IL6 and idiopathic pulmonary fibrosis: These LR-MSC-derived factors might include Il-6 and Il-1b, pro-inflammatory cytokines involved in body weight maintenance [41,42], that are overexpressed in IPF LR-MSC [23], and sustained or increased in the lungs of BLM-treated mice irrespective of using BM- [40] or LR-MSC (present study) from IPF patients.