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1.
Artigo em Inglês | MEDLINE | ID: mdl-39008948

RESUMO

OBJECTIVE: Data on the long-term outcome of patients with childhood-onset Systemic Lupus Erythematosus (cSLE) are scarce. Aims of this study were to describe the long-term outcomes of cSLE and to identify factors associated with the development of damage and persistent disease activity. METHODS: We conducted a retrospective multicentre study using data from the PEDIALUP registry of the Juvenile Inflammatory Rheumatism (JIR) cohort database. Demographic characteristics, clinical manifestations, laboratory, radiological, histological and treatment data were collected from medical records during follow-up. RESULTS: A total of 138 patients with cSLE, diagnosed between 1971 and 2015, were included. With a median follow-up of 15.4 [9.6-22.4] years, 51% of patients had a SLICC-Damage Index score ≥ 1 at last follow-up with the musculoskeletal, cutaneous, renal, neurological, and cardiovascular damage being the most common manifestations. The proportion of patients with a SLICC-DI score ≥ 1 increased significantly with the duration of the follow-up (p< 0.001). On multivariate analysis, duration of follow-up was associated with increased risk of cumulative damage (OR 1.08, 95% CI 1.01, 1.15, p= 0.035). At the last visit, 34% of patients still had active disease with a SLEDAI score of ≥ 6. On multivariate analysis, Sub-Saharan African ethnicity was associated with 7-fold increased odds of having active disease at the last visit compared with Caucasians (OR 7.44, 95% CI 2.24, 24.74, p= 0.0002). CONCLUSION: The prevalence of damage remains high in patients with cSLE even when the diagnosis of c-SLE has been made in the recent decades.

2.
Diabet Med ; 33(7): 985-91, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-26937608

RESUMO

AIMS: To test the hypothesis that soluble cellular adhesion molecules would be positively and independently associated with risk of diabetes. METHODS: Soluble levels of six cellular adhesion molecules (ICAM-1, E-selectin, VCAM-1, E-cadherin, L-selectin and P-selectin) were measured in participants in the Multi-Ethnic Study of Atherosclerosis, a prospective cohort study. Participants were then followed for up to 10 years to ascertain incident diabetes. RESULTS: Sample sizes ranged from 826 to 2185. After adjusting for age, sex, race/ethnicity, BMI and fasting glucose or HbA1c , four cellular adhesion molecules (ICAM-1, E-selectin, VCAM-1 and E-cadherin) were positively associated with incident diabetes and there was a statistically significant trend across quartiles. Comparing the incidence of diabetes in the highest and lowest quartiles of each cellular adhesion molecule, the magnitude of association was largest for E-selectin (hazard ratio 2.49; 95% CI 1.26-4.93) and ICAM-1 (hazard ratio 1.76; 95% CI 1.22-2.55) in fully adjusted models. Tests of effect modification by racial/ethnic group and sex were not statistically significant for any of the cellular adhesion molecules (P > 0.05). CONCLUSIONS: The finding of significant associations between multiple cellular adhesion molecules and incident diabetes may lend further support to the hypothesis that microvascular endothelial dysfunction contributes to risk of diabetes.


Assuntos
Caderinas/sangue , Diabetes Mellitus Tipo 2/epidemiologia , Selectina E/sangue , Molécula 1 de Adesão Intercelular/sangue , Selectina L/sangue , Selectina-P/sangue , Molécula 1 de Adesão de Célula Vascular/sangue , Antígenos CD , Estudos de Coortes , Diabetes Mellitus Tipo 2/sangue , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Estudos Prospectivos , Risco , Estados Unidos/epidemiologia
4.
Ann Oncol ; 25(5): 1039-44, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24562448

