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Humic acid reduces gonadotropin activity and hormonal sensitivity of frog oocytes.

Identifieur interne : 000505 ( PubMed/Checkpoint ); précédent : 000504; suivant : 000506

Humic acid reduces gonadotropin activity and hormonal sensitivity of frog oocytes.

Auteurs : H. Zenkevics [Lettonie] ; M. Klavins ; V. Vose ; A. Bucena

Source :

Aquatic toxicology (Amsterdam, Netherlands) [ 0166-445X ] ; 2005.

RBID : pubmed:16216349

English descriptors

KwdEn :
- Animals, Dose-Response Relationship, Drug, Fishes (metabolism), Fresh Water, Gonadotropins (antagonists & inhibitors), Gonadotropins (metabolism), Humic Substances (toxicity), Oocytes (cytology), Oocytes (drug effects), Oocytes (metabolism), Rana temporaria (metabolism), Reproduction (drug effects).
MESH :
- chemical , antagonists & inhibitors : Gonadotropins.
- cytology : Oocytes.
- drug effects : Oocytes, Reproduction.
- metabolism : Fishes, Gonadotropins, Oocytes, Rana temporaria.
- chemical , toxicity : Humic Substances.
- Animals, Dose-Response Relationship, Drug, Fresh Water.

Abstract

The specific stimulatory effect of sturgeon Acipenser güldenstädti Br. gonadotropic hormone (GTH) on frog Rana temporaria L. oocyte maturation in vitro was investigated in relation to humic acid (HA) concentrations from 12.5 to 50 mg/l. HA was observed to bind to both the follicular membrane of the oocytes and the GTH molecule, reducing the oocytes' hormone sensitivity and maturation ability. It was also shown that HA inactivated GTH, lowering its specific ability to stimulate oocyte maturation.

DOI: 10.1016/j.aquatox.2005.09.001
PubMed: 16216349

Affiliations:

Lettonie

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pubmed:16216349

Le document en format XML

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<front><div type="abstract" xml:lang="en">The specific stimulatory effect of sturgeon Acipenser güldenstädti Br. gonadotropic hormone (GTH) on frog Rana temporaria L. oocyte maturation in vitro was investigated in relation to humic acid (HA) concentrations from 12.5 to 50 mg/l. HA was observed to bind to both the follicular membrane of the oocytes and the GTH molecule, reducing the oocytes' hormone sensitivity and maturation ability. It was also shown that HA inactivated GTH, lowering its specific ability to stimulate oocyte maturation.</div>
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Humic acid reduces gonadotropin activity and hormonal sensitivity of frog oocytes.

Humic acid reduces gonadotropin activity and hormonal sensitivity of frog oocytes.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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Pour générer des pages wiki