Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 32
Filtrar
1.
Tumour Biol ; 35(10): 9597-602, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24961351

RESUMO

The Ets-related gene fusions are among the most common molecular alterations in prostate cancer (PCa) and are detected in more than 50 % of PCas. Transmembrane protease serine 2 and Ets-related gene fusion (TMPRSS2-ERG) is the most frequently identified chimeric gene and has been associated with undifferentiated and invasive phenotypes. TMPRSS2-ERG has also been detected in prostate intraepithelial neoplasia (PIN) lesions and more rarely in benign prostatic hyperplasia (BPH) regions mainly in PCa-bearing glands. The possibility that the fusion TMPRSS2-ERG may be present in BPH samples in the absence of apparent PCa was addressed. Out of 115 BPH samples, three were found positive employing RT-PCR. The presence of the fusion gene was confirmed by FISH for these samples, and an additional four samples were found to carry the TMPRSS2-ERG fusion out of 43 tested by the later approach. The presence of the TMPRSS2-ERG fusion did not result in altered expression of 12 putative downstream targets. These findings indicate that TMPRSS2-ERG may or may not lead to PCa development.


Assuntos
Proteínas de Fusão Oncogênica/genética , Hiperplasia Prostática/genética , Humanos , Hibridização in Situ Fluorescente , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase Via Transcriptase Reversa
2.
Br J Cancer ; 108(10): 2142-52, 2013 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-23619925

RESUMO

BACKGROUND: Sox11 is a transcription factor expressed in foetal and neoplastic brain tissue, including gliomas. It has been shown to suppress the tumourigenicity of glioma stem cells in vivo, thereby being hypothesised to function as a tumour suppressor. METHODS: We investigated the expression of Sox11 in 132 diffuse astrocytomas in relation to the regulator cell marker nestin, c-Met and IDH1-R132H, which have shown to be differentially expressed among the molecular subgroups of malignant gliomas, as well as to an inducer of astrocytic differentiation, that is, signal transducer and activator of transcription (p-STAT-3), clinicopathological features and survival. RESULTS: Sox11 immunoreactivity was identified in all tumours irrespective of grade, but being correlated with p-STAT-3. Three out of seven cases showed partial Sox11 promoter methylation. In >50% of our cases neoplastic cells coexpressed Sox11 and nestin, a finding further confirmed in primary glioblastoma cell cultures. Furthermore, nestin, c-Met and IDH1-R132H expression differed among grade categories. Cluster analysis identified four groups of patients according to c-Met, nestin and IDH1-R132H expression. The c-Met/nestin high-expressor group displayed a higher Sox11 expression. Sox11 expression was an indicator of favourable prognosis in glioblastomas, which remained in multivariate analysis and validated in an independent set of 72 cases. The c-Met/nestin high-expressor group was marginally with shorter survival in univariate analysis. CONCLUSIONS: We highlight the importance of Sox11 expression as a favourable prognosticator in glioblastomas. c-Met/nestin/IDH1-R132H expression phenotypes recapitulate the molecular subgroups of malignant glioma.


Assuntos
Astrocitoma/genética , Neoplasias Encefálicas/genética , Proteínas de Filamentos Intermediários/genética , Isocitrato Desidrogenase/genética , Proteínas do Tecido Nervoso/genética , Proteínas Proto-Oncogênicas c-met/genética , Fatores de Transcrição SOXC/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Substituição de Aminoácidos , Arginina/genética , Astrocitoma/diagnóstico , Astrocitoma/metabolismo , Astrocitoma/mortalidade , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Neoplasias Encefálicas/diagnóstico , Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/mortalidade , Estudos de Coortes , Feminino , Regulação Neoplásica da Expressão Gênica , Histidina/genética , Humanos , Proteínas de Filamentos Intermediários/metabolismo , Isocitrato Desidrogenase/metabolismo , Masculino , Pessoa de Meia-Idade , Proteínas do Tecido Nervoso/metabolismo , Nestina , Fenótipo , Fosforilação , Prognóstico , Proteínas Quinases/metabolismo , Proteínas Proto-Oncogênicas c-met/metabolismo , Fatores de Transcrição SOXC/metabolismo , Fator de Transcrição STAT3/metabolismo , Análise de Sobrevida , Células Tumorais Cultivadas , Adulto Jovem
4.
Breast Cancer Res Treat ; 128(2): 447-56, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-21594665

