Use of Circulating Exosomal lncRNA-GC1 as Blood Biomarker for Early Detection and Monitoring Gastric Cancer
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 700
- 试验地点
- 1
- 主要终点
- Detection of levels of circulating exosomal lncRNA-GC1
研究概览
简要总结
Background:
Although its incidence and mortality has decreased, gastric cancer (GC) is the fourth most common cancer and the second leading cause of cancer-related death worldwide, particularly in China. The number of new cases and deaths may comprise approximately one-half of the global total. The high mortality of GC is partially attributed to late detection and nonspecific symptoms. The current gold standard for diagnosing GC is endoscopic biopsy. However, because of its discomfort to the patient and high cost, screening for early GC (EGC) is a major difficulty in clinical practice, particularly for asymptomatic individuals. Unfortunately, gastric precursor lesions such as intestinal metaplasia (IM), chronic atrophic gastritis (CAG), and persistent Helicobacter pylori (HP) infection increase the difficulty of screening for EGC. Furthermore, the standard serum biomarkers for GC, such as CEA, CA72-4, and CA19-9 achieve a low positive rate. Thus, it is critically important to develop new approaches for diagnosing EGC with high specificity and sensitivity.
Objective:
To study circulating exosomal lncRNA-GC1 as a potential biomarker for detection of gastric cancer.
Eligibility:
Participants from two medical centers in China
Design:
Investigators will use blood samples from participants in the two medical centers. Investigators will use samples from some who developed gastric cancer. The other samples will be from some who stayed cancer free in that time.
Participants already gave written informed consent.
Investigators will take exosomes from the samples and look for lncRNA-GC1.
详细描述
Late detection is a major reason for the poor prognosis of patients with gastric cancer. For example, the proportion of patients diagnosed with early gastric cancer is as low as 9% in China. The survival rate of patients with early gastric cancer ranges from 60%-80% compared with 15%-24% of patients with advanced gastric cancer. It is therefore imperative to develop novel, relatively noninvasive approaches to improve early diagnosis of gastric cancer. Endoscopy has been considered as the gold standard for diagnosis of gastric cancer but endoscopy-based mass screening may not be feasible in relatively low-risk or less developed regions. Therefore, identification of biomarkers for early stage disease is crucial to in the development of effective screening strategies. With the recent advances in cancer genetics and assay technologies, this is an opportune time to discover minimally invasive, specific, and cost-effective biomarkers. The investigators' previous study has identified circulating exosomal lncRNA-GC1 as a potential biomarker for gastric cancer. The investigators then conducted this prospective study to further investigate the predictive value of circulating exosomal lncRNA-GC1 for early-detection and monitoring progression of gastric cancer.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Having signed informed consent
- •Age≥ 18 years old
- •Histologically confirmed gastric adenocarcinoma
排除标准
- •Other previous malignancy within 5 year
- •Surgery (excluding diagnostic biopsy) within 4 weeks prior to study
- •Pregnancy or lactation period
- •Legal incapacity
结局指标
主要结局
Detection of levels of circulating exosomal lncRNA-GC1
时间窗: Through study completion, an average of 1 year
Levels of circulating exosomal lncRNA-GC1 are detected by RT-PCR
次要结局
未报告次要终点
研究者
Lin Chen
Vice Director of Department of General Surgery, Chinese PLA General Hospital
Chinese PLA General Hospital