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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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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: |
06/06/2025 |
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Autoria: |
BARNES, R. J.; COMLINE, R. S.; SILVER, M. |
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Título: |
The effects of bilateral adrenalectomy or hypophysectomy of the foetal lamb in utero. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
The Journal of Physiology, v. 264, n. 2, p. 429-247, Jan. 1977. |
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DOI: |
10.1113/jphysiol.1977.sp011676. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: 1. Foetal hypophysectomy or bilateral adrenalectomy, carried out in utero at about 100 or 125 days gestation respectively, increased the length of gestation in sheep. It was confirmed that pregnancy was not prolonged significantly if hypophysectomy or adrenalectomy was carried out on one of a pair of twins. The hypophysectomized foetus was, however, smaller and the adrenalectomized foetus larger, than the unoperated twin. 2. In about half of the previously operated foetuses intravascular catheters were inserted into both mother and foetus, either at about 125 days, for a comparison with normal catheterized foetuses, or during the post-mature period. Both adrenalectomized and hypophysectomized foetuses appeared to have little resistance to stress or infection and the majority survived only 1-2 weeks after the insertion of catheters. 3. Maternal peripheral plasma oestrogen, progesterone and corticosteroid concentrations did not appear to be altered by either foetal hypophysectomy or adrenalectomy and were maintained in the normal range during prolonged gestation. 4. Foetal plasma oestrogen concentrations were significantly lower after hypophysectomy or adrenalectomy than values found in control lambs. Plasma progesterone values were low in all three groups of foetuses. 5. Plasma corticosteroid concentrations after foetal hypophysectomy (12-6 ng/ml.) or adrenalectomy (14-7 ng/ml.) were in the same range as the values for control lambs before the pre-partum rise (14-6 ng/ml.). However, there was a small but significant maternal-to-foetal plasma corticosteroid gradient in the two operated groups whereas this difference was not found in the control animals. 6. Tissue glycogen concentrations were measured in non-catheterized adrenalectomized and hypophysectomized foetuses. In these two groups, whether examined before 149 days or after prolonged gestation, liver glycogen concentrations were 30-40% of those in non-catheterized control foetuses at term. In other respects there was little apparent difference between adrenalectomized and control foetuses. 7. Hypophysectomized foetuses had significantly higher glycogen concentrations in heart, skeletal muscle and lung compared with control or adrenalectomized lambs. Plasma glucose and fructose values were also low in this group compared with control foetuses. MenosAbstract: 1. Foetal hypophysectomy or bilateral adrenalectomy, carried out in utero at about 100 or 125 days gestation respectively, increased the length of gestation in sheep. It was confirmed that pregnancy was not prolonged significantly if hypophysectomy or adrenalectomy was carried out on one of a pair of twins. The hypophysectomized foetus was, however, smaller and the adrenalectomized foetus larger, than the unoperated twin. 2. In about half of the previously operated foetuses intravascular catheters were inserted into both mother and foetus, either at about 125 days, for a comparison with normal catheterized foetuses, or during the post-mature period. Both adrenalectomized and hypophysectomized foetuses appeared to have little resistance to stress or infection and the majority survived only 1-2 weeks after the insertion of catheters. 3. Maternal peripheral plasma oestrogen, progesterone and corticosteroid concentrations did not appear to be altered by either foetal hypophysectomy or adrenalectomy and were maintained in the normal range during prolonged gestation. 4. Foetal plasma oestrogen concentrations were significantly lower after hypophysectomy or adrenalectomy than values found in control lambs. Plasma progesterone values were low in all three groups of foetuses. 5. Plasma corticosteroid concentrations after foetal hypophysectomy (12-6 ng/ml.) or adrenalectomy (14-7 ng/ml.) were in the same range as the values for control lambs before the pre-partum rise (14-6 ... Mostrar Tudo |
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Palavras-Chave: |
Foetus; Gestacao; Oestrogens. |
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Thesagro: |
Endocrinologia; Ovino; Reprodução. |
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Thesaurus Nal: |
Adrenal cortex hormones; Adrenal glands; Adrenalectomy; Body weight; Embryology; Gestation period; Glycogen; Hypophysectomy; Physiology; Pituitary gland; Pregnancy; Progesterone; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03391naa a2200385 a 4500
001 1521966
005 2025-06-06
008 1977 bl uuuu u00u1 u #d
024 7 $a10.1113/jphysiol.1977.sp011676.$2DOI
100 1 $aBARNES, R. J.
