Fig. 5From: Safety and efficacy of the mesenchymal stem cell in feline eosinophilic keratitis treatmentAssessment of chondrogenic differentiation. Histological sections of pellets after 21 days in the absence (a-c) or presence (d-f) of rhTGF-β1. The degree of maturation after chondrogenic differentiation was assessed by TB, AB staining and type II collagen immunohistochemistry. Pellets incubated with rhTGF-β1 clearly displayed improved chondrogenesis. Bars, 200 μmBack to article page