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Published in: Pathology & Oncology Research 4/2020

01-10-2020 | Gastric Cancer | Original Article

The Ratio of ssDNA to dsDNA in Circulating Cell-Free DNA Extract is a Stable Indicator for Diagnosis of Gastric Cancer

Authors: Xuewen Huang, Qi Zhao, Xianyuan An, Jie Pan, Lanjing Zhao, Lanfeng Shen, Yiqiu Xu, Dandan Yuan

Published in: Pathology & Oncology Research | Issue 4/2020

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Abstract

Due to the different mechanisms of cell-free DNA production, the single-stranded DNA to double-stranded DNA ratio in blood maybe different between healthy individuals and gastric cancer (GC) patients. We aimed to explore the potential application of this ratio in GC diagnosis. The plasma cell-free DNA extracts from 118 healthy individuals and 106 GC patients were prepared. The levels of single-stranded DNA or double-stranded DNA in plasma, and the single-stranded DNA to double-stranded DNA ratio on the diagnostic efficiency for GC were assessed with ROC curve. The relationships between this ratio and the clinical characteristics of GC patients were analyzed. The ratios in 63 GC patients before and after surgery were compared. In healthy individuals, the single-stranded DNA to double-stranded DNA ratio was not affected by factors including age, gender and BMI, and subjected to normal distribution (P = 0.1090). GC patients had a lower value of this ratio than healthy individuals (P < 0.0001). Considering this ratio as a GC diagnostic indicator, the area under ROC curve (AUC) was 0.923[95% confidence interval (CI):0.880–0.955]. This ratio in unresectable GC was obviously lower than that in resectable GC (P = 0.0045). There was a rank correlation between this ratio and GC TNM staging (rho = −0.266, P = 0.0058), but it had no correlation with tumor size (r = 0.14, P = 0.145). Additionally, this ratio was not affected by hemolysis and repeated freeze-thaw of blood samples, and was significantly elevated after surgery(P < 0.0001). The single-stranded DNA to double-stranded DNA ratio in plasma is a stable non-invasive indicator for GC diagnosis.
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Metadata
Title
The Ratio of ssDNA to dsDNA in Circulating Cell-Free DNA Extract is a Stable Indicator for Diagnosis of Gastric Cancer
Authors
Xuewen Huang
Qi Zhao
Xianyuan An
Jie Pan
Lanjing Zhao
Lanfeng Shen
Yiqiu Xu
Dandan Yuan
Publication date
01-10-2020
Publisher
Springer Netherlands
Published in
Pathology & Oncology Research / Issue 4/2020
Print ISSN: 1219-4956
Electronic ISSN: 1532-2807
DOI
https://doi.org/10.1007/s12253-020-00869-1

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