Changes of Pituitary Proopiomelanocortin mRNA Levels during Metamorphosis of the Bullfrog Larvae

Aida, T; Iwamuro, Shawichi; Miura, Satoshi; Kikuyama, Sakaé

doi:10.2108/zsj.16.255

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…The TSH RIA system was developed using the antiserum raised against C-terminal peptide synthesized in accordance with the amino acid sequence deduced from the TSH β-subunit (TSH-β) cDNA (Okada et al, 2000(Okada et al, , 2004. It became possible to evaluate the hormonal levels and ascertain the role of pituitary hormones in metamorphosis using the RIA systems, along with the cDNA clones of PRL (Takahashi et al, 1990(Takahashi et al, , 1993, PRL receptor (PRLR) (Hasunuma et al, 2004), TSH-β (Okada et al, 2000), and proopiomelanocortin (Aida et al, 1999). Some unexpected findings encountered during the course of these studies are also reviewed in this article: Removal of the primordium of the adenohypophysis was often performed using B. japonicus embryos.…”

Section: Introductionmentioning

confidence: 99%

Hormonal and pheromonal studies on amphibians with special reference to metamorphosis and reproductive behavior

et al. 2023

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In this article, we review studies which have been conducted to investigate the hormonal influence on metamorphosis in bullfrog (Rana catesbeiana) and Japanese toad (Bufo japonicus) larvae, in addition to studies conducted on the hormonal and pheromonal control of reproductive behavior in red‐bellied newts (Cynops pyrrhogaster). Metamorphosis was studied with an emphasis on the roles of prolactin (PRL) and thyrotropin (TSH). The release of PRL was shown to be regulated by thyrotropin‐releasing hormone (TRH) and that of TSH was evidenced to be regulated by corticotropin‐releasing factor. The significance of the fact that the neuropeptide that controls the secretion of TSH is different from those encountered in mammals is discussed in consideration of the observation that the release of TRH, which stimulates the release of PRL, is enhanced when the animals are subjected to a cold temperature. Findings that were made by using melanin‐rich cells of Bufo embryos and larvae, such as the determination of the origin of the adenohypophyseal primordium, identification of the pancreatic chitinase, and involvement of the rostral preoptic recess organ as the hypothalamic inhibitory center of α‐melanocyte‐stimulating hormone (α‐MSH) secretion, are mentioned in this article. In addition, the involvement of hormones in eliciting courtship behavior in male red‐bellied newts and the discovery of the peptide sex pheromones and hormonal control of their secretion are also discussed in the present article.

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Section: Introductionmentioning

confidence: 99%

Hormonal and pheromonal studies on amphibians with special reference to metamorphosis and reproductive behavior

et al. 2023

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“…In this respect, a wealth of interesting data has been obtained in neuroendocrine research on amphibians, e.g. as to the plasticity of behavior (Denver, 1997), the identification of novel neuropeptides (Chartrel et al, 1999), their mechanisms of action (Montero et al, 2000;Yon et al, 2001), the structure and development of the hypothalamo-hypophyseal system (Jansen et al, 1997;Aida et al, 1999;Kikuyama et al, 1999) and pituitary cell heterogeneity (Gracia-Navarro et al, 1998;Gonzalez de Aguilar et al, 1999) (for refs, śee also Vaudry and Eberle, 1993;Vaudry et al, 1998).…”

Section: Introductionmentioning

confidence: 99%