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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
13/12/2016 |
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Data da última atualização: |
30/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VIANA, J. H. M.; VARGAS, M. S. B.; SIQUEIRA, L. G. B.; CAMARGO, L. S. de A.; FIGUEIREDO, A. C. S.; FERNANDES, C. A. C.; PALHÃO, M. P. |
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Afiliação: |
JOAO HENRIQUE MOREIRA VIANA, Cenargen; M. S. B. VARGAS, UFES; LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; A. C. S. Figueiredo, Universidade José do Rosário Vellano, Alfenas, MG; C. A. C. Fernandes, Universidade José do Rosário Vellano, Alfenas, MG; M. P. Palhao, Universidade José do Rosário Vellano, Alfenas, MG. |
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Título: |
Efficacy of induction of luteolysis in superovulated cows is dependent on time of prostaglandin F2alpha analog treatment: effects on plasma progesterone and luteinizing hormone profiles. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Theriogenology, v. 86, n. 4, p. 934-939, 2016. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Abstract The objectives were to (1) evaluate the effectiveness of induction of luteolysis in superovulated (SOV) cows at two distinct time points after embryoflushing; and (2) compare the pattern of LH release after treatment with PGF in cows with single vs. multiple ovulations. In the first experiment, Holstein cows were SOV with 400 IU of FSH following standard procedures. Uterine flushing for embryo recovery was performed 7 days after artificial insemination (Day 0), and cows were randomly allocated into two groups to receive PGF (0.5-mg sodium cloprostenol,intramascular) eitherimmediately afterflushing (Day 7 group, N¼ 19) or 4 days later (Day 11 group, N ¼ 20). Time of luteolysis was determined on the basis of plasma progesterone (P4) concentrations. There was no difference (P> 0.05) in plasma P4 before treatment between Day 7 and Day 11 groups. A decline in plasma P4 was observed 48 hours after PGF treatment in both the groups (P< 0.0001). In Day 11 cows, P4 continued to decrease thereafter, whereas Day 7 animals had no further reduction in plasma P4. Luteolysis (P4 < 1 ng/mL) occurred in all Day 11 cows. In the Day 7 group, however, luteolysis failure was observed for 11 of 19 cows (57.9%). In cows without luteolysis, plasma P4 increased after the initial PGF?induced decline. The second experiment compared luteolysis in (SOV, N ¼ 6) vs. non-SOV (control, N ¼ 8) cows. Both groups received a single PGF treatment on Day 11 after estrus, and luteolysis was monitored daily by ovarian ultrasonography and plasma P4 measurements. In addition, plasma LH was measured in blood samples taken every 20 minutes for 1 hour during five consecutive days after treatment. A similar percentage of reduction in P4 was observed in both groups 24 hours after treatment; however, SOV cows only reached plasma P4 values similar (P > 0.05) to controls 96 hours after treatment. Therewas no differenceininitial LH values between SOV and controls (P> 0.05). The slower decreasein plasma P4 in the SOV group prevented an increase in LH for up to 96 hours after luteolysis induction, whereas LH values increased (P < 0.05) in controls 24 hours after treatment. In conclusion, (1) luteolysis may fail or be incomplete when PGF treatment is given on the day of uterine flushing (Day 7) in SOV cows; (2) induction of luteolysis 4 days later (Day 11) is effective, but the initial high-plasma P4 concentrations result in a slower slope of P4 decline to basal levels, and consequently, delayed increase in LH pulses. MenosAbstract The objectives were to (1) evaluate the effectiveness of induction of luteolysis in superovulated (SOV) cows at two distinct time points after embryoflushing; and (2) compare the pattern of LH release after treatment with PGF in cows with single vs. multiple ovulations. In the first experiment, Holstein cows were SOV with 400 IU of FSH following standard procedures. Uterine flushing for embryo recovery was performed 7 days after artificial insemination (Day 0), and cows were randomly allocated into two groups to receive PGF (0.5-mg sodium cloprostenol,intramascular) eitherimmediately afterflushing (Day 7 group, N¼ 19) or 4 days later (Day 11 group, N ¼ 20). Time of luteolysis was determined on the basis of plasma progesterone (P4) concentrations. There was no difference (P> 0.05) in plasma P4 before treatment between Day 7 and Day 11 groups. A decline in plasma P4 was observed 48 hours after PGF treatment in both the groups (P< 0.0001). In Day 11 cows, P4 continued to decrease thereafter, whereas Day 7 animals had no further reduction in plasma P4. Luteolysis (P4 < 1 ng/mL) occurred in all Day 11 cows. In the Day 7 group, however, luteolysis failure was observed for 11 of 19 cows (57.9%). In cows without luteolysis, plasma P4 increased after the initial PGF?induced decline. The second experiment compared luteolysis in (SOV, N ¼ 6) vs. non-SOV (control, N ¼ 8) cows. Both groups received a single PGF treatment on Day 11 after estrus, and luteolysis was monitored daily... Mostrar Tudo |
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Palavras-Chave: |
Bovine; Corpora lutea; Sodium cloprostenol. |
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Thesaurus Nal: |
Embryo transfer. |
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Categoria do assunto: |
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L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03343naa a2200241 a 4500
001 2062817
005 2023-01-30
008 2016 bl uuuu u00u1 u #d
100 1 $aVIANA, J. H. M.
