Microsomal triglyceride transfer protein (MTP) -493G/T gene polymorphism contributes to fat liver accumulation in HCV genotype 3 infected patients.
(A) A reduced activity of microsomal triglyceride transfer protein (MTP), a key enzyme of assembly/secretion of lipoproteins, is related to HCV steatosis. Host genetic background may influence development of steatosis. The aim of the study was to investigate the association between MTP-493 G/T gene polymorphism, fat liver accumulation and fibrosis progression in HCV infected patients. A total of 102 naïve patients with liver biopsy proven chronic hepatitis C were evaluated for MTP-493 G/T gene polymorphism, HCV RNA, HCV genotype, HOMA-IR, serum adiponectin, TNF-alpha and serum lipid levels. HCV genotype 3 infected patients carrying the T allele of the MTP gene polymorphism showed higher degree of steatosis than those carrying GG genotype (3.45 +/- 0.37 vs 1.30 +/- 0.45, respectively; P < 0.001). MTP'T' allele carriers also had higher HCV RNA serum levels (P < 0.01) and hepatic fibrosis (P < 0.001). Irrespective of MTP genotype, patients with HCV genotype 3 had lower levels of cholesterol, ApoB, HDL and LDL. In HCV genotype non-3 infected patients no parameters were associated with MTP gene polymorphism. In conclusion the presence of T allele of MTP-493G/T gene polymorphism predisposes patients infested with HCV genotype 3 to develop higher degree of fatty liver accumulation.
Zampino
R
R
Departments of Internal Medicine and Hepatology, F Cedrangolo, Second University of Naples, Naples, Italy.
Ingrosso
D
D
Durante-Mangoni
E
E
Capasso
R
R
Tripodi
M-F
MF
Restivo
L
L
Zappia
V
V
Ruggiero
G
G
Adinolfi
L E
LE
D000293:Adolescent; D000328:Adult; D000368:Aged; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D005234:Fatty Liver / Q000235:genetics* / Q000378:metabolism* / Q000503:physiopathology; D005260:Female; D005838:Genotype; D016174:Hepacivirus; D019698:Hepatitis C, Chronic / Q000235:genetics* / Q000378:metabolism / Q000503:physiopathology* / Q000821:virology; D006801:Humans; D008103:Liver Cirrhosis / Q000235:genetics / Q000378:metabolism / Q000503:physiopathology / Q000821:virology; D008297:Male; D008861:Microsomes; D008875:Middle Aged; D011110:Polymorphism, Genetic
D002352:Carrier Proteins; C106092:microsomal triglyceride transfer protein