Prevalence of positive tuberculin skin test in a Brazilian sample of rheumatoid arthritis and spondylarthritis patients.

OBJECTIVE: Patients with rheumatic diseases have an increased risk of infections, especially tuberculosis. In this study, we aimed to recognize the positivity rate of tuberculosis skin test in patients with rheumatoid arthritis and spondyloarthritis and the characteristics of the patients with positive results. METHODS: Retrospective study of tuberculosis skin test results in patients followed from 2004 to 2021 in a single rheumatology unit. Data related to clinical and epidemiological features, along with treatment information referring to the period in which the tuberculosis skin test was performed, were collected from patients' charts. RESULTS: A total of 723 tests were identified (448 tests in 269 rheumatoid arthritis patients and 275 in 174 spondyloarthritis patients). In the rheumatoid arthritis sample, 31/275 (11.5%) individuals had positive tests, and in the spondyloarthritis, 38/174 (21.8%) had positive tests. In the rheumatoid arthritis sample, patients with positive tuberculosis skin tests used a higher dose of methotrexate than those with negative results (median of 25 mg/week versus median of 20 mg/week respectively; p=0.02). In the spondyloarthritis sample, tuberculosis skin test positivity was associated with alcohol ingestion (13.1% versus 2.9% in users and non-users respectively; p=0.02) and sulfasalazine use (15.7% of positivity in users versus 5% in non-users; p=0.01). CONCLUSION: The tuberculosis skin test-positive prevalence in rheumatoid arthritis was lower than in the spondyloarthritis sample. Patients with rheumatoid arthritis using a higher dosage of methotrexate or with spondyloarthritis using sulfasalazine had more frequency of tuberculosis skin test positivity and should be carefully followed by the attending physician in order to avoid the appearance of full-blown tuberculosis.

Prevalence of positive tuberculin skin test in a Brazilian sample of rheumatoid arthritis and spondylarthritis patients

SUMMARY OBJECTIVE: Patients with rheumatic diseases have an increased risk of infections, especially tuberculosis. In this study, we aimed to recognize the positivity rate of tuberculosis skin test in patients with rheumatoid arthritis and spondyloarthritis and the characteristics of the patients with positive results. METHODS: Retrospective study of tuberculosis skin test results in patients followed from 2004 to 2021 in a single rheumatology unit. Data related to clinical and epidemiological features, along with treatment information referring to the period in which the tuberculosis skin test was performed, were collected from patients' charts. RESULTS: A total of 723 tests were identified (448 tests in 269 rheumatoid arthritis patients and 275 in 174 spondyloarthritis patients). In the rheumatoid arthritis sample, 31/275 (11.5%) individuals had positive tests, and in the spondyloarthritis, 38/174 (21.8%) had positive tests. In the rheumatoid arthritis sample, patients with positive tuberculosis skin tests used a higher dose of methotrexate than those with negative results (median of 25 mg/week versus median of 20 mg/week respectively; p=0.02). In the spondyloarthritis sample, tuberculosis skin test positivity was associated with alcohol ingestion (13.1% versus 2.9% in users and non-users respectively; p=0.02) and sulfasalazine use (15.7% of positivity in users versus 5% in non-users; p=0.01). CONCLUSION: The tuberculosis skin test-positive prevalence in rheumatoid arthritis was lower than in the spondyloarthritis sample. Patients with rheumatoid arthritis using a higher dosage of methotrexate or with spondyloarthritis using sulfasalazine had more frequency of tuberculosis skin test positivity and should be carefully followed by the attending physician in order to avoid the appearance of full-blown tuberculosis.

Resistin serum levels and its association with clinical profile and carotid intima-media thickness in psoriasis: a cross-sectional study.