RESUMO

Trastuzumab (T) is effective in metastatic breast cancer (MBC) with HER2 overexpression and/or amplification, but resistance to T develops in a significant number of HER2-positive patients. Understanding the mechanisms of resistance is critical to the care of these patients. Formalin-fixed paraffin-embedded tumor tissue samples were collected from 256 patients with T-treated MBC. Clinical information was collected retrospectively from the patients' medical records. Central review of HER2 status by fluorescent in situ hybridization (FISH) and/or immunohistochemistry (IHC) revealed that of the 227 eligible patients only 139 (61%) were truly HER2-positive. PTEN, ER, PgR, and Ki67 were evaluated by IHC, while PTEN status was evaluated by FISH as well. PIK3CA mutations were identified with single nucleotide polymorphism (SNP) genotyping. Median time to progression (TTP) was 14.4 months for the HER2-positive and 10.3 for the HER2-negative patients (log-rank, P = 0.22). Survival from the initiation of T (survivalT) was 50.4 months for the HER2-positive and 35.3 for the HER2-negative subgroups (P = 0.006). Higher risk of progression was associated with HER2-positive status and the presence of PIK3CA mutations (P = 0.014). PTEN loss, as determined by IHC, was associated with lower survivalT in the whole population (P = 0.029) and in the HER2-positive population (P = 0.017). PIK3CA mutations and/or PTEN loss status were evaluated together as a single parameter, to estimate the impact of activation of the PI3K/AKT molecular pathway, and it was significantly associated with both decreased TTP (P = 0.003 in the total population, P = 0.004 in HER2-positive patients) and survival (survivalT, P = 0.011 in total, P = 0.006 in HER2-positive). In this trastuzumab-treated breast cancer population, PIK3CA activating mutations were associated with shorter TTP and PTEN loss with decreased survival. The activation of the PI3K/AKT pathway from either defect was associated with both TTP and survival, indicating the adverse effect of this pathway's status on trastuzumab efficacy.


Assuntos
Anticorpos Monoclonais/uso terapêutico , Antineoplásicos/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Mutação/genética , PTEN Fosfo-Hidrolase/genética , Fosfatidilinositol 3-Quinases/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Monoclonais Humanizados , Neoplasias Ósseas/tratamento farmacológico , Neoplasias Ósseas/genética , Neoplasias Ósseas/secundário , Neoplasias da Mama/patologia , Classe I de Fosfatidilinositol 3-Quinases , DNA de Neoplasias/genética , Progressão da Doença , Feminino , Seguimentos , Humanos , Técnicas Imunoenzimáticas , Hibridização in Situ Fluorescente , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/secundário , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/secundário , Metástase Linfática , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Polimorfismo de Nucleotídeo Único/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Receptor ErbB-2/genética , Receptor ErbB-2/metabolismo , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo , Estudos Retrospectivos , Taxa de Sobrevida , Fatores de Tempo , Análise Serial de Tecidos , Trastuzumab , Resultado do Tratamento
6.
J Viral Hepat ; 13(5): 303-10, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16637860

RESUMO

Diabetes mellitus has been reported to have an increased prevalence and to be associated with more severe fibrosis in patients with chronic hepatitis C. We evaluated the prevalence of diabetes mellitus in patients with chronic hepatitis B or C as well as the possible association between presence of diabetes and extent of liver fibrosis. In total, 434 consecutive patients with histologically documented hepatitis B e antigen (HBeAg)-negative chronic hepatitis B (n = 174) or chronic hepatitis C (n = 260) were studied. The relationships of diabetes and epidemiological, somatomorphic, laboratory and histological patient characteristics were evaluated. Liver histological lesions were blindly evaluated according to the Ishak's classification. Diabetes was present in 58 (13%) patients, without any difference between those with chronic hepatitis B (14%) or C (13%). Diabetes was observed significantly less frequently in patients with fibrosis score 0-2 (7.7%) than 3-4 (10.4%) than 5-6 (29.2%) (P < 0.001). The presence of diabetes was independently associated with higher gamma-glutamyl-transpeptidase (GGT) levels and more severe fibrosis or presence of cirrhosis (P < 0.001) as well as with presence of hepatic steatosis and increased serum triglycerides levels (P < 0.02). In the noncirrhotic patients, diabetes was significantly associated with older age and higher GGT levels, but not with the extent of fibrosis. In conclusion, diabetes mellitus is observed in more than 10% of patients with either HBeAg-negative chronic hepatitis B or chronic hepatitis C. The presence of diabetes is strongly associated with more severe liver fibrosis, but such an association may be related to the high prevalence of diabetes in patients with cirrhosis.


