Expression of 5-HT7 receptor mRNA in rat brain during postnatal development

The present study is the first one to demonstrate the expression of 5-HT7 receptor mRNA by in situ hybridization during postnatal development. No quantitative developmental changes in the 5-HT7 gene expression was observed in neocortex, pyramidal layers of CA1 and CA2, dentate gyrus, most of thalami...

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Bibliographic Details
Published in:Neuroscience letters 1997-05, Vol.227 (1), p.53-56
Main Authors: VIZUETE, M. L, VENERO, J. L, TRAIFFORT, E, VARGAS, C, MACHADO, A, CANO, J
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Brain - growth & development
Brain - metabolism
Development. Senescence. Regeneration. Transplantation
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Developmental - physiology
In Situ Hybridization
Male
Rats
Rats, Wistar
Receptors, Serotonin - genetics
RNA, Messenger - biosynthesis
Vertebrates: nervous system and sense organs
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Summary:The present study is the first one to demonstrate the expression of 5-HT7 receptor mRNA by in situ hybridization during postnatal development. No quantitative developmental changes in the 5-HT7 gene expression was observed in neocortex, pyramidal layers of CA1 and CA2, dentate gyrus, most of thalamic nuclei, mammillary region, superior colliculus and central gray. However, in retrosplenial cortex, subiculum and medial habenula an increase of labeling is observed between postnatal days (PN) PN15 and PN21. Striatum showed a transient expression during the first stages of development to be undetectable in adults. CA3 pyramidal cell layer, intramediodorsal thalamic nucleus and lateral habenula displayed a high mRNA expression at PN5 and PN8 which decreased throughout development but it was still present in adults. A possible non-neurotransmitter trophic function of 5-HT mediated through 5-HT7 receptors could be suggested.
ISSN:0304-3940
1872-7972
DOI:10.1016/s0304-3940(97)00302-9