PUBLICATION
Distribution of Kiss2 receptor in the brain and its localization in neuroendocrine cells in the zebrafish
- Authors
- Ogawa, S., Sivalingam, M., Anthonysamy, R., Parhar, I.S.
- ID
- ZDB-PUB-190902-22
- Date
- 2019
- Source
- Cell and tissue research 379(2): 349-372 (Journal)
- Registered Authors
- Ogawa, Satoshi
- Keywords
- GPR54, GnRH, Kisspeptin, Reproduction, Teleost
- MeSH Terms
-
- Animals
- Brain/metabolism*
- Cell Body/metabolism
- Female
- Gonadotropin-Releasing Hormone/metabolism
- Male
- Neuroendocrine Cells/metabolism*
- Neurons/metabolism
- Neuropeptides/metabolism
- Pituitary Gland/metabolism
- Protein Transport
- Pyrrolidonecarboxylic Acid/analogs & derivatives
- Pyrrolidonecarboxylic Acid/metabolism
- Zebrafish/metabolism*
- Zebrafish Proteins/metabolism*
- PubMed
- 31471710 Full text @ Cell Tissue Res.
Citation
Ogawa, S., Sivalingam, M., Anthonysamy, R., Parhar, I.S. (2019) Distribution of Kiss2 receptor in the brain and its localization in neuroendocrine cells in the zebrafish. Cell and tissue research. 379(2):349-372.
Abstract
Kisspeptin is a hypothalamic neuropeptide, which acts directly on gonadotropin-releasing hormone (GnRH)-secreting neurons via its cognate receptor (GPR54 or Kiss-R) to stimulate GnRH secretion in mammals. In non-mammalian vertebrates, there are multiple kisspeptins (Kiss1 and Kiss2) and Kiss-R types. Recent gene knockout studies have demonstrated that fish kisspeptin systems are not essential in the regulation of reproduction. Studying the detailed distribution of kisspeptin receptor in the brain and pituitary is important for understanding the multiple action sites and potential functions of the kisspeptin system. In the present study, we generated a specific antibody against zebrafish Kiss2-R (=Kiss1Ra/GPR54-1/Kiss-R2/KissR3) and examined its distribution in the brain and pituitary. Kiss2-R-immunoreactive cell bodies are widely distributed in the brain including in the dorsal telencephalon, preoptic area, hypothalamus, optic tectum, and in the hindbrain regions. Double-labeling showed that not all but a subset of preoptic GnRH3 neurons expresses Kiss2-R, while Kiss2-R is expressed in most of the olfactory GnRH3 neurons. In the posterior preoptic region, Kiss2-R immunoreactivity was seen in vasotocin cells. In the pituitary, Kiss2-R immunoreactivity was seen in corticotropes, but not in gonadotropes. The results in this study suggest that Kiss2 and Kiss2-R signaling directly serve non-reproductive functions and indirectly subserve reproductive functions in teleosts.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping