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Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer

  • Authors:
    • Xueyun Huo
    • Xiaoqin Xiao
    • Shuangyue Zhang
    • Xiaoyan Du
    • Changlong Li
    • Zhigang Bai
    • Zhenwen Chen
  • View Affiliations / Copyright

    Affiliations: School of Basic Medical Sciences, Capital Medical University, Beijing 100069, P.R. China, Tumor Model Laboratory, Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing 100069, P.R. China
    Copyright: © Huo et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 430
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    Published online on: March 30, 2021
       https://doi.org/10.3892/ol.2021.12691
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Abstract

Microsatellite instability (MSI) detection is widely used in the diagnosis and prognosis evaluation of colorectal cancer. However, for gastric cancer (GC), there is no standard panel of microsatellites (MSs) used in clinical guidance. The present study aimed to identify useful predictors of the clinical features and for the prognosis of GC, based on an investigation of MSI and loss of heterozygosity (LOH) in tumor‑related genes. First, from 20 tumor‑related genes which were proven to be important to the development of GC, 91 MSs were identified, and PCR amplification, short tandem repeat scanning analysis and TA clone sequencing were used to analyze MSI and LOH in the first set of 90 GC samples. Subsequently, the same method was used to detect the MSI/LOH of the optimized loci in the second set of 136 GC samples. MSI/LOH in the mismatch repair genes was highly consistent with that in oncogenes and tumor suppressor genes, respectively. The length of the core sequence was a main factor for the MSI/LOH rate. The MSI of 12 single loci was significantly associated with lymph node metastasis. The MSI in TP53‑1 and the LOH in MGMT‑10 were significantly associated with early stages of tumor infiltration depth. The LOH in MGMT‑10, PTN‑2 and MCC‑17 was significantly associated with TNM stage. The LOH in TP53‑1 and ERBB2‑12 was associated with adenocarcinoma. The MSI/LOH in 6 single loci of 5 tumor‑related genes was associated with poor prognosis of GC. The present study demonstrated that the MSI/LOH of loci in tumor‑associated genes was associated with 4 clinicopathological characteristics and outcomes of GC. These results may provide potential specific biomarkers for the clinical prediction and treatment of GC.
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Copy and paste a formatted citation
Spandidos Publications style
Huo X, Xiao X, Zhang S, Du X, Li C, Bai Z and Chen Z: Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer. Oncol Lett 21: 430, 2021.
APA
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., & Chen, Z. (2021). Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer. Oncology Letters, 21, 430. https://doi.org/10.3892/ol.2021.12691
MLA
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., Chen, Z."Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer". Oncology Letters 21.6 (2021): 430.
Chicago
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., Chen, Z."Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer". Oncology Letters 21, no. 6 (2021): 430. https://doi.org/10.3892/ol.2021.12691
Copy and paste a formatted citation
x
Spandidos Publications style
Huo X, Xiao X, Zhang S, Du X, Li C, Bai Z and Chen Z: Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer. Oncol Lett 21: 430, 2021.
APA
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., & Chen, Z. (2021). Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer. Oncology Letters, 21, 430. https://doi.org/10.3892/ol.2021.12691
MLA
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., Chen, Z."Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer". Oncology Letters 21.6 (2021): 430.
Chicago
Huo, X., Xiao, X., Zhang, S., Du, X., Li, C., Bai, Z., Chen, Z."Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity in tumor‑related genes in gastric cancer". Oncology Letters 21, no. 6 (2021): 430. https://doi.org/10.3892/ol.2021.12691
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