RESUMO
OBJECTIVE: The aim of the present study was to explore how contextual factors affect the everyday activities of women and men with rheumatoid arthritis (RA), as evident in their life stories. METHODS: Fifteen people with RA, who had retired early due to the disease, were interviewed up to three times, according to a narrative biographic interview style. The life stories of the participants, which were reconstructed from the biographical data and from the transcribed 'told story' were analysed from the perspective of contextual factors, including personal and environmental factors. The rigour and accuracy of the analysis were enhanced by reflexivity and peer-review of the results. RESULTS: The life stories of the participants in this study reflected how contextual factors (such as gender, the healthcare system, the support of families and social and cultural values) shaped their everyday activities. In a society such as in Austria, which is based on traditional patriarchal values, men were presented with difficulties in developing a non-paid-work-related role. For women, if paid work had to be given up, they were more likely to engage in alternative challenging activities which enabled them to develop reflective skills, which in turn contributed to a positive and enriching perspective on their life stories. Health professionals may thus use some of the women's strategies to help men. CONCLUSION: Interventions by health professionals in people with RA may benefit from an approach sensitive to personal and environmental factors.
Assuntos
Atividades Cotidianas/psicologia , Artrite Reumatoide/psicologia , Emprego , Qualidade de Vida/psicologia , Aposentadoria/psicologia , Adulto , Artrite Reumatoide/fisiopatologia , Biografias como Assunto , Cuidadores , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Autonomia Pessoal , Autoimagem , Fatores Sexuais , Apoio SocialRESUMO
Early diagnosis and therapy of persisting (or chronic) polyarthritis is essential for preventing permanent damage. The guidelines of the German Society for Rheumatology recommend referral to a rheumatologist 6 weeks (at the latest) after symptom onset. DMARD therapy should be initiated within 12 weeks. Even earlier, high titer rheumatoid factor, detectable antibodies to CCP, or early erosion, constitute firm arguments for initiating DMARD therapy in patients with arthritis. At this time point, fast acting combination therapy frequently achieves remission or at least low disease activity. Since TNF blockers are not commonly available for first line therapy, corticosteroids should accompany DMARD initiation. Sufficient capacity in early consultation at arthritis clinics, optimized communication with primary care physicians and sensibilisation of the entire population are essential to prevent permanent damage in as many patients as possible.
Assuntos
Antirreumáticos/uso terapêutico , Artrite Reumatoide/tratamento farmacológico , Imunossupressores/uso terapêutico , Corticosteroides/efeitos adversos , Corticosteroides/uso terapêutico , Antirreumáticos/efeitos adversos , Artrite Reumatoide/diagnóstico , Ensaios Clínicos como Assunto , Diagnóstico Diferencial , Quimioterapia Combinada , Diagnóstico Precoce , Humanos , Imunossupressores/efeitos adversos , Guias de Prática Clínica como Assunto , Encaminhamento e ConsultaRESUMO
As resources in health care systems become increasingly scarce, rheumatologists may need to provide evidence that their quality of care uses the allocated resources effectively by achieving a good outcome for patients with rheumatoid arthritis (RA). In order to assess quality, it has been recommended in other areas of medicine to gather data according to appropriate outcome measures, preferably in electronic databases, enabling identification of benchmarks to compare the outcome quality of different clinical settings. Available electronic applications commonly comprise a database for data processing and storage, as well as a tool for regularly measuring and following disease activity in individual patients. Access to aggregated data makes it possible to monitor disease activity in individual patients over time in relation to treatment. In addition, electronic applications should allow the extraction of patient data according to special characteristics for analysis. In this way, such electronic applications can provide a central database that can be used for monitoring patients in routine care, case studies or general research, as well as facilitating comparisons of quality of care in different centres or in different countries for reference purposes.