RESUMO

BACKGROUND: Preoperative chemoradiotherapy (CRT) improves outcomes in patients with locally advanced but resectable adenocarcinoma of the esophagus. ACOSOG Z4051 evaluated CRT with docetaxel, cisplatin, and panitumumab (DCP) in this patient group with a primary end point of a pathologic complete response (pCR) ≥35%. PATIENTS AND METHODS: From 15 January 2009 to 22 July 2011, 70 patients with locally advanced but resectable distal esophageal adenocarcinoma were enrolled. Patients received docetaxel (40 mg/m(2)), cisplatin (40 mg/m(2)), and panitumumab (6 mg/kg) on weeks 1, 3, 5, 7, and 9 with RT (5040 cGy, 180 cGy/day × 28 days) beginning week 5. Resection was planned after completing CRT. PCR was defined as no viable residual tumor cells. Secondary objectives included near-pCR (≤10% viable cancer cells), toxicity, and overall and disease-free survival. Adverse events were graded using the CTCAE Version 3.0. RESULTS: Five of 70 patients were ineligible. Of 65 eligible patients (59 M; median age 61), 11 did not undergo surgery, leaving 54 assessable. PCR rate was 33.3% and near-pCR was 20.4%. Secenty-three percent of patients completed DCP (n = 70) and 92% completed RT. 48.5% had toxicity ≥grade 4. Lymphopenia (43%) was most common. Operative mortality was 3.7%. Adult respiratory distress syndrome was encountered in two patients (3.7%). At median follow-up of 26.3 months, median overall survival was 19.4 months and 3-year overall survival was 38.6% (95% confidence interval 24.5% to 60.8%). CONCLUSIONS: Neoadjuvant CRT with DCP is active (pCR + near-pCR = 53.7%) but toxicity is significant. Further evaluation of this regimen in an unselected population is not recommended. CLINICALTRIALSGOV IDENTIFIER: NCT00757172.


Assuntos
Adenocarcinoma/terapia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Esofágicas/terapia , Junção Esofagogástrica/patologia , Adenocarcinoma/mortalidade , Adulto , Idoso , Anticorpos Monoclonais/administração & dosagem , Quimiorradioterapia Adjuvante , Cisplatino/administração & dosagem , Intervalo Livre de Doença , Docetaxel , Neoplasias Esofágicas/mortalidade , Junção Esofagogástrica/cirurgia , Feminino , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante , Panitumumabe , Taxoides/administração & dosagem , Resultado do Tratamento
5.
Br J Psychiatry ; 200(1): 22-9, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22075649

RESUMO

BACKGROUND: Young people with self-experienced cognitive thought and perception deficits (basic symptoms) may present with an early initial prodromal state (EIPS) of psychosis in which most of the disability and neurobiological deficits of schizophrenia have not yet occurred. AIMS: To investigate the effects of an integrated psychological intervention (IPI), combining individual cognitive-behavioural therapy, group skills training, cognitive remediation and multifamily psychoeducation, on the prevention of psychosis in the EIPS. METHOD: A randomised controlled, multicentre, parallel group trial of 12 months of IPI v. supportive counselling (trial registration number: NCT00204087). Primary outcome was progression to psychosis at 12- and 24-month follow-up. RESULTS: A total of 128 help-seeking out-patients in an EIPS were randomised. Integrated psychological intervention was superior to supportive counselling in preventing progression to psychosis at 12-month follow-up (3.2% v. 16.9%; P = 0.008) and at 24-month follow-up (6.3% v. 20.0%; P = 0.019). CONCLUSIONS: Integrated psychological intervention appears effective in delaying the onset of psychosis over a 24-month time period in people in an EIPS.


Assuntos
Terapia Cognitivo-Comportamental/métodos , Progressão da Doença , Educação de Pacientes como Assunto , Transtornos Psicóticos/prevenção & controle , Esquizofrenia/prevenção & controle , Psicologia do Esquizofrênico , Adolescente , Adulto , Assistência Ambulatorial , Aconselhamento , Suscetibilidade a Doenças/psicologia , Saúde da Família , Feminino , Humanos , Estimativa de Kaplan-Meier , Masculino , Estudos Prospectivos , Escalas de Graduação Psiquiátrica , Transtornos Psicóticos/patologia , Transtornos Psicóticos/psicologia , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
6.
Autoimmun Rev ; 21(3): 103013, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34896652

RESUMO

Anti-Ro52 (or anti-TRIM21) antibodies are part of the family of anti-Ro/SSA antibodies, historically markers of Sjögren syndrome and systemic lupus erythematosus. Anti-Ro52 antibodies represent one the most frequently encountered autoantibodies in patients with connective tissue disease (primary Sjögren syndrome, systemic lupus erythematosus, systemic sclerosis and idiopathic inflammatory myopathies). Because of their lack of specificity and detection in patients with non-autoimmune disorders, the usefulness of anti-Ro52 testing in connective tissue diseases is still matter of debate among clinicians and immunologists. Autoantibodies are mainly diagnostic markers for autoimmune diseases but some of them can also be directly involved in the generation of tissue damage. Over the past decade several authors reported associations of anti-Ro52 antibodies with some clinical features - especially interstitial lung disease - and survival in patients with connective tissue diseases. There is also a growing evidence of the role of anti-Ro52 antibodies in the pathogenesis of connective tissue diseases. In this review, we comprehensively discuss the clinical associations of anti-Ro52 antibodies in the different connective tissue diseases and the recent advances on their potential role in the inflammatory response.


