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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: |
25/03/1996 |
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Data da última atualização: |
01/06/2023 |
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Autoria: |
ITO, K.; TANAKA, T.; MORI, Y. |
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Título: |
Opioid peptidergic control of gonadotropin-releasing hormone pulse generator activity in the ovariectomized goat. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Neuroendocrinology, v. 57, n. 4, p. 634-639, Apr. 1993. |
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DOI: |
10.1159/000126418 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The role of endogenous opioid peptides in the control of gonadotropin-releasing hormone pulse generator activity was examined in long-term ovariectomized goats by recording the hypothalamic multiple-unit activity specifically associated with pulsatile luteinizing hormone secretion (MUA volleys). Administration of naloxone, an opioid receptor antagonist, at a rate of 1.0 mg/kg/h for 2 h resulted in shorter (p < 0.05) intervals between MUA volleys than during the control period (61.6 +/- 0.7 vs. 92.5 +/- 7.2 min) in animals treated with progesterone and estradiol that had reproduced a steroidal milieu during the luteal phase. Similarly, in the absence of steroidal treatment, the interval between MUA volleys was shortened (p < 0.01) in a dose-dependent manner from 42.3 +/- 3.7 min (control) to 35.1 +/- 3.9, 32.6 +/- 4.1, and 27.0 +/- 1.7 min when infused with 0.2, 1.0, and 5.0 mg/kg/h of naloxone, respectively. On the other hand, the duration of each MUA volley was lengthened by naloxone. The results indicate that the hypothalamic gonadotropin-releasing hormone pulse generator activity is under a tonic suppression by endogenous opioid peptides in ovariectomized goats. |
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Palavras-Chave: |
Drug effects; GnRH; Peptideos. |
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Thesagro: |
Caprino; Endocrinologia; Estradiol; Reprodução. |
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Thesaurus Nal: |
Electrophysiology; Endorphins; Females; Goats; Gonadotropin-releasing hormone; Hypothalamus; Luteinizing hormone; Pharmacology; Physiology; Progesterone. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02187naa a2200361 a 4500
001 1522880
005 2023-06-01
008 1993 bl uuuu u00u1 u #d
024 7 $a10.1159/000126418$2DOI
100 1 $aITO, K.
245 $aOpioid peptidergic control of gonadotropin-releasing hormone pulse generator activity in the ovariectomized goat.$h[electronic resource]
260 $c1993
520 $aAbstract: The role of endogenous opioid peptides in the control of gonadotropin-releasing hormone pulse generator activity was examined in long-term ovariectomized goats by recording the hypothalamic multiple-unit activity specifically associated with pulsatile luteinizing hormone secretion (MUA volleys). Administration of naloxone, an opioid receptor antagonist, at a rate of 1.0 mg/kg/h for 2 h resulted in shorter (p < 0.05) intervals between MUA volleys than during the control period (61.6 +/- 0.7 vs. 92.5 +/- 7.2 min) in animals treated with progesterone and estradiol that had reproduced a steroidal milieu during the luteal phase. Similarly, in the absence of steroidal treatment, the interval between MUA volleys was shortened (p < 0.01) in a dose-dependent manner from 42.3 +/- 3.7 min (control) to 35.1 +/- 3.9, 32.6 +/- 4.1, and 27.0 +/- 1.7 min when infused with 0.2, 1.0, and 5.0 mg/kg/h of naloxone, respectively. On the other hand, the duration of each MUA volley was lengthened by naloxone. The results indicate that the hypothalamic gonadotropin-releasing hormone pulse generator activity is under a tonic suppression by endogenous opioid peptides in ovariectomized goats.
650 $aElectrophysiology
650 $aEndorphins
650 $aFemales
650 $aGoats
650 $aGonadotropin-releasing hormone
650 $aHypothalamus
650 $aLuteinizing hormone
650 $aPharmacology
650 $aPhysiology
650 $aProgesterone
650 $aCaprino
650 $aEndocrinologia
650 $aEstradiol
650 $aReprodução
653 $aDrug effects
653 $aGnRH
653 $aPeptideos
700 1 $aTANAKA, T.
700 1 $aMORI, Y.
