Abstract:
AIMS/HYPOTHESIS:The cholesterol absorption inhibitor ezetimibe has been shown to ameliorate non-alcoholic fatty liver disease (NAFLD) pathology in a single-armed clinical study and in experimental animal models. In this study, we investigated the efficacy of ezetimibe on NAFLD pathology in an open-label randomised controlled clinical trial. METHODS:We had planned to enrol 80 patients in the trial, as we had estimated that, with this sample size, the study would have 90% power. The study intervention and enrolment were discontinued because of the higher proportion of adverse events (significant elevation in HbA(1c)) in the ezetimibe group than in the control group. Thirty-two patients with NAFLD were enrolled and randomised (allocation by computer program). Ezetimibe (10 mg/day) was given to 17 patients with NAFLD for 6 months. The primary endpoint was change in serum aminotransferase level. Secondary outcomes were change in liver histology (12 control and 16 ezetimibe patients), insulin sensitivity including a hyperinsulinaemic-euglycaemic clamp study (ten control and 13 ezetimibe patients) and hepatic fatty acid composition (six control and nine ezetimibe patients). Hepatic gene expression profiling was completed in 15 patients using an Affymetrix gene chip. Patients and the physician in charge knew to which group the patient had been allocated, but people carrying out measurements or examinations were blinded to group. RESULTS:Serum total cholesterol was significantly decreased in the ezetimibe group. The fibrosis stage and ballooning score were also significantly improved with ezetimibe treatment. However, ezetimibe treatment significantly increased HbA1c and was associated with a significant increase in hepatic long-chain fatty acids. Hepatic gene expression analysis showed coordinate downregulation of genes involved in skeletal muscle development and cell adhesion molecules in the ezetimibe treatment group, suggesting a suppression of stellate cell development into myofibroblasts. Genes involved in the L-carnitine pathway were coordinately downregulated by ezetimibe treatment and those in the steroid metabolism pathway upregulated, suggestive of impaired oxidation of long-chain fatty acids. CONCLUSIONS/INTERPRETATION:Ezetimibe improved hepatic fibrosis but increased hepatic long-chain fatty acids and HbA1c in patients with NAFLD. These findings shed light on previously unrecognised actions of ezetimibe that should be examined further in future studies. TRIAL REGISTRATION:University Hospital Medical Information Network (UMIN) Clinical Trials Registry UMIN000005250. FUNDING:The study was funded by grants-in-aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and research grants from MSD.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Takeshita Y,Takamura T,Honda M,Kita Y,Zen Y,Kato K,Misu H,Ota T,Nakamura M,Yamada K,Sunagozaka H,Arai K,Yamashita T,Mizukoshi E,Kaneko Sdoi
10.1007/s00125-013-3149-9subject
Has Abstractpub_date
2014-05-01 00:00:00pages
878-90issue
5eissn
0012-186Xissn
1432-0428journal_volume
57pub_type
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