Assuntos
Doenças Autoimunes , Doenças do Tecido Conjuntivo , Síndrome de Sjogren , Autoanticorpos , Doenças Autoimunes/diagnóstico , Doenças do Tecido Conjuntivo/diagnóstico , Humanos , Ribonucleoproteínas
7.
Ann Oncol ; 22(2): 348-54, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-20670978

RESUMO

BACKGROUND: The American College of Surgeons Oncology Group sought to confirm the efficacy of a novel interferon-based chemoradiation regimen in a multicenter phase II trial. PATIENTS AND METHODS: Patients with resected (R0/R1) adenocarcinoma of the pancreatic head were treated with adjuvant interferon-alfa-2b (3 million units s.c. on days 1, 3, and 5 of each week for 5.5 weeks), cisplatin (30 mg/m(2) i.v. weekly for 6 weeks), and continuous infusion 5-fluorouracil (5-FU; 175 mg·m(2)/day for 38 days) concurrently with external-beam radiation (50.4 Gy). Chemoradiation was followed by two 6-week courses of continuous infusion 5-FU (200 mg·m(2)/day). The primary study end point was 18-month overall survival from protocol enrollment (OS18); an OS18 ≥65% was considered a positive study outcome. RESULTS: Eighty-nine patients were enrolled. Eighty-four patients were assessable for toxicity. The all-cause grade ≥3 toxicity rate was 95% (80 patients) during therapy. No long-term toxicity or toxicity-related deaths were noted. At 36-month median follow-up, the OS18 was 69% [95% confidence interval (CI) 60% to 80%]; the median disease-free survival and overall survival were 14.1 months (95% CI 11.0-20.1 months) and 25.4 months (95% CI 23.4-34.1 months), respectively. CONCLUSIONS: Notwithstanding promising multi-institutional efficacy results, further development of this regimen will require additional modifications to mitigate toxic effects.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Pancreáticas/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Quimioterapia Adjuvante , Cisplatino/administração & dosagem , Terapia Combinada , Feminino , Fluoruracila/administração & dosagem , Humanos , Interferon alfa-2 , Interferon-alfa/administração & dosagem , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/radioterapia , Neoplasias Pancreáticas/cirurgia , Proteínas Recombinantes , Análise de Sobrevida
8.
J Neurooncol ; 104(1): 253-9, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21153680

RESUMO

Glioblastomas (GBM) may originate de novo (primary), or following transformation from a lower grade glioma (secondary), and it has been postulated that these tumors may have different biological behaviors. We performed a correlative analysis involving 204 patients with glioma treated prospectively on NCCTG clinical trials. Central pathology review of tumor tissues taken at the time of initial diagnosis and at recurrence were performed in all patients. Tumors progressed from low (WHO grade 2) to high (grade 3-4) at recurrence in 45% low grade oligodendroglioma patients, in 70% with low grade oligoastrocytoma, and 74% with low grade astrocytoma (P = 0.031). Median overall survival (OS) from initial diagnosis varied by histology: oligodendroglioma, 8.8 years; (95% CI 5.7-10.2); oligoastrocytoma, 4.4 years (95% CI 3.5-5.6); astrocytoma grade 2 3.1 years (astrocytoma grade 2-4, 2.1 years) (95% CI 1.7-2.5, P < 0.001). Mean time to recurrence (TTR) also varied between patients with de novo GBM, those secondary GBM, and those that remained non-GBM at recurrence (1.1 ± 1.1 vs. 2.9 ± 1.8 vs. 4.0 ± 2.9 years, respectively, P < 0.001). Median OS from time of recurrence also varied between these three categories (0.7 years, 95% CI: 0.5-1.1 vs. 0.6 years, CI: 0.5-1.0 vs. 1.4 years, 95% CI: 1.1-2.0, respectively) (P < 0.001). At time of relapse, transformation to higher grade is frequent in low grade pure and mixed astrocytomas, but is observed in less than half of those with low grade oligodendroglioma. From time of recurrence, OS was not significantly different for those with primary versus secondary GBM, and it may thus be reasonable include patients with secondary GBM in clinical therapeutic trials for recurrent disease.


