CD8A and Arthritis: Previous studies have described that HLA-B27-restricted T cells could be responsive to self-antigens and arthritis-implicated antigens, resulting in autoimmune inflammation.155,156 Researchers have found that CD8+ T cells could respond to peptides LMP2 236-244 and VIP1R 400-408 for HLA-B2705 and HLA-B2709 individuals via this pathomechanism.157 CD8+ T cells could cause the direct lysis of target cells by CTLs via the secretion of perforin/granzyme or Fas/FasL signaling.