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- Title
In Situ Hybridization Localization of TRH Precursor and TRH Receptor mRNAs in the Brain and Pituitary of Xenopus laevis.
- Authors
GALAS, L; BIDAUD, I; BULANT, M; JENKS, B G; OUWENS, D T W M; JÉGOU, S; LADRAM, A; ROUBOS, E W; NICOLAS, P; TONON, M C; VAUDRY, H
- Abstract
We examined the distribution of the mRNAs encoding proTRH and the three TRH receptor subtypes (xTRHR1, xTRHR2, and xTRHR3) in the Xenopus laevis CNS and pituitary. A positive correlation was generally observed between the expression patterns of proTRH and xTRHR mRNAs. xTRHRs were widely expressed in the telencephalon and diencephalon, where two or even three xTRHR mRNAs were often simultaneously observed within the same brain structures. In the pituitary, xTRHR2 was selectively expressed in the distal lobe, and xTRHR3 was found exclusively in the intermediate lobe of white background-adapted animals, indicating that, in amphibians, the effect of TRH on α-melanotropin (α-MSH) secretion from melanotrope cells is mediated through the novel receptor subtype xTRHR3.
- Subjects
XENOPUS laevis; IN situ hybridization; BRAIN research; PITUITARY gland; MSH (Hormone)
- Publication
Annals of the New York Academy of Sciences, 2005, Vol 1040, Issue 1, p95
- ISSN
0077-8923
- Publication type
Article
- DOI
10.1196/annals.1327.012