SpatiotemporaI distribution of oxytocin receptor in uterine tissues associated with corpus luteum location in cows


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Authors

  • S Tsuchiya
  • W A Cerbito
  • M P B Wijayagunawardane
  • A Miyamoto
  • M Takagi
  • K Miyazawa
  • K Sato

Keywords:

Corpus luteum(CL), Cow, Oxytocin receptors (OT -R), Regressing corpus luteum, Uterus

Abstract

The bovine uterine horns were characterized for local concentration and distribution of oxytocin receptor (OT·R) with reference to the location of the regressing corpus loteum, lntercaruncle endometrial and myometrial tissues were collected at spatially 3 different parts of the uterine horn (proximal, medial, distal) and I part in the body of the uterus. At follicular and postovulation stages, the distriblution of OT·R levels in endometrial tissues in relation to the regressing CL were not significantly different among locations but the OT·R levels in the uterine body were lower than in the uterine horns. Mean endometrial OT·R of ipsilateral horn to the regressing CL showed significantly higher (P<0.05) levels than contralateral horn at follicular stage. At postovulation, the OT·R levels in myometrium were not significantly different. Endometrial levels of OT·R were significantly higher (P<0.05) than myometrial levels at follicular stage. At postovulation, the OT·R levels in endometrial tissues were significantly lower (P<0.05) than at follicular stage, albeit, the myometrial levels did not differ signiticantly between stages. The results indicate differences in local concentration and distribution of OT-R in endometrial and myometrial tissues. Localized uterine levels of OT·R at follicular postovulation stages are related to the location of the regressing CL.

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How to Cite

Tsuchiya, S., Cerbito, W. A., Wijayagunawardane, M. P. B., Miyamoto, A., Takagi, M., Miyazawa, K., & Sato, K. (2012). SpatiotemporaI distribution of oxytocin receptor in uterine tissues associated with corpus luteum location in cows. The Indian Journal of Animal Sciences, 68(5). https://epubs.icar.org.in/index.php/IJAnS/article/view/20783