Assuntos
Artrite Reumatoide/terapia , Bases de Dados como Assunto , Garantia da Qualidade dos Cuidados de Saúde , Eletrônica Médica , Humanos , SoftwareRESUMO
OBJECTIVES: Despite early recognition and disease modifying anti-rheumatic drug (DMARD) treatment, a sizable proportion of early rheumatoid arthritis (RA) patients show radiological progression. This study was performed to determine the frequency of erosive arthritis and the pace of radiological progression in an inception cohort of patients with very early RA (Assuntos
Artrite Reumatoide/diagnóstico por imagem
, Adulto
, Idoso
, Antirreumáticos/uso terapêutico
, Artrite Reumatoide/sangue
, Artrite Reumatoide/tratamento farmacológico
, Autoanticorpos/sangue
, Biomarcadores/sangue
, Progressão da Doença
, Diagnóstico Precoce
, Feminino
, Seguimentos
, Humanos
, Masculino
, Pessoa de Meia-Idade
, Peptídeos Cíclicos/imunologia
, Prognóstico
, Radiografia
, Fator Reumatoide/sangue
, Fatores de Risco
, Índice de Gravidade de Doença
RESUMO
OBJECTIVE: To investigate the perception of values of individual core set measures by rheumatologists, and how it differs across measures and across physicians. METHODS: We designed a survey in which 44 international expert rheumatologists explicitly marked positions on the scales of seven core-set measures that in their opinion corresponded to cut-points between remission, low, moderate and high disease activity. The measures comprised swollen and tender joint counts (SJC, TJC), CRP, ESR, patient and evaluator global assessments of activity (PGA, EGA), and the Health Assessment Questionnaire Disability Index (HAQ). RESULTS: The interpretation of measures across physicians was most consistent for ESR and PGA, while for CRP and joint counts there was most variation. Joint counts and CRP implied active disease at lower relative values (using normalized scales) than did PGA, EGA or ESR (P < 0.01 for most comparisons; Bonferroni-adjusted Wilcoxon signed rank test), and most physicians tended to tolerate higher numbers of tender joints than swollen joints to define similar levels of disease activity. Given these cut-points, more RA patients in a typical cross-sectional cohort would be regarded as being in remission according to joint counts (SJC, 35%; TJC, 55%) than to global scores (PGA, 18%; EGA, 9%), and fewer patients would be regarded as being in remission by physician-derived or laboratory measures than by patient-derived ones. CONCLUSION: These data give insights into the integrative process of activity evaluation and will be informative for future survey designs, studies using physician opinion as the gold standard for criterion validity of disease activity, and allow 'activity mapping' of values on different scales based on expert opinion.
Assuntos
Artrite Reumatoide/diagnóstico , Prova Pericial , Reumatologia , Análise de Variância , Artrite Reumatoide/diagnóstico por imagem , Artrite Reumatoide/imunologia , Artrografia , Sedimentação Sanguínea , Proteína C-Reativa/análise , Estudos de Coortes , Coleta de Dados , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor/etiologia , Índice de Gravidade de DoençaRESUMO
OBJECTIVE: To explore the effect of infrared radiation of a tiled stove on patients with hand osteoarthritis (OA). METHODS: A randomized controlled crossover study was performed with 45 patients with hand OA. This sample was randomly assigned to two groups: group A [first 3 hours spent three times a week during 3 weeks in a heated tiled stove room ('Stove Period') and after 2 weeks without treatment this group was observed for another 3 weeks ('Control Period')]; and group B (first assigned to the control period and the stove period following the treatment-free period). Assessments included the visual analogue scale (VAS) for general pain, pain in the hands, and global hand function, grip strength, the Moberg Picking-up Test (MPUT), the Australian/Canadian Osteoarthritis Hand Index (AUSCAN), and the Medical Outcomes Study (MOS) 36-item Short-Form Health Status Survey (SF-36). RESULTS: Fourteen (31%) patients improved on the VAS for general pain at the end of the tiled stove period as compared to 10 patients (22%) during the control period (p = 0.314, chi2-test). The AUSCAN pain domain showed a significant improvement after the tiled stove period (p = 0.034). Others pain parameters analysed (VAS for pain in hands and SF-36 bodily pain) showed moderate but not significant improvement (p = 0.682 and p = 0.237, respectively) compared to the control period. CONCLUSION: This study did not prove positive effects of the tiled stove exposure, although the numerical improvement in all pain measures suggests some possible positive effects on this symptom of hand OA.
