CXCL10 and idiopathic pulmonary fibrosis: However, in our study, MMP-8 BALF levels do not correlate indirectly with BALF levels of MIP-1α or IP-10 in IPF patients, suggesting that these chemokines may not be MMP-8 substrates and/or MMP-8 has other pro-fibrotic activities in IPF lungs.