Plasma TPO levels in IL-6–treated cancer patients.

Circulating TPO levels in patients during 5-day continuous IL-6 infusion. Patients received 30 mg/kg per day rhIL-6. Venous blood was drawn, and plasma was analyzed for huTPO synthesis by specific ELISA. Data are expressed as mean ± SEM for n = 6. *P < .05 compared to baseline levels.