Table 1.

FOXP1 isoforms expression after T-cell activation.

FOXP1 isoforms	Human CD8+	Human CD4+	Murine CD4+
FOXP1A (full-length)	downregulated; upregulated in TILs	downregulated	upregulated or no change; downregulated in iTregs
FOXP1D	unclear; upregulated in TILs	upregulated within 24h after activation; downregulated beyond 24h after activation	upregulated