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HLA alleles modulate EBV viral load in multiple sclerosis.

Simone Agostini1, Roberta Mancuso2, Franca R Guerini2

  • 1Don C. Gnocchi Foundation IRCCS - ONLUS, Piazzale Morandi 3, 20121, Milan, Italy. sagostini@dongnocchi.it.

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Multiple sclerosis (MS) patients show higher Epstein Barr Virus (EBV) loads, particularly with HLA-B*07 alleles. This suggests a potential role for EBV in MS pathogenesis, influenced by specific human leukocyte antigen (HLA) variations.

Keywords:
Epstein-Barr virusHLA-A*02HLA-B*07HLA-class I allelesImmunogeneticsMultiple sclerosis

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Area of Science:

  • Immunogenetics
  • Virology
  • Neuroimmunology

Background:

  • Multiple sclerosis (MS) pathogenesis involves complex interactions between genetic and environmental factors.
  • Human Leukocyte Antigen (HLA) alleles are strongly associated with MS susceptibility.
  • Epstein Barr Virus (EBV) infection is a suspected environmental factor in MS development.

Purpose of the Study:

  • To investigate the correlation between specific HLA alleles and EBV viral load (VL) and antibody titers in MS patients.
  • To determine if HLA type influences EBV infection markers in individuals with MS.

Main Methods:

  • Evaluated HLA alleles, EBV VL, and anti-EBV antibody titers in 117 MS patients and 89 healthy controls (HC).
  • Compared EBV markers between MS patients and HC, and analyzed associations with specific HLA alleles (HLA-A*02, HLA-B*07, HLA-DRB1*15).

Main Results:

  • MS patients exhibited significantly higher EBV DNA VL and EBNA-1 antibody titers compared to HC.
  • Specific HLA alleles, notably HLA-B*07 and HLA-DRB1*15, were associated with increased EBV VL in MS patients.
  • HLA-B*07 was identified as the most significant allele associated with EBV VL via multiple regression analysis.

Conclusions:

  • The HLA-B*07 allele significantly influences EBV viral load in multiple sclerosis patients.
  • These findings support a potential role for EBV in MS pathogenesis, possibly mediated by HLA-class I antigen presentation.
  • Further research into the interplay of HLA genetics and EBV infection in MS is warranted.