BACKGROUND: Psoriasis is a protean disease associated with several comorbidities that may have increased levels of adiponectin such as resistin. This may affect the patients atherosclerotic risk. OBJECTIVE: To study resistin levels in a sample of Brazilian patients with psoriasis and its association with clinical profile, comorbidities, and carotid Intima-Media Thickness (cIMT). METHODS: This is a cross-sectional study of 119 individuals: 34 healthy controls and 85 patients with psoriasis, 42 of which with skin involvement only and 43 with psoriatic arthritis. Clinical and epidemiological data, measurement of PASI (Psoriasis Area Severity Index) and DAPSA (Disease Activity in Psoriatic Arthritis), lipid profile, cIMT by ultrasound were collected from medical records. Resistin serum levels were measured by ELISA. RESULTS: Patients with psoriasis had higher resistin levels (p=0.009) and worse cIMT (p=0.0002) than controls. In the psoriasis sample, no associations of resistin levels with epidemiological, clinical findings, and activity indexes were found. Resistin serum levels were associated with the presence of diabetes (p=0.008) and metabolic syndrome (p=0.01) and correlated with total cholesterol (r=0.26) and triglycerides (r=0.33) but not with cIMT. STUDY LIMITATIONS: This work is limited by its transversal design and by the limited number of patients included. CONCLUSION: Resistin serum levels are elevated in psoriasis patients. In this sample, clinical, epidemiological, and activity indexes were not linked to resistin serum levels, but atherosclerotic risk factors were.

Participating as a research team during the COVID-19 pandemic benefits mental health of undergraduate medical students in Brazil.

During the COVID-19 pandemic, undergraduate medical students (UMS) exposed to isolation, social distancing and complete or partial face-to-face educational activities interruption may present increased stress, depression and anxiety. This study was undertaken to evaluate if, during isolation, UMS involved in online group activities as investigators of a research project (volunteer group) would present better mental health than their colleagues, not involved in that research (control group). A Web-based survey, via the Google Forms platform, including details on demographic data, life habits, previous health conditions, worries with the COVID-19 pandemic, sleep pattern modifications and depression, anxiety and mental stress, using the DASS-21 (Depression, Anxiety and Stress Scale) was implemented from 20 July to 31 August 2020. Statistical analysis was performed using the SPSS version 20.0. A p-value <0.05 was significant. A total of 684 UMS were included, 228 as a volunteer group and 456 as a control group. Mean age was 23.15 (3.16) years. The groups were paired for age, gender, ethnicity, life habits and previous health conditions. Older age, male gender, participation in the research project, unchanged sleep pattern during the pandemic, lack of fear from getting the COVID-19 and lack of previous health conditions were associated with lower DASS21 scores (better mental health). Participating as investigators of a research project foreseeing frequent interaction with patients, colleagues and professors (other investigators) lead to better mental health during the COVID-19 quarantine in Brazil.

Resistin serum levels and its association with clinical profile and carotid intima-media thickness in psoriasis: a cross-sectional study

Abstract Background Psoriasis is a protean disease associated with several comorbidities that may have increased levels of adiponectin such as resistin. This may affect the patients atherosclerotic risk. Objective To study resistin levels in a sample of Brazilian patients with psoriasis and its association with clinical profile, comorbidities, and carotid Intima-Media Thickness (cIMT). Methods This is a cross-sectional study of 119 individuals: 34 healthy controls and 85 patients with psoriasis, 42 of which with skin involvement only and 43 with psoriatic arthritis. Clinical and epidemiological data, measurement of PASI (Psoriasis Area Severity Index) and DAPSA (Disease Activity in Psoriatic Arthritis), lipid profile, cIMT by ultrasound were collected from medical records. Resistin serum levels were measured by ELISA. Results Patients with psoriasis had higher resistin levels (p = 0.009) and worse cIMT (p = 0.0002) than controls. In the psoriasis sample, no associations of resistin levels with epidemiological, clinical findings, and activity indexes were found. Resistin serum levels were associated with the presence of diabetes (p = 0.008) and metabolic syndrome (p = 0.01) and correlated with total cholesterol (r = 0.26) and triglycerides (r = 0.33) but not with cIMT. Study limitations This work is limited by its transversal design and by the limited number of patients included. Conclusion Resistin serum levels are elevated in psoriasis patients. In this sample, clinical, epidemiological, and activity indexes were not linked to resistin serum levels, but atherosclerotic risk factors were.

Estudo comparativo da qualidade de vida de doentes com lúpus, artrite reumatoide e fibromialgia / Comparative study of quality of life in rheumatoid arthritis, systemic lupus erythematosus and fibromyalgia

Introdução: Doenças reumatológicas são enfermidades que acometem o sistema locomotor e afetam a qualidade de vida dos portadores. Objetivos: Comparar a qualidade de vida naqueles com lúpus, artrite reumatoide e fibromialgia. Métodos: Estudo observacional no qual foi aplicado o Questionário de Qualidade de Vida SF-36 em 136 pacientes diagnosticados com lúpus, artrite reumatóide e fibromialgia. Resultados: Os com lúpus apresentaram menor limitação funcional e os artrite reumatóide apresentaram mais dor. A avaliação do estado geral de saúde (p=0,26), da vitalidade (p=0,09), da aspectos sociais (p=0,44), saúde emocional (p=0,82) não demonstraram relevância estatística. Conclusão: As 3 doenças reumáticas apresentam diminuição da QoL, mas os com mais dor foram os com artrite reumatóide, e os com menor limitação funcional os de lúpus.

