Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, Hubei Province, P. R. China.
Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, Hubei Province, P. R. China.
Theranostics. 2020 Jan 1;10(4):1555-1571. doi: 10.7150/thno.37383. eCollection 2020.
As a hallmark of metabolic reprogramming, aerobic glycolysis contributes to tumorigenesis and aggressiveness. However, the mechanisms and therapeutic strategies regulating aerobic glycolysis in neuroblastoma (NB), one of leading causes of cancer-related death in childhood, still remain elusive. : Transcriptional regulators and their downstream glycolytic genes were identified by a comprehensive screening of publicly available datasets. Dual-luciferase, chromatin immunoprecipitation, real-time quantitative RT-PCR, western blot, gene over-expression or silencing, co-immunoprecipitation, mass spectrometry, peptide pull-down assay, sucrose gradient sedimentation, seahorse extracellular flux, MTT colorimetric, soft agar, matrigel invasion, and nude mice assays were undertaken to explore the biological effects and underlying mechanisms of transcriptional regulators in NB cells. Survival analysis was performed by using log-rank test and Cox regression assay. : Transcription factor myeloid zinc finger 1 (MZF1) was identified as an independent prognostic factor (hazard ratio=2.330, 95% confidence interval=1.021 to 3.317), and facilitated glycolysis process through increasing expression of hexokinase 2 () and phosphoglycerate kinase 1 (). Meanwhile, a 21-amino acid peptide encoded by upstream open reading frame of , termed as MZF1-uPEP, bound to zinc finger domain of Yin Yang 1 (YY1), resulting in repressed transactivation of YY1 and decreased transcription of and downstream genes and . Administration of a cell-penetrating MZF1-uPEP or lentivirus over-expressing MZF1-uPEP inhibited the aerobic glycolysis, tumorigenesis and aggressiveness of NB cells. In clinical NB cases, low expression of MZF1-uPEP or high expression of , , , or was associated with poor survival of patients. : These results indicate that therapeutic targeting of / axis by MZF1-uPEP inhibits aerobic glycolysis and NB progression.
作为代谢重编程的标志,有氧糖酵解有助于肿瘤发生和侵袭。然而,在神经母细胞瘤(NB)中调节有氧糖酵解的机制和治疗策略仍然难以捉摸,NB 是儿童癌症相关死亡的主要原因之一。通过对公开数据集的全面筛选,确定了转录调节剂及其下游糖酵解基因。采用双荧光素酶报告基因检测、染色质免疫沉淀、实时定量 RT-PCR、Western blot、基因过表达或沉默、共免疫沉淀、质谱、肽下拉实验、蔗糖梯度沉降、 Seahorse 细胞外通量分析、MTT 比色法、软琼脂克隆形成、基质胶侵袭实验和裸鼠实验等方法研究转录调节剂在 NB 细胞中的生物学效应及其作用机制。采用对数秩检验和 Cox 回归分析进行生存分析。髓系锌指蛋白 1(MZF1)被鉴定为独立的预后因素(危险比=2.330,95%置信区间=1.021 至 3.317),通过增加己糖激酶 2()和磷酸甘油酸激酶 1()的表达促进糖酵解过程。同时,上游开放阅读框编码的 21 个氨基酸肽,称为 MZF1-uPEP,与 Yin Yang 1(YY1)的锌指结构域结合,导致 YY1 的转录激活受到抑制,和下游基因和的转录减少。细胞穿透性 MZF1-uPEP 或过表达 MZF1-uPEP 的慢病毒的给药抑制了 NB 细胞的有氧糖酵解、肿瘤发生和侵袭。在临床 NB 病例中,MZF1-uPEP 的低表达或、、、或的高表达与患者的不良生存相关。这些结果表明,通过 MZF1-uPEP 靶向/轴抑制有氧糖酵解和 NB 进展。
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