Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 48
Filtrar
1.
Ultrasound Med Biol ; 48(7): 1282-1289, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35397929

RESUMO

This retrospective study was aimed (i) at elucidating the correlation between fatty liver diagnoses based on the plain computed tomography (CT) value and those based on the attenuation coefficient (AC) value determined with the ultrasound-guided attenuation parameter (UGAP) and (ii) at evaluating the diagnostic power of AC values. We included 125 patients who underwent blood tests, abdominal ultrasonography and abdominal CT at our department between April 2020 and March 2021. Hepatic fat infiltration was categorized as S0 (<5%), S1 (≥5 and 30<%), S2 (≥30 and <50%) or S3 (≥50%). The diagnostic ability of UGAP-determined AC was evaluated using receiver operating characteristic (ROC) curve analysis, and the correlation between AC value and fatty liver grade by CT value. The coefficient of correlation (r) between the AC value and plain CT value was -0.6188, indicating a moderate relationship. For diagnosing grade ≥S1 (n = 44), the area under the ROC curve (AUROC) was 0.8541, sensitivity 84.1%, specificity 81.5% and cutoff value 0.676 dB/cm/MHz. In diagnosing grade ≥S2 (n = 35), the AUROC was 0.8603, sensitivity 88.6%, specificity 81.1% and cutoff value 0.694 dB/cm/MHz. In diagnosing grade = S3 (n = 18), the AUROC was 0.9016, sensitivity 94.5%, specificity 81.9% and cutoff value, 0.704 dB/cm/MHz. The AC value is useful in diagnosing fatty liver.


Assuntos
Técnicas de Imagem por Elasticidade , Fígado Gorduroso , Hepatopatia Gordurosa não Alcoólica , Biópsia , Técnicas de Imagem por Elasticidade/métodos , Fígado Gorduroso/diagnóstico por imagem , Humanos , Fígado/diagnóstico por imagem , Curva ROC , Estudos Retrospectivos , Tomografia Computadorizada por Raios X , Ultrassonografia de Intervenção
2.
Intern Med ; 61(4): 461-467, 2022 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-34433710

RESUMO

Objective Hepatitis C virus (HCV) eradication is associated with decreased serum ferritin and increased serum low-density lipoprotein-cholesterol (LDL-C) levels, although the mechanisms underlying these changes remain unclear. This study aimed to identify the mechanisms underlying the changes in iron and lipid metabolism after HCV eradication. Methods We retrospectively investigated iron and lipid metabolism changes in 22 patients with chronic hepatitis or compensated liver cirrhosis with HCV genotype 1b infection after HCV eradication. We measured the serum erythroferrone (ERFE) levels to assess the association with these metabolic changes. Patients were administered ledipasvir 90 mg and sofosbuvir 400 mg once daily for 12 weeks and were observed for 12 more weeks to evaluate the sustained virological response. Results Half of the patients were men. At baseline, the serum ferritin and ERFE levels were elevated, while the serum LDL-C levels were within the normal range. All patients achieved a sustained virological response at 24 weeks; furthermore, the serum ferritin and ERFE levels were significantly decreased, and the serum LDL-C levels were significantly increased at 24 weeks from baseline (p<0.001, all). In men, a decrease in serum ERFE levels was correlated with changes in the serum ferritin and LDL-C levels (r=0.78, p<0.01; r=-0.76, p<0.01, respectively). In addition, a decrease in the serum ferritin levels was correlated with an increase in the serum LDL-C levels (r=-0.89, p<0.001). These correlations were not observed in women. Conclusion Our results suggest a possible association between iron and lipid metabolism changes and the involvement of ERFE after HCV eradication in men as well as potential sex-related differences.


Assuntos
Hepatite C Crônica , Hepatite C , Antivirais/uso terapêutico , Feminino , Genótipo , Hepacivirus/genética , Hepatite C/complicações , Hepatite C/tratamento farmacológico , Hepatite C Crônica/complicações , Humanos , Ferro , Metabolismo dos Lipídeos , Masculino , Estudos Retrospectivos
3.
Clin J Gastroenterol ; 14(3): 836-841, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33751419

