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HLA-G: Function, polymorphisms and pathology.

Antonio Arnaiz-Villena1, Ignacio Juarez1, Fabio Suarez-Trujillo1

  • 1Departamento de Inmunología, Facultad de Medicina, Universidad Complutense, Madrid, Spain.

International Journal of Immunogenetics
|October 1, 2020
PubMed
Summary

Human Leukocyte Antigen-G (HLA-G) immune modulatory functions, polymorphism, and pathology are under intense research. This review highlights confirmed facts and questions the future of HLA-G disease association studies due to historical precedents.

Keywords:
GVHDHLA-GMHC-Cabortionallelesautoimmunitycancerdiseaseeclampsiafertilityhaplotypesinfectionisoformsmiscarriagemonkeysnullpathologyphylogenypolymorphismpregnancyprimatestransplantation

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Human Leukocyte Antigen (HLA) research

Background:

  • Human Leukocyte Antigen-G (HLA-G) is a non-classical MHC class I molecule with significant immune modulatory functions.
  • Extensive research is ongoing globally, producing a vast body of literature on HLA-G.
  • The field faces challenges in synthesizing confirmed findings amidst an overwhelming number of publications.

Purpose of the Study:

  • To consolidate established facts regarding HLA-G function, polymorphism, and pathology.
  • To identify and emphasize overlooked or under-remarked aspects of HLA-G research.
  • To critically evaluate the future prospects of HLA-G disease association studies.

Main Methods:

  • Comprehensive literature review focusing on consensus findings.
  • Critical analysis of published data on HLA-G.
  • Comparative assessment of HLA-G research with historical HLA molecule studies.

Main Results:

  • Key confirmed aspects of HLA-G's role in immune modulation, genetic variations, and pathological relevance are presented.
  • Certain under-appreciated facets of HLA-G research are brought to the forefront.
  • The study raises questions about the efficacy of solely pursuing HLA-G disease associations for definitive answers.

Conclusions:

  • Consolidating established knowledge on HLA-G is crucial for advancing the field.
  • A critical perspective on research methodologies, particularly disease association studies, is warranted.
  • The long-term utility of HLA-G association studies in diagnostics or therapeutics remains uncertain, mirroring challenges faced with classical HLA molecules.