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2.
J Viral Hepat ; 11(4): 302-9, 2004 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-15230852

RESUMEN

Chronic hepatitis C virus (HCV) infection is associated with the development of lymphoproliferative disorders (LPDs). The aim of this investigation was to determine the prevalence and characterization of monoclonal gammopathy and benign and malignant LPDs in individuals with chronic hepatitis C. A total of 233 subjects diagnosed with chronic hepatitis C (male/female ratio: 131/102, median age; 49 years) were studied. Serum and urine were examined for the presence of a monoclonal gammopathy. A bone marrow aspirate and biopsy was obtained in individuals with a monoclonal gammopathy. Thirty-two patients (13.7%, 32 of 233) had a monoclonal gammopathy; 75% of them were benign and were not associated with malignant disorders (24 of 32) while 25% were associated with malignant LPDs or a plasma cell disorder (eight of 32). Two additional subjects without monoclonal gammopathy were diagnosed as having a malignant LPDs. The prevalence of malignant LPDs/plasma cell disorder in individuals with HCV-induced chronic liver disease was 4.3%. No difference was found in terms of disease duration, HCV genotype, viral load, alanine aminotransferase level or histopathologic score between the subjects with or without a monoclonal gammopathy. The presence of mixed cryoglobulinaemia was strongly associated with the presence of an underlying malignant disorder. Hence a monoclonal gammopathy is found in 14% of patients with chronic hepatitis C and is associated with malignant B-cell LPD in more than a quarter of such patients. The prevalence of LPDs in individuals with HCV-induced chronic liver disease is greater than that of the normal healthy population.


Asunto(s)
Hepatitis C Crónica/complicaciones , Trastornos Linfoproliferativos/complicaciones , Adulto , Anciano , Alanina Transaminasa/sangre , Médula Ósea/patología , Crioglobulinemia/complicaciones , Femenino , Genotipo , Hepacivirus/genética , Hepacivirus/aislamiento & purificación , Hepatitis C Crónica/virología , Humanos , Hígado/patología , Trastornos Linfoproliferativos/epidemiología , Masculino , Persona de Mediana Edad , Gammopatía Monoclonal de Relevancia Indeterminada/complicaciones , Paraproteinemias/complicaciones , Células Plasmáticas/patología , Prevalencia , Factores de Riesgo , Carga Viral
3.
J Viral Hepat ; 11(2): 141-7, 2004 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-14996349

RESUMEN

Although hepatitis B virus (HBV) reactivation in HBV carriers undergoing immunosuppressive therapy is clearly documented, the role of antiviral prophylaxis in such individuals is still controversial. The aim of this study was to determine the efficacy of lamivudine prophylaxis in HBV carriers with haemato/oncological malignancies, who receive chemotherapy. Eighteen HBV carriers with malignancy, who were candidates for chemotherapy, were enrolled. Eight subjects (three with leukaemia, four with lymphoma and one with multiple myeloma) were enrolled for prophylactic lamivudine therapy. The remaining 10 patients (six with leukaemia, three with lymphoma and one with breast cancer) were not treated with lamivudine and were used as a control. Lamivudine was administered beginning on the same day as the chemotherapy and was maintained for a year after chemotherapy was discontinued. No HBV-related mortality was observed in either group. In the lamivudine-treated group, none of the subjects had clinical, biochemical or serological evidence of HBV reactivation during the time they were receiving chemotherapy and after their chemotherapy was discontinued. In contrast, five of the 10 HBV carriers not receiving lamivudine therapy experienced a reactivation of HBV infection. This reactivation of HBV was observed during the chemotherapy in four with one individual experiencing a HBV activation 12 months after chemotherapy was discontinued. No lamivudine-related major adverse effects were observed. Hence prophylactic lamivudine treatment in HBV carriers with haemato/oncological malignancy receiving chemotherapy prevents chemotherapy-induced HBV reactivation.


Asunto(s)
Portador Sano/virología , Neoplasias Hematológicas/complicaciones , Neoplasias Hematológicas/tratamiento farmacológico , Hepatitis B/prevención & control , Lamivudine/uso terapéutico , Adulto , Anciano , Antineoplásicos/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Antivirales/uso terapéutico , ADN Viral/sangre , Femenino , Anticuerpos contra la Hepatitis B/sangre , Antígenos de la Hepatitis B/sangre , Virus de la Hepatitis B/aislamiento & purificación , Humanos , Lamivudine/administración & dosificación , Masculino , Persona de Mediana Edad
4.
J Viral Hepat ; 10(5): 360-6, 2003 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-12969188