Background: Rheumatologic illnesses are diseases that affect the locomotor system and decrease patient's quality of life. Objective: To compare quality of life in patients diagnosed with lupus, rheumatoid arthritis and fibromyalgia. Methods: Cross-sectional study with application of the SF-36 Quality of Life Questionnaire to 136 patients diagnosed with lupus, rheumatoid arthritis and fibromyalgia. Results: Patients with lupus had lower functional limitation and those with rheumatoid arthritis presented more pain. The assessment of general health status (p=0.26), vitality (p=0.09), social aspects (p=0.44), emotional health (p=0.82) did not show statistical relevance. Conclusion: The 3 rheumatic diseases showed a decrease in quality of life, but the one with the most pain was rheumatoid arthritis, and the lowest functional limitation was found in lupus.

Análise preliminar do uso de biológicos no tratamento da artrite reumatoide / Preliminary analysis for the use of biologicals in the treatment of rheumatoid arthritis

Introdução: A artrite reumatoide é tratada com drogas modificadoras da doença convencionais e biológicas. Objetivos: Comparar a sobrevida de medicamentos biológicos utilizados para o tratamento de pacientes com artrite reumatoide. Método: Estudo retrospectivo de prontuários de pacientes que utilizaram medicamento biológico para tratamento de artrite reumatoide de janeiro de 2020 a janeiro de 2022 e este foi suspenso. Dados acerca das causas de retirada, tempo de uso, dados epidemiológicos, clínicos e de comorbidades foram coletados. Resultados: O principal motivo da descontinuidade foi a falha seguida por efeitos colaterais. Infliximabe e adalimumabe foram os que apresentaram maior sobrevida. Índice de massa corporal e o tabagismo, sexo e idade não mostraram interferência nesta sobrevida Conclusão: Falha é a causa mais comum de descontinuidade dos biológicos. Dentre os fatores estudados (fumo, indice de massa corporal, idade e sexo) não foi possível identificar variável que se associasse com falha.

Introduction: Rheumatoid arthritis is treated with conventional and biological disease-modifying drugs. Objectives: To compare the survival of biological drugs used for the treatment of rheumatoid arthritis patients. Methods: Retrospective study of medical records of patients who used biological medication for the treatment of rheumatoid arthritis from January 2020 to January 2022 and this was suspended. Data on the causes of withdrawal, duration of use, epidemiological, clinical and comorbid data were collected. Results: The main reason for discontinuity was failure followed by side effects. Infliximab and adalimumab had the highest survival. Body mass index and smoking, sex and age did not interfere in this survival. Conclusion: Failure is the most common cause of biological discontinuity. Among the factors studied (smoking, body mass index, age and gender) it was not possible to identify a variable that was associated with failure.

Seroconversion of rheumatoid arthritis patients after yellow fever vaccination.

Vaccination is a current strategy used to prevent infections in patients with immune-mediated rheumatic diseases. However, the use of live-attenuated vaccines prepared from living microorganisms in these patients should be avoided due to the risk of acquiring infections. The present study aimed to investigate the effect of the yellow fever (YF) vaccine (a live-attenuated vaccine) in 12 patients with rheumatoid arthritis (RA). The sample comprised 12 patients (9 females and 3 males; mean age 52.2 ± 6.5 years) with RA, who inadvertently received fractionated 17D yellow fever vaccination during an outbreak of this disease. In this cohort, 10 were administered leflunomide; 7 were administered methotrexate; 6 were administered prednisone (median dose of 5.0 mg/day); 6 took biologic drugs; and 1 took tofacitinib. All but one patient (used rituximab, prednisone, and methotrexate) seroconverted. None of them developed clinical signs of infection after the procedure. The fractionated dose of the YF vaccine is effective and safe in the observed sample. Key Points • Patients with autoimmune inflammatory rheumatic diseases (AIIRD) are at a high risk of acquiring infections • The fractionated dose of the YF vaccine is effective and safe in the observed sample • Vaccination against YF should be avoided in patients with AIIRD under immunosuppression owing to the risks of inducing YF infection.

