| Vasotocin and hydrin 2 (vasotocinyl-Gly) in the African toad Bufo regularis: study under various environmental conditions. | |
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MedLine Citation:
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PMID: 8097151 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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1. The neurohypophysial osmoregulatory hormones of the African toad Bufo regularis, a species adapted to estivate under dry and hot conditions, have been investigated. Vasotocin and hydrin 2 (vasotocinyl-Gly) have been identified by their retention times in high-pressure reverse-phase liquid chromatography and coelution with synthetic peptides, their pharmacological properties (vasotocin) and microsequencing. 2. Vasotocin-associated neurophysin (MSEL-neurophysin type) has been characterized by its N-terminal amino acid sequence. 3. In toads subjected to dehydration by evaporation (20% weight loss) or to osmotic stress by immersion in 2% NaCl for 3 hr (6% weight loss), the molar ratio hydrin 2/vasotocin (about 2:1) remained similar to the one observed in control animals. 4. In toads exposed to saline solution, there was a large decrease (roughly 30%) in the amounts of both hormones in the neuro-hypophysis. Environmental conditions for distinct secretions of vasotocin and hydrin 2 remain to be found. |
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Authors:
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J Chauvet; Y Ouedraogo; G Michel; R Acher |
Publication Detail:
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Type: In Vitro; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Comparative biochemistry and physiology. Comparative physiology Volume: 104 ISSN: - ISO Abbreviation: Comp. Biochem. Physiol. Comp. Physiol. Publication Date: 1993 Mar |
Date Detail:
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Created Date: 1993-05-18 Completed Date: 1993-05-18 Revised Date: 2006-11-28 |
Medline Journal Info:
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Nlm Unique ID: 9441449 Medline TA: Comp Biochem Physiol Comp Physiol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 497-502 Citation Subset: IM |
Affiliation:
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Laboratory of Biological Chemistry, University of Paris, France. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Animals Arginine Vasopressin / metabolism Biological Assay Bufonidae Chromatography, High Pressure Liquid Dehydration / physiopathology Environment* Female Molecular Sequence Data Neurophysins / metabolism Osmolar Concentration Oxytocin* Pituitary Gland, Posterior / metabolism* Pregnancy Protein Precursors / metabolism Rats Spectrophotometry, Ultraviolet Vasotocin / analogs & derivatives*, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Neurophysins; 0/Protein Precursors; 113-79-1/Arginine Vasopressin; 122842-55-1/hydrin 2; 50-56-6/Oxytocin; 9034-50-8/Vasotocin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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