CD4 and Huntington disease: We found that frequencies of CD4+RORγt+Th17/CD4+CCR6+Th17, CD4+GATA3+Th2, and CD4+Bcl-6+Tfh/CD4+CXCR5+Tfh cells were significantly increased in IgAVN patients compared with HD (Figures 5A–D).