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Endobronchial Ultrasound-guided Intratumoral Injection of Cisplatin for the Treatment of Isolated Mediastinal Recurrence of Lung Cancer
Published on: February 12, 2017
Ru3: a novel ruthenium-based compound overcomes cisplatin resistance in non-small cell lung cancer via the
Yiting Lu1,2, Shiming Wu3,4, Ying Jiang2
1Department of General Surgery, Chongqing Academy of Medical Sciences, Chongqing General Hospital, School of Medicine, Chongqing University, Chongqing, 401120, China.
Abstract:
Cisplatin resistance remains a major hurdle in non-small cell lung cancer (NSCLC) treatment. Here, we designed and synthesized a novel ruthenium-based compound, which selectively kills cisplatin-resistant NSCLC cells while sparing parental cells. Mechanistically, Ru3 triggers mitochondrial damage and reactive oxygen species (ROS) accumulation. In addition, it upregulates the transcription factor E2F2, which directly represses IGFBP3 expression. IGFBP3 normally scavenges ROS via the GPX4 system; thus, E2F2-mediated IGFBP3 suppression disrupts this antioxidant defense, exacerbating ROS levels and cell death. Notably, cisplatin-resistant cells exhibit elevated GPX4 and IGFBP3 expression, making them particularly vulnerable to Ru3. This study elucidates the E2F2-IGFBP3-GPX4 axis as a novel therapeutic vulnerability and highlights Ru3 as a promising agent for refractory NSCLC.