the cytokines receiving the most attention to date in relation to pulmonary diseases include platelet-derived growth factor ( pdgf ) , interleukin-1 ( il-1 ) , transforming growth factor-beta ( tgf-beta ) , tumor necrosis factor-alpha ( tnf-alpha ) , insulinlike growth factor i ( igf-i ) , and , most recently , interleukin-6 ( il-6 ) .
C0079189
cytokines
C0040690
transforming growth factor-beta