Functionally distinct POMC-expressing neuron subpopulations in hypothalamus revealed by intersectional targeting
Nasim Biglari, Isabella Gaziano, Jonas Schumacher, Jan Radermacher, Lars Paeger, Paul Klemm, Weiyi Chen, Svenja Corneliussen, Claudia M. Wunderlich, Michael Sué, Stefan Vollmar, Tim Klöckener, Tamara Sotelo-Hitschfeld, Amin Abbasloo, Frank Edenhofer, Frank Reimann, Fiona M. Gribble, Henning Fenselau, Peter Kloppenburg, F. Thomas Wunderlich, Jens C. Brüning
Abstract
Abstract Pro-opiomelanocortin (POMC)-expressing neurons in the arcuate nucleus of the hypothalamus represent key regulators of metabolic homeostasis. Electrophysiological and single-cell sequencing experiments have revealed a remarkable degree of heterogeneity of these neurons. However, the exact molecular basis and functional consequences of this heterogeneity have not yet been addressed. Here, we have developed new mouse models in which intersectional Cre/Dre-dependent recombination allowed for successful labeling, translational profiling and functional characterization of distinct POMC neurons expressing the leptin receptor ( Lepr ) and glucagon like peptide 1 receptor ( Glp1r ). Our experiments reveal that POMC Lepr+ and POMC Glp1r+ neurons represent largely nonoverlapping subpopulations with distinct basic electrophysiological properties. They exhibit a specific anatomical distribution within the arcuate nucleus and differentially express receptors for energy-state communicating hormones and neurotransmitters. Finally, we identify a differential ability of these subpopulations to suppress feeding. Collectively, we reveal a notably distinct functional microarchitecture of critical metabolism-regulatory neurons.