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Updated: Jun 13, 2026

In Vitro Modeling of Fat Deposition in Metabolic Dysfunction-Associated Steatotic Liver Disease
Published on: July 19, 2024
Single-Nucleotide Polymorphisms in Genes Associated with Mitochondrial and DNA Damage Response Modulate the Risk of
Sylwia Ziółkowska1, Marcin Kosmalski2, Łukasz Kołodziej3,4
1Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland.
None:
Non-alcoholic fatty liver disease (NAFLD) is one of the most common chronic liver disorders and has been linked to oxidative stress. Therefore, it can be hypothesized that NAFLD may be associated with genes encoding proteins involved in the base-excision repair (BER) pathway. Moreover, mitochondrial dysfunction plays a significant role in the development of NAFLD. In light of these observations, we suggested that fatty liver may be associated with genes that encode proteins responsible for mitochondrial DNA (mtDNA) degradation. This study evaluates single-nucleotide polymorphisms (SNPs) within the EXOG, ENDOG, POLG, FEN1, PARP1, and XRCC1 genes in 99 patients and 104 controls. SNP genotyping was performed using TaqMan probes and the findings were presented as odds ratios with corresponding 95% confidence intervals. Each of the eight investigated SNPs was found to modulate the risk of NAFLD occurrence. The analysis revealed that the studied haplotypes of EXOG and XRCC1 significantly affected the frequency of NAFLD in patients. The findings allow us to assume that there is a link between FEN1, PARP1, XRCC1, POLG, EXOG, and ENDOG and liver steatosis. We believe that the impaired repair and degradation of damaged mtDNA may have a significant impact on the development of NAFLD.
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