Skip to main content
SpringerLink
Log in

Effect of continuous illumination on secretion of pregnane compounds by the rat ovary

  • Short Communications
  • Published:
Experientia Aims and scope Submit manuscript

Summary

Differences in the secretion of pregnance compounds from rats with follicular polycystic ovaries under constant light and with normal preovulatory ovaries under light-dark conditions were compared. The injection of LH greatly increased the secretion of progesterone. 5α-pregnane-3,20-dione and 3α-hydroxy-5α-pregnan-20-one, in both types of ovaries, but the response of the two progesterone metabolites in the polycystic ovaries was low, suggesting low 5α-reductase activity.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

References

  1. Ichikawa, S., Morioka, H., and Sawada, T., Endocrinology88 (1971) 372.

    Article  CAS  PubMed  Google Scholar 

  2. Ichikawa, S., Morioka, H., and Sawada, T., Endocrinology90 (1972) 1356.

    Article  CAS  PubMed  Google Scholar 

  3. Ichikawa, S., Sawada, T., Nakamura, Y. and Morioka, H., Endocrinology94 (1974) 1615.

    Article  CAS  PubMed  Google Scholar 

  4. Murphy, L.L., and Mahesh, V.B., Biol. Reprod.32 (1985) 795.

    Article  CAS  PubMed  Google Scholar 

  5. Sanyal, M.K., and Todd, R.B., Proc. Soc. exp. Biol. Med.141 (1972) 622.

    Article  CAS  PubMed  Google Scholar 

  6. Barraclough, C.A., Rec. Prog. Horm. Res.22 (1966) 503.

    CAS  PubMed  Google Scholar 

  7. Bratt, H., Pupkin, M., Lloyd, C.W., Weisz, J., and Balough, K. Jr, Endocrinology83 (1968) 329.

    Article  CAS  PubMed  Google Scholar 

  8. Weisz, J., and Lloyd, C.W., Endocrinology77 (1965) 735.

    Article  CAS  PubMed  Google Scholar 

  9. Sawada, T., and Kosaka, T., Exp. Anim.30 (1981) 487.

    Article  CAS  Google Scholar 

  10. Ichikawa, S., Morioka, H. and Sawada, T. Bull. Univ. Osaka Pref. Ser. B22 (1970) 1.

    Google Scholar 

  11. Steel, R.G.D., and Torrie, J.H., Principles and Procedures of Statistics, p. 67. McGraw-Hill, New York 1960.

    Google Scholar 

  12. Balough, K. Jr., J. Histochem. Cytochem.12 (1964) 670.

    Article  Google Scholar 

Download references

Author information

Author notes

  1. T. Kosaka

    Present address: Institute of Environmental Toxicology, Suzuki-cho 2-772, 187, Kodaira-shi, Tokyo, Japan

Authors and Affiliations

  1. Department of Animal Reproduction, College of Agriculture, University of Osaka Prefecture, 591, Sakai, Osaka, Japan

    T. Kosaka, T. Sawada & S. Ichikawa

Authors
  1. T. Kosaka
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. T. Sawada
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. S. Ichikawa
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Acknowledgments. The authors thank the Endocrinology Study Section, NIADDK, Bethesda, MD, USA. for their gift of LH. This study was supported by Research Grant No. 466 154 from the Ministry of Education, Science, and Culture, Japan.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kosaka, T., Sawada, T. & Ichikawa, S. Effect of continuous illumination on secretion of pregnane compounds by the rat ovary. Experientia 44, 43–45 (1988). https://doi.org/10.1007/BF01960239

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01960239

Key words

Search

Navigation