Th1 associated molecules, especially INF-γ response transcription factor STAT1 as well as STAT1 regulated chemokines (IL-5, IL-7, IL-15, CCR5, CXCL9, CXCL10, and CXCL11) have been recognized as key inflammatory factors in sarcoidosis in transcriptome-wide analysis of lung, lymph nodes and peripheral blood (4, 5). Here, STAT1 is linked to sarcoidosis.