The roles of follicular envelopes in the initiation of Xenopus oocyte maturation
Identifieur interne : 001411 ( Istex/Checkpoint ); précédent : 001410; suivant : 001412The roles of follicular envelopes in the initiation of Xenopus oocyte maturation
Auteurs : Odile Mulner [France] ; René Ozon [France]Source :
- General and Comparative Endocrinology [ 0016-6480 ] ; 1981.
Abstract
Gonadotropins and progesterone induce in vitro meiotic maturation of the follicleenclosed Xenopus laevis oocyte. The kinetics of maturation are identical for both hormones. The enzymatic removal of the follicular envelopes which suppresses gonadotropin activity does not modify the efficiency of progesterone (1 μM)-induced maturation. It was, however, shown that defolliculation decreases the kinetic of maturation: GVBD50 (the time necessary to obtain 50% of germinal vesicle breakdown or maturation) was 8.08 ± 1.25 hr when follicles are induced to mature in the presence of progesterone and 4.30 ± 0.89 hr in the case of defolliculated oocytes. This result demonstrates that the follicular envelopes play a role in inhibition of steroid-induced maturation. When oocytes are defolliculated in the presence of aminogluthetimide, an inhibitor of steroid synthesis, the kinetic of oocyte maturation is also decreased (GVBD50: 4.98 ± 1.75 hr) indicating that the biosynthesis of steroid at the level of follicular envelopes is not involved in the phenomenon.
Url:
DOI: 10.1016/0016-6480(81)90010-1
Affiliations:
Links toward previous steps (curation, corpus...)
Links to Exploration step
ISTEX:7C67332F8B517365D2D14F2C7C7A7476DE48617CLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>The roles of follicular envelopes in the initiation of Xenopus oocyte maturation</title><author><name sortKey="Mulner, Odile" sort="Mulner, Odile" uniqKey="Mulner O" first="Odile" last="Mulner">Odile Mulner</name></author><author><name sortKey="Ozon, Rene" sort="Ozon, Rene" uniqKey="Ozon R" first="René" last="Ozon">René Ozon</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:7C67332F8B517365D2D14F2C7C7A7476DE48617C</idno><date when="1981" year="1981">1981</date><idno type="doi">10.1016/0016-6480(81)90010-1</idno><idno type="url">https://api.istex.fr/document/7C67332F8B517365D2D14F2C7C7A7476DE48617C/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000816</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000816</idno><idno type="wicri:Area/Istex/Curation">000814</idno><idno type="wicri:Area/Istex/Checkpoint">001411</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001411</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">The roles of follicular envelopes in the initiation of Xenopus oocyte maturation</title><author><name sortKey="Mulner, Odile" sort="Mulner, Odile" uniqKey="Mulner O" first="Odile" last="Mulner">Odile Mulner</name><affiliation wicri:level="4"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Physiologie de la Reproduction, Groupe Stéroïdes, Equipe de Recherche Associée au CNRS 694, Université Pierre et Marie Curie, 9, Quai Saint Bernard, 75005 Paris</wicri:regionArea><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Ozon, Rene" sort="Ozon, Rene" uniqKey="Ozon R" first="René" last="Ozon">René Ozon</name><affiliation wicri:level="4"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Physiologie de la Reproduction, Groupe Stéroïdes, Equipe de Recherche Associée au CNRS 694, Université Pierre et Marie Curie, 9, Quai Saint Bernard, 75005 Paris</wicri:regionArea><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">General and Comparative Endocrinology</title><title level="j" type="abbrev">YGCEN</title><idno type="ISSN">0016-6480</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1981">1981</date><biblScope unit="volume">44</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="335">335</biblScope><biblScope unit="page" to="343">343</biblScope></imprint><idno type="ISSN">0016-6480</idno></series><idno type="istex">7C67332F8B517365D2D14F2C7C7A7476DE48617C</idno><idno type="DOI">10.1016/0016-6480(81)90010-1</idno><idno type="PII">0016-6480(81)90010-1</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0016-6480</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Gonadotropins and progesterone induce in vitro meiotic maturation of the follicleenclosed Xenopus laevis oocyte. The kinetics of maturation are identical for both hormones. The enzymatic removal of the follicular envelopes which suppresses gonadotropin activity does not modify the efficiency of progesterone (1 μM)-induced maturation. It was, however, shown that defolliculation decreases the kinetic of maturation: GVBD50 (the time necessary to obtain 50% of germinal vesicle breakdown or maturation) was 8.08 ± 1.25 hr when follicles are induced to mature in the presence of progesterone and 4.30 ± 0.89 hr in the case of defolliculated oocytes. This result demonstrates that the follicular envelopes play a role in inhibition of steroid-induced maturation. When oocytes are defolliculated in the presence of aminogluthetimide, an inhibitor of steroid synthesis, the kinetic of oocyte maturation is also decreased (GVBD50: 4.98 ± 1.75 hr) indicating that the biosynthesis of steroid at the level of follicular envelopes is not involved in the phenomenon.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Paris</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Mulner, Odile" sort="Mulner, Odile" uniqKey="Mulner O" first="Odile" last="Mulner">Odile Mulner</name></region><name sortKey="Ozon, Rene" sort="Ozon, Rene" uniqKey="Ozon R" first="René" last="Ozon">René Ozon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/EsturgeonV1/Data/Istex/Checkpoint
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001411 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Checkpoint/biblio.hfd -nk 001411 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Eau
|area= EsturgeonV1
|flux= Istex
|étape= Checkpoint
|type= RBID
|clé= ISTEX:7C67332F8B517365D2D14F2C7C7A7476DE48617C
|texte= The roles of follicular envelopes in the initiation of Xenopus oocyte maturation
}}
| This area was generated with Dilib version V0.6.27. |  |