B7-H3通过通过HIF-1α调节HB-EGF来增强结直肠癌的进展
Chenrui Hu1,2,3,4,5, Shengjia Wang1,3,4,5, Jin Wang6
1Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China.
Journal of gastrointestinal oncology
|July 11, 2024
概括
B7-H3通过PI3K-AKT-mTOR-HIF-1α通路通过升调肝素结合性表皮生长因子 (HB-EGF) 来促进结直肠癌 (CRC) 的进展. 这种机制涉及HB-EGF调解CRC细胞增殖,入侵和血管生成.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- B7-H3 (CD276) 是一种在许多固体瘤中发现的辅助刺激分子,包括结直肠癌 (CRC).
- B7-H3的特定受体和细胞内功能尚未完全理解.
- 这项研究研究了B7-H3在CRC进展中的作用.
研究的目的:
- 阐明B7-H3促进结直肠癌 (CRC) 进展的机制.
- 调查肝素结合性表皮生长因子 (HB-EGF) 和缺氧诱导因子1α (HIF-1α) 在B7-H3介导的CRC进展中的作用.
- 探索B7-H3,HB-EGF和慢性结核病患者的临床参数之间的关联.
主要方法:
- 利用lentiviral转染来建立具有低B7-H3表达的CRC细胞.
- 进行基因表达特征分析,qRT-PCR和西部涂抹,以分析B7-H3,HB-EGF,HIF-1α和PI3K-AKT通路组件.
- 从CRC患者收集临床数据和样本,以将B7-H3和HB-EGF水平与疾病阶段和转移相关联.
主要成果:
- 降低B7-H3的调节导致CRC细胞系和组织中的HB-EGF水平显著降低.
- 在CRC患者中,B7-H3和HB-EGF表达与瘤结节转移 (TNM) 阶段和淋巴结转移相关.
- B7-H3通过PI3K-AKT信号通路调节HIF-1α,这反过来又控制了HB-EGF转录.
结论:
- B7-H3通过PI3K-AKT-mTOR-HIF-1α信号通路对HB-EGF进行上调来促进CRC的进展.
- HIF-1α作为终端转录因子,驱动HB-EGF表达和随后的细胞增殖,入侵和血管生成.
- 针对B7-H3/HB-EGF轴可能为结直肠癌提供治疗策略.
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