Inhibition of the E-rosette formation of T-lymphocytes by aggregated human IgG and restoration by levamisole.

Aggregated human IgG significantly inhibited the E-rosette formation of T lymphocytes of healthy subjects and cancer patients. The aggregated IgG induced inhibition of rosette forming cells depended on the time of preincubation at 37 degrees. Levamisole, an anti-anergic chemotherapeutic agent, could partly but significantly prevent the aggregated IgG induced inhibition of the E-rosette formation.