245 $aThe effects of bilateral adrenalectomy or hypophysectomy of the foetal lamb in utero.$h[electronic resource]
260 $c1977
520 $aAbstract: 1. Foetal hypophysectomy or bilateral adrenalectomy, carried out in utero at about 100 or 125 days gestation respectively, increased the length of gestation in sheep. It was confirmed that pregnancy was not prolonged significantly if hypophysectomy or adrenalectomy was carried out on one of a pair of twins. The hypophysectomized foetus was, however, smaller and the adrenalectomized foetus larger, than the unoperated twin. 2. In about half of the previously operated foetuses intravascular catheters were inserted into both mother and foetus, either at about 125 days, for a comparison with normal catheterized foetuses, or during the post-mature period. Both adrenalectomized and hypophysectomized foetuses appeared to have little resistance to stress or infection and the majority survived only 1-2 weeks after the insertion of catheters. 3. Maternal peripheral plasma oestrogen, progesterone and corticosteroid concentrations did not appear to be altered by either foetal hypophysectomy or adrenalectomy and were maintained in the normal range during prolonged gestation. 4. Foetal plasma oestrogen concentrations were significantly lower after hypophysectomy or adrenalectomy than values found in control lambs. Plasma progesterone values were low in all three groups of foetuses. 5. Plasma corticosteroid concentrations after foetal hypophysectomy (12-6 ng/ml.) or adrenalectomy (14-7 ng/ml.) were in the same range as the values for control lambs before the pre-partum rise (14-6 ng/ml.). However, there was a small but significant maternal-to-foetal plasma corticosteroid gradient in the two operated groups whereas this difference was not found in the control animals. 6. Tissue glycogen concentrations were measured in non-catheterized adrenalectomized and hypophysectomized foetuses. In these two groups, whether examined before 149 days or after prolonged gestation, liver glycogen concentrations were 30-40% of those in non-catheterized control foetuses at term. In other respects there was little apparent difference between adrenalectomized and control foetuses. 7. Hypophysectomized foetuses had significantly higher glycogen concentrations in heart, skeletal muscle and lung compared with control or adrenalectomized lambs. Plasma glucose and fructose values were also low in this group compared with control foetuses.
650 $aAdrenal cortex hormones
650 $aAdrenal glands
650 $aAdrenalectomy
650 $aBody weight
650 $aEmbryology
650 $aGestation period
650 $aGlycogen
650 $aHypophysectomy
650 $aPhysiology
650 $aPituitary gland
650 $aPregnancy
650 $aProgesterone
650 $aSheep
650 $aEndocrinologia
650 $aOvino
650 $aReprodução
653 $aFoetus
653 $aGestacao
653 $aOestrogens
700 1 $aCOMLINE, R. S.
700 1 $aSILVER, M.
773 $tThe Journal of Physiology$gv. 264, n. 2, p. 429-247, Jan. 1977.
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| 2. |  | LIMA, J. R.; SOUZA NETO, M. A. de; SOUSA, A. V. de; SARAIVA, S. C. O.; FAVARO, S. P.; OLIVEIRA, L. C. S. OLIVEIRA, E. A. de. Composição em ácidos graxos do óleo da amêndoa de baru. In: CONGRESSO LATINO AMERICANO DE ANALISTAS DE ALIMENTOS, 15., 2007, Fortaleza-CE. Anais... Fortaleza: SBAAL, 2007. 3 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
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