The mRNA expression levels of IgG4-nonspecific class switch-related molecules in CD3-positive T cells and CD20-positive B cells sorted from PBMCs. The displayed mRNA expression levels are relative to the mRNA level of GAPDH, representing the internal control. Data are expressed as mean ± SD. *P < 0.05; Mann-Whitney's U test. CD3, CD3-positive T cells sorted from PBMCs; CD20, CD20-positive B cells sorted from PBMCs; HC, healthy control; SS, Sjögren syndrome; IgG4, IgG4-RD.
Tsuboi et al. Arthritis Research & Therapy 2012 14:R171 doi:10.1186/ar3924