RESUMEN

Hepatitis C virus (HCV) infects hepatocytes and utilizes the hepatocyte to replicate. In so doing, many hepatocyte activities are shifted from their native state to one reflecting liver cell stress. Thrombomodulin and tissue factor are endothelial cell proteins that are expressed as a result of tissue injury or stress. Urokinase is a serine protease, which has been implicated in a number of physiologic and pathologic processes related to cellular stress and or injury. Nitric oxide is produced by cells in response to injury and functions both as a vasodilator and as an activator of a large number of cytokine cascades. NFkappaB is a transcription factor that forms one of the first lines of cellular defense against infection and hepatocellular stress. The levels of these four factors in plasma, hepatocyte cytosol and hepatocyte nuclear extracts provide a precise panoramic measure of cellular stress. Plasma, hepatocyte cytosol and nuclear extracts of hepatocytes were assayed for these four factors in 17 patients treated with alphaIFN for chronic hepatitis C. Five of the 17 were responders while 12 were nonresponders. Ten normal controls and 1 normal control liver were assayed also for each parameter. Nonresponders had 2x the plasma urokinase levels of responders and normals. The cytosol prepared from hepatocytes of nonresponders had a urokinase level 15-fold that of the controls and responders to IFN therapy. Plasma thrombomodulin levels in nonresponders were sixfold greater than those of responders and controls. The levels of all of the other measures in plasma, cytosol and nuclear extracts of liver tissue varied minimally between responders and nonresponders and the normal controls. These data demonstrate that: (i) urokinase levels in plasma and more clearly in cytosol are greater in nonresponders than responders, and (ii) plasma thrombomodulin levels in nonresponders are sixfold greater than those of responders and controls. These data suggest that urokinase and thrombomodulin may be unique markers of cellular and endothelial stress present in individuals with chronic hepatitis C. These markers might be useful during the clinical course of chronic hepatitis C, as a means of gauging the tissue response to therapy.


Asunto(s)
Hepatitis C Crónica/metabolismo , FN-kappa B/metabolismo , Óxido Nítrico/metabolismo , Trombomodulina/metabolismo , Tromboplastina/metabolismo , Biomarcadores/análisis , Biopsia , Núcleo Celular/metabolismo , Citosol/metabolismo , Femenino , Hepatitis C Crónica/sangre , Hepatitis C Crónica/tratamiento farmacológico , Hepatitis C Crónica/patología , Humanos , Inyecciones Subcutáneas , Interferón alfa-2 , Interferón-alfa/uso terapéutico , Hígado/metabolismo , Hígado/patología , Masculino , Persona de Mediana Edad , FN-kappa B/análisis , Óxido Nítrico/análisis , Proteínas Recombinantes , Trombomodulina/análisis , Tromboplastina/análisis , Resultado del Tratamiento , Activador de Plasminógeno de Tipo Uroquinasa/análisis , Activador de Plasminógeno de Tipo Uroquinasa/metabolismo
5.
Eur J Med Res ; 8(7): 304-6, 2003 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-12911867

RESUMEN

Familial Mediterranean fever (FMF) is an autosomal recessive disorder characterized by recurrent fever of unknown origin, renal amyloidosis, peritonitis, pleuritis and/or synovitis. There have been many studies to elucidate the etiopathogenesis of FMF. IL-6 is a cytokine that can induce the formation of serum amyloid A and C-reactive protein, both of which are important in development of amyloidosis. IL-6 was determined to be strongly associated in the etiopathogenesis of periodic fever in Chinese-pei dogs. The dogs with this syndrome experience periodic fever, arthritis, renal amyloidosis, a clinical picture very alike of human FMF. Here, we aimed to study mainly whether IL-6 had a similar etiopathogenetic role in human FMF as in Chinese-pei dogs syndrome. The median IL-6 blood levels were found to be higher in patients with acute (n=8) FMF attack (1.85 U/ml) compared to those (n=33) with asymptomatic ones (1.0 U/ml) (p=0.16). There are mainly two results: first; the study should be designed with a larger sample size of patients with acute attack in order to alleviate underestimation of significance, second; sampling time may give various results because of dynamic changes of cytokine levels during acute attack period.


Asunto(s)
Fiebre Mediterránea Familiar/sangre , Fiebre Mediterránea Familiar/inmunología , Interleucina-6/sangre , Factor de Necrosis Tumoral alfa/metabolismo , Adolescente , Adulto , Animales , Perros , Fiebre Mediterránea Familiar/etiología , Femenino , Humanos , Masculino , Persona de Mediana Edad
6.
J Viral Hepat ; 10(4): 310-7, 2003 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-12823599