Assuntos
Ensaios Clínicos como Assunto/estatística & dados numéricos , Bases de Dados como Assunto , Glioblastoma/patologia , Glioma/secundário , Glioma/terapia , Estatística como Assunto , Feminino , Glioblastoma/mortalidade , Glioblastoma/terapia , Glioma/diagnóstico , Glioma/mortalidade , Humanos , Masculino , Estudos Prospectivos , Análise de Sobrevida , Resultado do Tratamento
9.
Eur Respir J ; 33(6): 1361-6, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19129275

RESUMO

Quantification of haemosiderin-laden macrophages in bronchoalveolar lavage fluid (BALF) has been used to diagnose diffuse alveolar haemorrhage (DAH) but has not been assessed in patients with diffuse alveolar damage (DAD). The present study analysed BALF obtained from 21 patients with DAD diagnosed by surgical lung biopsy. The median age of 21 patients with DAD was 68 yrs (range 18-79 yrs); 14 (67%) were male and 12 (57%) were immunocompromised. The median proportion of haemosiderin-laden macrophages in BALF was 5% (range 0-90%), but was >or=20% in seven (33%) patients, fulfilling the commonly used BALF criterion for DAH. There was a trend toward a positive correlation between the percentage of haemosiderin-laden macrophages in BALF and parenchymal haemorrhage assessed semiquantitatively by histopathological analysis. Patients with >or=20% haemosiderin-laden macrophages in BALF showed a significantly increased mortality rate (p = 0.047) compared to those with <20%. In patients with an acute onset of diffuse lung infiltrates and respiratory distress, >or=20% haemosiderin-laden macrophages in BALF can occur with DAD, and is not necessarily diagnostic of DAH. The finding of >or=20% haemosiderin-laden macrophages in BALF is associated with a worse prognosis in patients with DAD.


Assuntos
Líquido da Lavagem Broncoalveolar/química , Hemorragia/patologia , Hemossiderina/metabolismo , Macrófagos Alveolares/química , Alvéolos Pulmonares/patologia , Adolescente , Adulto , Idoso , Biomarcadores/metabolismo , Broncoscopia , Feminino , Humanos , Fibrose Pulmonar Idiopática , Hospedeiro Imunocomprometido , Masculino , Pessoa de Meia-Idade , Prognóstico
10.
Schizophr Res ; 102(1-3): 150-62, 2008 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-18439804

RESUMO

Forty Untreated high-risk (HR) individuals for psychosis and 75 healthy control subjects (HC) matched for age, gender, handedness and educational level were investigated by structural MRI. HR subjects were recruited at the Early Detection and Intervention Centre for Mental Crises (FETZ) of the Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-University, Germany. Measurements of gray matter volumes were performed by voxel-based morphometry using SPM5. The sample of HR subjects showed GM volume reductions in frontal, lateral temporal and medial temporal regions compared to the healthy control group. These regions are compatible with structural findings in the clinically apparent disease of schizophrenia.


Assuntos
Encéfalo/patologia , Imageamento por Ressonância Magnética/estatística & dados numéricos , Esquizofrenia/patologia , Adulto , Atrofia , Encéfalo/crescimento & desenvolvimento , Grupos Controle , Estudos Transversais , Feminino , Seguimentos , Lobo Frontal/patologia , Humanos , Processamento de Imagem Assistida por Computador , Masculino , Doenças Neurodegenerativas/diagnóstico , Doenças Neurodegenerativas/patologia , Fatores de Risco , Esquizofrenia/diagnóstico , Lobo Temporal/patologia
11.
Rev Med Interne ; 39(2): 127-129, 2018 Feb.
Artigo em Francês | MEDLINE | ID: mdl-29288001

RESUMO

INTRODUCTION: Arterial and venous thromboses occur in almost one in five patients with POEMS syndrome and usually in macrocirculation. CASE REPORT: We report a 67-year-old male with a POEMS syndrome who presented initially with a blue toe syndrome. He complained of Raynaud's syndrome and left foot paresthesia. Physical examination showed gynecomastia, lymphadenopathies and skin lesions. Cardiovascular investigations excluded atrial fibrillation, unstable atherosclerotic lesions and vascular calcifications. Imaging studies showed diffuse osteosclerotic lesions. Monoclonal protein with lambda light chain was discovered and serum level of VEGF was increased at 2900pg/ml. CONCLUSION: This is to our knowledge the first case of thrombotic microangiopathy in POEMS syndrome without embolic cause or calciphylaxis.


