Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers

Follicle ablation has been recognized as an efficient method of follicular wave synchronization. Treatment with recombinant bovine somatotropin (BST) has been shown to enhance follicular development in Bos taurus. This experiment assessed the effects of these treatments in Nelore (B. indicus) heifer...

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Autores principales: Buratini, José, Price, C.A., Visintin, Julio Antonio, Bó, G.A.
Formato: Artículo
Lenguaje:Español
Publicado: 2000
Materias:
SF Cultura de los animales
Acceso en línea:http://pa.bibdigital.ucc.edu.ar/3905/1/A_Buratini_Price_Visintin_B%C3%B3.pdf
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Producción Académica Universidad Católica de Córdoba (UCCor) de Universidad Católica de Córdoba
id I38-R144-3905
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spelling I38-R144-39052025-04-07T20:40:58Z http://pa.bibdigital.ucc.edu.ar/3905/ Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers Buratini, José Price, C.A. Visintin, Julio Antonio Bó, G.A. SF Cultura de los animales Follicle ablation has been recognized as an efficient method of follicular wave synchronization. Treatment with recombinant bovine somatotropin (BST) has been shown to enhance follicular development in Bos taurus. This experiment assessed the effects of these treatments in Nelore (B. indicus) heifers. Eight cycling Nelore heifers were randomly assigned to 3 different treatments. On Day 2 of a synchronized cycle (Day 0 = day of ovulation), heifers assigned to Treatments 1 and 2 received 2 mL of saline, whereas heifers assigned to Treatment 3 received 320 mg of BST. On Day 5, the first-wave dominant follicle was ablated by ultrasound-guided transvaginal aspiration in heifers in Treatments 2 and 3, and all heifers received an injection of prostaglandin on Day 11. Aspiration of the dominant follicle advanced and synchronized (P < 0.05) the day of second-wave emergence (6.9 ± 0.1 vs. 8.4 ± 0.4) and the day of the pre-wave FSH peak (6.0 ± 0.0 vs. 6.9 ± 0.4), and increased FSH peak concentrations (381 ± 21 vs. 292 ± 30; pg/mL; P < 0.01). Recombinant bovine somatotropin treatment caused a two-fold increase in plasma insulin-like growth factor-I (IGF-I) concentrations (P < 0.001) and resulted in a 36% increase in the number of small follicles (<5 mm; P < 0.001) compared with saline-treated heifers. In summary, in agreement with previous reports on B. taurus, dominant follicle aspiration synchronized ovarian follicular development, and BST treatment increased peripheral concentrations of IGF-I in Nelore heifers. Recombinant bovine somatotropin also increased the number of small follicles, but this response appeared to be inferior to that reported for B. taurus. 2000-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/closedAccess application/pdf spa http://pa.bibdigital.ucc.edu.ar/3905/1/A_Buratini_Price_Visintin_B%C3%B3.pdf Buratini, José ORCID: https://orcid.org/0000-0002-0479-0623 <https://orcid.org/0000-0002-0479-0623>, Price, C.A., Visintin, Julio Antonio and Bó, G.A. (2000) Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers. Theriogenology, 54 (3). pp. 421-431. ISSN 0093-691X https://www.sciencedirect.com/science/article/abs/pii/S0093691X00003599?via%3Dihub info:eu-repo/semantics/altIdentifier/doi/10.1016/S0093-691X(00)00359-9
institution Universidad Católica de Córdoba
institution_str I-38
repository_str R-144
collection Producción Académica Universidad Católica de Córdoba (UCCor)
language Español
orig_language_str_mv spa
topic SF Cultura de los animales
spellingShingle SF Cultura de los animales
Buratini, José
Price, C.A.
Visintin, Julio Antonio
Bó, G.A.
Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
topic_facet SF Cultura de los animales
description Follicle ablation has been recognized as an efficient method of follicular wave synchronization. Treatment with recombinant bovine somatotropin (BST) has been shown to enhance follicular development in Bos taurus. This experiment assessed the effects of these treatments in Nelore (B. indicus) heifers. Eight cycling Nelore heifers were randomly assigned to 3 different treatments. On Day 2 of a synchronized cycle (Day 0 = day of ovulation), heifers assigned to Treatments 1 and 2 received 2 mL of saline, whereas heifers assigned to Treatment 3 received 320 mg of BST. On Day 5, the first-wave dominant follicle was ablated by ultrasound-guided transvaginal aspiration in heifers in Treatments 2 and 3, and all heifers received an injection of prostaglandin on Day 11. Aspiration of the dominant follicle advanced and synchronized (P < 0.05) the day of second-wave emergence (6.9 ± 0.1 vs. 8.4 ± 0.4) and the day of the pre-wave FSH peak (6.0 ± 0.0 vs. 6.9 ± 0.4), and increased FSH peak concentrations (381 ± 21 vs. 292 ± 30; pg/mL; P < 0.01). Recombinant bovine somatotropin treatment caused a two-fold increase in plasma insulin-like growth factor-I (IGF-I) concentrations (P < 0.001) and resulted in a 36% increase in the number of small follicles (<5 mm; P < 0.001) compared with saline-treated heifers. In summary, in agreement with previous reports on B. taurus, dominant follicle aspiration synchronized ovarian follicular development, and BST treatment increased peripheral concentrations of IGF-I in Nelore heifers. Recombinant bovine somatotropin also increased the number of small follicles, but this response appeared to be inferior to that reported for B. taurus.
format Artículo
author Buratini, José
Price, C.A.
Visintin, Julio Antonio
Bó, G.A.
author_facet Buratini, José
Price, C.A.
Visintin, Julio Antonio
Bó, G.A.
author_sort Buratini, José
title Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
title_short Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
title_full Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
title_fullStr Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
title_full_unstemmed Effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (BST) on ovarian follicular development in Nelore (Bos indicus) heifers
title_sort effects of dominant follicle aspiration and treatment with recombinant bovine somatotropin (bst) on ovarian follicular development in nelore (bos indicus) heifers
publishDate 2000
url http://pa.bibdigital.ucc.edu.ar/3905/1/A_Buratini_Price_Visintin_B%C3%B3.pdf
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