Cited by 601Hypothalamic control of reproductive hormonesNeuropeptides and Animal PhysiologyNeuroendocrine regulation and behavior

Neurokinin B and dynorphin A in kisspeptin neurons of the arcuate nucleus participate in generation of periodic oscillation of neural activity driving pulsatile gonadotropin-releasing hormone secretion in the goat

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Wakabayashi, Yoshihiro, Nakada, Tomoaki, Murata, Ken, Ohkura, Satoshi, Mogi, Kazutaka, Navarro, Victor M., Clifton, Donald K., Mori, Yuji +4 more·2010·The Journal of Neuroscience

Abstract

Gonadotropin-releasing hormone (GnRH) neurons in the basal forebrain are the final common pathway through which the brain regulates reproduction. GnRH secretion occurs in a pulsatile manner, and indirect evidence suggests the kisspeptin neurons in the arcuate nucleus (ARC) serve as the central pacemaker that drives pulsatile GnRH secretion. The purpose of this study was to investigate the possible coexpression of kisspeptin, neurokinin B (NKB), and dynorphin A (Dyn) in neurons of the ARC of the goat and evaluate their potential roles in generating GnRH pulses. Using double and triple labeling, we confirmed that all three neuropeptides are coexpressed in the same population of neurons. Using electrophysiological techniques to record multiple-unit activity (MUA) in the medial basal hypothalamus, we found that bursts of MUA occurred at regular intervals in ovariectomized animals and that these repetitive bursts (volleys) were invariably associated with discrete pulses of luteinizing hormone (LH) (and by inference GnRH). Moreover, the frequency of MUA volleys was reduced by gonadal steroids, suggesting that the volleys reflect the rhythmic discharge of steroid-sensitive neurons that regulate GnRH secretion. Finally, we observed that central administration of Dyn-inhibit MUA volleys and pulsatile LH secretion, whereas NKB induced MUA volleys. These observations are consistent with the hypothesis that kisspeptin neurons in the ARC drive pulsatile GnRH and LH secretion, and suggest that NKB and Dyn expressed in those neurons are involved in the process of generating the rhythmic discharge of kisspeptin.

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Crossref · 10.1523/jneurosci.5848-09.2010

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Authors
Wakabayashi, Y., Nakada, T., Murata, K., Ohkura, S., Mogi, K., Navarro, V. M., Clifton, D. K., Mori, Y., Tsukamura, H., Maeda, K.-I., Steiner, R. A., & Okamura, H.
Affiliations
  • Institute of Agrobiological Sciences (JP)
  • Nagoya University (JP)
  • University of Washington (US)
  • The University of Tokyo (JP)
Venue
The Journal of Neuroscience
Published
2010-02-24
Volume
30
Issue
8
Pages
3124-3132
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2045555035
Cited by
597
References
42
Citations by year
2026: 12 · 2025: 27 · 2024: 19 · 2023: 24 · 2022: 32 · 2021: 36 · 2020: 38 · 2019: 36 · 2018: 42 · 2017: 39 · 2016: 42 · 2015: 42 · 2014: 54 · 2013: 48 · 2012: 47
FWCI
58.30
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5u54hd012629-31)
  • National Institute of Child Health and Human Development
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD049651, U54-HD-12629, U54HD-012629)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
kisspeptin neurons, arcuate nucleus, neurokinin B, dynorphin A, pulsatile GnRH secretion, luteinizing hormone, multi-unit activity, goats, neuroendocrine regulation of reproduction
MeSH terms
Action Potentials, Animals, Arcuate Nucleus of Hypothalamus, Biological Clocks, Dynorphins, Electrophysiology, Female, Goats, Luteinizing Hormone, Gonadotropin-Releasing Hormone, Neurons, Neurosecretory Systems, Ovariectomy, Periodicity, Proteins, Reproduction, Gonadal Steroid Hormones, Neurokinin B, Tumor Suppressor Proteins, Estrous Cycle, Kisspeptins

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