Metabolic phenotype of enzalutamide-resistant castration-resistant prostate cancer cells revealed by untargeted metabolomics
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摘要: 目的 采用超高效液相色谱-四级杆串联飞行时间质谱(UHPLC-Q-TOF/MS)法分析恩杂鲁胺耐药的去势抵抗性前列腺癌细胞(CRPC)原型成分及代谢产物,探讨恩杂鲁胺耐药CRPC所改变的代谢物和途径,为临床诊断和治疗提供帮助。方法 以液相色谱-质谱法(LC-MS)检测其CRPC细胞系C4-2和恩杂鲁胺耐药CRPC细胞系C4-2R,通过单因素分析和多因素(主成分分析及偏最小二乘回归分析法等)鉴定组间正、负离子模式下代谢谱差异,通过代谢物通路的关键富集分析揭示可能介导恩杂鲁胺耐药的异常代谢途径。结果 质量控制实验表明数据稳定可靠,代谢谱差异能显著反映组间样本的代谢组学差异。单因素和多因素结果表明显示出两组样本间代谢物具有显著差异,共分别鉴定出正离子和负离子模式下显著差异代谢物83个和71个,功能富集结果表明癌症多种生物合成等重要通路发生了显著变化,体现为过度消耗状态,并以癌症中的胆碱代谢最为显著,说明CRPC细胞中恩杂鲁胺耐药过程的胆碱代谢发生了显著上调,改变胆碱代谢途径可能为逆转CRPC恩杂鲁胺耐药提供更多证据。结论 恩杂鲁胺耐药使CRPC细胞的代谢谱发生显著改变,主要表现在能量代谢上的过度消耗,表现为以胆碱能代谢升高为主的过度消耗状态,从而为晚期前列腺癌的精准化、个性化诊治和长期药物管理提供新的方向。Abstract: Objective To analyze the prototype components and metabolites of enzalutamide-resistant castration-resistant prostate cancer(CRPC) cells by ultra-high performance liquid chromatography and quadrupole tandem time-of-flight mass spectrometry(UHPLC-Q-TOF/MS), and explore the metabolites and pathways altered by Enzalutamide-resistant CRPC for clinical diagnosis and treatment.Methods The CRPC cell line C4-2 and the Enzalutamide-resistant CRPC cell line C4-2R were detected by liquid chromatography-mass spectrometry(LC-MS). Univariate and multivariate analyses(including principal component analysis and partial least squares regression analysis) were used to identify differences in metabolic profiles between groups in positive and negative ion modes. The functional enrichment analysis of metabolite pathways revealed the abnormal metabolic pathways mediated by resistance of Enzalutamide for CRPC.Results The quality control experiments showed the stable data and reliable metabolomic differences between the groups. Univariate and multivariate results showed that there were significant differences in metabolites between the C4-2 and C4-2R cells. A total of 83 and 71 metabolites with significant differences in positive and negative ion modes were identified, respectively. The results of functional enrichment showed that the important pathways of various biosynthesis in cancers have undergone significant changes, which were reflected in the state of over-consumption, and choline metabolism in CRPC is the most significant. These findings indicated that the choline metabolism was significantly up-regulated during the Enzalutamide-resistance process in CRPC cells, and alteration of the choline metabolic pathway may provide more evidence for reversing the Enzalutamide-resistance in CRPC cells.Conclusion Enzalutamide resistance significantly changes the metabolic profile of CRPC cells, which is mainly manifested in the excessive consumption of energy metabolism. Enzalutamide-resistant CRPC cells were mainly manifested as an excessive consumption state with low cholinergic metabolism, which shed novel lights on the personalized diagnosis and treatment and long-term drug management of CRPC.
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