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Major histocompatibility complex ancestral haplotypes in the chimpanzee: identification using C4 allotyping
F T Christiansen1, R E Bontrop, M Giphart
1Department of Clinical Immunology, Royal Perth Hospital, Western Australia.
Human Immunology
|May 1, 1991
Summary
Major histocompatibility complex (MHC) ancestral haplotypes (AHs) found in humans also exist in chimpanzees. This suggests conserved MHC evolution across species, aiding comparative studies.
Area of Science:
- Immunogenetics
- Evolutionary biology
- Primatology
Background:
- Certain human major histocompatibility complex (MHC) supratypes represent ancient DNA segments inherited from a common ancestor.
- Investigating the presence of these ancestral haplotypes (AHs) in nonhuman primates can illuminate MHC evolutionary history.
Purpose of the Study:
- To determine if major histocompatibility complex (MHC) ancestral haplotypes (AHs) are present in chimpanzees.
- To compare chimpanzee MHC AHs with those found in humans.
Main Methods:
- Conducted C4 allotyping on 71 chimpanzees, including four large pedigrees.
- Identified at least seven codominant C4 alleles across two loci, including null alleles.
- Assigned class I, class II, and C4 alleles to 37 unrelated haplotypes.
Main Results:
- Identified several recurring supratypes in chimpanzees, suggesting the presence of putative ancestral haplotypes (AHs).
- Some identified chimpanzee AHs share alleles with known human AHs.
- Evidence suggests similar MHC AHs exist in both chimpanzees and humans.
Conclusions:
- Major histocompatibility complex (MHC) ancestral haplotypes (AHs) are conserved between humans and chimpanzees.
- This finding supports the presence of similar MHC AHs in related species.
- The study provides a foundation for comparative research on MHC evolution and function.