ABSTRACT
BACKGROUND: Intrahepatic cholestasis of pregnancy is a multifactorial disorder of pregnancy associated with a genetic background. AIM: To evaluate the genetic contribution of ABCB4, MDR3 gene in the development of intrahepatic cholestasis of pregnancy in a large cohort of Italian subjects. METHODS: This study represents an extension of a previous multicentre-prospective study including three Italian referral centres. In all, we enrolled 96 women at the 3rd trimester of pregnancy. Genomic DNA was extracted from peripheral venous blood leucocytes by standard procedures. Polymerase chain reaction was used to amplify exon 14, 15 and 16 of MDR3 gene. RESULTS: We found 3 non-synonymous heterozygous mutations in exon 14 (E528D, R549H, G536A), 1 in exon 15 (R590Q) and 2 in exon 16 (R652G, T6671). MDR3 gene variants in exons 14, 15 and 16 occurred in 7/96 of pregnant mothers with intrahepatic cholestasis of pregnancy (7.2%), and in none of 96 pregnant controls matched for age and parity. All seven patients had normal gamma-glutamyl transpeptidase, normal bilirubin, but high levels of both alanine transferase and serum bile acids. One had cholesterol biliary lithiasis. The outcome of pregnancy was normal in four cases (with vaginal delivery), while there was one fetal distress. CONCLUSIONS: MDR3 mutations are responsible for the development of intrahepatic cholestasis of pregnancy in only a small percentage of Italian women. Further genetic studies are warranted, however, to clarify the role of different mutations in intrahepatic cholestasis of pregnancy.
Subject(s)
ATP Binding Cassette Transporter, Subfamily B/genetics , ATP-Binding Cassette Transporters/genetics , Cholestasis, Intrahepatic/genetics , DNA/genetics , Mutation , Polymorphism, Genetic , Pregnancy Complications , ATP Binding Cassette Transporter, Subfamily B/metabolism , ATP-Binding Cassette Transporters/metabolism , Adult , Cholestasis, Intrahepatic/epidemiology , Cholestasis, Intrahepatic/metabolism , Drug Resistance, Multiple , Exons , Female , Humans , Incidence , Italy/epidemiology , Middle Aged , Pregnancy , Pregnancy Trimester, Third , Prospective Studies , Risk FactorsABSTRACT
BACKGROUND: The C282Y mutation in the HFE gene is responsible for most cases of hereditary haemochromatosis. AIM: To investigate the allele frequency of HFE mutations and the associations between mutations and cases of iron overload or liver diseases in an open population of Central Italy. METHODS: A total of 502 individuals over 8 years of age, comprising 203 males and 299 females, who were residents in Arsita (a small town in Central Italy), were assayed for: C282Y, H63D and S65C mutations of the HFE gene by TaqMan probes; body mass index, serum ferritin, transferrin saturation, transaminases, GGT, glucose, insulin, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglycerides, HBV and HCV serum markers. Information was obtained on alcohol intake. Liver ultrasound was performed in 334 (67%) subjects. RESULTS: The allele frequencies for C282Y, H63D and S65C were 2%, 15%, and 0.01%, respectively. C282Y/wt was found in 19 subjects (4%), H63D/wt in 127 (25%), H63D/H63D in 11 (2%) and S65C/wt in one (2.0 per thousand). No homozygosity for C282Y or compound mutation (C282Y/H63D) was found in the study population, but 27 subjects (5%) had TfSat >45% (including 10 subjects with high serum ferritin). Overall, 49 subjects (9.8%) were HCV-RNA-positive. Logistic regression analysis indicated that male gender (P = 0.000) and hepatic steatosis (P = 0.017) were independent variables correlating to a high serum ferritin. CONCLUSION: C282Y HFE mutation is less frequent in Central Italy than in Northern Italy.
Subject(s)
Hemochromatosis/congenital , Histocompatibility Antigens Class I/genetics , Iron Overload/genetics , Membrane Proteins/genetics , Mutation/genetics , Adolescent , Adult , Aged , Aged, 80 and over , Child , Female , Gene Expression , Gene Frequency/genetics , Hemochromatosis/epidemiology , Hemochromatosis Protein , Humans , Italy/epidemiology , Liver Diseases/epidemiology , Liver Diseases/etiology , Male , Middle Aged , Population Surveillance , PrevalenceABSTRACT
BACKGROUND: Many reports of autoimmune hepatitis (AIH) were written in the 'pre-Hepatitis C era' and data on the natural history are still incomplete. AIM: To evaluate the clinical presentation and the natural history of type I AIH. METHODS: Seventy-three consecutive patients with a regular follow-up of at least 2 years were prospectively included in the study. The mean follow-up was 91 +/- 61 months. RESULTS: Patients with 'acute' onset at presentation were significantly older than patients with 'chronic' onset (P < 0.05) and had significantly higher serum levels of transaminase, gamma-glutamyltransferase and bilirubin; Prothrombin time was significantly lower in the said group compared with AIH patients with 'chronic' onset. In 4 of 63 (6.3%) female patients, AIH had the onset during pregnancy; in all of them the outcome of pregnancy was favourable. The major events during the follow-up included oesophageal varices (n = 9) and ascites (n = 4), and 60 patients remained in remission while receiving immunosuppression. None of the patients died during the follow-up, but seven patients were transplanted. The cumulative transplant-free probability of survival was 73.5% at 280 months. CONCLUSIONS: Elderly patients have more frequently an acute onset at presentation. Survival in AIH is apparently good; with early diagnosis, and improved medical therapy, liver transplantation for AIH will become a rare event in future.