TNF and membranous glomerulonephritis: 7 Neale Neale TJ TJ Ruger Ruger BM BM Macaulay Macaulay H H Tumor necrosis factor-alpha is expressed by glomerular visceral epithelial cells in human membranous nephropathy Tumor necrosis factor-alpha is expressed by glomerular visceral epithelial cells in human membranous nephropathy Am J Pathol.