We found that epithelial cells, endothelial cells, macrophages, and fibroblasts in the fibrotic lungs express NEU3 [82,87], that NEU3, but not other sialidases, is upregulated in BAL fluid from pulmonary fibrosis patients and male and female mice at day 21 after bleomycin ([82,83], and observed elevated NEU3 in human fibrotic heart, kidney, and liver. The gene discussed is NEU3; the disease is pulmonary fibrosis.