A distinct subset of CD25 negative T-follicular regulatory cells localize in the germinal centers

We describe GC-Tfr, a population of CD25 negative Foxp3 positive CXCR5hiPD1hiBCL6hi T-follicular regulatory cells that preferentially localise in the germinal centers. Male C57BL/6 Foxp3-DTR-GFP reporter mice were vaccinated with NP-Ova in Alum and 7 days later cells sorted before RNA-sequencing. Analysis revealed that GC-Tfr have a gene expression pattern equidistant between Tregs and Tfh, but fundamentally retain their suppressive characteristics as regulatory cells.

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Wing JB, Kitagawa Y, Locci M, Hume H, Tay C, Morita T, Kidani Y, Matsuda K, Inoue T, Kurosaki T, Crotty S, Coban C, Ohkura N, Sakaguchi S