RESUMO

We present the case of a 56-year-old woman diagnosed with primary biliary cholangitis (PBC). She has continuously taken 600 mg/day of ursodeoxycholic acid. Edema of the lower limbs manifested on July 20, 20XX; after 2 weeks, she manifested rapid weight gain and nettle rash on the limbs and trunk. She was admitted to our hospital on August 22. She had marked eosinophilia, hypoalbuminemia, anemia, non-pitting lower limbs edema, and nettle rash of the limbs and the trunk. We ruled out other diseases that may have caused the edema and suspected her with episodic angioedema with eosinophilia (EAE). The peripheral blood eosinophil count rapidly decreased after the administration of 30 mg prednisolone. The edema and nettle rash improved on the 7th day of admission, and the hypoalbuminemia and anemia improved on the 14th day. Prednisolone was tapered and discontinued, and there was no relapse of edema. We revised our diagnosis to non-recurrent EAE. She was diagnosed with asymptomatic PBC; therefore, anemia and hypoalbuminemia were considered not PBC but chronic inflammation and decrease in appetite. In this case, elevation of serum IgG4 was observed at onset and at remission. This suggests that IgG4 may be involved in the development of EAE in patients with chronic liver disease.


Assuntos
Angioedema , Eosinofilia , Cirrose Hepática Biliar , Eosinofilia/complicações , Feminino , Humanos , Imunoglobulina G , Cirrose Hepática Biliar/complicações , Cirrose Hepática Biliar/diagnóstico , Cirrose Hepática Biliar/tratamento farmacológico , Pessoa de Meia-Idade , Ácido Ursodesoxicólico
4.
J Gastroenterol Hepatol ; 36(5): 1208-1215, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-32926748

RESUMO

BACKGROUND AND AIM: Portal hypertensive gastropathy (PHG) is characterized by noninflammatory edema and vasodilatation of the lamina propria of the mucosal epithelium. In addition, the alterations of intercellular junction proteins and dilatation of the endothelial gaps have been reported. In this study, we examined whether irsogladine maleate (IM), a gastric mucosal protective agent, has the potential to improve PHG by restoration of tight junctions (TJs). METHODS: Twenty-four patients with PHG were registered and randomly assigned into two groups: 12 patients in the IM-administration group and 12 patients in the non-administration group. In the administration group, IM (4 mg/day) was administered orally for 12 weeks. Gastric mucosa with a red color in patients with PHG were obtained endoscopically on the registration day and 12 weeks later. The endoscopic findings were evaluated, an immunohistochemical analysis of claudin-3 (a TJ protein) expression in gastric mucosal tissues by a laser microscope was performed, and claudin-3 expression was quantified by western blot analysis. RESULTS: Irsogladine maleate improved the degree of PHG in 2/12 patients endoscopically, in contrast to none of the 12 patients in the non-administration group. Immunohistochemical analysis showed that expression of claudin-3 increased in 8/12 patients in the IM-administration group and 2/12 patients in the non-administration group (P = 0.036). Western blot analysis revealed that the increase in claudin-3 after 12 weeks was significantly higher in the IM-administration group than in the non-administration group (P = 0.010). CONCLUSIONS: The present pilot study suggested that IM might improve the gastric mucosa in PHG through restoration of TJ-protein claudin-3.


Assuntos
Claudina-3/genética , Claudina-3/metabolismo , Edema/tratamento farmacológico , Edema/etiologia , Mucosa Gástrica/metabolismo , Expressão Gênica/efeitos dos fármacos , Hipertensão Portal/complicações , Gastropatias/tratamento farmacológico , Gastropatias/etiologia , Proteínas de Junções Íntimas/genética , Proteínas de Junções Íntimas/metabolismo , Triazinas/administração & dosagem , Triazinas/farmacologia , Adulto , Idoso , Western Blotting/métodos , Edema/genética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Gastropatias/genética
5.
Intern Med ; 59(9): 1163-1166, 2020 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-31956202

RESUMO

An 88-year-old man was admitted for elevated liver enzyme levels. Nine years earlier, the patient had been diagnosed with diffuse large B-cell lymphoma (DLBCL) and undergone rituximab, cyclophosphamide, doxorubicin hydrochloride, oncovin, prednisone (R-CHOP) therapy. This patient previously had had a hepatitis B virus (HBV) infection before chemotherapy. After the chemotherapy, he was administered an luteinizing hormone-releasing hormone (LHRH) agonist for prostate cancer. We diagnosed him with HBV reactivation because of positive serum HBV-DNA. HBV reactivation can occur a long time after chemotherapy, particularly if another treatment with immunity-altering drugs is added. In such cases, additional surveillance may be required to detect HBV reactivation.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Vírus da Hepatite B/fisiologia , Hepatite B/diagnóstico , Leuprolida/efeitos adversos , Linfoma Difuso de Grandes Células B/tratamento farmacológico , Idoso de 80 Anos ou mais , Ciclofosfamida/efeitos adversos , Diagnóstico Diferencial , Doxorrubicina/efeitos adversos , Hepatite B/virologia , Humanos , Masculino , Prednisona/efeitos adversos , Rituximab/efeitos adversos , Vincristina/efeitos adversos , Ativação Viral
6.
Intern Med ; 58(20): 2915-2922, 2019 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-31243222

