Download PDF
Exp Clin Endocrinol Diabetes 1995; 103(5): 332-338
DOI: 10.1055/s-0029-1211374
Original

© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York

Differences in expression of angiotensin II receptors and renin in porcine and bovine ovaries

A. H. Nielsen, A. Hagemann, B. Avery* , K. Poulsen
  • Department of Anatomy and Physiology, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
  • * Department of Clinical Studies and Reproduction, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Further Information

Publication History

Publication Date:
15 July 2009 (online)

Also available at
  PDF Download  Permissions and Reprints

Summary

The expression of angiotensin (Ang) II receptors, active renin and prorenin in porcine and bovine ovarian follicles and corpora lutea was investigated and compared.

In the wall tissue of porcine follicles, the Ang II receptor density was 47 (range 19—97; n = 13) fmol/mg membrane protein. The active renin concentration was 1.32 (0.40-3.43; n = 23) GU/kg wet tissue. These values were about 35-fold and 15-fold lower, respectively, than previously found in bovine follicles. No prorenin could be detected in the porcine follicular wall tissue.

Ang II receptors of subtype 2 (AT2 receptors) with a j dissociation constant (Kd) of 1.01 (0.64—1.79; n = 8) nmol/1 for [Sar1-Ile5-Ile8]-Ang II were demonstrated in 1 the bovine corpus luteum. The receptor density was 22.7 (1.9-93; n = 26) fmol/mg membrane protein, which was about 10-fold higher than in porcine corpora lutea. The active renin concentration was 20.7 (2.2—60.0; n = 26) GU/kg tissue in bovine and 0.40 (0.16—1.09; n = 17) GU/kg tissue in porcine corpora lutea. No prorenin could be detected in corpora lutea from both species. The variation between species in expression of the ovarian renin-angiotensin system indicates the existence of species differences in the physiological role.

Key words

Angiotensin II receptor - cattle - ovary - pig - prorenin - renin

      >