Immunohistochemical detection of receptors for oestrogen and progesterone in endometrial glands and stroma during the oestrous cycle in Nelore (Bos taurus indicus) cows

Reproduction in Domestic Animals = Zuchthygiene
I MartinJ C P Ferreira

Abstract

The aim of the present study was to monitor endometrial distribution and concentrations of oestrogen receptors alpha (ER alpha) and progesterone receptors (PR) by immunohistochemistry in Nelore cows (Bos taurus indicus) during the oestrous cycle. Blood samples were collected for progesterone measurement and endometrial samples were taken from the uterine horn contra lateral to the corpus luteum in 16 cows at days 0 (ovulation), 5, 9, 13 and 19 of the oestrous cycle. Immunostaining evaluation for ER alpha and PR in the glandular epithelium and uterine stroma was performed by two methods: positive nuclei counting and staining intensity of the nuclei. Specific positive staining reactions for both receptors were limited to cell nuclei and they were not identified in the cytoplasm. The proportion of ER alpha positive nuclei had a temporal variation throughout the oestrous cycle in both cell types evaluated and was higher in uterine stroma than the glandular epithelium (p < 0.05). The greatest proportion of ER alpha stained nuclei was observed at oestrus and during the initial and mid luteal phase (days 5, 9 and 13) (p < 0.05) in the glandular epithelium and at days 0, 5 and 9 in the uterine stroma (p < 0.01). The proportion of PR po...Continue Reading

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Citations

Apr 21, 2010·Reproduction : the Official Journal of the Society for the Study of Fertility·L A OkumuP Lonergan
Feb 18, 2019·Biology of Reproduction·Zeinab LatifiAmir Fattahi
Jan 8, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Dody Houston BillhaqSeunghyung Lee
Dec 10, 2019·Systems Biology in Reproductive Medicine·George A PerryStephanie D Perkins

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