Assuntos
Articulação da Mão , Temperatura Alta/uso terapêutico , Raios Infravermelhos/uso terapêutico , Osteoartrite/terapia , Idoso , Estudos Cross-Over , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
BACKGROUND: Early treatment prevents progression of joint damage in rheumatoid arthritis (RA), but diagnosis in early disease is impeded by lack of appropriate diagnostic criteria. OBJECTIVE: To study the value of rheumatoid factor (RF), anti-cyclic citrullinated peptide autoantibodies (anti-CCP), and anti-RA33 autoantibodies for diagnosis of RA and prediction of outcome in patients with very early arthritis. METHODS: The prospective follow up inception cohort included 200 patients with very early (<3 months) inflammatory joint disease. Autoantibodies were measured at baseline and analysed in a tree based model which aimed at determining the added diagnostic value of testing for anti-CCP and anti-RA33 as compared with RF alone. RESULTS: RA was diagnosed in 102 patients, while 98 developed other inflammatory arthropathies. Receiver operator curve analysis showed an optimum cut off level for RF at 50 U/ml, above which anti-CCP and anti-RA33 had no additional diagnostic value. Remarkably, RF >or=50 U/ml and anti-CCP showed similar sensitivity and high specificity for RA, but overlapped considerably. Anti-RA33 was less specific and did not correlate with RF or anti-CCP. Among patients with RA, 72% showed at least one of these three autoantibodies, compared with 15% of non-RA patients. RF >or=50 U/ml and anti-CCP were predictors of erosive disease, whereas anti-RA33 was associated with mild disease. CONCLUSIONS: Stepwise autoantibody testing in early inflammatory joint disease, starting with RF, followed by anti-CCP (in patients with RF <50 U/ml), and finally anti-RA33, should be used as a sensitive and effective strategy for distinguishing patients with RA at high risk for poor outcome.
Assuntos
Artrite Reumatoide/diagnóstico , Autoanticorpos/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Antinucleares/sangue , Artrite Reumatoide/diagnóstico por imagem , Biomarcadores/sangue , Progressão da Doença , Diagnóstico Precoce , Métodos Epidemiológicos , Humanos , Pessoa de Meia-Idade , Peptídeos Cíclicos/imunologia , Prognóstico , Radiografia , Fator Reumatoide/sangue , Ribonucleoproteínas/imunologiaRESUMO
OBJECTIVE: To evaluate the interobserver reliability among 14 experts in musculoskeletal ultrasonography (US) and to determine the overall agreement about the US results compared with magnetic resonance imaging (MRI), which served as the imaging "gold standard". METHODS: The clinically dominant joint regions (shoulder, knee, ankle/toe, wrist/finger) of four patients with inflammatory rheumatic diseases were ultrasonographically examined by 14 experts. US results were compared with MRI. Overall agreements, sensitivities, specificities, and interobserver reliabilities were assessed. RESULTS: Taking an agreement in US examination of 10 out of 14 experts into account, the overall kappa for all examined joints was 0.76. Calculations for each joint region showed high kappa values for the knee (1), moderate values for the shoulder (0.76) and hand/finger (0.59), and low agreement for ankle/toe joints (0.28). kappa Values for bone lesions, bursitis, and tendon tears were high (kappa = 1). Relatively good agreement for most US findings, compared with MRI, was found for the shoulder (overall agreement 81%, sensitivity 76%, specificity 89%) and knee joint (overall agreement 88%, sensitivity 91%, specificity 88%). Sensitivities were lower for wrist/finger (overall agreement 73%, sensitivity 66%, specificity 88%) and ankle/toe joints (overall agreement 82%, sensitivity 61%, specificity 92%). CONCLUSION: Interobserver reliabilities, sensitivities, and specificities in comparison with MRI were moderate to good. Further standardisation of US scanning techniques and definitions of different pathological US lesions are necessary to increase the interobserver agreement in musculoskeletal US.