Effects of Participating in a Research Project During the COVID-19 Pandemic on Medical Students' Educational Routines and Mental Health: Protocol for a Web-Based Survey Study.

BACKGROUND: The COVID-19 pandemic has resulted in social isolation, which has a potential negative impact on the educational routines (eg, the suspension of face-to-face appointments) and mental health of medical students. The Mario Pinotti II (MPII) study is a 24-week observational study that conducted scheduled telephone calls every 2 weeks to verify the occurrence of COVID-19 in patients with rheumatic diseases on chronic hydroxychloroquine therapy (from March 29, 2020, to September 30, 2020). The effects of voluntarily participating in a research project (ie, one that involves interactions via telephone contact with patients, professors, rheumatologists, and colleagues) on the daily lives and mental health of medical students requires evaluation. OBJECTIVE: As medical students are professionals in training and have a high level of responsibility in terms of handling the emotional and physical aspects of several diseases, this study aims to evaluate the impacts of the COVID-19 pandemic and participation in the MPII study on the educational routines and mental health of medical students. METHODS: A web-based survey was carried out to perform a cross-sectional comparative assessment of medical students who participated in the MPII study and their colleagues who were not involved in the MPII study. Participants from both groups were matched based on sex, age, and medical school. The web questionnaire was developed by a panel composed of graduate medical students, rheumatologists, medical school professors, and a psychology professor. The questionnaire included details on demographic and life habits data and evaluated participants' impressions of the MPII study and the impact of the COVID-19 pandemic on their educational routines and medical training. In addition, depression, anxiety, and stress were evaluated using the Brazilian version of the Depression, Anxiety, and Stress Scale (DASS)-21, and currently, the DASS-21 scores are grouped as those that indicate a low, moderate, or high risk of mental distress. This project was approved by the Federal University of São Paulo Ethics Committee (CAAE: 34034620.0.0000.5505). RESULTS: Data were collected from both medical student groups from July 20 to August 31, 2020. Data extraction was completed in September 2020. The data analysis is ongoing. We expect the results to be published in the first semester of 2021. CONCLUSIONS: This study will provide insight into the effects of participating in a research project on depression, anxiety, and stress, which will be determined by applying the DASS-21 to a large sample of Brazilian undergraduate medical students. We will also evaluate the impact of the COVID-19 pandemic on medical students' educational routines and medical training. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/24617.

Treating rheumatoid arthritis with leflunomide monotherapy versus combination therapy with methotrexate.

OBJECTIVE: Combination therapies have been proposed as a strategy to control inflammation more effectively in patients with rheumatoid arthritis (RA). Few studies examine the combined effect of methotrexate (MTX) and leflunomide (LFN). This study evaluated the symptom control and side effects of the combination of MTX and LFN compared with LFN monotherapy. METHODS: We conducted a retrospective analysis of 113 patients with RA treated with either LFN alone (n=22) or in combination with MTX (n=91). Data on disease activity score 28 erythrocyte sedimentation rate (DAS-28 ESR), DAS-28 C-reactive protein (DAS-28 CRP), blood cell count, liver enzymes, and creatinine levels were determined. Samples were collected on day 0 (initiation of LFN) and at 6 and 12 months. RESULTS: We found no differences between the 2 groups in DAS-28 on day 0 and at 6 and 12 months (p=0.89, p=0.42, and p=0.09, respectively, for DAS-28 ESR; p=0.97, p=0.27, and p=0.63, respectively, for DAS-28 CRP). In addition, we observed no differences in the blood cell count, liver enzymes, and creatinine levels between the treatment groups at any of the time points (all p>0.05). CONCLUSION: Our results suggest that the efficacy of the combined treatment with MTX and LFN is similar to that of LFN alone. No increase in toxicity was observed with the combination therapy.

Changing rate of serious infections in biologic-exposed rheumatoid arthritis patients. Data from South American registries BIOBADABRASIL and BIOBADASAR.

