Cited by 243Hypothalamic control of reproductive hormonesRegulation of Appetite and ObesityNeuropeptides and Animal Physiology

Kisspeptin Directly Excites Anorexigenic Proopiomelanocortin Neurons but Inhibits Orexigenic Neuropeptide Y Cells by an Indirect Synaptic Mechanism

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Fu, Li-Ying, van den Pol, Anthony N.·2010·The Journal of Neuroscience

Abstract

The neuropeptide kisspeptin is necessary for reproduction, fertility, and puberty. Here, we show strong kisspeptin innervation of hypothalamic anorexigenic proopiomelanocortin (POMC) cells, coupled with a robust direct excitatory response by POMC neurons ( n > 200) to kisspeptin, mediated by mechanisms based on activation of a sodium/calcium exchanger and possibly opening of nonselective cation channels. The excitatory actions of kisspeptin on POMC cells were corroborated with quantitative PCR data showing kisspeptin receptor GPR54 expression in the arcuate nucleus, and the attenuation of excitation by the selective kisspeptin receptor antagonist, peptide 234. In contrast, kisspeptin inhibits orexigenic neuropeptide Y (NPY) neurons through an indirect mechanism based on enhancing GABA-mediated inhibitory synaptic tone. In striking contrast, gonadotropin-inhibiting hormone (GnIH and RFRP-3) and NPY, also found in axons abutting POMC cells, inhibit POMC cells and attenuate the kisspeptin excitation by a mechanism based on opening potassium channels. Together, these data suggest that the two central peptides that regulate reproduction, kisspeptin and GnIH, exert a strong direct action on POMC neurons. POMC cells may hypothetically serve as a conditional relay station downstream of kisspeptin and GnIH to signal the availability of energy resources relevant to reproduction.

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Crossref · 10.1523/jneurosci.2098-10.2010

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  • RFRP-3 inhibits firing of some GnRH and ARC kisspeptin neurons, suggesting it may inhibit reproduction partly by signaling to these populations.

    “RFRP-3 has been functionally shown to inhibit the electrical firing of some GnRH and ARC kisspeptin neurons11–13 suggesting that RFRP-3 may inhibit the reproductive axis, in part, by signaling to kisspeptin and/or GnRH populations.”

    From Emerging insights into hypothalamic‐pituitary‐gonadal axis regulation and interaction with stress signalling (2018) · cites this paper as [11]

    The Introduction reports that GnIH hyperpolarizes GnRH neurons, and the Results identify RFRP-3 as its mammalian analog. The Results show RFRP-3 reducing firing in arcuate POMC neurons, not ARC kisspeptin neurons; the paper does not report RFRP-3 inhibiting kisspeptin-neuron firing or signaling to that population. Page numbers were not available in our copy. (LLM, conf=0.84)

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Authors
Fu, L.-Y., & van den Pol, A. N.
Venue
The Journal of Neuroscience
Published
2010-07-28
Volume
30
Issue
30
Pages
10205-10219
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2005121205
Cited by
243
References
92
Citations by year
2026: 4 · 2025: 10 · 2024: 5 · 2023: 11 · 2022: 16 · 2021: 22 · 2020: 18 · 2019: 17 · 2018: 21 · 2017: 14 · 2016: 22 · 2015: 17 · 2014: 14 · 2013: 22 · 2012: 12
FWCI
19.73
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK084052)
  • National Institute of Neurological Disorders and Stroke (R01NS048476, NS 41454, R01NS041454, NS48476, NS 34887, R01NS034887)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
kisspeptin, proopiomelanocortin neurons, neuropeptide Y neurons, hypothalamus, arcuate nucleus, Na+/Ca2+ exchanger, GABAergic inhibition, gonadotropin-inhibiting hormone, RFRP-3, potassium channels, appetite regulation, reproduction, energy homeostasis
MeSH terms
Receptors, Kisspeptin-1, Animals, Arcuate Nucleus of Hypothalamus, Axons, Calcium Channel Blockers, Chelating Agents, Dose-Response Relationship, Drug, Egtazic Acid, Female, Gene Expression Regulation, Imidazoles, Male, Membrane Potentials, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Neuropeptide Y, Pro-Opiomelanocortin, RNA, Messenger, Thiourea, Patch-Clamp Techniques, Excitatory Amino Acid Agonists, Excitatory Amino Acid Antagonists, 6-Cyano-7-nitroquinoxaline-2,3-dione, Excitatory Postsynaptic Potentials, Sodium-Calcium Exchanger, Tumor Suppressor Proteins, Receptors, G-Protein-Coupled, Renilla, Green Fluorescent Proteins, Mice, Kisspeptins, In Vitro Techniques

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