RESUMO

Objective Hepcidin is a master iron regulator hormone produced by the liver, but precise mechanism underlying its involvement in iron overload in hepatitis C virus (HCV) infection remains unclear. We investigated the serum hepcidin levels against iron overload before and after HCV eradication. Methods We prospectively investigated the iron metabolism characteristics in 24 patients with HCV genotype 1b infection before and after treatment. We also assessed the serum erythroferrone (ERFE) levels to investigate its association with iron metabolism changes. Patients were treated with Ledipasvir 90 mg and Sofosbuvir 400 mg once daily for 12 weeks and observed for 12 more weeks in order to evaluate their sustained virological response. Results Serum hepcidin levels at baseline were in the normal range, although serum ferritin levels were increased. After HCV eradication, both serum ferritin and hepcidin levels were significantly decreased at 24 weeks from baseline (p<0.001, p=0.006, respectively). However, the serum hepcidin-to-ferritin ratios were significantly increased (p<0.001). In addition, the serum ERFE levels were significantly decreased (p<0.001). Increases in the serum hepcidin-to-ferritin ratios were correlated with decreases in the serum ERFE levels (ρ=-0.422, p=0.039). Conclusion Serum hepcidin levels were relatively low against ferritin levels in HCV infection. However, after HCV eradication, the serum hepcidin-to-ferritin ratios were increased. These results indicate the improvement of inadequate hepcidin secretion against iron overload after HCV eradication. Downregulation of ERFE may have affected the improvement of iron metabolism.


Assuntos
Antivirais/uso terapêutico , Ferritinas/sangue , Hepatite C Crônica/tratamento farmacológico , Hepcidinas/sangue , Hormônios Peptídicos/sangue , Adulto , Idoso , Benzimidazóis/uso terapêutico , Feminino , Fluorenos/uso terapêutico , Hepacivirus/isolamento & purificação , Hepatite C Crônica/sangue , Hepatite C Crônica/complicações , Hepatite C Crônica/virologia , Humanos , Ferro/sangue , Sobrecarga de Ferro/sangue , Sobrecarga de Ferro/virologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Sofosbuvir , Uridina Monofosfato/análogos & derivados , Uridina Monofosfato/uso terapêutico
7.
J Gastroenterol Hepatol ; 34(11): 2019-2027, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31144350

RESUMO

BACKGROUND: Direct-acting antivirals (DAAs) rapidly clear hepatitis C virus (HCV), but the lipid dynamics after DAA treatment remain unknown. Low-density lipoprotein (LDL) cholesterolemia is the predicting factor for the onset and death of atherosclerotic cardiovascular diseases. Thus, in this study, we examined the frequency and risk of hyper-LDL cholesterolemia in HCV patients who achieved sustained virologic response (SVR) with DAA treatment. METHODS: A total of 121 patients with HCV genotype 1b, who achieved SVR with DAA treatment, were examined for serum levels of total cholesterol, LDL-cholesterol (LDL-C), high-density lipoprotein, and triglycerides from the start of treatment until 2 years after SVR (SVR-2y). ΔLDL-C was defined as the change in LDL-C levels from treatment initiation to SVR-2y. Hyper-LDL cholesterolemia was defined as ≥ 140 mg/dL LDL-C at SVR-2y. Stepwise multiple regression analysis was performed to determine whether ΔLDL-C and hyper-LDL cholesterolemia are associated with other factors, including viral kinetics. RESULTS: A total of 63, 3, and 55 patients were administered daclatasvir + asunaprevir, ombitasvir + paritaprevir + ritonavir, and ledipasvir + sofosbuvir, respectively. ΔLDL-C in patients with the IL28B (rs8099917) TG/GG genotype was significantly higher than in those with IL28B TT (27.3 ± 27.0 and 9.6 ± 27.3 mg/dL; P < 0.001). In addition, IL28B TG/GG was an independent risk factor for hyper-LDL cholesterolemia (odds ratio: 8.47; P < 0.001). CONCLUSIONS: An IL28B polymorphism is associated with ΔLDL-C and hyper-LDL cholesterolemia after achieving SVR. Thus, lipid markers should be carefully monitored in patients who achieve SVR with DAA.


