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Biochemical property and immunogenicity of mouse male reproductive tract CD52 (mrt-CD52)
1Department of Obstetrics and Gynecology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
Abstract:
Male reproductive tract CD52 (mrt-CD52) is known to be a pathogenic antigen for immunological infertility. Although human CD52 has been extensively investigated, the properties of mouse CD52 are not well elucidated. This study was conducted, therefore, to examine the tissue distribution, molecular composition and immunogenicity of mouse mrt-CD52. Immunohistological studies with an antibody to a synthetic peptide showed that mouse CD52 was localized mainly in the cauda epididymis and vas deferens, but not in the testis, liver, kidney or spleen. The molecule was composed of Asn (N)-linked and The/Ser (O)-linked carbohydrates as well as a glycosylphosphatidyl (GPI) anchor portion. Purified mrt-CD52 preparations produced antibodies by subcutaneous and intranasal immunization in both male and female mice. These antisera showed sperm-immobilizing activities with complement to mouse sperm. The research indicated mouse CD52 had similar biochemical and immunological properties to human CD52. This animal experiment is a good model for investigating human mrt-CD52 antibody detected in infertile patients.
Insights
Mouse male reproductive tract CD52 (mrt-CD52) was characterized, revealing similar properties to human CD52. This finding supports its use as a model for studying immunological infertility.
Area of Science:
- Reproductive Immunology
- Molecular Biology
- Immunochemistry
Background:
- Male reproductive tract CD52 (mrt-CD52) is implicated in immunological infertility.
- Limited information exists regarding the specific properties of mouse mrt-CD52.
- Understanding mouse mrt-CD52 is crucial for developing relevant animal models.
Purpose of the Study:
- To investigate the tissue distribution of mouse mrt-CD52.
- To determine the molecular composition of mouse mrt-CD52.
- To assess the immunogenicity of mouse mrt-CD52.
Main Methods:
- Immunohistological studies using an antibody to a synthetic peptide.
- Analysis of molecular composition, including carbohydrate linkages and GPI anchor.
- Subcutaneous and intranasal immunization in mice to assess antibody production and activity.
Main Results:
- Mouse CD52 was localized primarily in the cauda epididymis and vas deferens.
- The molecule comprises N-linked and O-linked carbohydrates and a GPI anchor.
- Immunization generated antisera with sperm-immobilizing activity.
Conclusions:
- Mouse mrt-CD52 shares biochemical and immunological properties with human CD52.
- This study establishes a valuable animal model for investigating human mrt-CD52 antibodies.
- Findings contribute to understanding immunological infertility mechanisms.
