Correlations between PNPLA3 Gene Polymorphisms and NAFLD in Type 2 Diabetic Patients

Area of Science:

• Hepatology
• Genetics
• Cardiology

Background:

• Non-alcoholic fatty liver disease (NAFLD) is a global health concern, especially in type 2 diabetes mellitus (T2DM) patients.
• Identifying NAFLD risk factors is crucial for effective management.
• Patatin-like phospholipase domain-containing protein 3 (PNPLA3) is implicated in fatty liver but not insulin resistance.

Purpose of the Study:

• To investigate the association between PNPLA3 gene variants and fatty liver.
• To evaluate the relationship between PNPLA3, metabolic syndrome, and subclinical atherosclerosis in T2DM patients.
• To explore PNPLA3's role in cardiovascular risk within this population.

Main Methods:

• Study included T2DM patients without insulin treatment.
• Liver fat assessed by ultrasonography; subclinical atherosclerosis by carotid intima-media thickness (CIMT).
• PNPLA3 rs738409 genotyping performed using high-resolution melting analysis (CC, CG, GG genotypes).

Main Results:

• Over 90% of patients had hepatic steatosis; 62% showed elevated CIMT.
• The PNPLA3 GG genotype was more frequent in patients with moderate to severe hepatic steatosis.
• PNPLA3 genotypes were not associated with metabolic syndrome, subclinical atherosclerosis, or insulin resistance.

Conclusions:

• PNPLA3 rs738409 GG genotype is associated with increased hepatic steatosis in T2DM.
• PNPLA3 does not appear to independently influence cardiovascular risk in T2DM patients.
• Further research is needed to confirm any potential cardioprotective role of PNPLA3.