| Intermittent nutritional stimulus by short-term treatment of high-energy diet promotes ovarian performance together with increases in blood levels of glucose and insulin in cycling goats. | |
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MedLine Citation:
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PMID: 20961717 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The aim of this study was to determine if short-term intermittent treatments of high-energy diet have any stimulatory effects on ovarian function and metabolic status in goat. Cycling Shiba goats were divided into treatment (TG; n=6) and control (CG; n=6) groups. After the detection of ovulation (1st ovulation, Day 0) by ultrasonography, a high-energy diet (250% of maintenance) was fed to the TG from Day 12 to Day 15 (4 days) and from Day 18 to Day 21 (4 days). The high-energy diet comprised 1000 g hay-cubes and 300 g of concentrated feed/head/day (approximately 15 MJ of digestible energy/day). The CG was offered maintenance diet throughout the experiment. Transrectal ultrasound examinations were conducted every other day during the luteal phase and were conducted daily during the follicular phase. Blood samples were collected daily from Day -2 to 7 days after ovulation (2nd ovulation) following the nutritional treatment for analysis of follicle stimulating hormone (FSH), progesterone, oestradiol, glucose and insulin in plasma. Two wave-like rises in the concentrations of glucose and insulin appeared in response to the intermittent nutritional stimulus. Mean plasma concentrations of glucose and insulin were significantly (P<0.05) higher in the TG than in the CG on almost all days during each treatment period. For ovarian performance, the total number of follicles that developed on the day prior to the 2nd ovulation in the TG (7.5 ± 2.7) was significantly higher than that of the CG (4.5 ± 2.6). Ovulation rate of the 2nd ovulation (4.5 ± 1.0) in the TG was significantly higher than that of the 1st ovulation (3.0 ± 0.6) of the TG and than both 1st (2.5 ± 0.5) and 2nd (2.7 ± 0.5) ovulations of the CG. No significant difference was detected in the concentrations of FSH, progesterone and oestradiol throughout the experiment between TG and CG. The present experiment demonstrated that short-term intermittent nutritional stimulus from the luteal phase increased the total number of ovulatory follicles and the ovulation rate in association with increasing plasma concentrations of glucose and insulin in goats. |
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Authors:
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Jahid Zabuli; Tomomi Tanaka; Wengeng Lu; Hideo Kamomae |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-09-29 |
Journal Detail:
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Title: Animal reproduction science Volume: 122 ISSN: 1873-2232 ISO Abbreviation: Anim. Reprod. Sci. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-12-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7807205 Medline TA: Anim Reprod Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 288-93 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Laboratory of Veterinary Reproduction, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai, Fuchu, Tokyo 183-8509, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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