Küper C, Bartels H, Fraek M, Beck FX, Neuhofer W. Ectodomain shedding of pro-TGF-α is required for COX-2 induction and cell survival in renal medullary cells exposed to osmotic stress. American Journal of Physiology-Cell Physiology. 2007 Dec;293(6):C1971–82. doi: 10.1152/ajpcell.00404.2007.