RESUMEN

Individuals with chronic hepatitis C (CHC) progress to cirrhosis and hepatic cancer. Individuals with advanced CHC are coagulopathic and can manifest fibrinolysis. The coagulopathy is a consequence of hepatocytic dysfunction. The fibrinolysis represents a response to local endothelial cell injury, and is of a low-grade. Based upon this hypothesis, the effect of the infusion of recombinant human factor VIIa (rh-FVIIa) on endothelial cell inflammatory integrins and measures of endothelial stress were determined in 17 individuals with advanced CHC. Immediately prior to the infusion of rh-FVIIa, the plasma levels of tissue factor (TF), Thrombomodulin (TM), human soluble ICAM-1 (hs-ICAM-1), human soluble VCAM-1 (hs-VCAM-1), human soluble L-Selectin (hs-L-Selectin), the prothrombin time and the activated partial thromboplastin time were determined. The same parameters were assayed at 5, 10, 30, 120, 240 and 360 min after infusion. TF and TM levels were very high at baseline consistent with a vascular endothelial stress response. Similarly hs-ICAM-1, hs-VCAM-1 as well as L-Selectin levels were increased. Thirty minutes after the infusion, a marked reduction in ICAM-1 and VCAM-1 and to a lesser degree L-Selectin levels was observed. This reduction persisted for 360 min. No change in measures of fibrinolysis [plasminogen activator inhibitor-1 (PAI-1), total tissue factor pathway inhibitor (t-TFPI), activated tissue factor pathway inhibitor (TFPIa), d-dimers (DD), FSP and fibrinogen levels] occurred. In addition, no change in plasma Annexin-V was observed. Based upon these data it can be concluded that: (1) rh-FVIIa corrects the coagulopathy seen in advanced CHC; (2) reduces endothelial cell injury and/or stress as evidenced by the TF, TM, hs-ICAM-1 and hs-VCAM-1 levels in plasma; (3) these changes in coagulation occurred without inducing a propagated vascular thrombosis.


Asunto(s)
Biomarcadores/sangre , Factor VIIa/uso terapéutico , Hepatitis C Crónica/sangre , Hepatitis C Crónica/tratamiento farmacológico , Mediadores de Inflamación/sangre , Integrinas/sangre , Adulto , Anciano , Anexina A5/sangre , Estudios de Casos y Controles , Selectina E/sangre , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Molécula 1 de Adhesión Intercelular/sangre , Masculino , Persona de Mediana Edad , Probabilidad , Valores de Referencia , Factores de Riesgo , Sensibilidad y Especificidad , Índice de Severidad de la Enfermedad , Estrés Fisiológico , Trombomodulina/sangre , Tromboplastina
7.
Dig Dis Sci ; 47(3): 579-85, 2002 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-11911346

RESUMEN

In Japan, most cases of gastric carcinoid tumor (GCT) are unassociated with either autoimmune gastritis (AIG) showing type-A chronic atrophic gastritis (CAG-A) or Zollinger-Ellison syndrome (ZES). However, the pathogenesis of this tumor remains unknown. Recent studies have determined that Helicobacter pylori infection induces gastric carcinoid in Mongolian gerbils and that H. pylori lipopolysaccharide exerts a mitogenic effect on ECL cells. We examined five patients with histologically diagnosed GCT, 40 patients with H. pylori-positive gastric ulcer (Hp+GU), 24 patients with H. pylori-positive duodenal ulcer (Hp+DU), and 12 patients with AIG showing CAG-A topographically. We compared the prevalence of H. pylori infection, and the levels of gastrin and pepsinogen (PG) in the serum of patients with GCT with those of patients with Hp+GU, or Hp+DU, and AIG. We also investigated the histological characteristics of the tumor and the gastric corpus mucosa in the GCT patients. The levels of serum gastrin and PG I and II were measured using an RIA kit. In all five (100%) patients with GCT, H. pylori infection was present, without any evidence of AIG or ZES. The serum levels of gastrin in the GCT patients were higher than those in either Hp+GU or Hp+DU patients and lower than those in the AIG patients. In contrast, serum PG I levels and the PG I/II ratio were lower in the GCT group than in the Hp+GU or Hp+DU groups. Histologically, all GCTs were ECL cell tumors and peritumoral corporal mucosal atrophy was observed in four of the five patients with GCT. In conclusions, H. pylori infection and hypergastrinemia were found in the patients with GCT without AIG. This finding suggests that H. pylori infection may induce corporal mucosal atrophy and hypergastrinemia that can produce a GCT with time.


Asunto(s)
Enfermedades Autoinmunes/complicaciones , Tumor Carcinoide/microbiología , Gastritis/complicaciones , Infecciones por Helicobacter/complicaciones , Helicobacter pylori , Neoplasias Gástricas/microbiología , Adulto , Anciano , Anciano de 80 o más Años , Enfermedades Autoinmunes/sangre , Enfermedades Autoinmunes/microbiología , Tumor Carcinoide/sangre , Tumor Carcinoide/complicaciones , Úlcera Duodenal/sangre , Úlcera Duodenal/complicaciones , Úlcera Duodenal/microbiología , Femenino , Gastrinas/sangre , Gastritis/sangre , Gastritis/inmunología , Gastritis/microbiología , Gastritis Atrófica/sangre , Gastritis Atrófica/complicaciones , Gastritis Atrófica/microbiología , Humanos , Masculino , Persona de Mediana Edad , Pepsinógeno A/sangre , Pepsinógeno C/sangre , Úlcera Péptica/sangre , Úlcera Péptica/complicaciones , Úlcera Péptica/microbiología , Neoplasias Gástricas/sangre , Neoplasias Gástricas/complicaciones
8.
Endocrine ; 14(2): 213-9, 2001 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-11394639

