Differentiation autoantigen of testicular cells and spermatozoa in the guinea pig

Kenneth S.K. Tung, Liang Po Bebe Han, Andrew P. Evan

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


Guinea pigs, immunized with autologous testes, produce antibody that reacts with surface antigen(s) of epididymal sperm and testicular cells. Both IgG and F(ab')2 fragments of the antibody molecules bind to testicular cells. Only 50% of the testicular cells had detectable surface antigens and they are identified by rosette formation with Staphylococcus aureus, which bind only to testicular cells and sperm coated with guinea pig IgG. Rosette-positive testicular cells (percentage of cells positive) are: early round spermatids (8%), oval late spermatids (98%), cytoplasmic droplets (93%), and heads (and midpieces) of testicular and epididymal sperm (100%). As determined by a quantitative cellular radioimmunobinding assay, antibody to testicular cells is absorbed by testis or sperm but not by other male or female guinea pig tissues. The antigen, which could be multiple, is therefore sperm and late spermatid specific, and is designated testicular cell-sperm differentiation autoantigen. The surface distribution of this antigen is modulated by antibody to exhibit temperature-dependent translational movement along the plasma membrane.

Original languageEnglish (US)
Pages (from-to)224-238
Number of pages15
JournalDevelopmental Biology
Issue number1
StatePublished - Jan 1979
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology
  • Cell Biology

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