Assuntos
Diabetes Mellitus/virologia , Hepacivirus/crescimento & desenvolvimento , Vírus da Hepatite B/crescimento & desenvolvimento , Hepatite B Crônica/complicações , Hepatite C Crônica/complicações , Cirrose Hepática/complicações , Alanina Transaminase/sangue , Aspartato Aminotransferases/sangue , Biópsia , Glicemia/análise , Diabetes Mellitus/epidemiologia , Diabetes Mellitus/patologia , Feminino , Antígenos de Superfície da Hepatite B/sangue , Antígenos E da Hepatite B/sangue , Hepatite B Crônica/epidemiologia , Hepatite B Crônica/patologia , Hepatite B Crônica/virologia , Hepatite C Crônica/epidemiologia , Hepatite C Crônica/patologia , Hepatite C Crônica/virologia , Humanos , Cirrose Hepática/epidemiologia , Cirrose Hepática/patologia , Cirrose Hepática/virologia , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Prevalência , Triglicerídeos , gama-Glutamiltransferase/sangue
7.
J BUON ; 11(4): 519-22, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17309187

RESUMO

This is a review of extraosseous Ewing's sarcoma (ES) which includes a new, extremely rare case. The literature was examined with respect to determining the locations of extraosseous ESs, the incidence per site and in total and the criteria which confirm the similarity between extraosseous and osseous ES. ES sites were detected in several organs and tissues, mainly in the trunk, extremities and the retroperitoneal region. Studies confirmed that osseous and extraosseous ES are identical chromosomally and histologically. ES of the small intestine, described here, has not been previously documented in the literature. Along with the other different documented sites, a new location of primary extraosseous ES is also reported here.


Assuntos
Neoplasias Intestinais/patologia , Intestino Delgado/patologia , Tumores Neuroectodérmicos Primitivos/patologia , Sarcoma de Ewing/patologia , Idoso , Procedimentos Cirúrgicos do Sistema Digestório , Humanos , Neoplasias Intestinais/cirurgia , Intestino Delgado/cirurgia , Masculino , Recidiva Local de Neoplasia/cirurgia , Tumores Neuroectodérmicos Primitivos/cirurgia , Sarcoma de Ewing/cirurgia
8.
J Viral Hepat ; 12(6): 635-41, 2005 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-16255765

RESUMO

To evaluate hepatic expression of the nuclear proliferative marker Ki-67 and the p53 oncoprotein in hepatitis B virus (HBV)/HCV cirrhosis in relation to dysplastic liver cell changes and hepatocellular carcinoma (HCC). We studied needle liver biopsies from 107 patients with cirrhosis and no HCC (52 HBV, 55 HCV) who had been assessed for protocol studies, and 57 cirrhotic patients with HCC (40 HBV, 17 HCV). We evaluated small and large cell dysplastic changes along with the expression of Ki-67 and p53 by immunohistochemistry. The labelling index (LI) was defined as the proportion (%) of positive-stained nuclei of the 500 measured. Large and small cell dysplastic changes were observed in 12 and 9% of specimens respectively. Only small cell changes were associated with Ki-67 expression. Ki-67 LI was 5.50 +/- 5.7 in cirrhosis (13.90 +/- 3.84 in those with small cell dysplastic changes vs 4.64 +/- 4.98 in those without, P < 0.01), 10.2 +/- 5.95 in cirrhosis with HCC (P < 0.05) and 18.56 +/- 10 in HCC (P < 0.01). Neither the presence of small cell dysplastic changes nor the expression of Ki-67 was related to severity or aetiology of cirrhosis. Expression of p53 was observed in 30% of the non-tumorous and in 53% of the neoplastic tissue obtained from patients with HCC, with no differences between HCV and HBV. Ki-67 and p53 expression was associated with the tumour grade (P < 0.001). Our observations clearly demonstrate the association between the proliferation activity and the morphological changes in the cirrhotic liver from the non-dysplastic to dysplastic lesion to HCC. They also support the hypothesis that p53 alterations are a rather late event in carcinogenesis and related to HCC grade. And finally, they suggest that the final steps of hepatocarcinogenesis are common and independent of the aetiology of the chronic viral infection.


