passages.id: split_5_test_3482_passage
passages.type: progene_text
passages.text: Similarly , while the BTK - positive NALM - 6 human leukaemic B-cell precursor cell line showed no STAT3 activation after PV treatment and was exquisitely sensitive to PV - induced apoptosis , PV failed to induce apoptosis in BTK - deficient RAMOS - 1 human lymphoma B - cells that showed a robust STAT3 response .