HLA Class II Alleles in Long-Standing Alopecia Totalis/Alopecia Universalis and Long-Standing Patchy Alopecia Areata Differentiate These Two Clinical Groups
Key Points
Graft-versus-graft alloreactivity after dUCBT involves recognition of mismatched HLA class II alleles by allele-specific CD4+ effector T cells. Alloreactive donor CD4+ T cells may recognize recipient leukemia if mismatched for individual HLA class II alleles.