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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: |
14/11/2023 |
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Autoria: |
ROBINSON, K. W.; MORRIS, L. R. |
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Título: |
Adrenal cortical activity in sheep as measured by urinary 17-ketogenic steroid excretion. |
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Ano de publicação: |
1970 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 11, n. 1, p. 236-246, 1970. |
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DOI: |
https://doi.org/10.1071/AR9600236 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The effects of a number of stimuli on adrenal activity in sheep were assessed from measurements of the output of urinary 17-ketogenic steroids (17-KGS). Evidence for the claim that 17-KGS excretion in sheep reflects adrenal cortical activity was provided by observations that injections of ACTH produced a marked rise in concentration of these steroid metabolites in the urine. A seasonal rhythm in the urinary excretion of 17-KGS was observed. The peak winter output of these steroids was eight times that found in midsummer. This pattern of adrenal activity appears to be temperature- and not light-induced. In the pregnant ewe, the urinary 17-KGS output followed normal seasonal fluctuations over the greater part of gestation. However, a sudden drop in values occurred during the 2 weeks prior to lambing. This was followed by a progressive rise post partum which was dependent on active lactation. The pre-partum fall in steroid excretion was also observed in pregnant ewes undergoing daily ACTH therapy. The significance of these findings is discussed. Pregnancy appears to modify the response of sheep to repeated intramuscular injections of ACTH. The steroid excretion rate was related to the dosage level of ACTH in both pregnant and non-pregnant ewes although gestation markedly reduced the total output. There was no evidence of adrenal atrophy with repeated cortisone injections over 8 weeks, but endogenous ACTH release appeared to be delayed when daily ACTH injections were discontinued. Injections of 300 mg cortisone acetate and 50 i.u. of ACTH, over a period, gave comparable excretion rates of 17-KGS in non-pregnant ewes. MenosAbstract: The effects of a number of stimuli on adrenal activity in sheep were assessed from measurements of the output of urinary 17-ketogenic steroids (17-KGS). Evidence for the claim that 17-KGS excretion in sheep reflects adrenal cortical activity was provided by observations that injections of ACTH produced a marked rise in concentration of these steroid metabolites in the urine. A seasonal rhythm in the urinary excretion of 17-KGS was observed. The peak winter output of these steroids was eight times that found in midsummer. This pattern of adrenal activity appears to be temperature- and not light-induced. In the pregnant ewe, the urinary 17-KGS output followed normal seasonal fluctuations over the greater part of gestation. However, a sudden drop in values occurred during the 2 weeks prior to lambing. This was followed by a progressive rise post partum which was dependent on active lactation. The pre-partum fall in steroid excretion was also observed in pregnant ewes undergoing daily ACTH therapy. The significance of these findings is discussed. Pregnancy appears to modify the response of sheep to repeated intramuscular injections of ACTH. The steroid excretion rate was related to the dosage level of ACTH in both pregnant and non-pregnant ewes although gestation markedly reduced the total output. There was no evidence of adrenal atrophy with repeated cortisone injections over 8 weeks, but endogenous ACTH release appeared to be delayed when daily ACTH injections were d... Mostrar Tudo |
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Thesagro: |
Endocrinologia; Ovino; Reprodução. |
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Thesaurus Nal: |
Endocrinology; Ewes; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02309naa a2200229 a 4500
001 1521175
005 2023-11-14
008 1970 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1071/AR9600236$2DOI
100 1 $aROBINSON, K. W.
245 $aAdrenal cortical activity in sheep as measured by urinary 17-ketogenic steroid excretion.
260 $c1970
520 $aAbstract: The effects of a number of stimuli on adrenal activity in sheep were assessed from measurements of the output of urinary 17-ketogenic steroids (17-KGS). Evidence for the claim that 17-KGS excretion in sheep reflects adrenal cortical activity was provided by observations that injections of ACTH produced a marked rise in concentration of these steroid metabolites in the urine. A seasonal rhythm in the urinary excretion of 17-KGS was observed. The peak winter output of these steroids was eight times that found in midsummer. This pattern of adrenal activity appears to be temperature- and not light-induced. In the pregnant ewe, the urinary 17-KGS output followed normal seasonal fluctuations over the greater part of gestation. However, a sudden drop in values occurred during the 2 weeks prior to lambing. This was followed by a progressive rise post partum which was dependent on active lactation. The pre-partum fall in steroid excretion was also observed in pregnant ewes undergoing daily ACTH therapy. The significance of these findings is discussed. Pregnancy appears to modify the response of sheep to repeated intramuscular injections of ACTH. The steroid excretion rate was related to the dosage level of ACTH in both pregnant and non-pregnant ewes although gestation markedly reduced the total output. There was no evidence of adrenal atrophy with repeated cortisone injections over 8 weeks, but endogenous ACTH release appeared to be delayed when daily ACTH injections were discontinued. Injections of 300 mg cortisone acetate and 50 i.u. of ACTH, over a period, gave comparable excretion rates of 17-KGS in non-pregnant ewes.
650 $aEndocrinology
650 $aEwes
650 $aReproduction
650 $aSheep
650 $aEndocrinologia
650 $aOvino
650 $aReprodução
700 1 $aMORRIS, L. R.
773 $tAustralian Journal of Agricultural Research$gv. 11, n. 1, p. 236-246, 1970.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 4 | |
| 2. |  | JOSLIN, A.; MARKEWITZ, D.; MORRIS, L.; KATO, O. R.; FIGUEIREDO, R.; OLIVEIRA, F. de A. Crescimento de cinco espécies nativas em successão natural na Amazônia Oriental. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 8., 2011, Belém, PA. Anais... Belém, PA: SBSAF: Embrapa Amazônia Oriental: UFRA: CEPLAC: EMATER: ICRAF, 2011. 1 CD-ROM. Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 3. | | JOSLIN, A. H.; MARKEWITZ, D.; MORRIS, L. A.; OLIVEIRA, F. de A.; FIGUEIREDO, R. de O.; KATO, O. R. Five native tree species and manioc under slash-and-mulch agroforestry in the eastern Amazon of Brazil: plant growth and soil responses. Agroforestry Systems, v. 81, n. 1, p. 1-14, 2011.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 4. | | JOSLIN, A. H.; MARKEWITZ, D.; MORRIS, L. A.; OLIVEIRA, F. de A.; FIGUEIREDO, R. O.; KATO, O. R. Soil and plant N-budget 1 year after planting of a slash-and-mulch agroforestry system in the eastern Amazon of Brazil. Agroforestry Systems, v. 87, n. 6, p. 1339-1349, Dec. 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Amazônia Oriental. |
|  |
| Registros recuperados : 4 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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