Urinary exosomal RAB11A serves as a novel non-invasive biomarker for diagnosis, treatment response monitoring, and prognosis in small cell lung cancer.

IF 3.3 3区 医学 Q2 BIOCHEMICAL RESEARCH METHODS
Weiwei Wang, Na Liu, Shanshan Wang, Chunkai Yu, Lei Pan, Man Zhang
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Abstract

Background: Small cell lung cancer (SCLC) is an aggressive malignancy with a poor prognosis. This study aimed to analyze the urinary exosomal proteome of SCLC patients to identify and validate potential non-invasive biomarkers for improving diagnosis, treatment response monitoring, and prognosis prediction.

Methods: We analyzed 90 urine samples from SCLC patients, divided into training (n = 38) and validation (n = 52) sets, including untreated, partial/complete remission, and relapsed groups. Ten healthy controls were included. Urinary exosomes were isolated by ultracentrifugation. The proteomic analysis employed data-independent acquisition mass spectrometry (DIA-MS) and parallel reaction monitoring (PRM). Immunohistochemistry was performed on 30 pairs of SCLC and adjacent normal tissues.

Results: Proteomic analysis revealed distinct exosomal protein expression patterns across SCLC stages. RAB11A emerged as a key differentially expressed protein. PRM validation confirmed significant changes in RAB11A levels across disease stages. ROC curve analysis demonstrated excellent diagnostic performance of RAB11A in distinguishing SCLC patients from healthy controls (AUC = 0.91, 95% CI 0.79-1.00, P = 0.0004), with a sensitivity of 85% and specificity of 92%. RAB11A also showed significant potential in monitoring treatment response (AUC = 0.86, 95% CI 0.69-1.00, P = 0.0019) and disease relapse (AUC = 0.90, 95% CI 0.76-1.00, P = 0.0005). Immunohistochemistry showed significantly higher RAB11A expression in SCLC tissues compared to adjacent normal tissues (70% vs. 33% positive expression, P = 0.043).

Conclusion: Urinary exosomal RAB11A shows promise as a non-invasive biomarker for SCLC diagnosis, treatment response monitoring, and early detection of relapse, potentially improving clinical management of SCLC patients. The findings provide insights into SCLC pathogenesis and offer a non-invasive approach for patient monitoring, which could improve clinical management strategies.

尿外泌体RAB11A作为一种新的无创生物标志物,可用于小细胞肺癌的诊断、治疗反应监测和预后。
背景:小细胞肺癌(SCLC)是一种预后不良的侵袭性恶性肿瘤。本研究旨在分析SCLC患者的尿外泌体蛋白质组,以识别和验证潜在的非侵入性生物标志物,以改善诊断、治疗反应监测和预后预测。方法:我们分析了来自SCLC患者的90份尿液样本,分为训练组(n = 38)和验证组(n = 52),包括未治疗组、部分/完全缓解组和复发组。纳入10名健康对照。用超离心分离尿外泌体。蛋白质组学分析采用数据独立获取质谱(DIA-MS)和平行反应监测(PRM)。对30对SCLC及邻近正常组织进行免疫组化。结果:蛋白质组学分析揭示了不同SCLC分期的外泌体蛋白表达模式。RAB11A是一个关键的差异表达蛋白。PRM验证证实了RAB11A水平在不同疾病阶段的显著变化。ROC曲线分析显示RAB11A在区分SCLC患者和健康对照组方面具有良好的诊断性能(AUC = 0.91, 95% CI 0.79-1.00, P = 0.0004),敏感性为85%,特异性为92%。RAB11A在监测治疗反应(AUC = 0.86, 95% CI 0.69-1.00, P = 0.0019)和疾病复发(AUC = 0.90, 95% CI 0.76-1.00, P = 0.0005)方面也显示出显著的潜力。免疫组化显示RAB11A在SCLC组织中的表达明显高于邻近正常组织(70%比33%阳性表达,P = 0.043)。结论:尿外泌体RAB11A有望作为SCLC诊断、治疗反应监测和早期复发的无创生物标志物,有可能改善SCLC患者的临床管理。这些发现为SCLC的发病机制提供了新的见解,并为患者监测提供了无创方法,可以改善临床管理策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Clinical proteomics
Clinical proteomics BIOCHEMICAL RESEARCH METHODS-
CiteScore
5.80
自引率
2.60%
发文量
37
审稿时长
17 weeks
期刊介绍: Clinical Proteomics encompasses all aspects of translational proteomics. Special emphasis will be placed on the application of proteomic technology to all aspects of clinical research and molecular medicine. The journal is committed to rapid scientific review and timely publication of submitted manuscripts.
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