Assuntos
Antivirais/uso terapêutico , LDL-Colesterol/sangue , Hepatite C/tratamento farmacológico , Hepatite C/genética , Interferons/genética , Polimorfismo Genético , Idoso , Feminino , Hepatite C/sangue , Humanos , Masculino , Pessoa de Meia-Idade
8.
Intern Med ; 58(5): 661-665, 2019 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-30449774

RESUMO

A 70-year-old man was admitted for treatment of a single liver nodule that was detected by contrast-enhanced computed tomography. Twenty years earlier, the patient had been diagnosed with myelodysplastic syndrome-refractory anemia and secondary hemochromatosis but had not received erythrocyte transfusions. The current histological, computed tomography, and magnetic resonance imaging findings revealed hepatocellular carcinoma (HCC) and non-cirrhotic liver hemochromatosis. The liver tumor was treated using radiofrequency ablation therapy. Secondary hemochromatosis may be a risk factor for HCC, even if the liver is not cirrhotic. In such cases, additional surveillance may be required to detect the development of HCC.


Assuntos
Carcinoma Hepatocelular/etiologia , Hemocromatose/complicações , Neoplasias Hepáticas/etiologia , Idoso , Biópsia , Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/cirurgia , Ablação por Cateter/métodos , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/cirurgia , Imageamento por Ressonância Magnética , Masculino , Síndromes Mielodisplásicas/complicações , Fatores de Risco , Tomografia Computadorizada por Raios X , Ultrassonografia
9.
Clin J Gastroenterol ; 11(4): 338-342, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29417387

RESUMO

Fitz-Hugh-Curtis syndrome (FHCS) is characterized by perihepatic and pelvic inflammation and occurs mostly in women of childbearing age. Here, we report a case of FHCS caused by Chlamydia trachomatis in a 50-year-old man. The patient presented to our hospital with right upper quadrant abdominal pain, and enhanced computed tomography revealed perihepatic and pelvic free fluid and early-phase hepatic capsular enhancement. A urine specimen was positive for Chlamydia trachomatis. The patient was diagnosed with FHCS due to Chlamydia trachomatis infection. In conclusion, FHCS cannot be excluded when men present with right upper quadrant abdominal pain without significant signs of biliary tract disease.


Assuntos
Infecções por Chlamydia/diagnóstico , Chlamydia trachomatis/isolamento & purificação , Hepatite/diagnóstico , Doença Inflamatória Pélvica/diagnóstico , Peritonite/diagnóstico , Dor Abdominal/microbiologia , Antibacterianos/uso terapêutico , Antiulcerosos/uso terapêutico , Infecções por Chlamydia/microbiologia , Quimioterapia Combinada , Úlcera Duodenal/diagnóstico , Úlcera Duodenal/microbiologia , Hepatite/microbiologia , Humanos , Levofloxacino/uso terapêutico , Masculino , Pessoa de Meia-Idade , Omeprazol/uso terapêutico , Doença Inflamatória Pélvica/microbiologia , Peritonite/microbiologia , Urina/microbiologia
10.
Intern Med ; 57(2): 223-230, 2018 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-29033422

RESUMO

A 49-year-old woman who was asymptomatic was found to have a small liver tumor on abdominal ultrasonography (US) at her annual health checkup. US revealed a hypoechoic, solid, mass measuring 17-mm in size in segment 6. The tumor markers associated with liver malignancy were negative. An infectious disease screen was negative for hepatitis B surface antigen, but positive for antibody to hepatitis B core antigen. Imaging studies using computed tomography (CT), magnetic resonance imaging (MRI), and CT angiography suggested a malignant liver tumor, such as hepatocellular carcinoma. Partial hepatic resection of the posterior segment was performed. The pathological diagnosis was pseudolymphoma of the liver.


