Hypobetalipoproteinemia and abetalipoproteinemia: liver disease and cardiovascular disease

Current Opinion in Lipidology - Tập 31 Số 2 - Trang 49-55 - 2020
Francine K. Welty1,2,3
1Division of Cardiology, Beth Israel–Deaconess Medical Center, Boston, Massachusetts, USA;
2e-mail: [email protected]
3to Francine K. Welty, MD, PhD, Division of Cardiology, Beth Israel Deaconess Medical Center, 330 Brookline Ave, SL 423, Boston, MA 02215, USA. Tel: +1 617 667 6010

Tóm tắt

Purpose of review Several mutations in the apolipoprotein (apo) B, proprotein convertase subtilisin kexin 9 (PCSK9) and microsomal triglyceride transfer protein genes result in low or absent levels of apoB and LDL cholesterol (LDL-C) in plasma which cause familial hypobetalipoproteinemia (FHBL) and abetalipoproteinemia (ABL). Mutations in the angiopoietin-like protein 3 ANGPTL3 gene cause familial combined hypolipidemia (FHBL2). Clinical manifestations range from none-to-severe, debilitating and life-threatening disorders. This review summarizes recent genetic, metabolic and clinical findings and management strategies. Recent findings Fatty liver, cirrhosis and hepatocellular carcinoma have been reported in FHBL and ABL probably due to decreased triglyceride export from the liver. Loss of function mutations in PCSK-9 and ANGPTL3 cause FHBL but not hepatic steatosis. In 12 case–control studies with 57 973 individuals, an apoB truncation was associated with a 72% reduction in coronary heart disease (odds ratio, 0.28; 95% confidence interval, 0.12–0.64; P = 0.002). PCSK9 inhibitors lowered risk of cardiovascular events in large, randomized trials without apparent adverse sequelae. Summary Mutations causing low LDL-C and apoB have provided insight into lipid metabolism, disease associations and the basis for drug development to lower LDL-C in disorders causing high levels of cholesterol. Early diagnosis and treatment is necessary to prevent adverse sequelae from FHBL and ABL.

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