Assuntos
Educação Médica Continuada/métodos , Sistema Musculoesquelético/diagnóstico por imagem , Doenças Reumáticas/diagnóstico por imagem , Reumatologia/educação , Adulto , Idoso , Articulação do Cotovelo/diagnóstico por imagem , Articulações dos Dedos/diagnóstico por imagem , Articulação do Quadril/diagnóstico por imagem , Humanos , Articulação do Joelho/diagnóstico por imagem , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Variações Dependentes do Observador , Sensibilidade e Especificidade , Articulação do Ombro/diagnóstico por imagem , Articulação do Dedo do Pé/diagnóstico por imagem , Ultrassonografia , Articulação do Punho/diagnóstico por imagemRESUMO
OBJECTIVE: To determine if rheumatologists have changed their views on diagnosis and treatment of early rheumatoid arthritis (RA). METHODS: Three consecutive questionnaires were sent out to international rheumatologists in 1997, 2000, and 2003. The following aspects of early RA were covered: definition; patient referral time; diagnostic means; follow up intervals; and treatment strategies. All initial participants who responded to at least one of the follow up surveys were included in the analysis. RESULTS: RA is now defined by a smaller number of affected joints (monarthritis: 9.8% respondents in 1997 v 17.4% in 2003), and shorter symptom duration (<3 months: 65.5% in 1997 v 85.8% in 2003). Early referrals (<6 weeks) increased (8.9% in 1997 v 17.4% in 2003). Serological test for diagnosis was mostly rheumatoid factor (100% in 2003), but anti-CCP was already used by 17.4% in 2003. Follow up of patients with early RA intensified (every 2 weeks: 16.1% in 1997 v 30.4% in 2003; every month: 47.8% in 2003 v 64.3% in 1997). Treatment with disease modifying antirheumatic drugs (DMARDs) mainly comprised methotrexate, sulfasalazine, and antimalarial drugs. Leflunomide was among the two favourite DMARDs of 10.9% in 2003, whereas no biological agent was so. In 2003, 46.7% respondents started treatment with DMARDs if RA was suspected (30.9% in 1997); no one waited for erosions to occur (7.3% in 1997). CONCLUSION: The data obtained in this study suggest that the concept of diagnosing and treating RA early is accepted by a large proportion of the rheumatological community.
Assuntos
Artrite Reumatoide/diagnóstico , Artrite Reumatoide/tratamento farmacológico , Atitude do Pessoal de Saúde , Prática Profissional/tendências , Antirreumáticos/uso terapêutico , Biomarcadores/sangue , Pesquisas sobre Atenção à Saúde , Humanos , Assistência de Longa Duração/métodos , Prática Profissional/estatística & dados numéricos , Encaminhamento e Consulta/estatística & dados numéricos , Fator Reumatoide/sangue , Testes Sorológicos/métodos , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: Delay of disease-modifying anti-rheumatic drug (DMARD) therapy is a major contributing factor for poor outcome in rheumatoid arthritis (RA). Although early therapy has been shown to be particularly effective, there is still uncertainty about the optimal time point of DMARD introduction. We wanted to test if a therapeutic window of opportunity may exist within the first few months of the disease. METHODS: In this case-control parallel-group study, 20 very early RA (VERA) patients with median disease duration of 3 months were age and gender matched to a group of 20 late early RA (LERA) patients with median disease duration of 12 months until first DMARD initiation. Follow-up time was 36 months. Primary outcome measures were the disease activity score (DAS28) and radiological joint destruction using the Larsen method. RESULTS: Already after 3 months of DMARD therapy we found a significant difference of improvement in favour of the VERA patients in the DAS28. This trend continued over the study period. At study end the DAS28 showed an improvement of 2.8+/-1.5 in the VERA vs 1.7+/-1.2 in the LERA group (P(c)<0.05). The Larsen scores showed a statistically significant retardation of progression in the VERA compared with the LERA. CONCLUSION: Our results indicate that there is a window of opportunity for highly successful treatment of RA in the first year, and especially within the first 3 months of therapy. Thus, early diagnosis and therapy may be the crucial step in achieving optimal control of disease progression and prognosis in RA.
Assuntos
Antirreumáticos/uso terapêutico , Artrite Reumatoide/tratamento farmacológico , Doença Aguda , Adulto , Idoso , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Resultado do TratamentoRESUMO
OBJECTIVE: To determine the survival and clinical effectiveness of leflunomide (LEF) compared with methotrexate (MTX) and sulfasalazine (SSZ) for RA in an observational study. METHODS: An observational database of 1088 patients and 5141 patient years of DMARD treatment (2680 courses) from two academic hospitals was filtered for treatment with LEF, MTX, and SSZ. LEF treatment groups were matched for patients' age, baseline ESR, number of previous DMARDs, and hospital cohort with MTX and SSZ treatment groups. For these treatments, Kaplan-Meier analyses of time until the drug was discontinued (drug "survival"), and the effectiveness and safety of continuation of treatment, were performed. The change in disease activity markers (CRP, ESR) was compared between the groups. RESULTS: The median dose during the study increased from 10 to 15 mg MTX/week and from 1.5 to 2.0 g SSZ/day. Matched survival analysis showed better retention rates for MTX (mean (SEM) survival 28 (1) months) than for LEF (20 (1) months; p=0.001), whereas retention rates of SSZ (23 (1) months) were similar to those of LEF (p=NS). Treatments were stopped earlier because of adverse events (AEs, 3 months) than because of ineffectiveness (IE, 10 months; p<0.001). LEF and MTX were less likely to be stopped because of AEs than SSZ. LEF courses were stopped earlier for AEs (p<0.001) than MTX. CONCLUSIONS: Current dosing strategies should be re-evaluated, and coping strategies for common AEs should be investigated. This will be necessary to achieve better drug retention of LEF. At present, MTX continues to be the most effective drug in clinical practice.