Assuntos
Neoplasias Hepáticas/complicações , Neoplasias Hepáticas/virologia , Pseudolinfoma/complicações , Pseudolinfoma/virologia , Carcinoma Hepatocelular , Feminino , Hepatite B , Antígenos de Superfície da Hepatite B , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/patologia , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Pseudolinfoma/diagnóstico , Pseudolinfoma/patologia , Tomografia Computadorizada por Raios X
11.
Clin J Gastroenterol ; 10(5): 459-463, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28884440

RESUMO

Ultrasonography in a 60-year-old man with chronic hepatitis C (CHC) demonstrated multiple hyperechoic nodules. Radiological investigations did not reveal any signs of malignancy. However, magnetic resonance chemical shift imaging showed multiple focal fatty changes in the liver. Urinary levels of uroporphyrin and coproporphyrin were elevated, and we made a diagnosis of porphyria cutanea tarda. Direct-acting antivirals, ledipasvir/sofosbuvir, were initiated for CHC, which led to sustained viral response, resolution of the liver nodules, and normalization of urinary porphyrin. Hepatitis C virus infection can cause porphyria cutanea tarda with multiple hyperechoic liver nodules, which might be cured by direct-acting antivirals.


Assuntos
Antivirais/uso terapêutico , Benzimidazóis/uso terapêutico , Fluorenos/uso terapêutico , Hepatite C Crônica/complicações , Hepatite C Crônica/tratamento farmacológico , Porfiria Cutânea Tardia/tratamento farmacológico , Porfiria Cutânea Tardia/etiologia , Uridina Monofosfato/análogos & derivados , Hepatite C Crônica/diagnóstico por imagem , Humanos , Fígado/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Porfiria Cutânea Tardia/diagnóstico por imagem , Sofosbuvir , Uridina Monofosfato/uso terapêutico
12.
Intern Med ; 56(15): 1943-1948, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28768961

RESUMO

Objective The aims of the present study were to determine the proportions of hepatitis B surface antigen (HBsAg)-positive and anti-hepatitis C virus (HCV)-positive patients, and identify the characteristics that influenced referral to a hepatologist. Methods The present study included patients who were positive for HBsAg (n=153) or anti-HCV (n=574); their viral status was tested by non-hepatologists between January 2008 to December 2012. We performed a multivariate analysis to investigate the factors associated with the referral of patients to hepatologists. Results The rates of hepatitis B virus (HBV) and the percentage of suspected HCV carriers at the hospital were 1.4% and 3.5%, respectively. Among the 727 patients who were seropositive for HBV or HCV, 107 (14.7%) were referred to a hepatologist. A multivariate analysis to investigate the factors contributing to referral revealed that (i) an alanine aminotransferase (ALT) level of >30 IU/L [odds ratio (OR), 3.24; 95% confidence interval (CI), 2.10-5.03; p<0.001]; (ii) undergoing testing at an internal medicine department (OR, 2.79; 95% CI, 1.80-4.38; p<0.001); and (iii) HBsAg-positivity (OR, 2.22; 95% CI, 1.35-3.61; p=0.002) were factors that significantly influenced referral. Conclusion Hepatologists must educate non-hepatologists, especially non-internists, to promote the referral of hepatitis-virus carriers, especially HCV carriers, even in patients with ALT levels of <30 IU/L.


Assuntos
Hepatite B/diagnóstico , Hepatite B/terapia , Hepatite C/diagnóstico , Hepatite C/terapia , Encaminhamento e Consulta/estatística & dados numéricos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Alanina Transaminase , Portador Sadio , Feminino , Gastroenterologistas , Hepatite B/imunologia , Antígenos de Superfície da Hepatite B/imunologia , Vírus da Hepatite B/imunologia , Hepatite C/imunologia , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
13.
Med Mol Morphol ; 50(4): 227-237, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28660384

RESUMO

Hepatic ATP-binding cassette A1 (ABCA1) transporter is the modulator of intrahepatic cholesterol levels via the efflux of cholesterol into plasma. This study aimed to determine the expression of hepatic ABCA1 levels in a cholestatic rat model and patients with primary biliary cholangitis (PBC). A cholesterol efflux study was conducted with Abca1 knock down using siRNA in WIF9 cells. Cholesterol levels in the ABCA1 siRNA cells in the medium were significantly decreased compared with those in controls (P < 0.05). Hepatic ABCA1 mRNA levels were significantly higher in BDL rats than in control rats (P < 0.05). Furthermore, the protein expression level of hepatic ABCA1 was also significantly increased by 200% in BDL rats (P < 0.05). In PBC patients, expression of hepatic ABCA1 mRNA was 2.2-fold higher than that in controls (P < 0.05). The level of hepatic liver X receptor (LXR)ß mRNA was correlated with ABCA1 mRNA levels in PBC patients. The expression of hepatic ABCA1 transporter was upregulated in both the cholestatic rat model and PBC patients. Upregulated hepatic ABCA1 may lead to efflux of cholesterol into plasma, thus explaining the mechanism of cholestasis leading to hypercholesterolemia.


