(A, B, C, D, E, F, G, H) The graphs show selected cytokines released from cancer cells grown for 48 h (A, B) or 2 wk (E, D) under the following conditions (A) and preincubated without (CM PC-3M−cit) or (B) with extracellular citrate (CM PC-3M+cit) and fibroblasts (C, D and G, H) transformed by the differentially treated cancer cells (C, G) CM F-PC−cit and (D) CM F-PC+cit (F, H) over 48 h or 2 wk, respectively. (A, B, D, E) The values of cytokines released by fibroblasts were obtained by subtracting the values of cytokines measured in conditioned media from cancer cells (A, B and E, D) from the values measured in the media from fibroblasts.