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Kisspeptin Excitation of GnRH Neurons

  • Oline K. Rønnekleiv
  • Martin J. Kelly
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 784)

Abstract

Kisspeptin binding to its cognate G protein-coupled receptor (GPR54, aka Kiss1R) in gonadotropin-releasing hormone (GnRH) neurons stimulates peptide release and activation of the reproductive axis in mammals. Kisspeptin has pronounced pre- and postsynaptic effects, with the latter dominating the excitability of GnRH neurons. Presynaptically, kisspeptin increases the excitatory drive (both GABA-A and glutamate) to GnRH neurons and postsynaptically, kisspeptin inhibits an A-type and inwardly rectifying K+ (Kir 6.2 and GIRK) currents and activates nonselective cation (TRPC) currents to cause long-lasting depolarization and increased action potential firing. The signaling cascades and the multiple intracellular targets of kisspeptin actions in native GnRH neurons are continuing to be elucidated. This review summarizes our current state of knowledge about kisspeptin signaling in GnRH neurons.

Keywords

Arcuate Nucleus GnRH Neuron Canonical Transient Receptor Potential TRPC Channel Burst Firing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors thank current and past members of their laboratories who ­contributed to the work described herein, especially Drs. Chunguang Zhang, Jian Qiu, Yuan Fang, Troy Roepke, and Ms. Martha A. Bosch; also, special thanks to Ms. Martha A. Bosch for her skilled assistance with the illustrations and manuscript preparations. The work from the authors’ laboratories was supported by NIH grants NS43330, NS38809, DK68098.

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© Springer Science+Business Media, LLC 2013

Authors and Affiliations

  1. 1.Physiology and PharmacologyOregon Health and Science UniversityPortlandUSA

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