| Autor: |
PINELLI, Claudia, D'ANIELLO B, FIORENTINO M, BHAT G, SAIDAPUR SK, RASTOGI RK |
| Přispěvatelé: |
Pinelli, Claudia, D'Aniello, B, Fiorentino, M, Bhat, G, Saidapur, Sk, Rastogi, Rk |
| Jazyk: |
angličtina |
| Rok vydání: |
1997 |
| Předmět: |
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| Popis: |
From a comparative viewpoint, we have investigated the presence and neuroanatomical distribution of gonadotropin-releasing hormone (GnRH)- immunoreactive material in the brain of a gymnophione amphibian, Ichthyophis beddomei. Immunocytochemical analysis of the adult brain and terminal nerves in both sexes shows the presence of neurons and fibers containing mammalian GnRH (mGnRH)- and chicken GnRH-II (cGnRH-II)-like peptides. With respect to GnRH-immunoreactive material, there are two distinct neuronal systems in the brain: one containing mGnRH, which is located in the forebrain and terminal nerve, and the other containing cGnRH-II, which is restricted to the midbrain tegmentum. Basically, this distribution pattern parallels that of many species of anurans and a urodele. Whereas the presence of cGnRH-II- immunoreactive fibers in the dorsal pallium of I. beddomei is a feature in common with a urodele amphibian, the total absence of cGnRH-II-like material in the median eminence is unique to this species. It is suggested here that the distribution profile of GnRH-like material within the brain and terminal nerve of I. beddomei represents a primitive pattern. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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