RESUMEN

Fetal alcohol syndrome usually implies effects on the offspring of maternal EtOH consumption during gestation, with fewer reports addressing the impact of paternal exposure on the progeny. One previous report has dealt with the impact of EtOH exposure on peripubertal male rats as a model of teenage drinking and the deleterious effects on the offspring. We report here findings examining the effect of 2 mo of EtOH feeding on male animals as they progressed through puberty on their ability to impregnate EtOH-naive female rats and characteristics of the subsequent litters. The EtOH-imbibing fathers weighed significantly less than pairfed controls and animals ingesting a non-EtOH liquid diet ad libitum. Nevertheless, they were able to mate successfully, although fecundity was significantly reduced. The number of successful pregnancies, defined as carried to term, was diminished from 92% in controls to 75% in EtOH-fed animals (p < 0.05). There was increased paternal testicular oxidative injury demonstrated by enhanced lipid peroxidation, protein oxidation, and decreased ratio of reduced to oxidized glutathione. The litter size of the EtOH-exposed males was reduced by 46%. The average litter size was 12.4+/-1.5 pups/litter in ad libitum animals, virtually identical to the 12.5+/-0.6 pups/litter in the pair fed controls. This is in sharp contrast to the 6.7+/-0.1 pups/litter from the paternal EtOH matings (p < 0.001). There was an increase in the average individual weight of pup offspring of paternally EtOH-exposed animals (p < 0.01 vs pair-fed controls and p < 0.05 vs ad libitum). Curiously, the male-to-female pup ratio was altered with a higher preponderance of male offspring from EtOH-fed fathers. There were no gross malformations noted among the pups. Insulin-like growth factor-1 levels in the pups at 10 d of age were unaltered between the groups. However, leptin was significantly elevated in the EtOH offspring. It appears that chronic EtOH exposure in the peripubertal fathers subsequently decreases fecundity and that this may be mediated by testicular oxidative injury, perhaps leading to accelerated germ cell apoptosis.


Asunto(s)
Etanol/administración & dosificación , Etanol/efectos adversos , Padre , Maduración Sexual , Animales , Animales Recién Nacidos/sangre , Femenino , Glutatión/metabolismo , Infertilidad Masculina/inducido químicamente , Factor I del Crecimiento Similar a la Insulina/análisis , Leptina/análisis , Peroxidación de Lípido , Tamaño de la Camada , Masculino , Oxidación-Reducción , Estrés Oxidativo , Embarazo , Ratas , Ratas Sprague-Dawley , Testículo/metabolismo
9.
Thromb Haemost ; 85(4): 667-70, 2001 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-11341503

RESUMEN

Thrombin Activatable Fibrinolysis Inhibitor (TAFI) is a 60 kappaD glycoprotein present in plasma that regulates fibrinolysis by limiting the amount of fibrin available for fibrinolysis by tissue plasminogen activator (t-PA). Chronic liver disease is well-known to be associated with a low-grade fibrinolytic syndrome that under the appropriate stimulus proceeds to an overt disseminated intravascular coagulopathy (DIC) with demonstrable bleeding. In the present study, TAFI activity was measured in the plasma of 74 patients with advanced liver disease, and the levels of TAFI were related to those of other important coagulation and fibrinolytic factors. TAFI levels were very low and essentially undetectable in the plasma of patients with advanced hepatocellular liver disease. No relationship with the degradation products of fibrin was evident.


Asunto(s)
Carboxipeptidasa B2/sangre , Hepatopatías/sangre , Adulto , Anciano , Biomarcadores , Pruebas de Coagulación Sanguínea , Carboxipeptidasa B2/deficiencia , Enfermedad Crónica , Coagulación Intravascular Diseminada/sangre , Coagulación Intravascular Diseminada/etiología , Femenino , Hepatitis Viral Humana/sangre , Humanos , Leucemia Promielocítica Aguda/sangre , Cirrosis Hepática/sangre , Hepatopatías/complicaciones , Pruebas de Función Hepática , Masculino , Persona de Mediana Edad , Albúmina Sérica/análisis
10.
Am J Kidney Dis ; 37(6): 1144-51, 2001 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-11382682

