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Related Experiment Videos

Serologically H-Y antigen-negative XO mice.

U H Wiberg, A Mayerová

    Journal of Immunogenetics
    |February 1, 1985
    PubMed
    Summary

    This study found that only XY male mouse tissues absorb H-Y antibodies, indicating the H-Y antigen is male-specific. XX and XO female tissues did not absorb these antibodies, confirming their absence.

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    Area of Science:

    • Immunogenetics
    • Mammalian genetics
    • Histocompatibility antigens

    Background:

    • The H-Y antigen is a cell surface antigen implicated in sex determination and immune responses.
    • Its presence is generally associated with the Y chromosome in mammals.
    • Understanding H-Y antigen expression is crucial for reproductive biology and transplantation immunology.

    Purpose of the Study:

    • To investigate the presence and tissue distribution of the H-Y antigen in mice with different sex chromosome constitutions (XX, XO, XY).
    • To determine if the H-Y antigen is exclusively expressed on male tissues.
    • To contribute to the understanding of H-Y antigen genetics and regulation.

    Main Methods:

    • Six independent experiments were conducted using organ homogenates from 35 mice (XX, XO, XY).
    • Homogenates were absorbed with three different anti-H-Y antisera raised in LEW rats.
    • Residual antibody activity was assessed using a complement-dependent cytotoxicity test on Raji cells.

    Main Results:

    • XX and XO female mouse tissues, including gonads, did not absorb H-Y antibodies.
    • XY male mouse tissue homogenates effectively absorbed H-Y antibodies at high concentrations (1/2 to 1/4).
    • These results strongly indicate that the H-Y antigen is present only in XY male tissues.

    Conclusions:

    • The H-Y antigen is confirmed to be male-specific, absent in XX and XO female mice.
    • The findings support the Y chromosome's role in H-Y antigen expression.
    • Further research is warranted on the potential existence of multiple H-Y antigens and their genetic regulation.

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