The expression of NFAT5 mRNA in sections from patients with RA by in situ hybridization. This figure shows antisense (a,b) and sense (c) staining, respectively. The positive signal was observed not only in fibroblast-like cells (arrowheads) but also in osteoclast-like cells (arrows). We also performed HE staining (d) in serial sections. The original magnifications are 200× (a,c,d) and 400× (b), respectively.