VDR and pulmonary fibrosis: However, our integrated bioinformatics analysis, using twelve GEO datasets of murine models of bleomycin-induced pulmonary fibrosis, two GEO datasets of lung fibroblasts isolated from bleomycin-treated mice, and one GEO dataset of single-cell RNA-seq of bleomycin-treated mice, suggests that VDR is specifically upregulated in lung fibroblasts during bleomycin-induced pulmonary fibrosis.