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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
01/06/2023 |
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Autoria: |
CURRIE, W. B.; KELLY, P. A.; FRIESEN, H. G.; THORBURN, G. D. |
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Título: |
Caprine placental lactogen: levels of prolactin-like and growth hormone-like activities in the circulation of pregnant goats determined by radioreceptor assays. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Journal Endocrinology, v. 73, n. 2, p. 215-226, May, 1977. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Radioreceptor assays for prolactin-like (lactogenic) activity and growth hormone (GH)-like activity have been used to study concentrations of caprine placental lactogen (PL) in the circulation during pregnancy. Both lactogenic and GH-like activities from less than 100 ng/ml (ovine prolactin- and human GH-equivalents) about 60 days after mating to reach peak levels (400-1600 ng/ml) between days 110 and 130 of pregnancy. The levels of both activities increased in essentially the same fashion but during the last 15 days of pregnancy, lactogenic activity declined less than GH-like activity. This divergence was most pronounced at parturition when levels of lactogenic activity increased (approximately 700 ng/ml) despite very low (less than 200 ng/ml) levels of GH-like activity being measured and this probably reflected increased secretion of pituitary prolactin near parturition. When serum from a pregnant goat or a simple alkaline extract of placental cotyledons was fractioned on a column packed with Sephadex G-100, lactogenic and GH-like activities eluted together with distribution coefficients of approximately 0-5-0-6. The possibility that caprine PL serves physiologically as a luteotrophin and/or mammotrophin during pregnancy in goats is discussed. |
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Palavras-Chave: |
Growth hormone blood; Radioligand Assay. |
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Thesagro: |
Caprino; Endocrinologia; Fisiologia; Prenhez; Reprodução. |
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Thesaurus Nal: |
Endocrinology; Females; Goats; Obstetric labor; Physiology; Pregnancy; Progesterone; Prolactin; Reproduction. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02283naa a2200349 a 4500
001 1520344
005 2023-06-01
008 1977 bl uuuu u00u1 u #d
100 1 $aCURRIE, W. B.
245 $aCaprine placental lactogen$blevels of prolactin-like and growth hormone-like activities in the circulation of pregnant goats determined by radioreceptor assays.$h[electronic resource]
260 $c1977
520 $aAbstract: Radioreceptor assays for prolactin-like (lactogenic) activity and growth hormone (GH)-like activity have been used to study concentrations of caprine placental lactogen (PL) in the circulation during pregnancy. Both lactogenic and GH-like activities from less than 100 ng/ml (ovine prolactin- and human GH-equivalents) about 60 days after mating to reach peak levels (400-1600 ng/ml) between days 110 and 130 of pregnancy. The levels of both activities increased in essentially the same fashion but during the last 15 days of pregnancy, lactogenic activity declined less than GH-like activity. This divergence was most pronounced at parturition when levels of lactogenic activity increased (approximately 700 ng/ml) despite very low (less than 200 ng/ml) levels of GH-like activity being measured and this probably reflected increased secretion of pituitary prolactin near parturition. When serum from a pregnant goat or a simple alkaline extract of placental cotyledons was fractioned on a column packed with Sephadex G-100, lactogenic and GH-like activities eluted together with distribution coefficients of approximately 0-5-0-6. The possibility that caprine PL serves physiologically as a luteotrophin and/or mammotrophin during pregnancy in goats is discussed.
650 $aEndocrinology
650 $aFemales
650 $aGoats
650 $aObstetric labor
650 $aPhysiology
650 $aPregnancy
650 $aProgesterone
650 $aProlactin
650 $aReproduction
650 $aCaprino
650 $aEndocrinologia
650 $aFisiologia
650 $aPrenhez
650 $aReprodução
653 $aGrowth hormone blood
653 $aRadioligand Assay
700 1 $aKELLY, P. A.
700 1 $aFRIESEN, H. G.
700 1 $aTHORBURN, G. D.
773 $tJournal Endocrinology$gv. 73, n. 2, p. 215-226, May, 1977.
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