Assuntos
Antirreumáticos/uso terapêutico , Artrite Reumatoide/tratamento farmacológico , Isoxazóis/uso terapêutico , Idoso , Artrite Reumatoide/imunologia , Sedimentação Sanguínea , Proteína C-Reativa/análise , Distribuição de Qui-Quadrado , Bases de Dados Factuais , Feminino , Humanos , Leflunomida , Masculino , Metotrexato/uso terapêutico , Pessoa de Meia-Idade , Estatísticas não Paramétricas , Sulfassalazina/uso terapêutico , Fatores de Tempo , Falha de TratamentoRESUMO
The Austrian Early Arthritis Registry (Austrian Early Arthritis Action, EAA) enrols and follows patients with inflammatory arthritis of very short (< 12 weeks) duration. Currently, data on 375 patients (almost 2000 individual follow-up examinations) have been entered into the EA database. Evaluations of data from 182 patients with a follow-up of at least one year are available. 65% of these patients have RA, as diagnosed using the ACR classification criteria in a cumulative fashion. Approximately 15% of these patients still have no established diagnosis and are being carried forward and observed as cases of "undifferentiated arthritis". In RA patients, the mean DAS 28 decreased significantly from an initial mean score of 5.5 (high disease activity) into the range of low disease activity. At the end of one year a DAS 28 of < 3.2 was observed in 52% of the RA patients. Radiological progression in these RA patients, who also received treatment very early, appears to be less severe than in other cohorts, although direct comparisons are impossible due to different methods of patient selection. In addition, the serological data from our cohort in cooperation with other study groups will allow development and validation of possible prediction algorithms for early arthritis patients which could improve the diagnostic and therapeutic approach to this patient group.
Assuntos
Artrite Reumatoide/diagnóstico , Artrite Reumatoide/epidemiologia , Sistema de Registros , Atividades Cotidianas , Adolescente , Adulto , Distribuição por Idade , Idoso , Antirreumáticos/uso terapêutico , Artrite/diagnóstico , Artrite/epidemiologia , Artrite Reumatoide/terapia , Áustria/epidemiologia , Terapia Combinada , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Medição da Dor , Modalidades de Fisioterapia , Amplitude de Movimento Articular/fisiologia , Fatores de Risco , Índice de Gravidade de Doença , Distribuição por Sexo , Resultado do TratamentoRESUMO
BACKGROUND: Early diagnosis and treatment with disease modifying antirheumatic drugs (DMARDs) have been advocated for patients with rheumatoid arthritis (RA). This survey focuses on the individual definitions and treatment modalities of rheumatologists, and aims at determining the practical realisation of these concepts. METHODS: A questionnaire to be self completed was handed out at the EULAR Symposium 1997. The main issues dealt with were definition, referral time, diagnosis, follow up, and treatment of early RA. Of the 111 participants, who were from all continents and all age groups, 85 (77%) gave their name and address. In 2000, the same questionnaire was sent to these 85 primary respondents. Forty four questionnaires (52%) were returned, and their results were matched and further evaluated. RESULTS: The definition of early RA was heterogeneous, but two of three rheumatologists use the term "early" for symptoms shorter than three months. There was a drift towards acceptance of involvement of fewer affected joints. Serological tests obtained for early diagnosis were mostly rheumatoid factor and antinuclear antibodies, usually in combination (approximately 70%), while other tests (antikeratin antibodies, antiperinuclear factor, anti-RA33) were used rarely, but increasingly (21-25% all together). No significant change in the lag time of referral to the specialist of patients with suspected early RA was seen within these three years (<3 months for 50%, >6 months for 20%), while the proportion followed up during the first three months increased. At both times, every second rheumatologist started DMARD treatment only when the 1987 American College of Rheumatology (ACR) criteria were fulfilled. However, in 1997 about 10% were willing to wait for erosions before starting DMARDs, while none did so in 2000. Methotrexate, sulfasalazine, and antimalarial drugs were the most commonly prescribed DMARDs in early RA, with the first two of these still being in increasing use. CONCLUSION: The understanding of "early" rheumatoid arthritis is heterogeneous, but the vast majority of the rheumatologists surveyed regard symptom duration of <3 months as early. Rheumatoid factor was the most useful laboratory support in early diagnosis. Because there has been no shortening of referral time of patients with new RA within the past three years, and many rheumatologists start DMARDs only when the ACR criteria are fulfilled, it is concluded that guidelines for early referral, as well as for early (rheumatoid) arthritis, are needed.
