passages.id: split_8_test_1443_passage
passages.type: progene_text
passages.text: We found that , unlike wild - type ( WT ) BMM , LPS - treated IFNAR1 -/- cells failed to produce nitric oxide ( NO ) , or express inducible NO synthase ( iNOS ) , indicating that type I IFNs are essential for all LPS - stimulated NO production in BMM .