TGFB1 and eosinophilic esophagitis: Other ex vivo cell line investigations include utilization of primary EoE fibroblasts to assess the potential of thiazolidinediones to abrogate TGF-β mediated fibrosis, and a one-of-a-kind model utilizing an esophageal explant from cadavers allowing for functional examination of metrics such as tensile physiology (46, 47).