Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats
Effects of rumen undegradable intake protein (UIP) supplementation on ovarian activity and serum insulin, GH, and LH were evaluated in goats having low or high body condition (BC). Goats with either low BC (n = 16, 28.7 ± 0.8 kg BW, BC = 2.1 ± 0.3) or high BC (n = 16, 38.4 ± 0.8 kg, BC = 3.2 ± 0.3) received, during 40-days, one of the two protein supplementation levels without UIP or with UIP (120 g goat-1 d-1). Oestrus was synchronized with two i.m. doses of PGF2α, and jugular blood samples were collected from 36 to 42 h after the second prostaglandin injection at 15 min intervals. Serum concentrations of insulin, LH, and GH were measured The number of preovulatory follicles and the number of corpora lutea (CL) were evaluated by transrectal ultrasonography at 1 and 4 days after the second prostaglandin dose, respectively. Does with higher BC had more CL than those in the lower condition group (2.8 ± 0.2 versus 1.8 ± 0.2, P < 0.05). Similarly, goats receiving UIP supplementation had more follicles (2.6 ± 0.2 versus 1.9 ± 0.2, P < 0.05) and tended to have more CL (2.6 ± 0.2 versus 2.0 ± 0.2, P = 0.05) than does not receiving UIP. Neither BCS nor UIP supplementation affected serum GH or LH concentrations, pulsatility, or area under the curve. High BC does produced more insulin (1.92 ± 0.17 versus 0.81 ± 0.17 ng/mL, P < 0.01 ng/mL) than lower BC goats; the same for UIP-supplemented (1.69 ± 0.18 versus 1.04 ± 0.18, P < 0.05). Results suggest that the increased ovarian activity observed in both UIP-supplemented and higher BC goats was not the result of changes in LH or GH, suggesting effects at a local level, through changes in insulin in a non-GnRH-gonadotrophin dependent manner. © 2007 Elsevier B.V. All rights reserved.
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Elsevier
2008
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Subjects: | Body condition, Goat, Hormones, Ovarian activity, Rumen undegradable intake protein, |
Online Access: | http://hdl.handle.net/20.500.12792/2881 http://hdl.handle.net/10261/291345 |
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dig-inia-es-10261-2913452023-02-20T07:17:11Z Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats Meza-Herrera, C. A. Hallford, D. M. Ortiz, J. A. Cuevas, R. A. Sanchez, J. M. Salinas, H. Mellado, M. González De Bulnes, Antonio Body condition Goat Hormones Ovarian activity Rumen undegradable intake protein Effects of rumen undegradable intake protein (UIP) supplementation on ovarian activity and serum insulin, GH, and LH were evaluated in goats having low or high body condition (BC). Goats with either low BC (n = 16, 28.7 ± 0.8 kg BW, BC = 2.1 ± 0.3) or high BC (n = 16, 38.4 ± 0.8 kg, BC = 3.2 ± 0.3) received, during 40-days, one of the two protein supplementation levels without UIP or with UIP (120 g goat-1 d-1). Oestrus was synchronized with two i.m. doses of PGF2α, and jugular blood samples were collected from 36 to 42 h after the second prostaglandin injection at 15 min intervals. Serum concentrations of insulin, LH, and GH were measured The number of preovulatory follicles and the number of corpora lutea (CL) were evaluated by transrectal ultrasonography at 1 and 4 days after the second prostaglandin dose, respectively. Does with higher BC had more CL than those in the lower condition group (2.8 ± 0.2 versus 1.8 ± 0.2, P < 0.05). Similarly, goats receiving UIP supplementation had more follicles (2.6 ± 0.2 versus 1.9 ± 0.2, P < 0.05) and tended to have more CL (2.6 ± 0.2 versus 2.0 ± 0.2, P = 0.05) than does not receiving UIP. Neither BCS nor UIP supplementation affected serum GH or LH concentrations, pulsatility, or area under the curve. High BC does produced more insulin (1.92 ± 0.17 versus 0.81 ± 0.17 ng/mL, P < 0.01 ng/mL) than lower BC goats; the same for UIP-supplemented (1.69 ± 0.18 versus 1.04 ± 0.18, P < 0.05). Results suggest that the increased ovarian activity observed in both UIP-supplemented and higher BC goats was not the result of changes in LH or GH, suggesting effects at a local level, through changes in insulin in a non-GnRH-gonadotrophin dependent manner. © 2007 Elsevier B.V. All rights reserved. 2023-02-20T07:17:11Z 2023-02-20T07:17:11Z 2008 artículo Animal Reproduction Science 106(3-4): 412-420 (2008) 0378-4320 http://hdl.handle.net/20.500.12792/2881 http://hdl.handle.net/10261/291345 10.1016/j.anireprosci.2007.06.004 en none Elsevier |
