ArticlebioRxiv : the preprint server for biology2024
Comprehensive chemotyping, and the gonadal regulation, of seven kisspeptinergic neuronal populations in the mouse brain.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundKisspeptinergic signaling is well-established as crucial for regulation of reproduction, but its potential broader role in brain function is less understood. This study investigates the distribution and chemotyping of kisspeptin-expressing neurons within the mouse brain.
methodsRNAscope singleplex, duplex and multiplex in situ hybridization methods were used to assess kisspeptin mRNA (Kiss1) expression and its co-expression with other neuropeptides, excitatory and inhibitory neurotransmitter markers, and sex steroid receptors in intact and gonadectomized young adult mice.
resultsSeven distinct kisspeptin neuronal chemotypes were characterized, including within two novel Kiss1-expressing groups described here for the first time: the ventral premammillary nucleus, and the nucleus of the solitary tract. Kiss1 mRNA was also localized in the soma, and within the dendritic compartment, of hypothalamic neurons. Altered Kiss1 expression following gonadectomy suggests a previously unappreciated role for androgen receptors in regulating kisspeptin signaling.
conclusionThis study provides a detailed chemoanatomical map of kisspeptin-expressing neurons in the brain, highlighting their potential functional diversity. The discovery of new kisspeptin-expressing neuronal populations, and gonadectomy-induced changes in Kiss1 expression patterns, provide a basis for further exploration of non-endocrine roles for kisspeptin in brain function.
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