目的 探讨外泌体环状RNA circRPS6（hsa_circ_0086471）在结直肠癌（CRC）患者血清中的表达水平及其临床应用价值。 方法 收集河南省人民医院2019年1月15日至2020年12月31日就诊的115例CRC患者血清标本，其中男性68例，女性47例，年龄（63.0±9.5）岁；收集同时期120名健康体检者外周血清标本，其中男性70名，女性50名，年龄（61.0±10.7）岁。此外收集60例接受手术治疗的CRC患者癌及癌旁组织标本。实时荧光定量聚合酶链反应（RT-qPCR）法检测血清外泌体及组织中circRPS6的相对表达水平，并分析其与患者临床病理特征及预后的相关性。电化学发光法检测血清中CEA及CA19-9水平。采用受试者工作特征（ROC）曲线评价不同血清学指标的诊断效能。采用Cox比例风险模型进行多变量回归分析。 结果 CRC患者癌组织中circRPS6的相对表达水平（3.14±0.11）高于癌旁组织（1.97±0.09）（Z=5.38，P<0.001），血清外泌体中circRPS6的相对表达水平（4.28±0.13）高于健康对照组（2.04±0.09）（t=14.52，P<0.001）。ROC曲线分析结果显示，血清外泌体circRPS6诊断CRC的曲线下面积（AUC）为0.882，高于CEA、CA19-9检测对 CRC 患者的诊断效能。血清外泌体circRPS6相对表达量与TNM分期、淋巴结转移以及远处转移呈正相关（P均<0.05）。生存曲线分析显示血清外泌体circRPS6低表达患者平均生存时间明显优于高表达患者，进一步多变量回归分析发现血清外泌体circRPS6高表达是CRC患者预后不良的独立危险因素。 结论 外泌体circRPS6在CRC患者血清中高表达，且与恶性进展和不良预后相关，有望成为CRC患者诊断和预后评估的潜在标志物。 Objective To investigate the expression and clinical application value of exosomal circRPS6 in serum of colorectal cancer (CRC) patients. Methods Peripheral serum samples were collected from 115 CRC patients admitted to Henan Provincial People′s Hospital from January 2019 to December 2020. There were 68 males and 47 females, aged (63.0±9.5) years. Meanwhile, one hundred and twenty healthy subjects from the same period wereenrolled, with 70 males and 50 females, aged (61.0±10.7) years. In addition, sixty pairs of tumor and adjacent tissue specimens from CRC patients undergoing surgical treatment were collected. The circRPS6 expression in serum exosome and tissue of CRC patients were detected via real-time fluorescence quantitative PCR (RT-qPCR), and its relationship with clinicopathological features and prognosis of CRC patients were also investigated. The levels of CEA and CA19-9 in serum were detected by electrochemiluminescence assay. The ROC curve and AUC were used to estimate the diagnostic capacity. Univariate and multivariate regression analysis was performed using Cox proportional hazard analysis. Results The expression level of circRPS6 in CRC tissue was significantly higher than that in adjacent tissue(Z=5.38, P<0.001). Compared with healthy control, the expression of serum exosomal circRPS6 was significantly upregulated in the CRC group(t=14.52,P<0.001). ROC curve analysis results showed that the AUC of exosomal circRPS6 was 0.882, which had a higher diagnostic efficacy in CRC patients than CEA and CA19-9 detection. There was a positive correlation between the expression level of exosomal circRPS6 with TNM stage and lymph node metastasis and distant metastasis(P<0.05). Kaplan-Meier survival analysis revealed that CRC patients with low exosomal circRPS6 levels had a much longer average survival time compared with those in high group. Moreover,multivariate analysis results indicated that exosomal circRPS6 was an independent prognostic factor in colorectal cancer. Conclusion Exosomal circRPS6 is highly expressed in the serum of CRC patients and correlated with malignant progression and poor prognosis, which is expected to be a potential marker for the diagnosis and prognosis evaluation of CRC patients.
Clinical application value of serum exosomal circRPS6 in the diagnosis and prognosis assessment of patients with colorectal cancer
Objective To investigate the expression and clinical application value of exosomal circRPS6 in serum of colorectal cancer (CRC) patients. Methods Peripheral serum samples were collected from 115 CRC patients admitted to Henan Provincial People′s Hospital from January 2019 to December 2020. There were 68 males and 47 females, aged (63.0±9.5) years. Meanwhile, one hundred and twenty healthy subjects from the same period wereenrolled, with 70 males and 50 females, aged (61.0±10.7) years. In addition, sixty pairs of tumor and adjacent tissue specimens from CRC patients undergoing surgical treatment were collected. The circRPS6 expression in serum exosome and tissue of CRC patients were detected via real-time fluorescence quantitative PCR (RT-qPCR), and its relationship with clinicopathological features and prognosis of CRC patients were also investigated. The levels of CEA and CA19-9 in serum were detected by electrochemiluminescence assay. The ROC curve and AUC were used to estimate the diagnostic capacity. Univariate and multivariate regression analysis was performed using Cox proportional hazard analysis. Results The expression level of circRPS6 in CRC tissue was significantly higher than that in adjacent tissue(Z=5.38, P<0.001). Compared with healthy control, the expression of serum exosomal circRPS6 was significantly upregulated in the CRC group(t=14.52,P<0.001). ROC curve analysis results showed that the AUC of exosomal circRPS6 was 0.882, which had a higher diagnostic efficacy in CRC patients than CEA and CA19-9 detection. There was a positive correlation between the expression level of exosomal circRPS6 with TNM stage and lymph node metastasis and distant metastasis(P<0.05). Kaplan-Meier survival analysis revealed that CRC patients with low exosomal circRPS6 levels had a much longer average survival time compared with those in high group. Moreover,multivariate analysis results indicated that exosomal circRPS6 was an independent prognostic factor in colorectal cancer. Conclusion Exosomal circRPS6 is highly expressed in the serum of CRC patients and correlated with malignant progression and poor prognosis, which is expected to be a potential marker for the diagnosis and prognosis evaluation of CRC patients.
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