Assuntos
Síndrome do Artelho Azul/etiologia , Síndrome POEMS/complicações , Idoso , Antineoplásicos Alquilantes/uso terapêutico , Síndrome do Artelho Azul/diagnóstico , Síndrome do Artelho Azul/tratamento farmacológico , Dexametasona/uso terapêutico , Glucocorticoides/uso terapêutico , Humanos , Masculino , Melfalan/uso terapêutico , Síndrome POEMS/diagnóstico , Síndrome POEMS/tratamento farmacológico , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Fator A de Crescimento do Endotélio Vascular/sangue
12.
Chirurg ; 78(9): 828-32, 2007 Sep.
Artigo em Alemão | MEDLINE | ID: mdl-17565476

RESUMO

BACKGROUND: The purpose of this study was to evaluate the applicability of a port stapling device to simplify and improve port implantation in laparoscopic adjustable gastric banding (LAGB). METHODS: From November 2005 to September 2006, a prospective study was conducted on 23 consecutive patients who underwent LAGB with Swedish adjustable gastric banding. Patients were randomized to either conventional titanium-port implantation or port stapling using the "Velocity" device. RESULTS: No differences in age, body weight, body mass index, fascia depth or incision length were reported between the groups. Port implantation time was significantly less using port stapling (90+/-24 s) compared to conventional port implantation (521+/-138 s). Port related complaints postoperatively and at follow-up were equal in both groups. CONCLUSIONS: Port stapling is an excellent tool to facilitate port implantation, particularly in massively obese patients with a thick abdominal wall.


Assuntos
Gastroplastia/instrumentação , Gastroplastia/métodos , Laparoscopia , Obesidade Mórbida/cirurgia , Adulto , Índice de Massa Corporal , Peso Corporal , Distribuição de Qui-Quadrado , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Implantação de Prótese , Grampeadores Cirúrgicos , Fatores de Tempo , Titânio , Resultado do Tratamento
13.
J Natl Cancer Inst ; 91(4): 332-9, 1999 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-10050866

RESUMO

BACKGROUND: Conventional cytologic analysis of sputum is an insensitive test for the diagnosis of non-small-cell lung cancer (NSCLC). We have recently demonstrated that polymerase chain reaction (PCR)-based molecular methods are more sensitive than cytologic analysis in diagnosing bladder cancer. In this study, we examined whether molecular assays could identify cancer cells in bronchoalveolar lavage (BAL) fluid. METHODS: Tumor-specific oncogene mutations, CpG-island methylation status, and microsatellite alterations in the DNA of cells in BAL fluid from 50 consecutive patients with resectable (stages I through IIIa) NSCLC were assessed by use of four PCR-based techniques. RESULTS: Of 50 tumors, 28 contained a p53 mutation, and the identical mutation was detected with a plaque hybridization assay in the BAL fluid of 39% (11 of 28) of the corresponding patients. Eight of 19 adenocarcinomas contained a K-ras mutation, and the identical mutation was detected with a mutation ligation assay in the BAL fluid of 50% (four of eight) of the corresponding patients. The p16 gene was methylated in 19 of 50 tumors, and methylated p16 alleles were detected in the BAL fluid of 63% (12 of 19) of the corresponding patients. Microsatellite instability in at least one marker was detected with a panel of 15 markers frequently altered in NSCLC in 23 of 50 tumors; the identical alteration was detected in the BAL fluid of 14% (three of 22) of the corresponding patients. When all four techniques were used, mutations or microsatellite instability was detected in the paired BAL fluid of 23 (53%) of the 43 patients with tumors carrying a genetic alteration. CONCLUSION: Although still limited by sensitivity, molecular diagnostic strategies can detect the presence of neoplastic cells in the proximal airway of patients with surgically resectable NSCLC.


