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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
13/06/2017 |
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Data da última atualização: |
13/06/2017 |
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Autoria: |
SCHAMS, D.; RUESSE, I.; SCHALLENBERGER, E.; PROKOPP, S.; CHAN, J. S. D. |
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Título: |
The role of steroid hormones, prolactin and placental lactogen on mammary gland development in ewes and heifers. |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
Journal of Endocrinology, v. 102, n. 1, p. 121-130, Jul. 1984. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In the first part of the investigations the interaction between oestradiol-17 beta, progesterone and prolactin on the formation of the lobuloalveolar structure of the mammary gland was studied in 21 nulliparous intact postpubertal ewes. Tissue specimens of the mammary gland were evaluated by light microscopical examination and prolactin was measured in blood samples. Combined treatment with oestradiol and progesterone induced physiological development of the lobuloalveolar structure of the mammary gland in the presence of prolactin. Suppression of prolactin by bromocriptine prevented this effect. Treatment with progesterone alone was not effective and revealed histological structures comparable to the controls. The interaction of oestradiol-17 beta with prolactin appears to be a main trigger for mammary gland development. In the second part of the investigations the effect of bromocriptine treatment during pregnancy on mammary gland development was studied in primigravid ewes and heifers. Mammary gland specimens were obtained for light and electron microscopical evaluation in ewes and heifers 5 and 10 days respectively before the expected date of parturition. Concentrations of prolactin and ovine placental lactogen were determined by radioimmunoassay. Bromocriptine treatment suppressed prolactin concentrations in ewes to minimal values but did not affect ovine placental lactogen concentrations. The histological evaluation revealed almost comparable stages of mammogenesis in both ewes and heifers. This effect can be attributed, at least in ewes, to the action of placental lactogen on mammogenesis. Placental lactogen might therefore be of physiological relevance during mammogenesis. MenosAbstract: In the first part of the investigations the interaction between oestradiol-17 beta, progesterone and prolactin on the formation of the lobuloalveolar structure of the mammary gland was studied in 21 nulliparous intact postpubertal ewes. Tissue specimens of the mammary gland were evaluated by light microscopical examination and prolactin was measured in blood samples. Combined treatment with oestradiol and progesterone induced physiological development of the lobuloalveolar structure of the mammary gland in the presence of prolactin. Suppression of prolactin by bromocriptine prevented this effect. Treatment with progesterone alone was not effective and revealed histological structures comparable to the controls. The interaction of oestradiol-17 beta with prolactin appears to be a main trigger for mammary gland development. In the second part of the investigations the effect of bromocriptine treatment during pregnancy on mammary gland development was studied in primigravid ewes and heifers. Mammary gland specimens were obtained for light and electron microscopical evaluation in ewes and heifers 5 and 10 days respectively before the expected date of parturition. Concentrations of prolactin and ovine placental lactogen were determined by radioimmunoassay. Bromocriptine treatment suppressed prolactin concentrations in ewes to minimal values but did not affect ovine placental lactogen concentrations. The histological evaluation revealed almost comparable stages of mammog... Mostrar Tudo |
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Palavras-Chave: |
Drug effects; Placental lactogen hormone. |
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Thesagro: |
Estradiol. |
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Thesaurus Nal: |
bromocriptine; Cattle; Mammary glands; Pharmacology; Pregnancy; Progesterone; Prolactin; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02549naa a2200301 a 4500
001 2070869
005 2017-06-13
008 1984 bl uuuu u00u1 u #d
100 1 $aSCHAMS, D.
245 $aThe role of steroid hormones, prolactin and placental lactogen on mammary gland development in ewes and heifers.
260 $c1984
520 $aAbstract: In the first part of the investigations the interaction between oestradiol-17 beta, progesterone and prolactin on the formation of the lobuloalveolar structure of the mammary gland was studied in 21 nulliparous intact postpubertal ewes. Tissue specimens of the mammary gland were evaluated by light microscopical examination and prolactin was measured in blood samples. Combined treatment with oestradiol and progesterone induced physiological development of the lobuloalveolar structure of the mammary gland in the presence of prolactin. Suppression of prolactin by bromocriptine prevented this effect. Treatment with progesterone alone was not effective and revealed histological structures comparable to the controls. The interaction of oestradiol-17 beta with prolactin appears to be a main trigger for mammary gland development. In the second part of the investigations the effect of bromocriptine treatment during pregnancy on mammary gland development was studied in primigravid ewes and heifers. Mammary gland specimens were obtained for light and electron microscopical evaluation in ewes and heifers 5 and 10 days respectively before the expected date of parturition. Concentrations of prolactin and ovine placental lactogen were determined by radioimmunoassay. Bromocriptine treatment suppressed prolactin concentrations in ewes to minimal values but did not affect ovine placental lactogen concentrations. The histological evaluation revealed almost comparable stages of mammogenesis in both ewes and heifers. This effect can be attributed, at least in ewes, to the action of placental lactogen on mammogenesis. Placental lactogen might therefore be of physiological relevance during mammogenesis.