Assuntos
Carcinoma Hepatocelular/metabolismo , Hepatite B/complicações , Hepatite C/complicações , Antígeno Ki-67/metabolismo , Cirrose Hepática/metabolismo , Neoplasias Hepáticas/metabolismo , Proteína Supressora de Tumor p53/metabolismo , Adulto , Idoso , Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/virologia , Feminino , Hepacivirus , Hepatite B/virologia , Vírus da Hepatite B , Hepatite C/virologia , Humanos , Fígado/metabolismo , Fígado/patologia , Fígado/virologia , Cirrose Hepática/patologia , Cirrose Hepática/virologia , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/virologia , Masculino , Pessoa de Meia-Idade
9.
J Viral Hepat ; 12(2): 199-206, 2005 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15720536

RESUMO

The possible effect of interferon-alpha (IFNa) on liver fibrosis progression has not been adequately studied in chronic hepatitis B. We evaluated 147 patients with HBeAg-negative chronic hepatitis B who had > or =2 liver biopsies and had been treated with IFNa (n = 120) or had remained untreated (n = 27). The median interval between the two biopsies was 24 (12-160) months. All biopsies were scored blindly by a single liver histopathologist according to the classification of Ishak et al. (J Hepatol 1995; 22: 696-699). IFNa induced sustained biochemical response in 30, initial response and subsequent relapse in 57 and no response in 33 patients. Fibrosis improved in 17.5% of treated (sustained responders: 40%, relapsers: 9%, nonresponders: 12%) and 4% of untreated patients and worsened in 34% (sustained responders: 7%, relapsers: 40%, nonresponders: 48%) and 70% of cases, respectively (P = 0.002). The annual rate of fibrosis progression was worse in the untreated (0.427 +/- 0.119) than in treated patients (0.067 +/- 0.052, P = 0.001). However, the fibrosis progression rate in the untreated patients was not significantly different than the net fibrosis progression rate (after subtraction of IFNa duration) in nonresponders or relapsers. In multivariate analysis, worse fibrosis progression rate was associated with older age (P = 0.010), worse baseline grading score (P < 0.001), lower baseline fibrosis (P = 0.035) and the type of response to IFNa (P = 0.032). In conclusion, in HBeAg-negative chronic hepatitis B, IFNa significantly reduces the rate of fibrosis progression, but such an effect is mainly observed in patients with sustained biochemical responses. In relapsers and nonresponders, fibrosis benefit equals the treatment period. The strongest factor associated with fibrosis progression is the change in necroinflammatory activity.


Assuntos
Antígenos E da Hepatite B/análise , Hepatite B Crônica/tratamento farmacológico , Hepatite B Crônica/patologia , Interferon-alfa/uso terapêutico , Cirrose Hepática/patologia , Adulto , Biópsia por Agulha , Estudos de Casos e Controles , Estudos de Coortes , Progressão da Doença , Feminino , Seguimentos , Hepatite B Crônica/mortalidade , Humanos , Imuno-Histoquímica , Interferon alfa-2 , Modelos Lineares , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Probabilidade , Proteínas Recombinantes , Sensibilidade e Especificidade , Índice de Gravidade de Doença , Estatísticas não Paramétricas , Taxa de Sobrevida , Resultado do Tratamento , Carga Viral
10.
Appl Environ Microbiol ; 70(1): 518-26, 2004 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-14711683

RESUMO

We studied the potential inhibitory effect of Lactobacillus casei strain Shirota (from the fermented milk product Yakult [Yakult Ltd., Tokyo, Japan]) on Helicobacter pylori by using (i) in vitro inhibition assays with H. pylori SS1 (Sydney strain 1) and nine H. pylori clinical isolates and (ii) the in vivo H. pylori SS1 mouse model of infection over a period of 9 months. In vitro activity against H. pylori SS1 and all of the clinical isolates was observed in the presence of viable L. casei strain Shirota cells but not in the cell-free culture supernatant, although there was profound inhibition of urease activity. In vivo experiments were performed by oral administration of L. casei strain Shirota in the water supply over a period of 9 months to 6-week-old C57BL/6 mice previously infected with H. pylori SS1 (study group; n = 25). Appropriate control groups of H. pylori-infected but untreated animals (n = 25) and uninfected animals given L. casei strain Shirota (n = 25) also were included in the study. H. pylori colonization and development of gastritis were assessed at 1, 2, 3, 6, and 9 months postinfection. A significant reduction in the levels of H. pylori colonization was observed in the antrum and body mucosa in vivo in the lactobacillus-treated study group, as assessed by viable cultures, compared to the levels in the H. pylori-infected control group. This reduction was accompanied by a significant decline in the associated chronic and active gastric mucosal inflammation observed at each time point throughout the observation period. A trend toward a decrease in the anti-H. pylori immunoglobulin G response was measured in the serum of the animals treated with lactobacillus, although this decrease was not significant.


