despite the reduced synthesis of the t cell growth factors il-2 and il-4 , the proliferative responses of the pbl of the patients were in the normal range , which is compatible with the finding that il-2 and il-4 have synergistic effects on lymphocyte proliferation , particularly when one of these lymphokines is present at suboptimal concentrations .
C0021764
il-2
C0021758
il-4