Assuntos
Líquido da Lavagem Broncoalveolar , Carcinoma Pulmonar de Células não Pequenas/diagnóstico , Carcinoma Pulmonar de Células não Pequenas/genética , Ilhas de CpG , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/genética , Repetições de Microssatélites/genética , Mutação , Oncogenes/genética , Alelos , Líquido da Lavagem Broncoalveolar/citologia , Carcinoma Pulmonar de Células não Pequenas/patologia , Inibidor p16 de Quinase Dependente de Ciclina/metabolismo , Primers do DNA , Genes ras/genética , Humanos , Hibridização In Situ , Neoplasias Pulmonares/patologia , Metilação , Estadiamento de Neoplasias , Reação em Cadeia da Polimerase/métodos , Estudos Prospectivos , Sensibilidade e Especificidade , Proteína Supressora de Tumor p53/genética
14.
Cancer Res ; 60(9): 2488-91, 2000 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-10811129

RESUMO

Microsatellite alterations are useful clonal markers for the early detection of cancer. An increase in microsatellite instability has been observed at certain tetranucleotide repeat markers (AAAGn) in lung, head and neck, and bladder cancer. However, the genetic mechanism underlying these elevated microsatellite alterations at selected tetranucleotide repeat (EMAST) tumors is still unknown. The p53 gene plays an important role in maintaining genome integrity by repairing damaged DNA. Therefore, we tested 88 non-small cell lung cancers with a panel of 13 microsatellite markers previously shown to exhibit frequent instability and also performed p53 sequence analysis in these tumors. Thirty-one of these 88 cancers (35%) demonstrated a novel allele [EMAST(+)] in > or =1 of these 13 microsatellite markers. p53 mutations were detected in 50 of 88 (57%) cancers and were significantly (P = 0.001) more common in EMAST(+) tumors (25 of 31; 81%) than in EMAST(-) tumors (25 of 57; 44%). Among squamous cell cancers, p53 mutations were detected significantly (P = 0.04) more frequently in EMAST(+) tumors (17 of 19; 89%) than in EMAST(-) tumors (10 of 18; 55%). Similarly, among primary adenocarcinomas, p53 mutations were present in 67% of the EMAST(+) tumors and in 35% of EMAST(-) adenocarcinomas. None of the 31 EMAST(+) tumors demonstrated high frequency microsatellite instability when examined with a reference panel of five mono- and dinucleotide markers. Primary lung cancers with microsatellite alterations at selected tetranucleotide repeats have a high frequency of p53 mutations and do not display a phenotype consistent with defects in mismatch repair.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/genética , Genes p53 , Neoplasias Pulmonares/genética , Repetições de Microssatélites/genética , Mutação , Adenocarcinoma/genética , Análise Mutacional de DNA , Humanos , Neoplasias de Células Escamosas/genética
15.
Cancer Res ; 61(5): 2092-6, 2001 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-11280771

RESUMO

Epidemiological studies have demonstrated a causal association between tobacco use and carcinoma of the lung, and some genetic targets of the carcinogens in cigarette smoke have been defined recently. We further examined the effect of cigarette smoking on the frequency of allelic losses on chromosome 9p21 and the incidence of p16 inactivation. Chromosomal loss at 9p21-24 was determined by microsatellite analysis using 14 markers in 47 patients with non-small cell lung cancer. In addition, p16 gene inactivation was determined by DNA sequence analysis, methylation-specific PCR, and immunohistochemistry. Tumors from a group of nonsmokers (n = 14) were compared with tumors from a group of smokers (n = 33) matched for cell type, tumor stage, and gender. Allelic loss encompassing the p16 locus was present significantly (P = 0.01) more often in smokers (23 of 33 smokers, 70%) than in nonsmokers (4 of 14 nonsmokers, 28%). No significant differences in the frequency of p16 inactivation were observed between smokers and nonsmokers (45% versus 36%). However, homozygous deletion of the p16 gene locus and point mutation of p16 gene were only observed in tumors from smokers, whereas the p16 gene was inactivated in tumors from nonsmokers only through promoter hypermethylation. Thus, inactivation of the p16 gene is a common event in all non-small cell lung cancer, but the mechanism of gene alteration differs between smokers and nonsmokers. The significant link between tobacco and loss of the p16 locus identifies additional genetic targets of smoking in the pathogenesis of lung cancer.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/genética , Cromossomos Humanos Par 9 , Genes p16/genética , Neoplasias Pulmonares/genética , Fumar/genética , Idoso , Carcinoma Pulmonar de Células não Pequenas/etiologia , Deleção Cromossômica , Inibidor p16 de Quinase Dependente de Ciclina/biossíntese , Metilação de DNA , Feminino , Regulação Neoplásica da Expressão Gênica , Inativação Gênica , Humanos , Imuno-Histoquímica , Perda de Heterozigosidade , Neoplasias Pulmonares/etiologia , Masculino , Repetições de Microssatélites/genética , Mutação Puntual , Fumar/efeitos adversos
16.
Clin Cancer Res ; 5(5): 1169-72, 1999 May.
Artigo em Inglês | MEDLINE | ID: mdl-10353753

