Project description:To identify transcripts enriched in ventomedial hypothalamus (VMH) neurons, we used translating affinity ribosome purification combined with RNA-seq (TRAP-seq) from Nr5a1-Cre mice.
Project description:To identify transcripts enriched in ventomedial hypothalamus (VMH) Lepr neurons, we used translating affinity ribosome purification combined with RNA-seq (TRAP-seq) from Lepr-Cre mice.
Project description:To identify transcripts enriched in ventomedial hypothalamus (VMH) neurons that contain both Lepr and Slc17a6, we used translating affinity ribosome purification combined with RNA-seq (TRAP-seq) from Lepr-Cre;Slc17a6-Flpo mice.
Project description:VMH was dissected from 16-week-old mice with deletion of SIRT1 in SF1 neurons (Sf1-Cre; Sirt1loxP/loxP) and intact controls (Sirt1loxP/loxP) and fed on high calorie diet from 8 weeks of age.
Project description:Background: Brain glucose-sensing neurons detect glucose fluctuations and prevent severe hypoglycemia, but mechanisms mediating functions of these glucose-sensing neurons are unclear. Methods: We combined mouse genetics, electrophysiology, neural tracing, optogenetics and Patch-RNA-seq to demonstrate how glucose-sensing neurons in the ventrolateral VMH regulate glucose balance. Results: Here we report that estrogen receptor-α (ERα)-expressing neurons in the ventrolateral subdivision of the ventromedial hypothalamic nucleus (vlVMH) are glucose-sensing neurons to a 5-1-5mM glucose fluctuation, being glucose-inhibited neurons (GI-ERαvlVMH) or glucose-excited neurons (GE-ERαvlVMH). Hypoglycemia activates GI-ERαvlVMH neurons via the anoctamin 4 channel, and inhibits GE-ERαvlVMH neurons through opening the ATP-sensitive potassium channel. Further, we show that GI-ERαvlVMH neurons preferentially project to the medioposterior arcuate nucleus of the hypothalamus (mpARH) and GE-ERαvlVMH neurons preferentially project to the dorsal Raphe nuclei (DRN). Activation of ERαvlVMH-mpARH circuit and inhibition of ERαvlVMH-DRN circuit both increase blood glucose. Conclusions: Our results indicate that ERαvlVMH neurons detect glucose fluctuations and prevent severe hypoglycemia in mice.
