[Action of the sera from acute leukemia patients on lymphocytic transformation]

The authors examined in vitro the action of sera, obtained from patients with acute leucosis during the first attack and relapse on PHA (phytoheagglutinins)-M-reactivity of lymphocytes, obtained from healthy donors and olymphocytes obtained from leucemic patients. They found that sera inhibited in vitro the effects of PHA-M both on lymphocytes of patients and of healthy donors. There was stimulating effect of sera in vitro in single cases under autologic conditions.