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Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
04/01/2010 |
Data da última atualização: |
14/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MACHADO, R.; BERGAMASCHI, M. A. C. M.; BARBOSA, R. T.; OLIVEIRA, C. A. de; BINELLI, M. |
Afiliação: |
RUI MACHADO, CPPSE; MARCO AURELIO C MEIRA BERGAMASCHI, CPPSE; ROGERIO TAVEIRA BARBOSA, CPPSE; C. A. DE OLIVEIRA, FMVZ-USP - SÃO PAULO; M. BINELLI, FMVZ - USP - SÃO PAULO. |
Título: |
Ovarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Theriogenology, v. 69, n. 7, p. 798-804, apr. 2008. |
DOI: |
10.1016/j.theriogenology.2007.10.025 |
Idioma: |
Inglês |
Conteúdo: |
Maternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. MenosMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estr... Mostrar Tudo |
Palavras-Chave: |
Antiluteolytic strategies; Ovary. |
Thesagro: |
Estradiol. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02251naa a2200217 a 4500 001 1579307 005 2023-03-14 008 2008 bl uuuu u00u1 u #d 024 7 $a10.1016/j.theriogenology.2007.10.025$2DOI 100 1 $aMACHADO, R. 245 $aOvarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments.$h[electronic resource] 260 $c2008 520 $aMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. 650 $aEstradiol 653 $aAntiluteolytic strategies 653 $aOvary 700 1 $aBERGAMASCHI, M. A. C. M. 700 1 $aBARBOSA, R. T. 700 1 $aOLIVEIRA, C. A. de 700 1 $aBINELLI, M. 773 $tTheriogenology$gv. 69, n. 7, p. 798-804, apr. 2008.
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Embrapa Pecuária Sudeste (CPPSE) |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
14/09/2017 |
Data da última atualização: |
14/09/2017 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
DINIZ, W. J. da S.; CESAR, A. S. M.; GEISTLINGER, L.; TIZIOTO, P. C.; OLIVEIRA, P. S. N. de; AFONSO, J.; ROCHA, M. I. P.; LIMA, A. O. de; BUSS, C. E.; COUTINHO, L. L.; REGITANO, L. C. de A. |
Afiliação: |
Wellison Jarles da Silva Diniz, UFSCar; Aline Silva Mello Cesar, USP; Ludwig Geistlinger, Bolsista/Embrapa Pecuária Sudeste; Polyana Cristine Tizioto, USP; Priscila Silva Neubern de Oliveira, Bolsista/Embrapa Pecuária Sudeste; Juliana Afonso, UFSCar; Marina Ibelli Pereira Rocha, UFSCar; Andressa Oliveira de Lima, UFSCar; Carlos Eduardo Buss, UFSCar; Luiz Lehmann Coutinho, USP; LUCIANA CORREIA DE ALMEIDA REGITANO, CPPSE. |
Título: |
Co-expression network analysis identifies genes associated with iron content in bovine muscle. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: WORKSHOP ON OMICS STRATEGIES APPLIED TO LIVESTOCK SCIENCE, 1., 2017, Piracicaba, SP. Proceedings... São Carlos, SP: Embrapa Pecuária Sudeste, 2017. |
Páginas: |
p. 19. |
Série: |
(Embrapa Pecuária Sudeste. Documentos, 125) |
Idioma: |
Inglês |
Notas: |
Editores: Luiz Lehmann Coutinho, ESALQ/USP; Luciana Correia de Almeida Regitano, Embrapa Pecuária Sudeste; Gerson Barreto Mourão, ESALQ/USP; Aline Silva Mello Cesar, ESALQ/USP; Bárbara Silva Vignato, FZEA/USP; Mirele Daiana Poleti, ESALQ/USP; Wellison Jarles da Silva Diniz, UFSCar. |
Palavras-Chave: |
Network analysis; Systems biology. |
Thesaurus NAL: |
gene expression. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163799/1/Luciana-02.pdf
|
Marc: |
LEADER 01264nam a2200289 a 4500 001 2075630 005 2017-09-14 008 2017 bl uuuu u00u1 u #d 100 1 $aDINIZ, W. J. da S. 245 $aCo-expression network analysis identifies genes associated with iron content in bovine muscle.$h[electronic resource] 260 $aIn: WORKSHOP ON OMICS STRATEGIES APPLIED TO LIVESTOCK SCIENCE, 1., 2017, Piracicaba, SP. Proceedings... São Carlos, SP: Embrapa Pecuária Sudeste$c2017 300 $ap. 19. 490 $a(Embrapa Pecuária Sudeste. Documentos, 125) 500 $aEditores: Luiz Lehmann Coutinho, ESALQ/USP; Luciana Correia de Almeida Regitano, Embrapa Pecuária Sudeste; Gerson Barreto Mourão, ESALQ/USP; Aline Silva Mello Cesar, ESALQ/USP; Bárbara Silva Vignato, FZEA/USP; Mirele Daiana Poleti, ESALQ/USP; Wellison Jarles da Silva Diniz, UFSCar. 650 $agene expression 653 $aNetwork analysis 653 $aSystems biology 700 1 $aCESAR, A. S. M. 700 1 $aGEISTLINGER, L. 700 1 $aTIZIOTO, P. C. 700 1 $aOLIVEIRA, P. S. N. de 700 1 $aAFONSO, J. 700 1 $aROCHA, M. I. P. 700 1 $aLIMA, A. O. de 700 1 $aBUSS, C. E. 700 1 $aCOUTINHO, L. L. 700 1 $aREGITANO, L. C. de A.
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