Assuntos
Transportador 1 de Cassete de Ligação de ATP/genética , Colestase Intra-Hepática/genética , Colesterol/metabolismo , Hipercolesterolemia/genética , Cirrose Hepática Biliar/genética , Fígado/metabolismo , Transportador 1 de Cassete de Ligação de ATP/antagonistas & inibidores , Transportador 1 de Cassete de Ligação de ATP/metabolismo , Animais , Transporte Biológico , Linhagem Celular Tumoral , Colestase Intra-Hepática/metabolismo , Colestase Intra-Hepática/patologia , Modelos Animais de Doenças , Regulação da Expressão Gênica , Hepatócitos/metabolismo , Hepatócitos/patologia , Humanos , Hipercolesterolemia/metabolismo , Hipercolesterolemia/patologia , Fígado/patologia , Cirrose Hepática Biliar/metabolismo , Cirrose Hepática Biliar/patologia , Receptores X do Fígado/genética , Receptores X do Fígado/metabolismo , Masculino , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Ratos , Ratos Wistar , Transdução de Sinais
15.
Hepatol Res ; 47(4): 364-367, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27260815

RESUMO

Direct-acting antiviral agents for hepatitis C virus (HCV) have been developed such as combined daclatasvir (DCV) and asunaprevir (ASV) treatment. This typically enables HCV serotype 1 patients to achieve a high sustained virological response rate, but a small number of such patients fail to respond to therapy. We investigated three HCV patients who showed no response to DCV and ASV therapy. Hepatitis C genotyping was undertaken in the three patients using nested polymerase chain reaction and polymerase chain reaction direct sequencing in the core region of the HCV genome. All three patients possessed HCV serotype 1, and no mutations were identified in either the non-structural protein 3 or 5A region. The three patients were shown to be co-infected with HCV genotypes 1 and 2 because genotypes 2a and 2b were also identified. This is the first report into failed response to DCV and ASV therapy in patients co-infected with HCV genotypes 1 and 2.

16.
Artigo em Inglês | MEDLINE | ID: mdl-29201718

RESUMO

BACKGROUND AND AIMS: Insulin resistance and cytokine production are key mechanisms leading to fatty change in the liver and may produce nonalcoholic steatohepatitis (NASH). Oxidative stress may also contribute to clinical progression from simple fatty liver (FL) to NASH. A therapy for insulin resistance and antioxidant has been applied to treat NASH, yet these treatments are not fully established. In the present study, we have evaluated whether an antioxidant agent, glutathione, prevents the development of NASH from FL. MATERIALS AND METHODS: Five patients with FL and 10 with NASH were enrolled in the study. Three hundred milligrams per day of glutathione was given orally to patients with nonalcoholic fatty liver disease (NAFLD) every day, and an oxidative stress marker and biochemical tests were analyzed before treatment and 1 and 3 months after starting the treatment. We measured serum levels of 8-hydroxy-2-deoxyguanosine (8-OHdG) and gamma-glutamyltranspeptidase (GGT). Immunohistochemistry for glutathione was performed on formalin fixed liver specimens obtained from liver biopsies. RESULTS: Before treatment, the NASH group had higher serum 8-OHdG and lower serum glutathione levels than the FL group. Immunohistochemistry revealed that a strong expression of glutathione was observed in zone 3 in both NASH and FL before treatment. Serum levels of alanine transaminase and 8-OHdG were significantly decreased after treatment in the NASH group. Gamma-glutamyltranspeptidase was decreased after treatment, although the decrease was statistically not significant. DISCUSSION: The present pilot study demonstrated that antioxidant therapy with glutathione may reduce the pathological oxidative stress in the liver in NASH, preventing the progression from NAFLD to NASH. HOW TO CITE THIS ARTICLE: Irie M, Sohda T, Anan A, Fukunaga A, Takata K, Tanaka T, Yokoyama K, Morihara D, Takeyama Y, Shakado S, Sakisaka S. Reduced Glutathione suppresses Oxidative Stress in Nonalcoholic Fatty Liver Disease. Euroasian J Hepato-Gastroenterol 2016;6(1):13-18.

