TGFB1 and Increased total eosinophil count: As reported by Minshall and coworkers [65], many other studies performed in humans or in animals bear witness to the contention that eosinophils are a major cellular source of TGFβ1 in asthmatic lungs by demonstrating a linear relationship between the degree of eosinophilia and the expression of TGFβ1 in different lung tissues.