After being stained with different fluorescent antibodies, the CD3+CD4+CXCR5+CD45RA- T cells were gated. Subsequently, memory Tfh cells were gated on CCR7 expression and the frequency of CCR7+, CCR7+ICOS+, CCR7- and CCR7-ICOS+ memory Tfh cells was analyzed by flow cytometry and the numbers of each type of cells were calculated. (A) Flow cytometry analysis. (B) The numbers of CCR7+ memory Tfh cells in the HC, MS patients pre- and post-treatment. (C) The numbers of CCR7+ memory Tfh cells in the MS-CR patients pre- and post- treatment. (D) The numbers of CCR7+ memory Tfh cells in the MS-PR patients pre- and post-treatment. (E) The numbers of CCR7+ICOS+ memory Tfh cells in the HC, MS patients pre- and post-treatment. (F) The numbers of CCR7+ICOS+ memory Tfh cells in the MS-CR patients pre- and post-treatment. (G) The numbers of CCR7+ICOS+ memory Tfh cells in the MS-PR patients pre- and post-treatment. (H) The numbers of CCR7- memory Tfh cells in the HC, MS patients pre- and post-treatment. (I) The numbers of CCR7- memory Tfh cells in the MS-CR patients pre- and post- treatment. (J) The numbers of CCR7- memory Tfh cells in the MS-PR patients pre- and post-treatment. (K)The numbers of CCR7-ICOS+ memory Tfh cells in the HC, MS patients pre- and post-treatment. (L) The numbers of CCR7-ICOS+ memory Tfh cells in the MS-CR patients pre- and post-treatment. (M) The numbers of CCR7-ICOS+ memory Tfh cells in the MS-PR patients pre- and post-treatment. There was no significant difference in the numbers of CCR7-PD-1+, CCR7-PD-1+ICOS+, CCR7-CD40L+, CCR7+PD-1+, CCR7+PD-1+ICOS+, CCR7+CD40L+ memory Tfh cells between the patients and HC as well as in MS patients before and after treatment (data not shown). The horizontal lines indicate the median values for each group.