17.
Hepatol Res ; 45(10): E108-14, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25560223

RESUMO

AIM: In primary biliary cirrhosis (PBC), damaged hepatocytes resulting from chronic cholestasis follow a compensatory mechanism that alters hepatobiliary transporter expression to reduce the accumulation of potentially toxic compounds such as bile acid. Organic anion transporter peptide 1B3 (OATP1B3), which transports agents such as gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA), has reduced expression in the late stages of PBC. Therefore, we investigated the use of Gd-EOB-DTPA-enhanced magnetic resonance imaging (MRI) as a useful detection method for the advanced staging of PBC. METHODS: Stage I-III PBC (non-liver cirrhosis [LC]-PBC, n = 12), stage IV (LC-PBC, n = 6), and non-PBC patients (control group, n = 4) were included in this study. We obtained liver tissue samples by percutaneous liver biopsy. Hepatic OATP1B3 expression was determined immunohistochemically, and OATP1B3 mRNA levels were assessed using real-time reverse transcription polymerase chain reaction. The relative enhancement (RE) in the hepatobiliary phase was calculated using the signal intensity of Gd-EOB-DTPA-enhanced MRI. RESULTS: Immunohistochemistry revealed markedly reduced expression of OATP1B3 in hepatocytes around the central vein in LC-PBC patients. Hepatic OATP1B3 mRNA expression in LC-PBC patients was significantly lower than that in non-LC-PBC patients (P < 0.05). The RE on MRI was significantly decreased in the LC-PBC group (0.33 ± 0.14) compared with the non-LC-PBC (0.91 ± 0.15, P < 0.01) and control (0.92 ± 0.20, P < 0.01) groups. CONCLUSION: Gd-EOB-DTPA-enhanced MRI may provide a useful detection method for liver disease in patients with LC-PBC.

18.
Eur J Gastroenterol Hepatol ; 27(1): 55-64, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25370853

RESUMO

BACKGROUND: Telaprevir (TVR) plays a major role in renal damage and anemia associated with TVR/pegylated interferon/ribavirin therapy for chronic hepatitis C. Adjusting the TVR starting dose may reduce these adverse effects. We aimed to determine whether adjusting the starting dose according to renal function reduces TVR-associated renal damage and anemia and affects the sustained virological response (SVR). PATIENTS AND METHODS: Our study included 112 patients infected with hepatitis C genotype 1 treated with pegylated interferon/ribavirin/TVR triple therapy. The TVR starting dose adjusted according to renal function was calculated as TVR/unadjusted estimated glomerular filtration rate (eGFR) ratio=TVR/(eGFR×body surface area/1.73). RESULTS: A TVR/unadjusted eGFR ratio of 32 or greater was a predictor of renal impairment and anemia in multivariate analysis (odds ratio 12.09, P<0.001, and OR 4.14, P<0.001, respectively). Patients with a TVR/unadjusted eGFR ratio of 32 or greater developed significant renal impairment and anemia (P<0.001 and P=0.002, respectively). SVR was significantly reduced in patients with a TVR/unadjusted eGFR ratio less than 23 versus 23 or greater (66.7 and 87.2%, respectively, P=0.045). SVR tended to increase stepwise [<23.0 (66.7%), ≥23 to <32 (84.8%), and ≥32 (89.6%), respectively]. The TVR/unadjusted eGFR ratio was correlated significantly with the serum TVR concentration (r=0.541, P<0.001). CONCLUSION: Adjusting the TVR starting dose according to the TVR/unadjusted eGFR ratio decreased adverse effects and affected the SVR rate. The TVR starting dose should be adjusted by a TVR/unadjusted eGFR ratio of 23 or greater to less than 32 to safely achieve SVR.


