Human leukocyte antigen B*0702 is protective against ocular Stevens-Johnson syndrome/toxic epidermal necrolysis in the UK population.

Abstract	Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis (SJS/TEN) are part of a disease continuum of vesiculobullous mucocutaneous reactions affecting the skin and mucous membranes including the ocular surface. Manifestations of disease range from mild dry eye to progressive conjunctival cicatrisation, limbal epithelial stem cell failure and corneal blindness. In Far Eastern and South East Asian populations where SJS/TEN is prevalent, numerous human leukocyte antigen (HLA) gene variants at the A, B and C loci have been identified as risk factors for developing SJS/TEN with severe ocular complications (SOC). By contrast, the incidence of SJS/TEN with SOC in European countries is relatively low. To date, ocular SJS/TEN risk altering alleles have not been widely investigated in European populations. In this study, we analysed the association of HLA -A, -B and -C alleles with SJS/TEN in 33 patients residing in the UK with age matched controls. The data showed statistically significant novel negative allele association with HLA-B0702 and a trend with HLA-C0702 in the patient group, indicating these alleles are protective. Further characterisation of protective and risk alleles in other ethnic groups is required to fully elucidate the putative role of these alleles in the susceptibility of SJS/TEN with or without severe ocular complications in patients in the UK.
Authors	Gibran F Butt, Ali Hassan, Graham R Wallace, Shigeru Kinoshita, Sajjad Ahmad, Mayumi Ueta, Saaeha Rauz
Journal	Scientific reports (Sci Rep) Vol. 11 Issue 1 Pg. 2928 (02 03 2021) ISSN: 2045-2322 [Electronic] England
PMID	33536518 (Publication Type: Journal Article, Observational Study)
Chemical References	HLA-B*07:02 antigen HLA-B7 Antigen
Topics	Adolescent Adult Aged Alleles Child Child, Preschool Eye Diseases (epidemiology, genetics, immunology) Female Genetic Predisposition to Disease HLA-B7 Antigen (genetics, immunology) Humans Incidence Male Middle Aged Protective Factors Stevens-Johnson Syndrome (epidemiology, genetics, immunology) United Kingdom (epidemiology) Young Adult

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