Journal
VETERINARY QUARTERLY
Volume 34, Issue 2, Pages 113-117Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01652176.2014.953264
Keywords
cow: cattle; follicular cyst; oxidative stress; progesterone
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Funding
- Honda Foundation
- Dairy Research Foundation
- The University of Sydney International Postgraduate Research Scholarship
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This study was conducted to examine the oxidative stress biomarkers in a cow diagnosed with a follicular cyst in her left ovary. Progesterone (P4) and plasma oxidative stress status was measured in 13 Holstein cows after synchronization of oestrus with controlled internal drug release (CIDR) and prostaglandinF2 alpha (PGF2 alpha) protocol. The presence and size of ovarian structures were monitored by transrectal ultrasound at 4 hourly intervals. Of the 13 cows, 12 were monitored until ovulation was detected and recorded, whereas one cow failed to ovulate and developed a follicular cyst. Oxidative stress biomarkers; reactive oxygen metabolites (ROMs), biological antioxidant potential (BAP), oxidative stress index (OSI), glutathione (GSH), ceruloplasmin and advanced oxidation protein products (AOPP) were measured in the cystic cow and compared to those of the 12 ovulated cows and are referred to as higher or lower if they are outside the mean +/- standard error of mean of those of ovulated cows. The cystic cow had lower ROMs and OSI between 36 and 84 h after PGF2 alpha injection and at 9 h, from 36 to 60 h after PGF2 alpha injection respectively. On the other hand, antioxidant (BAP and GSH) was higher in the cystic cow compared to her ovulated herd mates. The observed imbalance between oxidant and antioxidant might have disrupted the physiological events for ovulation to occur, leading to cystic ovarian disease.
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