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Biology of Reproduction, Vol 18, 229-233, Copyright © 1978 by Society for the Study of Reproduction

Correlation Between Sea Urchin Sperm Respiratory Rates and Cyclic AMP Concentrations as a Function of Cell Dilution

GREGORY S. KOPF 1, and DAVID L. GARBERS 1

1 Departments of Pharmacology and Physiology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232


The adenosine 3',5'-monophosphate (cyclic AMP) levels and respiration rates of Strongylocentrotus purpuratus and Lytechinus pictus sea urchin sperm were estimated after various degrees of cell dilution. Dilution of L. pictus sperm caused substantial increases in both sperm cyclic AMP levels and respiratory rates. In contrast to L. pictus sperm, cyclic AMP levels and respiratory rates were elevated only slightly by dilution of S. purpuratus sperm. These results provide evidence for a positive relationship between endogenous cyclic AMP levels and respiratory rates in sea urchin spermatozoa.

Note:
ACKNOWLEDGMENTS We gratefully acknowledge the excellent technical assistance of Ms. D. Janette Tubb, Ms. Helen Davis Watkins, and Ms. Marvist A. Parks.

Submitted on May 25, 1977
Accepted on August 20, 1977






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Copyright © 1978 by the Society for the Study of Reproduction.