Assuntos
Artrite Reumatoide/diagnóstico , Reumatologia , Anticorpos Antinucleares/sangue , Antimaláricos/uso terapêutico , Antirreumáticos/uso terapêutico , Artrite Reumatoide/sangue , Artrite Reumatoide/tratamento farmacológico , Humanos , Padrões de Prática Médica , Encaminhamento e Consulta , Fator Reumatoide/sangue , Inquéritos e Questionários , Terminologia como Assunto , Fatores de TempoRESUMO
Assessing functional and health status in patients with rheumatoid arthritis (RA) can provide information on the individual's functioning in routine occupations and on the individual's well-being. Data can be obtained by a variety of functional tests and questionnaires. At the Department of Rheumatology at the Vienna University, a specific assessment for outpatients with RA is performed every 3 months. It consists of functional tests, questionnaires, Visual Analog Scales, joint counts, and parameters of disease activity. These data are used to supplement the rheumatologist's decision about medical management of the disease and about further therapeutic strategies.
Assuntos
Atividades Cotidianas , Artrite Reumatoide/fisiopatologia , Nível de Saúde , Seguimentos , Humanos , Avaliação de Resultados em Cuidados de Saúde , Fatores de Tempo , Resultado do TratamentoAssuntos
Doenças Musculoesqueléticas/diagnóstico por imagem , Mãos/diagnóstico por imagem , Calcanhar/diagnóstico por imagem , Humanos , Articulações/diagnóstico por imagem , Radiologia/educação , Dedos do Pé/diagnóstico por imagem , Transdutores , Ultrassonografia/instrumentação , Ultrassonografia/métodos , Punho/diagnóstico por imagemRESUMO
Recent onset arthritis reminiscent of rheumatoid arthritis (RA) may be an early manifestation of an occult malignancy. In this report, we present two patients with cancer-associated polyarthritis. Both suffered from symmetric polyarthritis when initially visiting their physicians and did not achieve relief when treated with non-steroidal anti-rheumatic drugs (NSAIDs). In both patients, subsequent work-up led to the diagnosis of an underlying malignancy. One patient suffered from small cell lung cancer (SCLC), while the other was diagnosed with adenocarcinoma of the colon. In both, the arthritis spontaneously disappeared after successful treatment of the malignancy, i.e. chemotherapy and tumor resection, respectively. We discuss these cases in view of the existing literature, since awareness of the entity of cancer polyarthritis is necessary for its timely treatment and may potentially be life-saving.