RESUMEN

Although transjugular renal biopsy has been used extensively in Europe, experience with its use in the United States has been limited. We report 25 patients who underwent both transjugular liver and renal biopsies in the same sitting and 4 patients who underwent only a transjugular renal biopsy. All 29 patients had both liver disease and renal abnormalities. Each patient was also believed to have a relative or absolute contraindication to a percutaneous renal biopsy (usually in the form of a bleeding abnormality). Transjugular renal biopsy yielded a quantity of tissue sufficient for diagnosis in all but 1 patient. The mean number of glomeruli obtained per biopsy was 19.4 +/- 12.2 (SD). Pathological diagnoses found were tubular injury in 5 patients, membranoproliferative glomerulonephritis in 5 patients, nephrosclerosis in 3 patients, diabetic nephropathy in 2 patients, immunoglobulin A (IgA) nephropathy in 2 patients, minimal change disease in 2 patients, end-stage renal disease in 2 patients, nonspecific changes in 1 patient, early glomerulosclerosis in 1 patient, tubular atrophy only in 1 patient, and normal renal histological characteristics in 4 patients. One patient with suspected IgA nephropathy had no histological diagnosis established because of a lack of glomeruli in the biopsy specimen. There were no instances of major bleeding from the perirenal area; however, a small perirenal hematoma was identified in 3 patients by postbiopsy computed tomography or sonography. Thus, based on our experience, transjugular renal biopsy appears to be a safe and effective procedure for establishing a histological diagnosis and is an attractive alternative biopsy method for patients with advanced liver disease and contraindications to conventional percutaneous renal biopsy.


Asunto(s)
Biopsia/métodos , Riñón/patología , Hepatopatías/patología , Adulto , Anciano , Creatinina/sangre , Femenino , Humanos , Enfermedades Renales/patología , Hígado/patología , Masculino , Persona de Mediana Edad
11.
Clin Liver Dis ; 5(1): 219-57, viii, 2001 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11218917

RESUMEN

Primary angiosarcoma of the liver accounts for up to 2% of all primary liver tumors and is the second most common primary malignant neoplasm of the liver. Approximately 10 to 20 new cases are diagnosed every year in the United States and the prevalence varies from 0.14 to 0.25 per million. In an autopsy series from Chicago, one hepatic angiosarcoma was noted for every 30 cases of hepatocellular carcinoma.


Asunto(s)
Neoplasias Hepáticas/patología , Carcinoma de Células Escamosas/patología , Carcinoma de Células Escamosas/terapia , Diagnóstico Diferencial , Hemangioendotelioma Epitelioide/diagnóstico por imagen , Hemangioendotelioma Epitelioide/patología , Hemangioendotelioma Epitelioide/terapia , Hemangiosarcoma/diagnóstico por imagen , Hemangiosarcoma/patología , Hemangiosarcoma/terapia , Humanos , Leiomiosarcoma/patología , Leiomiosarcoma/terapia , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Hepáticas/terapia , Linfoma/diagnóstico por imagen , Linfoma/patología , Linfoma/terapia , Pronóstico , Radiografía , Sarcoma/diagnóstico por imagen , Sarcoma/patología , Sarcoma/terapia
13.
Alcohol Clin Exp Res ; 24(10): 1550-6, 2000 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11045864

RESUMEN

BACKGROUND: Chronic ethanol abuse causes testicular atrophy and male infertility in alcoholic men. It is well known that ethanol exposure disrupts the hypothalamic-pituitary-gonadal axis, adversely affects the secretory function of Sertoli cells, and produces oxidative stress within the testes. It is still not clear what cellular mechanisms are responsible for the morphologic alteration of the testes that results in a reduction of testicular mass as a consequence of ethanol exposure. The hypothesis tested was that ethanol enhances apoptosis of testicular germ cells. METHODS: In the experiments of chronic ethanol exposure, male Sprague Dawley rats (Harlan Sprague Dawley, Inc., Indianapolis, IN) were fed Liber-Decarlie liquid diet for 9 weeks. In the experiments of acute ethanol exposure, a small volume of 20% ethanol solution was administered by intratesticular injection. Both 3'-end labeling of isolated testicular deoxyribonucleic acid (DNA) and labeling of apoptotic cells in situ by the terminal deoxynucleotidyl transferase-mediated deoxyuridine 5'-triphosphate nick end-labeling method were used to determine apoptosis rates within the testes. The expression of proteins involved in apoptosis was assessed by reverse transcription-polymerase chain reaction and by Western blotting. RESULTS: The testes of rats that were fed an ethanol-containing liquid diet had more testicular DNA fragmentation than did those of animals that were fed an isocaloric control diet. Ethanol increased the number of apoptotic spermatogonia as well as spermatocytes. Direct intratesticular injections of ethanol solution enhanced testicular DNA fragmentation, suggesting an increase in apoptosis. Moreover, Fas ligand levels were increased within the testes of rats that were chronically fed ethanol. In vitro, ethanol treatment of cultured Sertoli cells enhanced the production of Fas ligand. In addition, testicular levels of p53 messenger ribonucleic acid were increased in rats that were chronically fed ethanol. CONCLUSIONS: All of these observations suggest that ethanol enhances testicular germ cell apoptosis.