245 $aEfficacy of induction of luteolysis in superovulated cows is dependent on time of prostaglandin F2alpha analog treatment$beffects on plasma progesterone and luteinizing hormone profiles.$h[electronic resource]
260 $c2016
520 $aAbstract The objectives were to (1) evaluate the effectiveness of induction of luteolysis in superovulated (SOV) cows at two distinct time points after embryoflushing; and (2) compare the pattern of LH release after treatment with PGF in cows with single vs. multiple ovulations. In the first experiment, Holstein cows were SOV with 400 IU of FSH following standard procedures. Uterine flushing for embryo recovery was performed 7 days after artificial insemination (Day 0), and cows were randomly allocated into two groups to receive PGF (0.5-mg sodium cloprostenol,intramascular) eitherimmediately afterflushing (Day 7 group, N¼ 19) or 4 days later (Day 11 group, N ¼ 20). Time of luteolysis was determined on the basis of plasma progesterone (P4) concentrations. There was no difference (P> 0.05) in plasma P4 before treatment between Day 7 and Day 11 groups. A decline in plasma P4 was observed 48 hours after PGF treatment in both the groups (P< 0.0001). In Day 11 cows, P4 continued to decrease thereafter, whereas Day 7 animals had no further reduction in plasma P4. Luteolysis (P4 < 1 ng/mL) occurred in all Day 11 cows. In the Day 7 group, however, luteolysis failure was observed for 11 of 19 cows (57.9%). In cows without luteolysis, plasma P4 increased after the initial PGF?induced decline. The second experiment compared luteolysis in (SOV, N ¼ 6) vs. non-SOV (control, N ¼ 8) cows. Both groups received a single PGF treatment on Day 11 after estrus, and luteolysis was monitored daily by ovarian ultrasonography and plasma P4 measurements. In addition, plasma LH was measured in blood samples taken every 20 minutes for 1 hour during five consecutive days after treatment. A similar percentage of reduction in P4 was observed in both groups 24 hours after treatment; however, SOV cows only reached plasma P4 values similar (P > 0.05) to controls 96 hours after treatment. Therewas no differenceininitial LH values between SOV and controls (P> 0.05). The slower decreasein plasma P4 in the SOV group prevented an increase in LH for up to 96 hours after luteolysis induction, whereas LH values increased (P < 0.05) in controls 24 hours after treatment. In conclusion, (1) luteolysis may fail or be incomplete when PGF treatment is given on the day of uterine flushing (Day 7) in SOV cows; (2) induction of luteolysis 4 days later (Day 11) is effective, but the initial high-plasma P4 concentrations result in a slower slope of P4 decline to basal levels, and consequently, delayed increase in LH pulses.
650 $aEmbryo transfer
653 $aBovine
653 $aCorpora lutea
653 $aSodium cloprostenol
700 1 $aVARGAS, M. S. B.
700 1 $aSIQUEIRA, L. G. B.
700 1 $aCAMARGO, L. S. de A.
700 1 $aFIGUEIREDO, A. C. S.
700 1 $aFERNANDES, C. A. C.
700 1 $aPALHÃO, M. P.
773 $tTheriogenology$gv. 86, n. 4, p. 934-939, 2016.
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| 16. |  | ROCHA, P. S. G. da; OLIVEIRA, R. P. de; SCIVITTARO, W. B.; SANTOS, U. L. dos. Diodos emissores de luz e concentrações de BAP na multiplicação in vitro de morangueiro. Ciência Rural, Santa Maria, v. 40, n. 9, p. 1922-1928, set., 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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