Assuntos
Artrite Reumatoide/diagnóstico , Artrite/etiologia , Síndromes Paraneoplásicas/diagnóstico , Adenocarcinoma/patologia , Idoso , Artrite Reumatoide/etiologia , Carcinoma de Células Pequenas/patologia , Neoplasias do Colo/patologia , Diagnóstico Diferencial , Humanos , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Neoplasias Primárias DesconhecidasRESUMO
The human autologous mixed lymphocyte reaction (AMLR) consists of a proliferative response of primarily CD4+ T lymphocytes stimulated by autologous non-T cells expressing class II MHC-encoded gene products and is thought to represent a self-recognitive mechanism that might be important in regulating the cellular interactions involved in the generation of normal immune responses. To further define appropriate stimulator cell populations, as well as the molecular mechanism responsible for the initiation of AMLR, we compared the T cell-stimulatory capacity of highly purified populations of peripheral blood dendritic cells (DCs) and monocytes (Mos) under serum-free conditions, thus carefully avoiding the presence of xenogeneic Ags. Whereas both freshly isolated Mos and DCs were found to be poor stimulators of autologous T cell proliferation, preactivation of DCs, but not of Mos, for 48 h with granulocyte-macrophage CSF led to a 113-fold increase in DC stimulatory capacity. AMLR was inhibited by mAbs against HLA-DR and CD4 molecules, and, in addition, showed a higher dependence on the granulocyte-macrophage CSF-induced up-regulation and/or de novo expression of the costimulatory molecules B7-2 and, in particular, B7-1 as compared with an Ag-specific or allogeneic MLR. Thus, our data suggest that the high density of costimulatory molecules together with MHC class II molecules on competent APCs appear to be the major triggers for the initiation of AMLR.
Assuntos
Apresentação de Antígeno/imunologia , Antígenos CD/imunologia , Antígeno B7-1/imunologia , Células Dendríticas/imunologia , Ativação Linfocitária/imunologia , Glicoproteínas de Membrana/imunologia , Linfócitos T/imunologia , Antígeno B7-2 , Células Cultivadas , Antígenos de Histocompatibilidade Classe II/imunologia , HumanosRESUMO
Rheumatoid arthritis (RA) is a disease that seriously affects patients' quality of life and may lead to disability or even premature death, despite the availability of effective treatments. Evidence suggests that delay of treatment may be the main contributing factor for poor outcome. Delay is caused primarily by the erroneous belief that the course of RA may be controlled in many cases by mild measures such as nonsteroidal antiinflammatory drugs, physiotherapy, and rest. While this may be true in a certain percentage of patients, many patients with RA progress to severe disability. To prevent progression of disease, early treatment of RA, particularly in patients at high risk, seems mandatory. Therefore, early arthritis clinics (EAC) have been established in a number of countries. We discuss the rationale for early intervention and our experiences in Austrian EAC.
Assuntos
Instituições de Assistência Ambulatorial/tendências , Artrite Reumatoide/terapia , Humanos , Fatores de TempoRESUMO
Rheumatoid arthritis (RA) is the most frequent inflammatory joint disease, and it affects about 1% of the population. The onset of arthritis is rarely acute; it is subacute and usually progresses slowly. The clinical picture of RA is variable: mild to very aggressive and destructive courses, sometimes accompanied by organ involvement, leading to severe functional impairment and early disability can be observed. RA is diagnosed according to the ACR criteria published in 1958 and modified in 1988. The appearance of a palpable joint swelling or effusion is obligatory for the clinical diagnosis of arthritis. In RA, typically involvement of the joint of the hands and feet can be seen. Laboratory parameters play an important role as both diagnostic and prognostic tools. Besides clinical features and laboratory parameters, imaging techniques provide another cornerstone in the diagnosis of RA. Until now plain X-rays, which primarily visualize osseous changes, are the most important technique in daily practice, whereas magnetic resonance imaging and ultrasound may provide information about soft tissue changes in an earlier stage of disease. The main differential diagnoses of RA to be considered are the seronegative spondylarthropathies (psoriatic arthritis, arthritides accompanying inflammatory bowel diseases, Reiter's syndrome, and spondylitis ankylosans with peripheral arthritis), Parvovirus-induced arthritis, crystal-induced arthritides and septic arthritis. Early diagnosis and therapeutic intervention seem to be of great prognostic importance. In several independently performed investigations a higher mortality was found in RA patients than in the normal population. Drug therapy of RA consists of nonsteroidal antirheumatic drugs (NSAIDs), corticosteroids and disease-modifying drugs (DMARDs). When the functional and radiological parameters were assessed, the DMARDs were found to have a disease modifying and in rare cases a remission-inducing property. Moreover, tolerance these to drugs is limited. Newer therapeutic trials have employed substances like Tenidap, Leflunomid, bacterial extracts, antibiotics and biological subcomes (e.g., monoclonal antibodies against cytokines, fusion proteins for soluble cytokinereceptors). Some promising results of these investigations need confirmation in larger patient populations, but some new perspectives for a more efficacious treatment of RA can be expected.