Asunto(s)
Apoptosis/efectos de los fármacos , Etanol/farmacología , Proteínas Proto-Oncogénicas c-bcl-2 , Testículo/citología , Animales , Western Blotting , Células Cultivadas , Fragmentación del ADN , Etanol/administración & dosificación , Proteína Ligando Fas , Regulación de la Expresión Génica/efectos de los fármacos , Genes p53/genética , Etiquetado Corte-Fin in Situ , Inyecciones , Masculino , Glicoproteínas de Membrana/análisis , Proteínas Proto-Oncogénicas/análisis , Ratas , Ratas Sprague-Dawley , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Testículo/química , Testículo/efectos de los fármacos , Proteína X Asociada a bcl-2 , Receptor fas/análisis
14.
Alcohol Clin Exp Res ; 24(9): 1443-8, 2000 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-11003212

RESUMEN

BACKGROUND: Burned patients with detectable blood alcohol levels (BAL) show an elevated mortality rate. Interleukin (IL)-6 and reactive oxygen species (ROS) production is stimulated independently by alcohol and burn injury. The aim of the study was to determine whether increasing levels of alcohol differentially enhance the hepatic production of IL-6 and ROS after burn in a murine model of dorsal scald injury. Groups of mice received either saline or alcohol intraperitoneally to reach a BAL of 100 mg/dl or 300 mg/dl at the time of burn (15% total body surface scald) or sham injury. RESULTS: Burn injury alone resulted in a low mortality rate at 24 hr after injury as did the burn group with a BAL of 100 mg/dl (15%), whereas 57% of the mice burned with a BAL of 300 mg/dl did not survive (p = 0.02). Twenty-four hours after burn or sham injury, IL-6 levels were measured by enzyme-linked immunosorbent assay in serum and liver. In the saline-treated group, IL-6 circulating and hepatic levels rose after burn injury (p < 0.03). Circulating IL-6 levels in sham mice increased 1.5-fold in the group with a BAL of 100 mg/dl and 3-fold in those with a BAL of 300 mg/ml (p = 0.005 versus burn-injured, saline-treated). IL-6 hepatic production after burn injury was higher in the mice with a BAL of 300 mg/dl than in those with a BAL of 100 mg/dl and the saline-treated group (p = 0.001). Among the burned mice, alcohol exposure increased hepatic ROS production, measured by lipid peroxidation and protein oxidation, in a dose-dependent manner. CONCLUSIONS: Alcohol enhances in a dose-dependent manner the hepatic production of IL-6 induced by burn injury through the modulation of oxidative stress. The increased mortality rate of mice exposed to alcohol and burn injury may be due to the adverse effect on immune function induced by IL-6 elevation.


Asunto(s)
Quemaduras/metabolismo , Depresores del Sistema Nervioso Central/administración & dosificación , Etanol/administración & dosificación , Interleucina-6/metabolismo , Hígado/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Animales , Quemaduras/inmunología , Depresores del Sistema Nervioso Central/sangre , Relación Dosis-Respuesta a Droga , Etanol/sangre , Interleucina-6/inmunología , Hígado/inmunología , Hígado/metabolismo , Masculino , Ratones , Ratones Endogámicos C57BL , Estrés Oxidativo/fisiología , Especies Reactivas de Oxígeno/inmunología , Especies Reactivas de Oxígeno/metabolismo
15.
Alcohol Clin Exp Res ; 24(9): 1467-73, 2000 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-11003215

RESUMEN

BACKGROUND: Oxidative stress contributes to the development of liver injury after chronic alcohol intake. Women exhibit greater sensitivity to alcohol-induced liver disease than do men. The aim of the study was to determine the relationship between the sex hormone status of male and female rats and the degree of alcohol-induced oxidative stress in the liver. METHODS: Male and female rats were pair-fed a liquid diet that contained 36% of their total daily calories as ethanol (EtOH group) or maltose (control group). Blood and liver samples were collected at the end of 8 weeks of diet. RESULTS: Male EtOH rats experienced a reduction in plasma testosterone (T) and an increase in estradiol (E2) levels, with an increase in their calculated E2/T ratio with respect to their controls. Malonaldehyde (MDA) levels, an index of lipid peroxidation, and protein carbonyl content, an index of protein oxidation, in the liver were greater among the EtOH groups in females than in males. In males, an inverse correlation was found between hepatic MDA and circulating T levels, and a direct correlation was disclosed between MDA and estradiol levels. In addition, the hepatic histopathological score correlated inversely with the plasma T levels and directly with the calculated E2/T ratio, an index of feminization. CONCLUSIONS: Alcohol-induced oxidative injury, which contributes to hepatic injury in both male and female rats, is enhanced in females compared with males. A role for plasma T levels in protecting male rat liver from ethanol-induced oxidative injury can be hypothesized.