Assuntos
Infecções por Helicobacter/microbiologia , Helicobacter pylori/efeitos dos fármacos , Helicobacter pylori/crescimento & desenvolvimento , Lacticaseibacillus casei/crescimento & desenvolvimento , Probióticos/farmacologia , Animais , Anticorpos Antibacterianos/sangue , Meios de Cultura , Mucosa Gástrica/microbiologia , Mucosa Gástrica/patologia , Gastrite/microbiologia , Infecções por Helicobacter/patologia , Helicobacter pylori/patogenicidade , Humanos , Camundongos , Camundongos Endogâmicos C57BL
11.
Histol Histopathol ; 18(4): 1181-8, 2003 10.
Artigo em Inglês | MEDLINE | ID: mdl-12973686

RESUMO

Trypsin and its specific inhibitor, TATI (tumour-associated trypsin inhibitor), are expressed in normal human pancreas and in a variety of tumours. The aim of the present study was to assess the parallel expression of trypsin and TATI in colorectal cancer, in comparison with their expression in normal epithelial tissue, since proteases and their inhibitors are thought to be co-expressed in malignant neoplasms. We also assessed the possible significance of their expression as a means of differentiation between normal and malignant tissue. We examined qualitatively and semi-quantitatively the immunohistochemical expression of trypsin and TATI on paraffin-embedded serial tissue sections from 91 colorectal adenocarcinomas. The reverse-transcriptase-polymerase-chain reaction (RT-PCR) was also performed on fresh malignant tissue from 55 of the above adenocarcinomas. Normal and non-malignant tissues adjacent to the tumours were also evaluated. Cytoplasmic expression of trypsin (more than 25% of the cancer cells positive) was found in 67 (73.6%) adenocarcinomas, whereas TATI was expressed in the cytoplasm of 59 (64.8%) cases studied. Statistical analysis using Spearman's test has demonstrated a significant correlation between trypsin and TATI immunohistochemical expression (p<0.01). RT-PCR showed co-expression of trypsin and TATI mRNA in all carcinomas studied. Distinct patterns of trypsin and TATI immunohistochemical expression were observed in adjacent, non-malignant tissues, where both trypsin and TATI mRNA were also detected. Normal tissues were negative by immunohistochemistry. Our results indicate co-expression of trypsin and TATI in colorectal tumours both at the mRNA and protein level. We conclude that in colorectal neoplasms, high levels of trypsin and TATI may be important for malignant tumour formation and/or metastatic process.


Assuntos
Adenocarcinoma/enzimologia , Adenocarcinoma/patologia , Neoplasias Colorretais/enzimologia , Neoplasias Colorretais/patologia , Inibidor da Tripsina Pancreática de Kazal/biossíntese , Tripsina/biossíntese , Adulto , Idoso , Idoso de 80 Anos ou mais , Células Cultivadas , Colo/enzimologia , Feminino , Humanos , Imuno-Histoquímica , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patologia , Isoenzimas/biossíntese , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Inclusão em Parafina , RNA Mensageiro/biossíntese , RNA Neoplásico/biossíntese , Reto/enzimologia , Reação em Cadeia da Polimerase Via Transcriptase Reversa
12.
Acta Gastroenterol Belg ; 66(2): 191-4, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-12891932

RESUMO

The case of a 37-year-old Caucasian female with a history of systemic lupus erythematosus, admitted to hospital due to progressively worsening abdominal pain and arthralgia. During hospitalisation, signs of acute abdomen developed. Laparotomy revealed perforation of the rectum, accompanied by necrosis of the rectosigmoid. Histologic examination revealed vasculitis involving small- and medium-sized vessels. This case report emphasizes the point that colonic and especially rectal involvement from vasculitis, though unusual, may present with profound and possibly life-threatening manifestations and stresses the difficulties in clinical and histological differential diagnosis from other causes of systemic lupus erythematosus-associated abdominal pain.


Assuntos
Colo Sigmoide/irrigação sanguínea , Enteropatias/diagnóstico , Isquemia/etiologia , Lúpus Eritematoso Sistêmico/complicações , Reto/irrigação sanguínea , Adulto , Colo Sigmoide/patologia , Diagnóstico Diferencial , Feminino , Humanos , Necrose , Reto/patologia , Vasculite/diagnóstico , Vasculite/etiologia
13.
Gut ; 52(3): 404-9, 2003 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-12584224

