CXCR3 and idiopathic pulmonary fibrosis: Additionally, other studies have shown a negative correlation between lung function (FVC, DLco, total lung capacity, and vital capacity) and CXCR3 expression, the receptor for CXCL10, on monocytes and a positive correlation between CXCR3 and CXCL10 in patients with non-IPF disease.31