Asunto(s)
Depresores del Sistema Nervioso Central/farmacología , Estradiol/sangre , Etanol/farmacología , Hígado/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Testosterona/sangre , Animales , Femenino , Hormonas Esteroides Gonadales/sangre , Hígado/metabolismo , Masculino , Malondialdehído/metabolismo , Estrés Oxidativo/fisiología , Ratas , Ratas Sprague-Dawley , Factores Sexuales
16.
Eur J Gastroenterol Hepatol ; 12(6): 707-9, 2000 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-10912494

RESUMEN

A case of cryptogenic cirrhosis in a patient with Turner's syndrome is presented. The individual was admitted for upper gastrointestinal bleeding due to oesophageal varices. After failure of medical treatment, a transjugular intra-hepatic portal systemic shunt was used to control the bleeding. A liver biopsy revealed cirrhosis with minimal necro-inflammatory activity and no steatosis. Immunohistochemical staining for HCV, HBsAg and HBcAg was negative. No other risk factor for liver disease was recognized and none of the known causes of chronic liver disease was identified after a thorough evaluation for such. Turner's syndrome is a genetic disorder due to X chromosome monosomy in which a wide range of congenital anomalies can occur. Cardiac, renal and skeletal anomalies are all well recognized. The possible association of Turner's syndrome with cirrhosis is herein discussed along with a review of the published literature.


Asunto(s)
Cirrosis Hepática/complicaciones , Síndrome de Turner/complicaciones , Adulto , Várices Esofágicas y Gástricas/etiología , Femenino , Hemorragia Gastrointestinal , Humanos
17.
Hepatology ; 31(5): 1183-91, 2000 May.
Artículo en Inglés | MEDLINE | ID: mdl-10796896

RESUMEN

Nuclear factor kappaB (NF-kappaB) is activated during viral infection and is central to the regulation of host immune responses. The NF-kappaB activation status and its morphological sources were assessed by immunohistochemistry in allograft biopsy specimens of orthotopic liver transplantation patients with recurrent hepatitis C virus (HCV). Hepatocellular NF-kappaB immunostaining was detected in HCV cases compared with controls (nontransplant: P <.001; transplant: P =.006), which correlated with the number of NF-kappaB positive hepatocytes (P =.007) and contrasted to the absent to weak staining of controls (nontransplant: P =.001; transplant: P =.009). Enhanced NF-kappaB staining of cytokeratin 19-positive bile ducts and proliferating ductules in the HCV group was in contrast to controls. Intense NF-kappaB immunoreactivity was detected in CD68-positive Kupffer cells and macrophages of all HCV specimens compared with a few controls (nontransplant: P <.001; transplant: P =.001) and contrasted to the weak staining of controls (nontransplant: P <.001; transplant: P =.001). NF-kappaB-positive immunoreactivity correlated with the number of T cell receptor (TCR) alpha/beta-positive lymphocytes (P <.001), which was not observed in controls. In those HCV cases showing evidence of necroinflammatory activity (grade) and individual features of portal inflammation, periportal inflammation/piecemeal necrosis, lobular inflammation, and fibrosis (stage), higher NF-kappaB staining intensity scores within bile ducts, proliferating ductules, hepatocytes (piecemeal necrosis: P =.016; stage: P =.030), and lymphocytes (stage: P =.044) and increased number of NF-kappaB-positive cells within bile ducts, proliferating ductules (grade, lobular inflammation, piecemeal necrosis, stage: P =.022), hepatocytes, and lymphocytes were observed. Increased staining intensity and frequency of NF-kappaB-positive cells were similarly observed in HCV-positive allografts obtained from patients under tacrolimus- compared with cyclosporine-based immunosuppression. These data implicate an immunoregulatory role of intragraft NF-kappaB activation in the pathogenesis and progression of posttransplantation HCV disease recurrence.


Asunto(s)
Hepatitis C/inmunología , Trasplante de Hígado/efectos adversos , FN-kappa B/análisis , Adulto , Anciano , Ciclosporina/farmacología , Dimerización , Femenino , Hepatitis C/patología , Hepatitis C/virología , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad , FN-kappa B/química , FN-kappa B/metabolismo , ARN Viral/análisis , Recurrencia , Tacrolimus/farmacología
18.
Am J Gastroenterol ; 95(12): 3529-36, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11151889