RESUMO

BACKGROUND AND AIMS: Thrombosis of the small intrahepatic veins has been suggested to trigger liver tissue remodelling. We evaluated the prevalence of multiple thrombotic risk factors and their association with the extent of fibrosis in chronic viral hepatitis. METHODS: Ninety consecutive patients with chronic hepatitis B or C without malignancy, a history of venous thrombosis, or antiviral/immunosuppressive therapy within the last six months were included. Thrombophilic and coagulation factors were evaluated on the liver biopsy day. RESULTS: One or more thrombotic risk factors were found in 68% and > or =2 factors in 37% of patients. Higher necroinflammatory activity was independently associated with higher prothrombin time (p=0.003), alanine aminotransferase level (p=0.011), and histological staging (p=0.018). Patients with staging scores of 4-6 compared with those with scores of 0-3 more frequently had deficiency of protein C (24% v 3%; p=0.007), antithrombin III (28% v 5%; p=0.005), and plasminogen (19% v 2%; p=0.03), and a trend for more frequent activated protein C resistance (8% v 0%; p=0.075). The presence of > or =1 significant thrombotic risk factor was observed in 11/25 (44%) patients with staging scores of 4-6 and in 6/65 (9%) patients with scores of 0-3 (p<0.001), being the only variable independently associated with advanced staging (odds ratio 2.4, p=0.02). CONCLUSIONS: Thrombotic risk factors are frequently detected in patients with chronic viral hepatitis and the presence of > or =1 significant factor is associated with more advanced fibrosis. Whether the association of such thrombophilic conditions with advanced fibrosis is a primary or secondary phenomenon and whether their development in combination with local inflammation accelerate the progression of liver fibrosis need further evaluation.


Assuntos
Hepatite B Crônica/complicações , Hepatite C Crônica/complicações , Cirrose Hepática/virologia , Fígado/irrigação sanguínea , Trombose Venosa/virologia , Adulto , Fatores Etários , Idoso , Inibidores dos Fatores de Coagulação Sanguínea/sangue , Fatores de Coagulação Sanguínea/metabolismo , Progressão da Doença , Feminino , Humanos , Cirrose Hepática/patologia , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Fatores de Risco
14.
Eur J Clin Invest ; 32(4): 265-73, 2002 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11952812

RESUMO

BACKGROUND: Non specific esterases (NSE) are a group of cellular carboxylesterases, enzyme markers of monocytes/macrophages, whose tissue distribution in the human body and changes in various disease states have not been adequately studied. We investigate the presence and localization of NSE, in the normal and inflamed human colonic mucosa. DESIGN: NSE were studied histochemically and biochemically using alpha-naphthyl acetate as the substrate, in the colonic mucosa from 67 patients with colitis of various aetiologies and 10 normal controls. In addition, esterase activity was studied biochemically in serum from colitic patients and normal controls. RESULTS: Histochemical study of the colonic tissue demonstrated that NSE were localised in the epithelial brush border, the goblet cells of the glands and a macrophage population of the lamina propria in the colonic mucosa of normal controls and patients with non specific colitis. In active ulcerative colitis, esterase depletion and esterase negative macrophages were identified in parallel with goblet cell disappearance. Gradual reappearance of esterase activity was found after successful treatment. Biochemical study of NSE activity showed that serum and colonic tissue esterase levels were greatly (P < 0.001) reduced in active ulcerative colitis compared to the normal controls or non specific colitis patients and they were increased after successful treatment. Despite this increase, the esterase activity in the colonic tissue from ulcerative colitis patients after treatment was significantly reduced compared to the normal controls. Interestingly, the enzyme levels from non-inflamed areas of the bowel of patients with ulcerative colitis were also significantly (P < 0.01) decreased compared to the normal controls. CONCLUSIONS: These data suggest that esterase reduction in ulcerative colitis is not a simple result of the inflammatory process but rather it precedes its development. This enzyme depletion might have an important pathogenetic implication in the inflammatory process.


Assuntos
Colite Ulcerativa/enzimologia , Colo/enzimologia , Esterases/análise , Mucosa Intestinal/enzimologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Histocitoquímica , Humanos , Imuno-Histoquímica , Masculino , Pessoa de Meia-Idade , Distribuição Tecidual
15.
Histol Histopathol ; 17(1): 131-8, 2002 01.
Artigo em Inglês | MEDLINE | ID: mdl-11813863

