Effects of vasectomy and antisperm antibodies on human seminal fluid deoxyribonucleic acid polymerase activity Academic Article uri icon


MeSH Major

  • Antibodies
  • DNA-Directed DNA Polymerase
  • Semen
  • Spermatozoa
  • Vasectomy


  • DNA-synthesizing complexes possessing a sucrose buoyant density of 1.24 to 1.25 gm/ml were identified in cell-free human seminal fluids prior to and 1 to 3 months following division of the vasa deferentia, performed for fertility control in otherwise normal males. After vasectomy, there was a 3.5-fold decrease in endogenous DNA polymerase activity per ejaculate. Partial purification of the seminal fluid DNA polymerase by gel filtration revealed a similar 3.5-fold decrease in dT12--18-poly (rA)-templated DNA polymerase activity postvasectomy. Immunoglobulin G, isolated from a rabbit immunized with nuclei derived from detergent-treated ejaculated human spermatozoa, inhibited both sperm- and seminal fluid-derived DNA polymerase activity. The decrease in seminal fluid enzyme activity following vasectomy might be due to its inhibition by sperm autoantibodies induced after vas division.

publication date

  • January 1978



  • Academic Article



  • eng

PubMed ID

  • 640051

Additional Document Info

start page

  • 314

end page

  • 9


  • 29


  • 3