“…At the present time, these alterations are only partially understood, despite the fact that profound suppression of cell-me diated responses has been widely observed. Some in vestigators report that peripheral blood lymphocytes (PBL) taken from renal failure patients are themselves defective [6][7][8][9][10], while others show that the suppres sive factors present in uremic serum are responsible for the observed suppression [11][12][13][14], It has been determined that patients on hemodialy sis have a high rate of infections [15][16][17], cutaneous anergy [18][19][20], altered response to hepatitis B infec tions [21][22][23][24][25][26][27], and an increased rate of malignancies [28][29][30][31][32][33]. Several studies have found the suppressive ef fect to be nondialyzable [9,10,27,34], while others have reported improvement after hemodialysis [13,14], Studies of the immune response in the uremic ani mal model have indicated that experimentally in duced renal failure has suppressive activity on the various parameters of CMI [35][36][37][38][39][40][41], Recent observa tions from our laborat...…”