650 $abromocriptine
650 $aCattle
650 $aMammary glands
650 $aPharmacology
650 $aPregnancy
650 $aProgesterone
650 $aProlactin
650 $aSheep
650 $aEstradiol
653 $aDrug effects
653 $aPlacental lactogen hormone
700 1 $aRUESSE, I.
700 1 $aSCHALLENBERGER, E.
700 1 $aPROKOPP, S.
700 1 $aCHAN, J. S. D.
773 $tJournal of Endocrinology$gv. 102, n. 1, p. 121-130, Jul. 1984.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 7 | |
| 1. |  | SUCASAS, L. F. A.; ANBE, L.; SHIRAHIGUE, L. D.; CABRAL, I. S. R.; BORGHESI, R.; OETTERER, M. Characterization of the aqueous fraction of sardine chemical silage to obtain by-products. In: AQUA, 2012, Prague, Czech Republic. Global Aquaculture Securing our Future: abstracts... EAS, WAS: Prague, Czech Republic, 2012. Não paginado.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 2. | | ANBE, L.; SUCASAS, L. F.; CABRAL, I. S.; SHIRAHIGUE, L. D.; MARTINS, W. S.; BORGHESI, R.; ELOI, P. M.; OETTERER, M. Fracionamento da silagem química de pescado visando a sustentabilidade da cadeia produtiva de sardinha (Sardinella brasiliensis). In: CONGRESO ARGENTINO DE CIENCIA Y TECNOLOGÍA DE ALIMENTOS (CYTAL), 13.; SIMPOSIO INTERNACIONAL DE NUEVAS TECNOLOGÍAS, 4.; SIMPOSIO LATINOAMERICANO SOBRE HIGIENE Y CALIDAD DE ALIMENTOS, 2.; SIMPOSIO SOBRE NORMATIVA ALIMENTARIA, 1., 2011, Buenos Aires. Ciência e tecnología de alimentos: anais. Buenos Aires: UCA, 2011.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 3. | | SHIRAHIGUE, L. D.; ANBE, L.; SUCASAS, L. F. A.; TRAVAGIN, L. G. F.; CABRAL, I. S. R.; BORGHESI, R.; OETTERER, M. Fracionamento de silagens ácidas de sardinha visando obtenção de co-produtos. In: SIMPÓSIO LATINO AMERICANO DE CIÊNCIA DE ALIMENTOS, 9. 2011, Campinas. Ciência de alimentos e qualidade de vida: saúde, meio ambiente e sustentabilidade: resumos. Campinas: UNICAMP, FEA: SLACA, 2011.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 4. | | SHIRAHIGUE, L. D.; SUCASAS, L. F. A.; CABRAL, I. S. R.; CAMARGO, A. C. de; SILVA, M. O.; BORGHESI, R.; OETTERER, M. Fractions of tilapia Oreochromis niloticus acid silage to obtain by-produtcs. In: AQUA, 2012., Global Aquaculture Securing our Future, Prague, Czech Republic. Abstracts... 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 5. | | SHIRAHIGUE, L. D.; SILVA, M. O.; CAMARGO, A. C.; SUCASAS, L. F. de A.; BORGHESI, R.; CABRAL, I. S. R. C.; SAVAY-DA-SILVA, L. K.; GALVÃO, J. A.; OETTERER, M. The feasibility of increasing lipid extraction in tilapia (Oreochromis niloticus) waste by proteolysis. Journal of Aquatic Food Product Technology, v. 25, n. 2, p. 265-271, 2016. Publicado on-line em nov. de 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 6. | | ANGELINI, M. F. C.; GALVÃO, J. A.; VIEIRA, A. de F.; SILVA, L. K. S. da; SHIRAHIGUE, L. D.; CABRAL, I. S. R.; MODESTA, R. C. D.; GALLO, C. R.; OETTERER, M. Shelf life and sensory assessment of tilapia quenelle during frozen storage. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 8, p. 1080-1087, ago. 2013. Título em português: Vida útil e avaliação sensorial de quenelle de tilápia durante o armazenamento em freezer.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 7. | | SUCASAS, L. F. A.; GOLEGÃ, V. C.; ANBE, L.; BORGHESI, R.; SHIRAHIGUE, L. D.; CABRAL, I. S. R.; MARTINS, W.; SAVAY-DA-SILVA, L. K.; MACIEL, E. S.; GALVÃO, J. A.; OETTERER, M. Seleção sustentável do agente acidificante para elaboração de silagem de resíduos do processamento de pescado. In: CONGRESO ARGENTINO DE CIENCIA Y TECNOLOGÍA DE ALIMENTOS (CYTAL), 13.; SIMPOSIO INTERNACIONAL DE NUEVAS TECNOLOGÍAS, 4.; SIMPOSIO LATINOAMERICANO SOBRE HIGIENE Y CALIDAD DE ALIMENTOS, 2.; SIMPOSIO SOBRE NORMATIVA ALIMENTARIA, 1., 2011, Buenos Aires. Ciência e tecnología de alimentos: anais. Buenos Aires: UCA, 2011. 5 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| Registros recuperados : 7 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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