RESUMEN
BACKGROUND: Inflammatory bowel diseases (IBD) are characterized by chronic relapsing inflammation of the gastrointestinal tract and encompass Crohn's disease and ulcerative colitis. IBD are often associated with extraintestinal manifestations affecting multiple organs including the liver. Increased levels of serum aminotransferases, possibly related to nonalcoholic fatty liver disease, constitute one of the most frequently described IBD-related liver diseases. The PNPLA3 I148M substitution is a major common genetic determinant of hepatic fat content and progression to chronic liver disease. The aim of this study was to investigate whether carriers of PNPLA3 148M allele with IBD have higher risk of liver steatosis and increase in transaminases levels. METHODS: The PNPLA3 I148M (rs738409) genotype was performed by Taqman assays in 158 individuals from Southern Italy (namely, Catanzaro cohort) and in 207 individuals from Northern Italy (namely, Milan cohort) with a definite diagnosis of IBD. Demographic and clinical data and also alanine transaminase levels were collected for both cohorts. The Catanzaro cohort underwent liver evaluation by sonography and liver stiffness and controlled attenuation parameter measurements by transient elastography. RESULTS: Here, we show for the first time that carriers of the PNPLA3 148M allele with IBD have a greater risk of hepatic steatosis (odds ratio, 2.9, and confidence interval, 1.1-7.8), higher controlled attenuation parameter values (P = 0.029), and increased circulating alanine transaminase (P = 0.035) in the Catanzaro cohort. We further confirm the higher alanine transaminase levels in the Milan cohort (P < 0.001). CONCLUSIONS: Our results show that PNPLA3 148M carriers with IBD have higher susceptibility to hepatic steatosis and liver damage.
Asunto(s)
Alanina Transaminasa/sangre , Predisposición Genética a la Enfermedad , Enfermedades Inflamatorias del Intestino/complicaciones , Lipasa/genética , Proteínas de la Membrana/genética , Enfermedad del Hígado Graso no Alcohólico/enzimología , Enfermedad del Hígado Graso no Alcohólico/etiología , Alelos , Aspartato Aminotransferasas/sangre , Biomarcadores/análisis , Estudios de Cohortes , Progresión de la Enfermedad , Femenino , Estudios de Seguimiento , Genotipo , Heterocigoto , Humanos , Enfermedades Inflamatorias del Intestino/genética , Italia , Masculino , Persona de Mediana Edad , Enfermedad del Hígado Graso no Alcohólico/sangre , Enfermedad del Hígado Graso no Alcohólico/patología , Reacción en Cadena de la Polimerasa , Pronóstico , Factores de RiesgoRESUMEN
BACKGROUND & AIMS: Iron accumulation within the arterial wall has been hypothesized to promote atherosclerosis progression. Aim of this study was to evaluate whether the hormone hepcidin and iron stores are associated with arterial stiffness in subjects with essential hypertension. METHODS: Circulating hepcidin, ferritin, and mutations in the hemochromatosis gene were compared between subjects included in the first vs. third tertile (n=284 each) of carotid-femoral pulse wave velocity (PWV) in an unselected cohort of patients with arterial hypertension. RESULTS: At univariate logistic regression analysis, high PWV was associated with higher ferritin levels (p=0.010), but lower hepcidin (p=0.045), and hepcidin ferritin/ratio (p<0.001). Hemochromatosis mutations predisposing to iron overload were associated with high PWV (p=0.025). At multivariate logistic regression analysis, high aortic stiffness was associated with older age, male sex, lower BMI, higher systolic blood pressure and heart rate, hyperferritinemia (OR 2.05, 95% c.i. 1.11-3.17 per log ng/ml; p=0.022), and lower circulating hepcidin concentration (OR 0.29, 95% c.i. 0.16-0.51 per log ng/ml; p<0.001). In subgroup analyses, high PWV was associated with indices of target organ damage, including micro-albuminuria (n=125, p=0.038), lower ejection fraction (n=175, p=0.031), cardiac diastolic dysfunction (p=0.004), and lower S wave peak systolic velocity (p<0.001). Ferritin was associated with cardiac diastolic dysfunction, independently of confounders (p=0.006). CONCLUSIONS: In conclusion, hyperferritinemia is associated with high aortic stiffness and cardiac diastolic dysfunction, while low circulating hepcidin with high aortic stiffness.
Asunto(s)
Ferritinas/sangre , Hepcidinas/sangre , Hipertensión/sangre , Hierro/sangre , Rigidez Vascular , Adulto , Anciano , Aorta/fisiopatología , Hipertensión Esencial , Femenino , Humanos , Hipertensión/fisiopatología , Masculino , Persona de Mediana Edad , Análisis de la Onda del PulsoRESUMEN
UNLABELLED: Steatosis and inherited host factors influence liver damage progression in chronic hepatitis C (CHC). The transmembrane 6 superfamily member 2 (TM6SF2) gene E167K variant increases liver fat and risk of progressive steatohepatitis by interfering with lipoprotein secretion. Our aim was to determine whether the E167K variant affects histological severity of steatosis, necroinflammation, and fibrosis in a cross-sectional cohort of 815 Italian therapy-naïve CHC patients. The association with clinically significant fibrosis was replicated in 645 Swiss/German patients. The TM6SF2 E167K variant was genotyped by TaqMan assays, steatosis graded according to the nonalcoholic fatty liver disease activity score, and necroinflammation and fibrosis graded and staged according to Ishak in Italian, and to Metavir in Swiss/German patients. The E167K variant was detected in 69 (9%) Italian patients and was associated with more severe steatosis, independently of confounders (P = 0.038). The association between E167K and steatosis severity was present in patients not infected by genotype 3 (G3) HCV (P = 0.031), but not in those infected by G3 HCV (P = 0.58). Furthermore, the E167K variant was associated with more severe necroinflammation (Ishak grade; adjusted P = 0.037) and nearly associated with more severe fibrosis (Ishak stage; adjusted P = 0.058). At multivariate logistic regression analysis, the E167K variant was independently associated with histologically probable or definite cirrhosis (Ishak stage S6; odds ratio [OR]: 2.19; 95% confidence interval [CI]: 1.18-3.93; P = 0.010). After further conditioning for steatosis and necroinflammation, the E167K variant remained associated with cirrhosis (OR, 3.15; 95% CI: 1.60-5.99; P < 0.001). In Swiss/German patients, the E167K variant was independently associated with clinically significant fibrosis Metavir stage F2-F4 (OR, 1.81; 95% CI: 1.12-3.02; P = 0.016). CONCLUSION: TM6SF2 E167K variant impacts on steatosis severity and is associated with liver damage and fibrosis in patients with CHC.
Asunto(s)
Hígado Graso/genética , Hepatitis C Crónica/complicaciones , Proteínas de la Membrana/genética , Anciano , Sustitución de Aminoácidos , Estudios Epidemiológicos , Femenino , Fibrosis , Hepatitis C Crónica/sangre , Hepatitis C Crónica/genética , Hepatitis C Crónica/patología , Humanos , Lípidos/sangre , Hígado/patología , Cirrosis Hepática/etiología , Masculino , Persona de Mediana Edad , Índice de Severidad de la EnfermedadRESUMEN
We report the case and discuss the outcome of a 63-year-old man, who was transplanted for hepatocellular carcinoma arising from cirrhosis associated with non-alcoholic fatty liver and diabetes. Because of co-existent well-compensated idiopathic familial pulmonary fibrosis and family history of cryptogenic cirrhosis, he was screened and found positive for a novel c.2062 C>G telomerase (TERT) mutation, encoding for the protein Glu668Asp variant, which was also confirmed in the neoplastic tissue. TERT mutations have very recently been associated with a spectrum of familial hepatic liver diseases often characterized by steatosis and hepatic iron overload, and have been reported to represent a frequent risk factor for cirrhosis, being observed in as much as 3-8% of unselected patients with different liver diseases. Due to the systemic involvement of telomerase diseases very likely influencing the clinical outcome, and the peculiar biological features of hepatocellular carcinoma arising in this context, we suggest that patients with cryptogenic cirrhosis or other suggestive features should be screened for TERT mutations and specific treatment algorithms elaborated for this disease.