SciELO - Scientific Electronic Library Online

 
vol.32 issue3Morphological Distinguish of Rupture Status between Sidewall and Bifurcation Cerebral Aneurysms author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

VASCONCELLOS, Adriana; CISTERNAS, Carla  and  PAREDES, Marco. Comparative Inmunohistochemical Study of Estrogen Receptor in Endometrial Tissue from Texel and Araucana Sheeps. Int. J. Morphol. [online]. 2014, vol.32, n.3, pp.1120-1124. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022014000300060.

In breeding sheep high fertility rate is an important consideration factor. The association of genetic, nutritional and environmental conditions directly affects the fertility of ewes. There are high fertility sheep breeds (Texel, Suffolk) and other standard fertility breeds as (Romney, Criolla Araucana). Animal reproduction is modulated by sex hormones that act by binding to specific receptors. In sheep, alpha (ER-a) estrogen receptor is widely distributed in the reproductive system, modulating several mechanisms associated with reproductive system function. One factor possibly related to the difference in fertility between sheep breeds, is the differential expression level of these receptors in the reproductive system. In the present study a quantitative comparison of the immunohistochemical expression of ER-a was carried out in prepubertal sheep endometrium in high fertility (Texel) breed versus standard fertility (Araucana) breed, by measuring the integrated optical density in specific areas of the endometrium. Results indicate a significant difference between ER-a expression in endometrium off Texel breed ewes and Araucana breed ewes, and registered higher levels in all areas of evaluated Texel breed prepubertal ewes. This differential expression suggests a possible link between ER-a expression intensity and fertility in the breeds studied in this work.

Keywords : Alpha estrogen receptor; ER-a; prolificity; Texel; Criolla araucana.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License