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Article
Characterization of human sperm antigens reacting with anti-sperm antibodies from an infertile female patient's serum
Journal of andrology
  • H. L. Feng
  • Y. B. Han
  • Amy E.T. Sparks, University of Iowa
  • J. I. Sandlow
Document Type
Article
Peer Reviewed
1
Publication Date
7-1-2008
NLM Title Abbreviation
J Androl
PubMed ID
18359754
DOI of Published Version
10.2164/jandrol.108.004903
Abstract

Identification of sperm antigens that elicit immunoglobulin (Ig) production and knowledge of their roles in sperm transport and fertilization may enhance diagnosis and treatment of immunologic infertility. Sperm antigens recognized by a female patient's serum anti-sperm antibodies were characterized using an indirect immunobead-binding test, immunoblot analysis, and immunochemical labeling. The anti-sperm antibodies' effect on sperm function was evaluated by acrosome induction by calcium ionophore. Immunobeads specific for IgG were bound to the head of 79% of motile donor sperm. Immunochemical labeling of antibody-binding sites was restricted to the plasma membrane over the acrosomal crescent. No labeling was observed on the inner acrosomal membrane of acrosome-reacted sperm. The antibodies reacted with 35-, 40-, 47-, and 65-kd proteins extracted from acrosome-intact donor sperm. Sperm incubated in 1:4, 1:8, 1:16, and 1:32 dilutions of anti-sperm antibody-positive serum had similar rates of spontaneous acrosome reaction and significantly lower rates of ionophore-induced acrosome reaction compared with sperm incubated in control serum. These results suggest that sperm antigens recognized by the patient's serum anti-sperm antibodies are restricted to the acrosomal region of the plasma membrane. The antibodies may impair fertility by compromising the sperm's ability to undergo capacitation and/or acrosome reaction.

Keywords
  • Acrosome/immunology/ultrastructure,
  • Acrosome Reaction/immunology,
  • Antigens,
  • Surface/immunology,
  • Blotting,
  • Western,
  • Female,
  • Humans,
  • Immunoglobulin G/blood/immunology,
  • Immunohistochemistry,
  • Infertility,
  • Female/blood/immunology,
  • Male,
  • Microscopy,
  • Electron,
  • Transmission,
  • Middle Aged,
  • Spermatozoa/immunology/ultrastructure
Published Article/Book Citation
Journal of andrology, 29:4 (2008) pp.440-448.
Citation Information
H. L. Feng, Y. B. Han, Amy E.T. Sparks and J. I. Sandlow. "Characterization of human sperm antigens reacting with anti-sperm antibodies from an infertile female patient's serum" Journal of andrology Vol. 29 Iss. 4 (2008) p. 440 - 448 ISSN: 1939-4640
Available at: http://works.bepress.com/amy_sparks/72/