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Stability and Structure of Bat Major Histocompatibility Complex Class I with Heterologous β2-Microglobulin
Published on: March 10, 2021
Immunoglobulin heavy chain locus duplication in bats
Taylor Pursell1,2, Ashley Reers3, Artem Mikelov1
1Department of Pathology, Stanford University, Stanford, CA 94305, USA.
Science Advances
|July 29, 2026
Summary
Bats possess dual immunoglobulin heavy chain (IgH) loci, unlike other mammals. This unique genetic architecture influences antibody diversity and immune responses to viruses, impacting zoonotic disease research.
Area of Science:
- Immunology
- Genetics
- Virology
Background:
- Bats are significant reservoirs for viruses with zoonotic potential.
- Antibody-mediated immunity is crucial for viral evolution and immune evasion but is understudied in bats.
- Mammals typically possess a single immunoglobulin heavy chain (IgH) gene locus.
Purpose of the Study:
- To investigate the immunogenetic architecture of bats, specifically the immunoglobulin heavy chain (IgH) gene loci.
- To understand the implications of bat IgH loci variation on antibody diversity and function.
- To establish a foundation for studying humoral immunity and pathogen response in bats.
Main Methods:
- Genomic analysis across 26 bat species to identify IgH loci.
- Single-cell transcriptomics in the model species *Eptesicus fuscus*.
- Confirmation of functional rearrangement and expression of dual IgH loci.
Main Results:
- Identification of dual IgH loci on separate chromosomes in 26 bat species.
- Demonstration of distinct mechanisms for antibody diversity generation from each locus in *Eptesicus fuscus*.
- Evidence of functional rearrangement and expression of both IgH loci.
Conclusions:
- Bats exhibit extreme variation in immunogenetic architecture with dual IgH loci.
- These findings reveal novel mechanisms for antibody diversity in bats.
- This study provides a basis for future research into bat immunity and zoonotic virus transmission.
