对儿童B细胞急性淋巴细胞白血病中MLL-AF9融合基因介导的化疗耐药性的分子洞察力
Xu Sang1, Yanchun Guan1, Mengying Jiang1
1Department of Pediatrics, The First Affiliated Hospital of Bengbu Medical University, Bengbu, Anhui, China.
The Journal of biological chemistry
|June 1, 2025
概括
患有MLL-AF9融合的儿童B细胞急性淋巴细胞白血病 (B-ALL) 通过上调IGFBP7,激活ABCB1载体和DNA修复来发展化学抵抗. 针对这些途径可以在模型中逆转阻力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 儿科B细胞急性淋巴细胞白血病 (B-ALL) 带来了重大治疗挑战,特别是涉及MLL-AF9融合基因的病例.
- 了解化学疗法耐药性的分子机制对于改善患者的治疗结果至关重要.
研究的目的:
- 阐明MLL-AF9融合基因在儿科B-ALL中赋予化疗耐药性的分子机制.
- 确定克服MLL-AF9阳性B-ALL.中化学抵抗的潜在治疗点.
主要方法:
- 从公共数据库 (GEO,TARGET) 中进行多态数据分析 (转录组).
- 权重基因联合表达网络分析 (WGCNA) 来识别关键基因.
- 在体外和体内实验,以验证发现和测试治疗干预措施.
主要成果:
- 鉴定出IGFBP7是一种由MLL-AF9上调的关键基因,激活ABCB1转运体和DNA-PKcs介导的非同类末端结合 (NHEJ) 修复途径.
- 过度表达MLL-AF9的B-ALL细胞对多克索鲁比辛,环胺和西斯普拉丁的敏感性降低.
- 增加的ABCB1和DNA-PKcs表达增强了MLL-AF9阳性细胞中的DNA修复和抑制了亡.
- 化学阻力被ABC输送抑制剂维拉帕米尔和NHEJ抑制剂NU7441.1逆转.
结论:
- 在儿科B-ALL中,MLL-AF9通过上调IGFBP7,从而激活ABCB1和NHEJ修复通路来驱动化疗抵抗.
- 准ABCB1和NHEJ通路为MLL-AF9阳性B-ALL提供了一个有前途的治疗策略.
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