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Body condition Goat Hormones Ovarian activity Rumen undegradable intake protein Body condition Goat Hormones Ovarian activity Rumen undegradable intake protein Meza-Herrera, C. A. Hallford, D. M. Ortiz, J. A. Cuevas, R. A. Sanchez, J. M. Salinas, H. Mellado, M. González De Bulnes, Antonio Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
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Effects of rumen undegradable intake protein (UIP) supplementation on ovarian activity and serum insulin, GH, and LH were evaluated in goats having low or high body condition (BC). Goats with either low BC (n = 16, 28.7 ± 0.8 kg BW, BC = 2.1 ± 0.3) or high BC (n = 16, 38.4 ± 0.8 kg, BC = 3.2 ± 0.3) received, during 40-days, one of the two protein supplementation levels without UIP or with UIP (120 g goat-1 d-1). Oestrus was synchronized with two i.m. doses of PGF2α, and jugular blood samples were collected from 36 to 42 h after the second prostaglandin injection at 15 min intervals. Serum concentrations of insulin, LH, and GH were measured The number of preovulatory follicles and the number of corpora lutea (CL) were evaluated by transrectal ultrasonography at 1 and 4 days after the second prostaglandin dose, respectively. Does with higher BC had more CL than those in the lower condition group (2.8 ± 0.2 versus 1.8 ± 0.2, P < 0.05). Similarly, goats receiving UIP supplementation had more follicles (2.6 ± 0.2 versus 1.9 ± 0.2, P < 0.05) and tended to have more CL (2.6 ± 0.2 versus 2.0 ± 0.2, P = 0.05) than does not receiving UIP. Neither BCS nor UIP supplementation affected serum GH or LH concentrations, pulsatility, or area under the curve. High BC does produced more insulin (1.92 ± 0.17 versus 0.81 ± 0.17 ng/mL, P < 0.01 ng/mL) than lower BC goats; the same for UIP-supplemented (1.69 ± 0.18 versus 1.04 ± 0.18, P < 0.05). Results suggest that the increased ovarian activity observed in both UIP-supplemented and higher BC goats was not the result of changes in LH or GH, suggesting effects at a local level, through changes in insulin in a non-GnRH-gonadotrophin dependent manner. © 2007 Elsevier B.V. All rights reserved. |
format |
artículo |
topic_facet |
Body condition Goat Hormones Ovarian activity Rumen undegradable intake protein |
author |
Meza-Herrera, C. A. Hallford, D. M. Ortiz, J. A. Cuevas, R. A. Sanchez, J. M. Salinas, H. Mellado, M. González De Bulnes, Antonio |
author_facet |
Meza-Herrera, C. A. Hallford, D. M. Ortiz, J. A. Cuevas, R. A. Sanchez, J. M. Salinas, H. Mellado, M. González De Bulnes, Antonio |
author_sort |
Meza-Herrera, C. A. |
title |
Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
title_short |
Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
title_full |
Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
title_fullStr |
Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
title_full_unstemmed |
Body condition and protein supplementation positively affect periovulatory ovarian activity by non LH-mediated pathways in goats |
title_sort |
body condition and protein supplementation positively affect periovulatory ovarian activity by non lh-mediated pathways in goats |
publisher |
Elsevier |
publishDate |
2008 |
url |
http://hdl.handle.net/20.500.12792/2881 http://hdl.handle.net/10261/291345 |
work_keys_str_mv |
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