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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
22/03/2005 |
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Data da última atualização: |
10/06/2011 |
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Autoria: |
RODRIGUEZ-PIÑÓN, M.; TASENDE, C.; MEIKLE, A.; GARÓFALO, E. G. |
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Título: |
Estrogen and progesterone receptors in the ovine cervix during the postpartum period. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Theriogenology, v. 53, n. 3, p. 743-750, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Cervical estrogen (E) and progesterone (P) receptors were characterized and quantified during the postpartum period in Corriedale ewes lambing in the late breeding season. Cervices and uteri were collected after ovariohystcrectomy at 1 d (n=2), 5 d (n=4), 17 d (n=2) or 30 d (n=2) post partum. The estrogen and progesterone rcceptors were measured using binding a says with tritiated hormones, dextran charcoal separation and inverse Scatchard analysis. Similar kinetic parameters in cytosolic binding sites for both hormones were found in ali cervical and uterine Samples, indicating that the binding protein in both tissues is of the same nature. Receptor concentrations (fmoVmg cytosolic protein) in the cervix of early (1 to 5 d, n=6) and late (17 to 30 d, n=4) postpartum ewes were 348+66 vs 994+145 (P<0.05) for E and 618+126 vs ll70+201 (P<0.05) for P, respectively. These data suggest an increased synthesis of receptors, probably due to the presence of ovarian estrogen-active follicles. Cervical E and Preceptor concentrations were similar or higher than those in lhe uterus(1.40+0.15, n=10 and 1.51l+0.19, n=10; for E and P respectively), and these receptor ratios did not differ between the early and Iate postpartum período. The high ratio between cervical/uterine receptors suggests that the ovine cervix may be a very sensitive to steroid action. ln conclusion, it was shown that restoration of steroid receptors during the postpartum period in the ovine cervix is similar to receptor dynamics in the uterus, and is probably associated with the recovery of ovarian cyclicity. MenosCervical estrogen (E) and progesterone (P) receptors were characterized and quantified during the postpartum period in Corriedale ewes lambing in the late breeding season. Cervices and uteri were collected after ovariohystcrectomy at 1 d (n=2), 5 d (n=4), 17 d (n=2) or 30 d (n=2) post partum. The estrogen and progesterone rcceptors were measured using binding a says with tritiated hormones, dextran charcoal separation and inverse Scatchard analysis. Similar kinetic parameters in cytosolic binding sites for both hormones were found in ali cervical and uterine Samples, indicating that the binding protein in both tissues is of the same nature. Receptor concentrations (fmoVmg cytosolic protein) in the cervix of early (1 to 5 d, n=6) and late (17 to 30 d, n=4) postpartum ewes were 348+66 vs 994+145 (P<0.05) for E and 618+126 vs ll70+201 (P<0.05) for P, respectively. These data suggest an increased synthesis of receptors, probably due to the presence of ovarian estrogen-active follicles. Cervical E and Preceptor concentrations were similar or higher than those in lhe uterus(1.40+0.15, n=10 and 1.51l+0.19, n=10; for E and P respectively), and these receptor ratios did not differ between the early and Iate postpartum período. The high ratio between cervical/uterine receptors suggests that the ovine cervix may be a very sensitive to steroid action. ln conclusion, it was shown that restoration of steroid receptors during the postpartum period in the ovine cervix is similar to receptor... Mostrar Tudo |
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Palavras-Chave: |
Atividade ovariana. |
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Thesagro: |
Endocrinologia; Estrógeno; Ovelha; Ovino; Pós-Parto; Progesterona; Reprodução Animal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02276naa a2200253 a 4500
001 1531002
005 2011-06-10
008 2000 bl uuuu u00u1 u #d
100 1 $aRODRIGUEZ-PIÑÓN, M.
245 $aEstrogen and progesterone receptors in the ovine cervix during the postpartum period.
260 $c2000
520 $aCervical estrogen (E) and progesterone (P) receptors were characterized and quantified during the postpartum period in Corriedale ewes lambing in the late breeding season. Cervices and uteri were collected after ovariohystcrectomy at 1 d (n=2), 5 d (n=4), 17 d (n=2) or 30 d (n=2) post partum. The estrogen and progesterone rcceptors were measured using binding a says with tritiated hormones, dextran charcoal separation and inverse Scatchard analysis. Similar kinetic parameters in cytosolic binding sites for both hormones were found in ali cervical and uterine Samples, indicating that the binding protein in both tissues is of the same nature. Receptor concentrations (fmoVmg cytosolic protein) in the cervix of early (1 to 5 d, n=6) and late (17 to 30 d, n=4) postpartum ewes were 348+66 vs 994+145 (P<0.05) for E and 618+126 vs ll70+201 (P<0.05) for P, respectively. These data suggest an increased synthesis of receptors, probably due to the presence of ovarian estrogen-active follicles. Cervical E and Preceptor concentrations were similar or higher than those in lhe uterus(1.40+0.15, n=10 and 1.51l+0.19, n=10; for E and P respectively), and these receptor ratios did not differ between the early and Iate postpartum período. The high ratio between cervical/uterine receptors suggests that the ovine cervix may be a very sensitive to steroid action. ln conclusion, it was shown that restoration of steroid receptors during the postpartum period in the ovine cervix is similar to receptor dynamics in the uterus, and is probably associated with the recovery of ovarian cyclicity.
650 $aEndocrinologia
650 $aEstrógeno
650 $aOvelha
650 $aOvino
650 $aPós-Parto
650 $aProgesterona
650 $aReprodução Animal
653 $aAtividade ovariana
700 1 $aTASENDE, C.
700 1 $aMEIKLE, A.
700 1 $aGARÓFALO, E. G.
773 $tTheriogenology$gv. 53, n. 3, p. 743-750, 2000.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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