ALD: alcoholic liver disease; ALP: alkaline phosphatase; ALT: alanine aminotransferase; AST: aspartate aminotransferase; BMI: body mass index; BUN: blood urea nitrogen; γ-GTP: gamma-glutamyl transpeptidase; HCC: hepatocellular carcinoma; MELD Na: Model for End-Stage Liver Disease Sodium; NAFLD: non-alcoholic fatty liver disease; NH3: ammonia. The gene discussed is GGTLC1; the disease is alcoholic liver diseases.