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Updated: Jun 2, 2026

Use of Single Chain MHC Technology to Investigate Co-agonism in Human CD8+ T Cell Activation
Published on: February 28, 2019
Self/nonself perception, reproduction and the extended MHC.
Andreas Ziegler1, Pablo Sandro Carvalho Santos, Thomas Kellermann
1Institut für Immungenetik; Charité-Universitätsmedizin Berlin; Campus Benjamin Franklin; Freie Universität Berlin; Berlin, Germany.
Self/nonself perception guides mate selection, utilizing barriers to prevent costly fertilization with suboptimal genetics. The extended Major Histocompatibility Complex (xMHC) genes are crucial for immune function and may influence mate choice and reproductive success.
Area of Science:
- Reproductive Immunology
- Evolutionary Genetics
- Molecular Biology
Background:
- Mate selection in eukaryotes relies on self/nonself perception, employing pre-, during-, and post-copulatory barriers.
- These barriers prevent investment in embryos with suboptimal genetic and immunological properties, discouraging fertilization with shared alleles.
Purpose of the Study:
- To investigate the role of the extended Major Histocompatibility Complex (xMHC) in reproductive processes, particularly in self/nonself perception during mate selection.
- To explore how xMHC-encoded molecules influence mate choice, germ cell development, and embryonic/fetal life.
Main Methods:
- Focus on the human HLA complex and neighboring genes.
- Analysis of xMHC-encoded molecules involved in reproductive functions.
- Examination of polymorphic odorant receptor genes in reproductive tissues.
Main Results:
- Evidence suggests xMHC-specified molecules are involved in self/nonself perception during reproduction.
- Polymorphic odorant receptor genes, expressed in reproductive tissues, may guide sperm to oocytes.
- Linkage disequilibrium within xMHC preserves functionally connected alleles.
Conclusions:
- xMHC-encoded proteins play a significant role in various stages of mate choice, germ cell development, and embryonic/fetal life.
- Genes within the xMHC are crucial for both immune function and reproduction.
- Diverse, interconnected barriers highlight the importance of xMHC in vertebrate reproduction.
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