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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | University of Florida | - |
Autor(es): dc.contributor | Univ. Estadual de São Paulo | - |
Autor(es): dc.contributor | University of South Alabama | - |
Autor(es): dc.creator | Schmitt, É J.P. | - |
Autor(es): dc.creator | Barros, C. M. | - |
Autor(es): dc.creator | Fields, P. A. | - |
Autor(es): dc.creator | Fields, M. J. | - |
Autor(es): dc.creator | Diaz, T. | - |
Autor(es): dc.creator | Kluge, J. M. | - |
Autor(es): dc.creator | Thatcher, W. W. | - |
Data de aceite: dc.date.accessioned | 2022-08-04T22:01:01Z | - |
Data de disponibilização: dc.date.available | 2022-08-04T22:01:01Z | - |
Data de envio: dc.date.issued | 2022-04-28 | - |
Data de envio: dc.date.issued | 2022-04-28 | - |
Data de envio: dc.date.issued | 1996-01-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.2527/1996.7481915x | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/219194 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/219194 | - |
Descrição: dc.description | To determine whether injection of hCG or GnRH-agonist on d 5 after estrus (d 0) has a differential functional effect on an induced and the original corpus luteum (CL), two experiments were conducted. In Exp. 1, nonlactating Holstein cows were injected on d 5 with saline (n = 4; T1), a GnRH-agonist (Buserelin®, 8 μg i.m.; n = 4; T2), or hCG (1,000 IU, i.v., and 2,000 IU, i.m.; n = 4; T3). Induced CL were removed on d 13 and weights were different (GnRH-agonist < hCG). In vitro production of progesterone by CL tissue (μg/g; μg/CL) was affected by treatment (GnRH-agonist < hCG) and dose of LH (ng/mL) in culture media. Experiment 2 was a replicate of Exp. 1, except that the original CL was removed on d 17 for in vitro culture. Day-17 CL weights and in vitro production of progesterone by original CL were not affected by treatment. The daily rate of increase of plasma progesterone from d 6 to d 13 differed: saline < GnRH-agonist < hCG (P < .01). From d 14 to 17, the rate of plasma progesterone decrease was not different between treatments. Electron micrographic study of the original and induced CL indicates that LH-like exposure delays involution of steroidogenic luteal cells. In summary, the higher levels of progesterone from d 6 to d 13 of the estrous cycle following an injection of hCG vs GnRH-agonist on d 5 is due to a greater response of hCG-induced CL. | - |
Descrição: dc.description | Dept. of Dairy and Poultry Sciences University of Florida, Gainesville, FL 32611 | - |
Descrição: dc.description | Department of Animal Science University of Florida, Gainesville, FL 32611 | - |
Descrição: dc.description | Department of Pharmacology Univ. Estadual de São Paulo, São Paulo 18600 | - |
Descrição: dc.description | Dept. of Struct. and Cell. Biology University of South Alabama, Mobile, AL 36688 | - |
Formato: dc.format | 1915-1929 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Journal of Animal Science | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Corpus Luteum | - |
Palavras-chave: dc.subject | Gonadotropins | - |
Palavras-chave: dc.subject | hCG | - |
Palavras-chave: dc.subject | Luteal Cells | - |
Palavras-chave: dc.subject | Progesterone | - |
Título: dc.title | A Cellular and Endocrine Characterization of the Original and Induced Corpus Luteum after Administration of a Gonadotropin-Releasing Hormone Agonist or Human Chorionic Gonadotropin on Day Five of the Estrous Cycle | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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