RESUMO

Activation of telomerase, present in the vast majority of all human cancers, is associated with elongation of chromosomal telomeres and consequent cell immortalization. Telomere length homeostasis is a dynamic process governed by the negative feedback mechanism of the telomeric repeat binding factor 1 (TRF1) which inhibits the action of telomerase in telomerase-positive cells. In an attempt to investigate markers of tumour growth as possible prognostic indicators in laryngeal cancer, we studied the expression of TRF1 and of the proliferation marker Ki67 on 96 invasive squamous carcinomas of the larynx. A standard three step immunoperoxidase staining method was applied on paraffin sections incubated with appropriate polyclonal antibodies. The percentages of Ki67- and TRF1-immunopositive cancerous cells were calculated by image analysis. Univariate and multivariate statistical analysis of the staining results were performed in order to detect any association of the examined immunomarkers with the tumours' classical clinicopathological variables including nuclear morphometric features as well as with patients' disease-free survival. Ki67 immunostaining was positively linked with advanced patients' age, nodal involvement as well as presence of early recurrence. No relation was found between proliferative fraction and TRF1 immunoexpression. TRF1 was expressed in 55.2% of all cases and was positively linked only to tumour size. Multivariate statistical analysis revealed the presence of lymph nodal metastasis and Ki67 immunopositivity index > or = 20% as significant predictors of relapse. Increased Ki67 immunostaining appears to be a promising marker of tumour aggressiveness in laryngeal cancer. After one point at the tumour's natural history, the maintenance of tumour growth does not seem to depend on cell proliferation but on TRF1 immunoexpression. Whether the latter can be used for the identification of immortalized cells in every-day practice is worth investigating.


Assuntos
Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/patologia , Proteínas de Ligação a DNA/metabolismo , Neoplasias Laríngeas/metabolismo , Neoplasias Laríngeas/patologia , Adolescente , Adulto , Idoso , Criança , Feminino , Humanos , Imuno-Histoquímica , Antígeno Ki-67/biossíntese , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Inclusão em Parafina , Valor Preditivo dos Testes , Prognóstico , Sobrevida , Telômero/metabolismo , Proteína 1 de Ligação a Repetições Teloméricas , Fixação de Tecidos
17.
Scand J Gastroenterol ; 36(9): 971-4, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11521989

RESUMO

BACKGROUND: The role of antibiotics in the treatment of ulcerative colitis is controversial. This study aims at assessing the therapeutic role of ciprofloxacin as an adjunct to corticosteroids in acute severe ulcerative colitis. METHODS: In this prospective, randomized, double-blind, placebo-controlled trial, 55 consecutive patients fulfilling the criteria of Truelove and Witts for severe ulcerative colitis were randomized on admission to the hospital to receive intravenously ciprofloxacin (400 mg b.i.d.) (n = 29) or placebo (n = 27). All patients received parenteral nutrition, intravenous hydrocortisone (100 mg q.i.d.) and hydrocortisone enemas (100 mg b.i.d.). Patients were assessed after 10 days of continuous treatment, or at any time a severe complication occurred. RESULTS: At study entry, there were no significant differences between treatment groups in any patient or disease-related parameter. Twenty-three of 29 patients (79.3%) treated with ciprofloxacin and 20 of 26 patients (77%) treated with placebo showed substantial improvement and were given oral steroids (P > 0.1). Six patients in each group did not improve (n = 10) or developed complications (n = 2). Nine of these 12 patients underwent emergency colectomy; three patients consented to receive intravenous cyclosporin but did not achieve remission of colitis and they underwent elective colectomy. There were no perioperative or late deaths. CONCLUSIONS: A short course of intravenous ciprofloxacin does not seem to augment the effect of corticosteroids for patients with acute, severe ulcerative colitis.


Assuntos
Anti-Infecciosos/uso terapêutico , Anti-Inflamatórios/uso terapêutico , Ciprofloxacina/uso terapêutico , Colite Ulcerativa/tratamento farmacológico , Hidrocortisona/uso terapêutico , Doença Aguda , Adulto , Anti-Infecciosos/administração & dosagem , Anti-Inflamatórios/administração & dosagem , Ciprofloxacina/administração & dosagem , Método Duplo-Cego , Quimioterapia Combinada , Feminino , Humanos , Hidrocortisona/administração & dosagem , Masculino , Nutrição Parenteral , Estudos Prospectivos
18.
J Clin Oncol ; 19(3): 676-81, 2001 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-11157017

RESUMO

PURPOSE: The aim of this study was to investigate the existence of any thermal difference between malignant tumors and inflammatory benign lesions of the human urinary bladder and to determine whether it correlates with tumor angiogenesis quantification. PATIENTS AND METHODS: A new method, developed in our institute, is introduced to detect temperature in human urinary bladder, in vivo. This method is based on a thermography catheter. We calculated the differences of the temperature of the solid tumor and of a normal area (Delta T) on 20 subjects (mean age, 72.5 years; 95% confidence interval [CI], 68.5 to 76.4). According to the biopsy histology, Eight (40%) patients had benign tumors, and 12 (60%) had malignant tumors. RESULTS: We found significant differences of Delta T between patients with benign and malignant tumor (P <.001). Also, differences were found for the mean values of angiogenesis level between malignant and benign tumors (P =.0261), and a moderated positive correlation was estimated between the degree of angiogenesis and Delta T (P =.02). Based on logistic regression analysis, we found that a 1-degree increase of Delta T triples the odds of a patient having a malignant tumor (odds ratio = 2.91; 95% CI, 1.97 to 7.78; P <.001), adjusted for the degree of angiogenesis (P =.0236) and the grade of tumor (P <.001). A threshold point of Delta T = 0.7 degrees C was determined, with sensitivity 83% and specificity 75%. CONCLUSION: These findings suggest that the calculated difference of temperature between normal tissue and neoplastic area could be a useful criterion in the diagnosis of malignancy in tumors of the human urinary bladder.


