Functional Identification of a Neurocircuit Regulating Blood Glucose

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2016 Mar 23

PMID 27001850

Citations 107

Authors

Thomas H Meek

Jarrell T Nelson

Miles E Matsen

Mauricio D Dorfman

Stephan J Guyenet

Vincent Damian

Margaret B Allison

Jarrad M Scarlett

Hong T Nguyen

Joshua P Thaler

David P Olson

Martin G Myers Jr

Michael W Schwartz

Gregory J Morton

Affiliations

Soon will be listed here.

Abstract

Previous studies implicate the hypothalamic ventromedial nucleus (VMN) in glycemic control. Here, we report that selective inhibition of the subset of VMN neurons that express the transcription factor steroidogenic-factor 1 (VMN(SF1) neurons) blocks recovery from insulin-induced hypoglycemia whereas, conversely, activation of VMN(SF1) neurons causes diabetes-range hyperglycemia. Moreover, this hyperglycemic response is reproduced by selective activation of VMN(SF1) fibers projecting to the anterior bed nucleus of the stria terminalis (aBNST), but not to other brain areas innervated by VMN(SF1) neurons. We also report that neurons in the lateral parabrachial nucleus (LPBN), a brain area that is also implicated in the response to hypoglycemia, make synaptic connections with the specific subset of glucoregulatory VMN(SF1) neurons that project to the aBNST. These results collectively establish a physiological role in glucose homeostasis for VMN(SF1) neurons and suggest that these neurons are part of an ascending glucoregulatory LPBN→VMN(SF1)→aBNST neurocircuit.

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