passages.id: split_5_test_3231_passage
passages.type: progene_text
passages.text: This inhibitory activity of IL-17 ( IC50 = 0.2 ng / ml ) was 6 - fold more potent than its stimulatory activity on TNF-alpha - induced IL-6 secretion ( ED50 = 1.2 ng / ml ) , measured in the same cells .