773 $tNeuroendocrinology$gv. 57, n. 4, p. 634-639, Apr. 1993.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
20/02/2018 |
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Data da última atualização: |
22/02/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
BERTOLIN, F.; BONO, J. A. M.; MACEDO, M. C. M.; ARAUJO, A. R. de; PEREIRA, F. de A. R. |
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Afiliação: |
Fabiano Bertolin, University Anhanguera-Uniderp; José Antonio Maior Bono, University Anhanguera-Uniderp; Manuel Claudio Motta Macedo, University Anhanguera-Uniderp; ALEXANDRE ROMEIRO DE ARAUJO, CNPGC; Francisco de Assis Rolim Pereira, University Anhanguera-Uniderp. |
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Título: |
Use and management of pasture in the cerrado biome: Impacts on aggregation of an oxisol. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
African Journal of Agricultural Research, v. 11, n. 24, p. 2139-2145, June 2016 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the physical quality of a dystrophic Oxisol in the Cerrado biome, by means of its aggregation, after 19 years of use and management with pasture. The treatments were soil with natural vegetation (CERR); and soil with Brachiaria decumbens cultivar Basilisk pasture, under the following four types of management: soil with maintenance-level fertilization, every two years, and with legumes (PAML); soil with maintenance-level fertilization, every two years (PAM); soil with fertilization only at implantation (PAI); and soil with degraded pasture without fertilization (PD). In November 2012, after 19 years of land use in the treatments, soil samples were collected at four locations per plot, and at two depths, 0 to 10 and 10 to 20 cm. The study evaluated the size distribution of air-dried aggregates and the distribution of water-stable aggregates, determining the water-stable weighted mean diameters (WMDws), the efficiency ratio of aggregates (ERA) and organic matter content of soil. The management of grassland with fertilizer favors the formation of larger aggregates in the soil, as well as WMDsw, ERA and the content of organic matter, improving soil physical quality, both in the 0 to 10 cm and in the 10 to 20 cm layer. Impacts on soil aggregates caused by the removal of native vegetation can be improved with the use of soil under pasture and managed with fertilization in the 10 to 20 cm layer. |
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Palavras-Chave: |
Sustentabilidade. |
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Thesagro: |
Cerrado; Física do solo; Matéria orgânica; Pastagem; Solo. |
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Thesaurus NAL: |
Organic matter; Soil physics; Sustainable development. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/172827/1/2-Use-and-management-of-pasture-in-the-cerrado-biome-2016.pdf
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Marc: |
LEADER 02271naa a2200277 a 4500
001 2087854
005 2018-02-22
008 2016 bl uuuu u00u1 u #d
100 1 $aBERTOLIN, F.
245 $aUse and management of pasture in the cerrado biome$bImpacts on aggregation of an oxisol.$h[electronic resource]
260 $c2016
520 $aThe objective of this study was to evaluate the physical quality of a dystrophic Oxisol in the Cerrado biome, by means of its aggregation, after 19 years of use and management with pasture. The treatments were soil with natural vegetation (CERR); and soil with Brachiaria decumbens cultivar Basilisk pasture, under the following four types of management: soil with maintenance-level fertilization, every two years, and with legumes (PAML); soil with maintenance-level fertilization, every two years (PAM); soil with fertilization only at implantation (PAI); and soil with degraded pasture without fertilization (PD). In November 2012, after 19 years of land use in the treatments, soil samples were collected at four locations per plot, and at two depths, 0 to 10 and 10 to 20 cm. The study evaluated the size distribution of air-dried aggregates and the distribution of water-stable aggregates, determining the water-stable weighted mean diameters (WMDws), the efficiency ratio of aggregates (ERA) and organic matter content of soil. The management of grassland with fertilizer favors the formation of larger aggregates in the soil, as well as WMDsw, ERA and the content of organic matter, improving soil physical quality, both in the 0 to 10 cm and in the 10 to 20 cm layer. Impacts on soil aggregates caused by the removal of native vegetation can be improved with the use of soil under pasture and managed with fertilization in the 10 to 20 cm layer.
650 $aOrganic matter
650 $aSoil physics
650 $aSustainable development
650 $aCerrado
650 $aFísica do solo
650 $aMatéria orgânica
650 $aPastagem
650 $aSolo
653 $aSustentabilidade
700 1 $aBONO, J. A. M.
700 1 $aMACEDO, M. C. M.
700 1 $aARAUJO, A. R. de
700 1 $aPEREIRA, F. de A. R.
773 $tAfrican Journal of Agricultural Research$gv. 11, n. 24, p. 2139-2145, June 2016
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Embrapa Gado de Corte (CNPGC) |
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