Assuntos
Injúria Renal Aguda/induzido quimicamente , Anemia/induzido quimicamente , Antivirais/uso terapêutico , Hepatite C Crônica/tratamento farmacológico , Rim/fisiologia , Oligopeptídeos/administração & dosagem , Oligopeptídeos/efeitos adversos , Injúria Renal Aguda/fisiopatologia , Idoso , Anemia/sangue , Antivirais/efeitos adversos , Monitoramento de Medicamentos , Quimioterapia Combinada , Feminino , Genótipo , Taxa de Filtração Glomerular , Hemoglobinas/metabolismo , Hepacivirus/genética , Hepatite C Crônica/virologia , Humanos , Interferon alfa-2 , Interferon-alfa/uso terapêutico , Rim/efeitos dos fármacos , Masculino , Pessoa de Meia-Idade , Polietilenoglicóis/uso terapêutico , Proteínas Recombinantes/uso terapêutico , Estudos Retrospectivos , Ribavirina/uso terapêutico
19.
Hepatogastroenterology ; 61(130): 426-30, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24901155

RESUMO

BACKGROUND/AIMS: Recent studies have confirmed that iron overload is involved not only in liver carcinogenesis, but in its progression. Results in studies using liver cancer cell lines have suggested a relationship between transferrin receptor (TfR) expression and liver carcinogenesis, but TfR expression has not yet been analyzed in human hepatocellular carcinoma (HCC) tissues. METHODOLOGY: We immunohistochemically assessed the expression of TfR1 and TfR2 in tumor tissues and adjacent non-tumorous liver tissues from 41 HCC patients who underwent partial hepatectomy. We evaluated uptake of iron in hepatocytes and HCC cells using iron staining. RESULTS: The expression TfR was significantly higher in HCC samples than in adjacent non-tumor tissue (p < 0.001). TfR expression was significantly related to serum alpha-fetoprotein (p < 0.05) and des-gamma carboxy prothrombin (p < 0.05) concentrations. We also found iron deposition in non-tumor tissue from 25 patients, but in only two HCC samples, consistent with findings that hepatocellular iron uptake decreases with liver carcinogenesis. CONCLUSIONS: We investigated the expression of TfR1 and TfR2 in human HCC tissues by immunohistochemistry, the first report demonstrating TfR2 expression immunohistochemically in human HCC. These results suggest that TfR is expressed in response to iron deficiency during liver carcinogenesis.


Assuntos
Antígenos CD/análise , Carcinoma Hepatocelular/química , Neoplasias Hepáticas/química , Receptores da Transferrina/análise , Adulto , Idoso , Idoso de 80 Anos ou mais , Antígenos CD/biossíntese , Carcinoma Hepatocelular/metabolismo , Carcinoma Hepatocelular/patologia , Membrana Celular/química , Membrana Celular/metabolismo , Feminino , Hepatócitos/metabolismo , Humanos , Imuno-Histoquímica , Ferro/análise , Ferro/metabolismo , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/patologia , Masculino , Pessoa de Meia-Idade , Receptores da Transferrina/biossíntese
20.
Med Mol Morphol ; 47(4): 207-12, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24326379

RESUMO

The clinical course of patients with chronic hepatitis B (CH-B) was greatly changed by the introduction of nucleoside analogues. We often encounter patients where the serum level of albumin recovers quickly following the treatment. In this study, we focused carefully on the changes in serum albumin level noted during nucleoside analogue therapy, in an effort to clarify the mechanism behind the restoration of albumin production. We observed changes in serum albumin levels during nucleoside analogue therapy in 12 patients with CH-B and studied the mechanism behind the restoration of albumin production following the therapy. The serum level of albumin was significantly increased very soon after the treatment was started. Prior to treatment with nucleoside analogues, the albumin signal for mRNA was only slightly seen in the peri-portal area, whereas 12 months after the treatment, the liver tissue presented an obvious signal of albumin mRNA. Serum levels of hepatocyte growth factor (HGF) were significantly decreased 12 months after the treatment. In this study, we demonstrated that nucleoside analogues decrease HGF through the suppression of hepatocyte damage, leading to the restoration of albumin production in patients with CH-B.


Assuntos
Antivirais/uso terapêutico , Guanina/análogos & derivados , Hepatite B Crônica/sangue , Lamivudina/uso terapêutico , Albumina Sérica/metabolismo , Adulto , Idoso , Antivirais/farmacologia , Feminino , Expressão Gênica , Guanina/farmacologia , Guanina/uso terapêutico , Hepatite B Crônica/tratamento farmacológico , Fator de Crescimento de Hepatócito/sangue , Humanos , Lamivudina/farmacologia , Fígado/patologia , Masculino , Pessoa de Meia-Idade , Albumina Sérica/genética , Fator de Crescimento Transformador beta1/sangue , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA