RESUMEN

AIMS/INTRODUCTION: The objective of the present study was to clarify the association of the type and number of first-degree family history of diabetes (FHD) with the clinical characteristics, especially with residual ß-cell function, in type 2 diabetes patients. MATERIALS AND METHODS: A total of 1,131 type 2 diabetes patients were recruited and divided into four groups according to FHD information as follows: (i) patients without FHD (FHD-); (ii) those with at least one sibling who had diabetes without parental diabetes (FHD+); (iii) those with one parent (FHD++); or (iv) those with both parents (FHD+++) who had diabetes with or without a sibling with diabetes. RESULTS: The percentages of the FHD-, FHD+, FHD++ and FHD+++ groups were 49.4%, 13.4%, 34.0% and 3.2%, respectively. Patients in the FHD++ and FHD+++ groups were significantly younger at the time of diabetes diagnosis (P < 0.001) than those in the FHD- and FHD+ groups, even after adjusting for confounding factors. In addition, the levels of insulin secretion were significantly lower in the patients in the FHD+, FHD++ and FHD+++ groups than those in the FHD- group (P < 0.05) after adjusting for confounding factors, and the patients in the FHD+++ group presented with the lowest levels of insulin secretion among the four groups. CONCLUSIONS: Our results showed that in type 2 diabetes patients, the degree of the associations between FHD and clinical characteristics differs according to the number and the type of FHD. In particular, FHD in both parents is most strongly associated with impaired residual ß-cell function.

Asunto(s)

Diabetes Mellitus Tipo 2/epidemiología , Células Secretoras de Insulina/patología , Anamnesis/estadística & datos numéricos , Anciano , Estudios de Cohortes , Complicaciones de la Diabetes/epidemiología , Complicaciones de la Diabetes/patología , Diabetes Mellitus Tipo 2/patología , Femenino , Humanos , Japón/epidemiología , Masculino , Persona de Mediana Edad , Padres , Factores de Riesgo

RESUMEN

AIM: Among the three adiponectin isoforms, a lower ratio of high molecular weight (HMW) adiponectin to total adiponectin (TA) is well known to cause insulin resistance and type 2 diabetes (T2D). However, how the levels of other adiponectin isoforms, such as the middle molecular weight (MMW) and low molecular weight (LMW) isoforms, and their relative ratio to TA change in T2D subjects has not been determined. Therefore, we investigated the association of these adiponectin-related parameters with T2D. METHODS: We examined the associations between adiponectin-related parameters and diabetes in a group of 394 T2D subjects and 374 controls (1st group) randomly selected from among the participants in our previous study. The associations between these parameters and the HOMA-IR in a 2nd group, consisting of the subjects remaining in the 1st group after the exclusion of subjects receiving diabetic medication, were also examined. RESULT: In the 1st group, after adjusting for confounding factor, the levels of all the adiponectin isoforms and the HMW/TA ratio were significantly lower among the diabetic subjects than among the controls (all P values < 0.01). On the contrary, the LMW/TA ratio was significantly higher among the diabetic subjects (P < 0.01) and was positively associated with T2D (odds ratio = 8.64, P < 0.01). In the 2nd group, the HMW/TA ratio was inversely associated with the HOMA-IR; however, the LMW/TA ratio was positively associated with the HOMA-IR (ß for LMW/TA ratio = 0.89, SE = 0.24, P < 0.001), similar to the association with T2D. The MMW/TA ratio was not associated with T2D or the HOMA-IR. CONCLUSION: The current investigation demonstrated that, unlike the reduction in the levels of all the adiponectin isoforms and the HMW/TA ratio, an increased LMW/TA ratio was associated with T2D through its relation to insulin resistance.

Asunto(s)

Adiponectina/sangre , Diabetes Mellitus Tipo 2/sangre , Resistencia a la Insulina , Adiponectina/análisis , Adiponectina/metabolismo , Anciano , Estudios de Cohortes , Diabetes Mellitus Tipo 2/metabolismo , Femenino , Humanos , Masculino , Persona de Mediana Edad , Peso Molecular

RESUMEN

AIM: Several studies have demonstrated that polymorphisms within the fat-mass and obesity-associated gene (FTO) are associated with type 2 diabetes (T2D). However, whether the effects of the FTO locus on T2D susceptibility are independent of fat-mass increases remains controversial. To investigate this issue, we examined the association of FTO variants with T2D and various aspects of BMI history during adult life in a Japanese population. METHODS: We genotyped SNPs within FTO (rs1121980 and rs1558902) in 760 Japanese patients with T2D who had reached a lifetime maximum BMI (BMImax) before or at the time of diagnosis and 693 control individuals with information regarding their BMImax. RESULTS: The BMImax showed the strongest association with T2D risk among the BMIs evaluated in this study. In the sex-combined analysis, FTO SNPs were not associated with any of the BMI variables or with T2D, but in sex-stratified analyses, both SNPs were significantly associated with the BMImax and rs1558902 was associated with T2D in men. The association of the SNPs with T2D remained significant after adjustments for the current BMI and age, whereas the T2D association of the SNP was no longer significant after adjustments for BMImax and age. CONCLUSIONS: These results suggest that the effects of FTO polymorphisms on T2D susceptibility in Japanese men are mediated through their effect on increasing the BMImax before or at the time of diagnosis.

Asunto(s)

Dioxigenasa FTO Dependiente de Alfa-Cetoglutarato/genética , Pueblo Asiatico/genética , Índice de Masa Corporal , Diabetes Mellitus Tipo 2/genética , Polimorfismo de Nucleótido Simple , Anciano , Femenino , Frecuencia de los Genes , Predisposición Genética a la Enfermedad/genética , Humanos , Japón , Masculino , Persona de Mediana Edad

RESUMEN

OBJECTIVE: We evaluated the clinical usefulness of a genetic risk score (GRS) based on 14 well-established variants for type 2 diabetes. RESEARCH DESIGN AND METHODS: We analyzed 14 SNPs at HHEX, CDKAL1, CDKN2B, SLC30A8, KCNJ11, IGF2BP2, PPARG, TCF7L2, FTO, KCNQ1, IRS-1, GCKR, UBE2E2, and C2CD4A/B in 1,487 Japanese individuals (724 patients with type 2 diabetes and 763 control subjects). A GRS was calculated according to the number of risk alleles by counting all 14 SNPs (T-GRS) as well as 11 SNPs related to ß-cell function (ß-GRS) and then assessing the association between each GRS and the clinical features. RESULTS: Among the 14 SNPs, 4 SNPs were significantly associated with type 2 diabetes in the present Japanese sample (P < 0.0036). The T-GRS was significantly associated with type 2 diabetes (P = 5.9 × 10(-21)). Among the subjects with type 2 diabetes, the ß-GRS was associated with individuals receiving insulin therapy (ß = 0.0131, SE = 0.006, P = 0.0431), age at diagnosis (ß = -0.608, SE = 0.204, P = 0.0029), fasting serum C-peptide level (ß = -0.032, SE = 0.0140, P = 0.022), and C-peptide index (ß = -0.031, SE = 0.012, P = 0.0125). CONCLUSIONS: Our data suggest that the ß-GRS is associated with reduced ß-cell functions and may be useful for selecting patients who should receive more aggressive ß-cell-preserving therapy.

Asunto(s)

Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/genética , Insulina/uso terapéutico , Proteínas Adaptadoras Transductoras de Señales/genética , Edad de Inicio , Anciano , Alelos , Dioxigenasa FTO Dependiente de Alfa-Cetoglutarato , Pueblo Asiatico , Proteínas de Transporte de Catión/genética , Quinasa 5 Dependiente de la Ciclina/genética , Inhibidor p15 de las Quinasas Dependientes de la Ciclina/genética , Femenino , Predisposición Genética a la Enfermedad/genética , Proteínas de Homeodominio/genética , Humanos , Proteínas Sustrato del Receptor de Insulina/genética , Canal de Potasio KCNQ1/genética , Masculino , Persona de Mediana Edad , PPAR gamma/genética , Polimorfismo de Nucleótido Simple/genética , Canales de Potasio de Rectificación Interna/genética , Proteínas/genética , Proteína 2 Similar al Factor de Transcripción 7/genética , Factores de Transcripción/genética , Enzimas Ubiquitina-Conjugadoras/genética , Transportador 8 de Zinc , ARNt Metiltransferasas

RESUMEN

We conducted a multicenter, randomized, controlled trial to investigate the effect of long-term oral supplementation with branched-chain amino acids (BCAA) on the event-free survival in 622 patients with decompensated cirrhosis. In the present study, the development of liver cancer was analyzed as an endpoint in particular. Subjects received either treatment with BCAA at 12g/day or dietary therapy containing the matched daily energy and protein intake. A Cox regression analysis was carried out to estimate the hazard ratios for different background factors stratified by treatment group. Liver cancer was noted in 89 patients. The risk for liver cancer was significantly higher for males, patients with concurrent diabetes mellitus, patients with an alpha-fetoprotein (AFP) level of 20ng/mL or higher, patients with higher body mass index (BMI), and patients with lower serum albumin levels. When the BCAA group and the diet group were compared for factors that interacted with the treatment arms, the risk for liver cancer was significantly reduced in the BCAA group with a BMI of 25 or higher and with an AFP level of 20ng/mL or higher. Oral supplemental treatment with BCAA may reduce the risk of liver cancer in cirrhotic patients with these specific factors.

RESUMEN

BACKGROUND & AIMS: Nutritional intervention with branched-chain amino acid (BCAA) is reported to increase serum albumin concentration in patients with decompensated cirrhosis. However, a definite conclusion on whether it can improve patients' survival has not yet been reached. The present study aimed to test possibilities of improving survival of patients with decompensated cirrhosis by using a BCAA preparation that is suitable for long-term oral administration. METHODS: A multicenter, randomized, and nutrient intake-controlled trial on the comparative effects of BCAA orally administered at 12 g/day for 2 years versus diet therapy with defined daily food intake (1.0-1.4 g protein kg(-1) day(-1) including BCAA preparation and 25-35 kcal kg(-1) day(-1)) was conducted in 646 patients with decompensated cirrhosis. The primary end point was a composite of death by any cause, development of liver cancer, rupture of esophageal varices, or progress of hepatic failure (event-free survival). The secondary end points were serum albumin concentration and health-related quality of life (QOL) measured by Short Form-36 questionnaire. RESULTS: The incidence of events comprising the primary end point significantly decreased in the BCAA group as compared with the diet group (hazard ratio, 0.67; 95% confidence interval, 0.49-0.93; P = .015; median observation period, 445 days). Serum albumin concentration increased significantly in the BCAA group as compared with the diet group (P = .018). The "general health perception" domain in Short Form-36 measures was also improved (P = .003). Patients' adherence to the prescription was favorable. CONCLUSIONS: Oral supplementation with a BCAA preparation that can be administered for a long period improves event-free survival, serum albumin concentration, and QOL in patients with decompensated cirrhosis with an adequate daily food intake.

Asunto(s)

Aminoácidos de Cadena Ramificada/administración & dosificación , Suplementos Dietéticos , Cirrosis Hepática/tratamiento farmacológico , Cirrosis Hepática/mortalidad , Administración Oral , Adulto , Anciano , Supervivencia sin Enfermedad , Esquema de Medicación , Femenino , Humanos , Japón , Cirrosis Hepática/complicaciones , Fallo Hepático/etiología , Fallo Hepático/prevención & control , Neoplasias Hepáticas/etiología , Neoplasias Hepáticas/prevención & control , Masculino , Persona de Mediana Edad

RESUMEN

BACKGROUND/AIMS: Human hepatoma cells have been reported to be resistant to Fas-mediated apoptosis. Sodium butyrate (SB) induced apoptosis of several cancer cells. We investigated the effects of SB on Fas-mediated apoptosis of hepatoma cells. METHODS: In hepatoma cells (HuH-6, HuH-7, Hep-G2, and PLC/PRF/5), susceptibility to Fas-mediated apoptosis and Fas expression were assessed. Caspase-3 activation and cell cycle progression were evaluated in HuH-6. A cDNA microarray assay was performed to screen the changes in the expression of mRNAs. RESULTS: Pretreatment with SB caused an enhancement of the sensitivity to anti-Fas-mediated cytotoxicity, though it did not increase the expression of Fas. The cDNA microarray assay revealed up-regulation of pro-apoptotic Bik, Bak, Bid and c-Jun N-terminal protein kinase-1, and down-regulation of anti-apoptotic Bag-1 and cellular Fas-associated death domain-like interleukin-1beta-converting enzyme inhibitor protein. In some molecules, expression of the proteins was confirmed by Western blotting. An increase in truncated-Bid accompanying the reduction in Bid was also observed. CONCLUSIONS: SB enhances the susceptibility of hepatoma cells to anti-Fas-mediated cytotoxicity by altering the mRNA and protein expression and/or the activation status of proteins that could be involved in the Fas signaling pathway. SB may have an important role in the elimination of hepatoma cells.

Asunto(s)

Apoptosis/efectos de los fármacos , Butiratos/farmacología , Carcinoma Hepatocelular , Neoplasias Hepáticas , Receptor fas/metabolismo , Apoptosis/fisiología , Línea Celular Tumoral/citología , Línea Celular Tumoral/efectos de los fármacos , Línea Celular Tumoral/fisiología , Citometría de Flujo , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Inhibidores de Histona Desacetilasas , Humanos , Análisis de Secuencia por Matrices de Oligonucleótidos

RESUMEN

BACKGROUND/AIMS: CD103, a mucosal integrin alphaEbeta7, binds to E-cadherin expressed on hepatocytes and bile duct epithelium in the liver. Although CD103+ T cells are enriched in intestinal intraepithelial lymphocytes, the localization of those cells in the liver is unknown. METHODS: We investigated whether CD103+ cells are present in human livers, and how they are associated with the intrahepatic development of T cells by flow cytometry and immunohistochemistry. RESULTS: Human livers contain significantly (P<0.001) higher percentages of CD103+ cells in CD4+ and CD8+ T cells (25.7+/-13.5 and 27.1+/-19.3%, respectively) than peripheral blood lymphocytes. Moreover, CD103+ cells in the liver, but not in peripheral blood, contained T cells with intermediate expression level of T cell receptor alphabeta. Those cells consist of mostly CD4+ and CD4-CD8- cells, and expressed low level of CD56 and interleukin-2 receptor beta chain in most of the population. These characteristics are distinct from natural killer T cells, which have been thought to be extrathymic T cells in human livers. Moreover, intrahepatic CD103+ cells expressed mRNA for recombination-activating gene-1, -2 and pre T cell receptor-alpha detected by reverse transcription-polymerase chain reaction. CONCLUSIONS: CD103+ T cells are preferentially accumulated in human livers, and those T cells show characteristics of extrathymic T cells.

Asunto(s)

Movimiento Celular/inmunología , Hepatitis Crónica/inmunología , Hígado/citología , Hígado/inmunología , Linfocitos T/citología , Timo/citología , Antígenos CD/metabolismo , Cadherinas/metabolismo , Proteínas de Unión al ADN/genética , Citometría de Flujo , Proteínas de Homeodominio/genética , Humanos , Inmunohistoquímica , Inmunofenotipificación , Cadenas alfa de Integrinas/metabolismo , Glicoproteínas de Membrana/genética , Proteínas Nucleares , ARN Mensajero/análisis , Receptores de Antígenos de Linfocitos T alfa-beta , Linfocitos T/inmunología , Linfocitos T/metabolismo , Timo/inmunología

Asunto(s)

Encefalopatía Hepática/etiología , Hepatitis Autoinmune/complicaciones , Fallo Hepático Agudo/etiología , Anciano , Femenino , Humanos

RESUMEN

BACKGROUND/AIMS: Idiosyncratic immune response to drugs causes two types of liver injury, cholestasis or hepatitis. However, the underlying immune mechanisms of drug-induced liver injury are presently unclear. METHODS: We examined the cytokine production of peripheral blood mononuclear cells (PBMCs) from 17 patients with drug-induced liver injury and healthy controls during their incubation with and without the drug by flow cytometry. We also analyzed the cytokine production in PBMCs from eight patients after stimulation with the drug-pulsed HepG2 lysates to examine the possibility that the drug or its metabolites conjugated with a putative molecule derived from HepG2 cells might be more immunogenic. RESULTS: Among several cytokines produced by the drug or the drug-pulsed HepG2 lysates, interferon-gamma production from CD8+ cells was associated with hepatocellular injury, and tumor necrosis factor-alpha production from CD14+ cells was with cholestasis. Especially, the latter was apparent when the drug-pulsed HepG2 lysates were used as stimulants, suggesting that a complex consist of the drug, or its metabolite, and a putative molecule derived from HepG2 cells might be more immunogenic than the drug itself. CONCLUSIONS: The analysis of intracytoplasmic cytokine in PBMCs after stimulation with the drug or the drug-pulsed HepG2 lysates is useful to analyze the immune mechanism underlying drug-induced liver injury.

Asunto(s)

Enfermedad Hepática Inducida por Sustancias y Drogas/inmunología , Citocinas/análisis , Citometría de Flujo/métodos , Leucocitos Mononucleares/química , Adulto , Anciano , Linfocitos T CD4-Positivos/química , Linfocitos T CD8-positivos/química , Carcinoma Hepatocelular , Línea Celular Tumoral , Enfermedad Hepática Inducida por Sustancias y Drogas/metabolismo , Citoplasma/química , Citoplasma/inmunología , Femenino , Humanos , Inmunohistoquímica , Técnicas In Vitro , Receptores de Lipopolisacáridos/análisis , Neoplasias Hepáticas , Masculino , Persona de Mediana Edad , Monocitos/química

RESUMEN

BACKGROUND/AIMS: Dendritic cells (DCs) are the most potent professional antigen-presenting cells. Although two subsets of circulating DCs, lineage(-)CD11c(+)CD4(low) (CD11c(+)DCs) and lineage (-)CD11c(-)CD4(+)CD123(+) (CD123(+)DCs) are identified in humans, the role of each DC subset in the immunopathogenesis of liver diseases is unknown. METHODS: We examined the numbers and activation status of each DC subset in the circulation and in the inflamed livers in patients with chronic liver diseases by flow cytometry and immunohistochemistry. RESULTS: The numbers of circulating CD11c(+)DCs were inversely correlated with serum alanine aminotransferase (ALT) levels in patients with chronic viral hepatitis, and that the expression of costimulatory molecules on circulating CD11c(+)DCs in patients with chronic viral hepatitis was significantly up-regulated in patients with high serum levels of ALT. Both DCs are also identified in the livers by flow cytometry, and the expression of costimulatory molecule CD40 on those DCs was significantly higher in liver DCs than that in circulating DCs. Moreover, the ratios of CD11c(+)DCs/CD123(+)DCs were higher in liver DCs (mean+/-SD, 7.2+/-6.0) than those of circulating DCs (4.0+/-4.6). Immunohistochemically, CD11c(+) or CD123(+) cells and CD83(+) activated DCs were observed mostly in portal areas with mononuclear cell infiltration in various liver diseases. These overall data suggest that DCs, especially CD11c(+)DCs, could be associated with the necroinflammatory response in the liver of chronic viral liver diseases. CONCLUSIONS: DCs, especially CD11c(+)DCs, may be involved in the immunopathogenesis of chronic liver diseases.

Asunto(s)

Células Dendríticas/citología , Hepatopatías/patología , Hígado/química , Hígado/citología , Adulto , Anciano , Alanina Transaminasa/sangre , Antígenos CD/análisis , Antígeno B7-2 , Antígeno CD11c/análisis , Antígenos CD40/análisis , Enfermedad Crónica , Células Dendríticas/química , Femenino , Citometría de Flujo , Antígenos HLA-DR/análisis , Humanos , Inmunoglobulinas/análisis , Inmunohistoquímica , Inmunofenotipificación , Subunidad alfa del Receptor de Interleucina-3 , Masculino , Glicoproteínas de Membrana/análisis , Persona de Mediana Edad , Receptores de Interleucina-3/análisis , Antígeno CD83

RESUMEN

Objective: Based on data from a national survey of primary biliary cirrhosis (PBC), the pathology and prognosis of PBC in Japan were clarified. In particular, we tried to perform multivariate analysis of factors useful in determining prognosis of asymptomatic PBC (a-PBC). Methods: The survey was performed 10 times. Responses from 3778 of 4361 registered patients (416 institutions) were investigated (survey period: January 1968-December 1998). At the time of diagnosis, patients were classified as a-PBC or symptomatic PBC (s1-PBC; pruritus only, s2-PBC; jaundice and serum bilirubin level above 2 mg/dl). The survival rate was obtained by the Kaplan-Meier method. Logistic regression analysis was used in multivariate analysis of prognostic factors of a-PBC. Results: There were no significant differences in clinical findings from those in previous reports. The 5-year survival rates of patients with a-PBC, s1-PBC, and s2-PBC at the time of diagnosis were 97, 88, and 53%, respectively. Patients with a-PBC at the time of diagnosis were divided into groups: those in whom the disease progressed to s2-PBC (8%) and did not progress to s2-PBC (92%) at the final examination, and the prognosis was compared between groups. The prognosis was significantly poorer in the s2-PBC progression group. As a result of multivariate analysis for prediction of prognosis, levels at diagnosis of total serum bilirubin (T-Bil), albumin (Alb), total cholesterol (T-Cho), histological stage, and presence or absence of ursodeoxycholic acid (UDCA) administration were selected as significant factors (P<0.00001). Conclusion: Serum T-Bil, Alb, T-Cho, and histological stage at the time of diagnosis and presence or absence of UDCA administration were considered useful early prognostic indicators in patients diagnosed as having a-PBC whose prognosis may deteriorate with progression to s2-PBC.