His research is focused on understanding pulmonary inflammation, lung injury and idiopathic pulmonary fibrosis (IPF). Recently Dr. Tager's laboratory published a seminal paper demonstrating that the lysophosphatidic acid receptor LPA1 links pulmonary fibrosis to lung injury by mediating fibroblast recruitment and vascular leak. The results suggested that lysophosphatidic acid is the chemoattractant predominantly responsible for recruiting fibroblasts into the lungs of IPF patients.