Analysis of expression of genes involved in cholesterol homeostasis in liver biopsies from obese patients that underwent bariatric surgery (14 with NASH and 17 with hepatosteatosis) in comparison to control liver biopsies from cadaveric liver donors or resection of liver metastasis (n = 7) indicated that liver ABCG1 mRNA levels were modestly increased in patients with steatosis with or without NASH [137]. The gene discussed is ABCG1; the disease is metabolic dysfunction-associated steatohepatitis.