Fig. 1

Expression of TLR7 in LSGs from pSS patients and non-SS control subjects. A and D H&E staining in LSGs. B and C High expression of TLR7 in pSS patients. E and F The lower expression of TLR7 in non-SS patients. Total magnification ×100 (bar indicates approximately 100 μm). G Significant differences in the percentage of staining positivity were observed between pSS patients and non-SS sicca control subjects (34.61 ± 3.79%, 29.24 ± 4.22%, p < 0.001). ***P < 0.001. pSS, primary Sjögren’s syndrome; Non-SS, non-pSS patients. TLR7, Toll-like receptor 7