cre/EEF1A1-LSL. EGFPL10 mice enriched known and previously unknown glucose-sensing populations including neurons expressing growth hormone releasing hormone (GHRH). Electrophysiological recordings show that hypoglycemia activates GHRH neurons, suggesting a mechanistic link between hypoglycemia and growth hormone release. These studies provide a means for mapping glucose-sensitive neurons and for generating transcriptional profiles from other cell types expressing cre in a cell-specific manner. ?? 2013 Elsevier Inc.
Stanley, S., Domingos, A. I., Kelly, L., Garfield, A., Damanpour, S., Heisler, L., & Friedman, J. (2013). Profiling of glucose-sensing neurons reveals that ghrh neurons are activated by hypoglycemia. Cell Metabolism, 18(4), 596-607. https://doi.org/10.1016/j.cmet.2013.09.002