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A PDCD1 Role in the Genetic Predisposition to NAFLD-HCC?
Nardeen Eldafashi1,2, Rebecca Darlay3, Ruchi Shukla4
1Translational and Clinical Research Institute, Faculty of Medical Sciences, The Medical School, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.
Cancers
|April 3, 2021
Summary
Genetic variations in immune response genes, specifically PDCD1, are linked to the development of liver cancer (HCC) in patients with non-alcoholic fatty liver disease (NAFLD). These findings suggest a role for immune regulation in NAFLD-HCC pathogenesis.
Area of Science:
- Genetics
- Immunology
- Hepatology
Background:
- Obesity and non-alcoholic fatty liver disease (NAFLD) are increasing global mortality from hepatocellular carcinoma (HCC).
- While hepatic steatosis, steatohepatitis, and fibrosis are key factors, altered immune responses are implicated in NAFLD-HCC pathogenesis.
- Previous genetic studies identified variants in fat-deposition genes (PNPLA3, TM6SF2) associated with liver disease progression.
Purpose of the Study:
- To investigate the association between single-nucleotide polymorphisms (SNPs) in candidate immunoregulatory genes and the development of NAFLD-HCC.
- To explore the roles of specific SNPs in immune tolerance induction in NAFLD patients.
Main Methods:
- Genotyping of SNPs in immunoregulatory genes (MICA, CD44, PDCD1) in 594 NAFLD patients and 391 NAFLD-HCC patients.
- Analysis of associations between these SNPs and clinical factors (age, BMI, diabetes, cirrhosis) with HCC development.
- Statistical analysis to determine independent associations with NAFLD-HCC risk.
Main Results:
- PNPLA3 and TM6SF2 SNPs were associated with cirrhosis progression and NAFLD-HCC development.
- PDCD1 SNPs were specifically linked to NAFLD-HCC risk, independent of cirrhosis.
- PDCD1 rs7421861 showed independent association, while rs10204525 was significant after adjusting for other risks, particularly in women.
Conclusions:
- Genetic variations in PDCD1 play a significant role in NAFLD-HCC development, irrespective of cirrhosis.
- Inter-individual differences in immune tolerance induction may impact NAFLD-HCC risk.
- These findings contribute to understanding the complex pathogenesis of NAFLD-associated liver cancer.
Keywords:
PD-1PDCD1PNPLA3TM6SF2genetic predispositionhepatocellular carcinomametabolic syndromeprimary liver cancersingle-nucleotide polymorphismMore Related Videos
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