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ISSN 1001-5256 (Print)
ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 41 Issue 2
Feb.  2025
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Article Contents

Characteristics of mitochondrial translational initiation factor 2 gene methylation and its association with the development of hepatocellular carcinoma

DOI: 10.12449/JCH250214
Research funding:

Natural Science Foundation of Sichuan Province (2022NSFSC1415);

Management Project of General Hospital of Western Theater Comm (2021-XZYG-C22)

More Information
  • Corresponding author: CHANG Kai, ck8148@126.com (ORCID: 0000-0001-6013-9256)
  • Received Date: 2024-07-18
  • Accepted Date: 2024-10-19
  • Published Date: 2025-02-25
  •   Objective  To investigate the characteristics of mitochondrial translational initiation factor 2 (MTIF2) gene methylation and its association with the development and progression of hepatocellular carcinoma (HCC).  Methods  MethSurv and EWAS Data Hub were used to perform the standardized analysis and the cluster analysis of MTIF2 methylation samples, including survival curve analysis, methylation signature analysis, the association of tumor signaling pathways, and a comparative analysis based on pan-cancer database. The independent-samples t test was used for comparison between two groups; a one-way analysis of variance was used for comparison between multiple groups, and the least significant difference t-test was used for further comparison between two groups. The Cox proportional hazards model was used to perform the univariate and multivariate survival analyses of methylation level at the CpG site. The Kaplan-Meier method was used to investigate the survival differences between the patients with low methylation level and those with high methylation level, and the Log-likelihood ratio method was used for survival difference analysis.  Results  Global clustering of MTIF2 methylation showed that there was no significant difference in MTIF2 gene methylation level between different races, ethnicities, BMI levels, and ages. The Kaplan-Meier survival curve analysis showed that the patients with N-Shore hypermethylation of the MTIF2 gene had a significantly better prognosis than those with hypomethylation (hazard ratio [HR]=0.492, P<0.001), while there was no significant difference in survival rate between the patients with different CpG island and S-Shore methylation levels (P>0.05). The methylation profile of the MTIF2 gene based on different ages, sexes, BMI levels, races, ethnicities, and clinical stages showed that the N-Shore and CpG island methylation levels of the MTIF2 gene decreased with the increase in age, and the Caucasian population had significantly lower N-Shore methylation levels of the MTIF2 gene than the Asian population (P<0.05); the patients with clinical stage Ⅳ had significantly lower N-Shore and CpG island methylation levels of the MTIF2 gene than those with stage Ⅰ/Ⅱ (P<0.05). Clinical validation showed that the patients with stage Ⅲ/Ⅳ HCC had a significantly lower methylation level of the MTIF2 gene than those with stage Ⅰ/Ⅱ HCC and the normal population (P<0.05).  Conclusion  N-Shore hypomethylation of the MTIF2 gene is a risk factor for the development and progression of HCC.

     

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