One molecule, LIGHT (homologous to Lymphotoxin, exhibits Inducible expression and competes with HSV Glycoprotein D for binding to Herpesvirus entry mediator, a receptor expressed on T lymphocytes), also known as TNFSF14,6 is a cytokine that we have previously found to be involved in inflammation of the lungs in mouse models of asthma and pulmonary fibrosis.7–10. Here, TNFSF14 is linked to pulmonary fibrosis.