| Changes in follicular blood flow and nitric oxide levels in follicular fluid during follicular deviation in cows. | |
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MedLine Citation:
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PMID: 21292411 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Two experiments were conducted to test the hypothesis that there are dynamic changes in follicular blood flow during follicular deviation and that nitric oxide (NO) in follicular fluid (FF) plays a role in regulation of follicular blood flow. In Experiment I, follicular blood flow of the two largest follicles was monitored by using Power Doppler ultrasonography during follicular deviation in sixteen follicular waves during eight estrous cycles in eight cows. Blood flow did not differ (P>0.05) between the dominant follicle (DF) and the largest subordinate follicle (SF) until the beginning of the deviation of the follicular size, but was higher (P<0.05) in DF than in the largest SF one and two days after the beginning of diameter deviation in ovulatory (n=5) and atretic (n=11) waves; respectively. In Experiment II, FF was aspirated from DF and the largest SF on the day of diameter deviation (DF, n=6; SF, n=6) and two days later (DF, n=12; SF, n=9). Nitric oxide did not differ (P>0.05) between DF and the largest SF on the day of diameter deviation but, one or two days after observed diameter deviation NO concentrations were lower (P<0.01) in DF compared to the largest SF. On the day of diameter deviation and two days later E2 levels in FF were higher (P<0.01) in DF than in the largest SF. P4 concentrations in FF were higher (P<0.05) in DF than in the largest SF on the day of diameter deviation, but did not (P>0.05) differ two days later. E2/P4 ratio in FF was the same (P>0.05) in DF and the largest SF on the day of diameter deviation, but was higher (P<0.01) in DF than in the largest SF one or two days later. In conclusion, area of follicular blood flow of DF and the largest SF increased in parallel with follicular size during follicular deviation. Furthermore, there were relationships between changes in follicular blood flow, NO concentrations and E2/P4 ratio in FF following the beginning of diameter deviation in cattle. |
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Authors:
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S M Pancarcı; O Güngör; O Atakişi; Y Ciğremiş; U Ç Arı; H Bollwein |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-14 |
Journal Detail:
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Title: Animal reproduction science Volume: - ISSN: 1873-2232 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-2-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7807205 Medline TA: Anim Reprod Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Obstetrics & Gynecology and Reproduction, Faculty of Veterinary Medicine, Kafkas University, Kars, Turkey. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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