ArticleHistochemistry and cell biology2019
Region-specific changes in brain kisspeptin receptor expression during estrogen depletion and the estrous cycle.
Article in Histochemistry and cell biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed, 7 citations in OpenAlex.
- Article
- Critical role of arcuate nucleus kisspeptin and Kiss1R in regulation of the ovine luteinizing hormone surge.Journal of neuroendocrinology · 2025Article
- Lesions of KNDy and Kiss1R Neurons in the Arcuate Nucleus Produce Different Effects on LH Pulse Patterns in Female Sheep.Endocrinology · 2023Article
- Identification of Brain Regions Activated by Sevoflurane and Propofol and Regional Changes in Gene Expression.Acta histochemica et cytochemica · 2022Article
- Lower FSH With Normal Fertility in Male Mice Lacking Gonadotroph Kisspeptin Receptor.Frontiers in physiology · 2022Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
Abstract
Kisspeptin acts as a potent neuropeptide regulator of reproduction through modulation of the hypothalamic-pituitary-gonadal axis. Previous studies revealed sex differences in brain expression patterns as well as regulation of expression by estrogen. Alternatively, sex differences and estrogen regulation of the kisspeptin receptor (encoded by Kiss1r) have not been examined at cellular resolution. In the current study, we examined whether Kiss1r mRNA expression also exhibits estrogen sensitivity and sex-dependent differences using in situ hybridization. We compared Kiss1r mRNA expression between ovariectomized (OVX) rats and estradiol (E2)-replenished OVX rats to examine estrogen sensitivity, and compared expression between gonadally intact male rats and female rats in diestrus or proestrus to examine sex differences. In OVX rats, E2 replenishment significantly reduced Kiss1r expression specifically in the hypothalamic arcuate nucleus (ARC). A difference in Kiss1r expression was also observed between diestrus and proestrus rats in the hypothalamic paraventricular nucleus (PVN), but not in the ARC. Thus, estrogen appears to have region- and context-specific effects on Kiss1r expression. However, immunostaining revealed minimal colocalization of estrogen receptor alpha (ERα) in Kiss1r-expressing neuronal populations of ARC and PVN, indicating indirect or ERα-independent regulation of Kiss1r expression. Surprisingly, unlike the kisspeptin ligand, no sexual dimorphisms were observed in either the brain distribution of Kiss1r expression or in the number of Kiss1r-expressing neurons within enriched brain nuclei. The current study reveals marked differences in regulation between kisspeptin and kisspeptin receptor, and provides an essential foundation for further study of kisspeptin signaling and function in reproduction.
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