RESUMO

A reliable ELISA for screening large numbers of poly(ADP-ribose) polymerase (PARP) inhibitors is described. The test is based upon the drop in PARP activity estimated by the decrease in poly(ADP-ribose) synthesis in the presence of inhibitor. This ELISA is easy to perform, rapid, and specific. It is extremely sensitive because a clear inhibition of the total reaction could be visualized with molecules used in the nanomolar range. The assay uses no radioactivity, and automation is possible with robots for large-scale investigations. This test is of great interest for the screening of chemical libraries and the discovery of new inhibitors (and possibly activators) of PARP. Such molecules have important applications in all abnormal situations involving DNA damage and oxidative stress, such as cancer, autoimmunity, diabetes, myocardial dysfunctions, certain infections, aging, and radiation/chemical exposure.


Assuntos
Avaliação Pré-Clínica de Medicamentos/métodos , Inibidores Enzimáticos/isolamento & purificação , Ensaio de Imunoadsorção Enzimática , Inibidores de Poli(ADP-Ribose) Polimerases , Apoptose , Automação , Dano ao DNA , Reparo do DNA , Inibidores Enzimáticos/farmacologia , Humanos , Proteínas de Neoplasias/antagonistas & inibidores , Proteínas Recombinantes/antagonistas & inibidores , Sensibilidade e Especificidade
17.
J Nucl Med ; 41(10): 1657-63, 2000 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11037995

RESUMO

UNLABELLED: The aim of this study was to compare FDG PET with a new monoclonal antibody-based imaging agent that comprises an anti-carcinoembryonic antigen (CEA) monoclonal antibody Fab' fragment directly labeled with 99mTc. METHODS: Twenty-eight patients who were previously treated for colorectal carcinoma and in whom recurrence was suspected were examined with FDG PET and immunoscintigraphy. The most common indications were an elevation of serum CEA (13 patients), suggestive lesions documented by CT (9 patients), sonography (4 patients), and severe constipation (2 patients). Planar imaging and SPECT were performed 4-6 h after intravenous injection of the new imaging agent. Whole-body PET was performed 45-60 min after intravenous injection of FDG. The findings were confirmed by conventional diagnostic modalities, surgery, and histology. RESULTS: Histology confirmed local tumor recurrence in 9 of 28 patients. Clinical follow-up or CT confirmed the presence of liver metastases in 9 patients and lymph node involvement, lung metastases, and bone metastases in 2 patients each. The new agent correctly detected 8 of 9 local recurrences, whereas FDG PET was able to detect all 9 cases and in 1 case was false-positive. Liver metastases were confirmed in 9 patients by FDG PET but in only 1 patient by the new agent. Two cases with lymph node metastases and 2 cases with lung metastases were correctly identified by FDG PET, but none were detected by the new agent. Finally, bone metastases were identified in 1 patient by FDG PET but not with the new agent, whereas bone marrow infiltration (n = 1) was diagnosed by both imaging modalities. CONCLUSION: These results indicate that FDG PET and 99mTc-labeled anti-CEA Fab' are suitable for the diagnosis of local recurrence of colorectal carcinoma but that FDG PET is clearly superior in the detection of distant metastases (liver, bone, and lung) and lymph node involvement.