RESUMEN

OBJECTIVE: Individuals with chronic hepatitis C who are anti-HBc positive may carry an occult hepatitis B virus (HBV) infection that can affect their response to antiviral therapy. METHODS: In this study the prevalence of anti-HBc and HBV-DNA positivity was assessed in the serum and liver of 285 HCV-RNA-positive subjects treated with interferon-alpha at 5 mU/day for 12 months. The response to interferon (normal ALT and undetectable serum HCV-RNA) was evaluated at three different endpoints: 1) after 6 months; 2) at the end of treatment; and 3) 6 months after interferon discontinuation. RESULTS: Ninety individuals were anti-HBc positive (32%), 2 of these were HBV-DNA positive in serum and 7 in liver (8%). None of the anti-HBc-negative individuals was HBV-DNA positive in serum or liver. The prevalence of cirrhosis was greater in the anti-HBc-positive group than in the anti-HBc-negative group (p < 0.05), whereas HCV-RNA levels were lower. Anti-HBc-positive individuals had a lower response rate to interferon at 6 months and at the end of treatment as compared to anti-HBc-negative subjects (respectively 42% vs 66%, p < 0.01; and 32% vs 57%, p < 0.01). No difference between the two groups in terms of sustained response was detected 6 months after interferon discontinuation. CONCLUSIONS: The prevalence of anti-HBc is high among HCV-positive individuals. HCV-positive individuals who are anti-HBc positive have: 1) a higher prevalence of cirrhosis; 2) lower HCV-RNA levels; and 3) an impaired ability to respond to interferon treatment.


Asunto(s)
Hepatitis B/complicaciones , Hepatitis C Crónica/complicaciones , Adulto , Antivirales/uso terapéutico , Biopsia con Aguja , ADN Viral/análisis , Femenino , Hepacivirus/genética , Hepatitis B/epidemiología , Hepatitis B/inmunología , Antígenos de Superficie de la Hepatitis B/análisis , Virus de la Hepatitis B/genética , Anticuerpos contra la Hepatitis C/inmunología , Hepatitis C Crónica/tratamiento farmacológico , Hepatitis C Crónica/virología , Humanos , Interferón alfa-2 , Interferón-alfa/uso terapéutico , Hígado/patología , Hígado/virología , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , ARN Viral/análisis , Proteínas Recombinantes , Estudios Seroepidemiológicos
19.
Am J Gastroenterol ; 95(12): 3634-7, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11151906

RESUMEN

Herbal medicines are gaining widespread popularity. Much of the public believes that botanical herbs are both harmless and useful for the treatment of a variety of symptoms. This belief stands in contrast with the fact that many herbal therapies have been shown to be toxic. In the present case report, cascara sagrada (CS) has been associated with the development of cholestatic hepatitis, complicated by portal hypertension. CS is a mixture of ingredients, among which is anthracene glycoside--an herbal agent that previously has been associated with chronic hepatitis. The liver injury in the case herein reported is believed to be related to either anthracene glycoside or one of the other constituents of CS.


Asunto(s)
Catárticos/efectos adversos , Enfermedad Hepática Inducida por Sustancias y Drogas/etiología , Colestasis Intrahepática/inducido químicamente , Colestasis Intrahepática/complicaciones , Hipertensión Portal/etiología , Fitoterapia , Rhamnus/efectos adversos , Biopsia , Enfermedad Hepática Inducida por Sustancias y Drogas/patología , Colestasis Intrahepática/patología , Humanos , Hipertensión Portal/patología , Hígado/efectos de los fármacos , Hígado/patología , Masculino , Persona de Mediana Edad
20.
Hepatogastroenterology ; 46(28): 2529-31, 1999.
Artículo en Inglés | MEDLINE | ID: mdl-10522033

RESUMEN

Treatment of chronic hepatitis B virus (HBV) infection in an individual with periarteritis nodosum is described. A combination of famciclovir, granulocyte macrophage colony stimulating factor (GM-CSF) and interferon alpha 2b was utilized. The periarteritis, but not the HBV infection, responded to immunosuppressive therapy consisting of cyclophosphamide and glucocorticoids. Moreover, the patient failed to clear this HBV infection, despite a full year of interferon therapy at 5 MU daily. With the addition of famciclovir and GM-CSF, the HBV infection rapidly resolved and he converted from HBsAg and eAg positive to HBsAb and eAb positive. No exacerbation of his periarteritis nodosum occurred during the course of his antiviral therapy.


Asunto(s)
2-Aminopurina/análogos & derivados , Antivirales/administración & dosificación , Factor Estimulante de Colonias de Granulocitos y Macrófagos/administración & dosificación , Hepatitis B Crónica/tratamiento farmacológico , Interferón-alfa/administración & dosificación , Poliarteritis Nudosa/complicaciones , 2-Aminopurina/administración & dosificación , ADN Viral/análisis , Quimioterapia Combinada , Famciclovir , Anticuerpos contra la Hepatitis B/análisis , Antígenos de Superficie de la Hepatitis B/análisis , Virus de la Hepatitis B/aislamiento & purificación , Hepatitis B Crónica/complicaciones , Hepatitis B Crónica/virología , Humanos , Interferón alfa-2 , Masculino , Persona de Mediana Edad , Proteínas Recombinantes
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