Fatty Liver Disease and its Impaction on Insulin Resistance

Abstract

Abstract Background Non-alcoholic fatty liver disease (NAFLD) involves excess liver fat accumulation without specific causes like alcohol or viral infections, categorized into simple steatosis and nonalcoholic steatohepatitis (NASH). While simple steatosis is generally stable, NASH is linked to progressive liver disease. Diagnosis excludes secondary causes, and NAFLD, marked by hepatocyte changes, inflammation, and fibrosis, may lead to severe complications. Strongly associated with insulin resistance in liver and adipose tissues, NAFLD disrupts glucose-insulin interplay, compromising insulin's regulatory functions and contributing to metabolic disorders and disease progression. Aim of the Work The aim of the study is to investigate fatty liver disease and evaluate its impact of on insulin resistance. Patients and Methods This cross-sectional study, conducted at Ain Shams University, focuses on adults with NAFLD to assess insulin resistance. Inclusion criteria involve fatty liver disease, impaired glucose tolerance, and informed consent, while exclusions include alcohol intake and hepatitis. Data collection comprises demographics, anthropometrics, metabolic syndrome assessment, ultrasound grading of steatosis, and laboratory tests for liver function, FIB-4 index, and insulin resistance using HOMA-IR. The study aims to understand the relationship between NAFLD and insulin resistance in a clinical setting. Results In this study of 98 patients with Non-alcoholic Fatty Liver Disease (NAFLD), characterized by liver fat accumulation, insulin resistance (IR) was prevalent in 63.3%. The cases, predominantly females (52%), had mean age of 43 years, 50% were hypertensive, and 48% were diabetic. IR was directly related to age, and its prevalence was significantly higher in patients with diabetes and hypertension. IR correlated positively with body weight, BMI, ALT, AST, FIB-4, TG, and cholesterol. Fatty liver grading showed a significant association with IR, particularly in grade 2 cases. The optimal HOMA-IR cutoff for distinguishing between grade I and II fatty liver was >2.56, with high sensitivity (100%) and specificity (88.73%). These findings emphasize the intricate relationship between NAFLD, IR, and associated metabolic factors. Conclusion The study established a robust link between insulin resistance (IR) and Non- alcoholic Fatty Liver Disease (NAFLD), noting a 63.3% prevalence of IR in the subjects. Employing HOMA-IR, a cutoff point >2.56 effectively differentiated between NAFLD grades I and II, demonstrating 100% sensitivity, 88.73% specificity, and a remarkable AUC of 98. This underscores HOMA-IR's valuable role in identifying and stratifying NAFLD, especially in individuals with diabetes.