Assuntos
Anticorpos Monoclonais , Neoplasias Colorretais/diagnóstico por imagem , Fluordesoxiglucose F18 , Compostos de Organotecnécio , Radioimunodetecção , Tomografia Computadorizada de Emissão , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/secundário , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/secundário , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/secundário , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Valor Preditivo dos Testes , Compostos Radiofarmacêuticos , Sensibilidade e Especificidade , Tomografia Computadorizada de Emissão de Fóton Único
18.
Neurochem Int ; 23(5): 413-7, 1993 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7504548

RESUMO

A polymorphism in the gene for proteolipid protein has been identified, using amplification by the polymerase chain reaction, restriction enzyme digestion, and fragment separation by polyacrylamide gel electrophoresis. The polymorphism is located in the transcribed 3'-untranslated region, a region with potential regulatory signals. The mutation consists of a single base pair insertion into a Hae III restriction site, producing a larger rare fragment of 409 bp as compared with the more frequent 325 bp fragment. The gene for proteolipid protein is on the X chromosome; thus the males are hemizygous for the rare allele and the females are heterozygous carriers. The polymorphism occurs with a frequency of 0.046 in a population of European origin and also has a rare frequency in multiple sclerosis patients.


Assuntos
Hominidae/genética , Proteínas da Mielina/genética , Polimorfismo Genético , Animais , Sequência de Bases , DNA/sangue , DNA/isolamento & purificação , Primers do DNA , Feminino , Humanos , Masculino , Dados de Sequência Molecular , Proteína Proteolipídica de Mielina , Oligonucleotídeos Antissenso , Linhagem , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Mapeamento por Restrição , Cromossomo X
19.
Am J Ophthalmol ; 122(1): 117-9, 1996 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-8659585

RESUMO

PURPOSE: To demonstrate ophthalmic findings of bacterial endocarditis in a patient with a cardiac structural anomaly and to illustrate the potential usefulness of transesophageal echocardiography in the examination of such patients. METHODS: We examined a patient with bacteremia who had white-centered retinal hemorrhages. Complete clinical, laboratory, and echocardiographic evaluations were performed. RESULTS: Streptococcal bacteremia was proven and, by using transesophageal echocardiography, a ventricular false chorda was demonstrated. CONCLUSIONS: Patients with white-centered retinal hemorrhages should undergo thorough systemic examinations. In this unusual case of such hemorrhages caused by bacteremia in a patient with a ventricular false chorda, modern, high-resolution transesophageal echocardiography played an important role in confirming the diagnosis.


Assuntos
Bacteriemia/complicações , Embolia/complicações , Ventrículos do Coração/anormalidades , Hemorragia Retiniana/etiologia , Infecções Estreptocócicas/complicações , Adulto , Antibacterianos/uso terapêutico , Bacteriemia/tratamento farmacológico , Ecocardiografia Transesofagiana , Endocardite Bacteriana Subaguda/tratamento farmacológico , Endocardite Bacteriana Subaguda/etiologia , Feminino , Fundo de Olho , Ventrículos do Coração/diagnóstico por imagem , Ventrículos do Coração/microbiologia , Humanos , Retina/efeitos dos fármacos , Retina/patologia , Hemorragia Retiniana/tratamento farmacológico , Hemorragia Retiniana/patologia , Infecções Estreptocócicas/tratamento farmacológico , Infecções Estreptocócicas/etiologia , Streptococcus/isolamento & purificação , Transtornos da Visão/etiologia
20.
Life Sci ; 33(3): 289-96, 1983 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-6306378

RESUMO

Streptozotocin (65 mg/kg) was used to induce diabetes in male Sprague-Dawley rats. Isolated cardiac tissue exhibited a systematic depression in atrial pacemaker function and an enhancement in ventricular function accompanied by a supersensitivity to calcium relative to control animals. beta-Adrenoceptor density was found to be significantly lowered in the treated animals. However, no change in responsiveness of the tissues to isoproterenol was observed. The systematic changes in atria and ventricle were found to be completely and partially reversed respectively, by daily administration of 4-5 units of Ultralente (U-100) insulin, whereas the decrease in beta-adrenoceptor number and supersensitivity to calcium were completely reversed. These results suggest that STZ by itself might not have toxic effects in the heart and that its effects may be overcome by chronic insulin-replacement.


Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Coração/efeitos dos fármacos , Insulina/uso terapêutico , Animais , Diabetes Mellitus Experimental/fisiopatologia , Coração/fisiopatologia , Átrios do Coração/fisiopatologia , Frequência Cardíaca/efeitos dos fármacos , Ventrículos do Coração/fisiopatologia , Isoproterenol/farmacologia , Masculino , Ratos , Ratos Endogâmicos , Receptores Adrenérgicos beta/efeitos dos fármacos , Fatores de Tempo
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