Assuntos
Termômetros , Neoplasias da Bexiga Urinária/diagnóstico , Neoplasias da Bexiga Urinária/fisiopatologia , Cateterismo Urinário , Idoso , Análise de Variância , Estudos de Casos e Controles , Cistite/diagnóstico , Cistite/fisiopatologia , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Temperatura , Bexiga Urinária/irrigação sanguínea , Neoplasias da Bexiga Urinária/irrigação sanguínea , Cateterismo Urinário/instrumentação , Cateterismo Urinário/métodos
19.
J Viral Hepat ; 7(3): 235-40, 2000 May.
Artigo em Inglês | MEDLINE | ID: mdl-10849267

RESUMO

The treatment of HBeAg-negative chronic hepatitis B with alpha interferon alone is unsatisfactory. We evaluated the efficacy of combined administration of interferon-a2a (IFN) with oral ganciclovir, a nucleoside analogue. Forty patients with hepatitis B virus (HBV)-DNA-positive/HBeAg-negative chronic hepatitis B, were randomized to receive 4.5 MU IFN thrice weekly, subcutaneously, alone or in combination with 3 g ganciclovir per os daily for 26 weeks and followed for 12 months after treatment. Mean serum HBV-DNA levels decreased by 4.0 log10 in the combination group (from 5 x 106 to 4.8 x 102 copies/ml) and by 2.2 log10 in the interferon group (from 8 x 106 to 4.8 x 104 copies/ml) by quantitative polymerase chain reaction (PCR). HBV-DNA became undetectable in 11 of 20 (55%) and in three of 20 (15%) patients in the two groups, respectively (P=0.02). The alanine aminotransferase levels became normal in all patients receiving combination therapy, compared to 75% of those in the interferon group. After cessation of therapy, HBV-DNA increased or reappeared in all patients with 85% also relapsing biochemically. One year after treatment, three patients in each group (15%) remained in sustained biochemical remission with very low serum HBV-DNA levels (median 15 700 copies/ml). We conclude that, in HBeAg-negative chronic hepatitis B, 6-month combination therapy with oral ganciclovir and IFN is associated with complete biochemical remission in all treated patients and a 4 log10 decrease in serum HBV-DNA levels. The end of treatment efficacy of this combination scheme is far super- ior to that of IFN monotherapy but sustained responses are few. Further studies are warranted to evaluate the efficacy of prolonged combination schemes with nucleoside analogues and IFN, compared to IFN monotherapy.


Assuntos
Antivirais/uso terapêutico , Ganciclovir/uso terapêutico , Vírus da Hepatite B/isolamento & purificação , Hepatite B Crônica/tratamento farmacológico , Interferons/uso terapêutico , Administração Oral , Alanina Transaminase/sangue , Quimioterapia Combinada , Feminino , Seguimentos , Antígenos E da Hepatite B/sangue , Vírus da Hepatite B/genética , Hepatite B Crônica/sangue , Hepatite B Crônica/virologia , Humanos , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Resultado do Tratamento , Carga Viral
20.
Urology ; 55(3): 436, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10754174

RESUMO

Tumors of the spermatic cord are very rare, and approximately one half of all primary spermatic cord tumors are malignant. We report the presentation and treatment of an adult (36-year-old) patient with a mixed germ cell tumor that originated in the spermatic cord. No similar cases of mixed tumors of the spermatic cord in adults have been reported.


Assuntos
Neoplasias dos Genitais Masculinos/diagnóstico , Germinoma/diagnóstico , Cordão Espermático , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biópsia por Agulha , Bleomicina/administração & dosagem , Quimioterapia Adjuvante , Cisplatino/administração & dosagem , Etoposídeo/administração & dosagem , Neoplasias dos Genitais Masculinos/terapia , Germinoma/secundário , Germinoma/terapia , Humanos , Metástase Linfática , Masculino , Radioterapia Adjuvante
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...