A study of the mechanism of lymphokine production and release.

The release of lymphokine, a "lymph node activating factor" is not accompanied by changes in the functions of lymphocytes bound on cell membrane, such as the capacity for E rosette formation, PHA responsiveness and induction of the transplantation reaction. Neither is it accompanied by nucleolar transformation which would suggest the changes in nucleolar RNA synthesis and protein synthesis. However, in mixed lymphocyte cultures from which the lymph node activating factor is released, the number of naked lymphocytes increases markedly.