OBJECTIVE: Most reports on serious infections (SI) in rheumatoid arthritis (RA) patients treated with biological disease-modifying antirheumatic drugs (bDMARDs) are from the USA and Western Europe. Data from other regions are largely missing. We report data from South American countries with different backgrounds and health-care systems but similar registries. METHODS: We merged 2010-2016 data from two registries, BIOBADABRASIL (Brazil) and BIOBADASAR (Argentina), which share the same protocol, online platform and data monitoring process. Patients with active RA were included when they began the first bDMARD or a conventional synthetic DMARD (csDMARD, control group). The SI incidence rate (IR) per 1000 patient/years and adjusted IR ratio (aIRR) were estimated for bDMARDs and csDMARDs. RESULTS: Data were analysed for 3717 RA patients with an exposure of 13,380 patient/years. The 2591 patients treated with bDMARDs (64% tumour necrosis factor-α inhibitors (TNFi)) had a follow-up of 9300 years, and the 1126 treated with csDMARDs had an exposure of 4081 patient/years. The SI IR was 30.54 (CI 27.18-34.30) for all bDMARDs and 5.15 (CI 3.36-7.89) for csDMARDs. The aIRR between the two groups was 2.03 ([1.05, 3.9] p = 0.034) for the first 6 months of treatment but subsequently increased to 8.26 ([4.32, 15.76] p < 0.001). The SI IR for bDMARDs decreased over time in both registries, dropping from 36.59 (28.41-47.12) in 2012 to 7.27 (4.79-11.05) in 2016. CONCLUSION: While SI remains a major concern in South American patients with RA treated with bDMARDs, a favourable trend toward a reduction was observed in the last years.Key Points• New comprehensive data on biologic drugs safety from international collaboration in South America.• First proposal for national registries data merging in South America.• Serious infections remain a major concern in RA patients treated with biologics.• A significant reduction of serious infections in RA patients exposed to biologics was observed over a 7 years period.

Rheumatoid arthritis and sleep quality / Artrite reumatoide e qualidade do sono

ABSTRACT Background: Sleep disturbances are common in rheumatoid arthritis (RA) patients and contribute to loss of life quality. Objective: To study associations of sleep quality with pain, depression and disease activity in RA. Methods: This is a transversal observational study of 112 RA patients submitted to measurement of DAS-28, Epworth scale for daily sleepiness, index of sleep quality by Pittsburg index, risk of sleep apnea by the Berlin questionnaire and degree of depression by the CES-D (Center for Epidemiologic Studies Depression scale) questionnaire. We also collected epidemiological, clinical, serological and treatment data. Results: Only 18.5% of RA patients had sleep of good quality. In univariate analysis a bad sleep measured by Pittsburg index was associated with daily doses of prednisone (p = 0.03), DAS-28 (p = 0.01), CES-D (p = 0.0005) and showed a tendency to be associated with Berlin sleep apnea questionnaire (p = 0.06). In multivariate analysis only depression (p = 0.008) and Berlin sleep apnea questionnaire (p = 0.004) kept this association. Conclusions: Most of RA patients do not have a good sleep quality. Depression and risk of sleep apnea are independently associated with sleep impairment.

RESUMO Antecedentes: Os distúrbios do sono são comuns em pacientes com artrite reumatoide (AR) e contribuem para a perda da qualidade de vida. Objetivo: Estudar as associações entre a qualidade do sono e a dor, depressão e atividade da doença na AR. Métodos: Estudo observacional transversal com 112 pacientes com AR submetidos à avaliação do DAS-28, escala de Epworth para sonolência diurna, qualidade do sono pelo índice de Pittsburg, risco de apneia do sono pelo questionário de Berlim e grau de depressão pelo questionário CES-D (Center for Epidemiologic Studies Depression). Também foram coletados dados epidemiológicos, clínicos, sorológicos e de tratamento. Resultados: Apenas 18,5% dos pacientes com AR tinham uma boa qualidade do sono. Na análise univariada, um sono ruim medido pelo índice de Pittsburg esteve associado à dose diária de prednisona (p = 0,03), DAS-28 (p = 0,01), CES-D (p = 0,0005) e mostrou uma tendência a estar associado à apneia do sono pelo questionário de Berlim (p = 0,06). Na análise multivariada, somente a depressão (p = 0,008) e a apneia do sono pelo questionário de Berlim (p = 0,004) mantiveram essa associação. Conclusões: A maior parte dos pacientes com AR não tem uma boa qualidade de sono. A depressão e o risco de apneia do sono estão independentemente associados ao comprometimento do sono.

Rheumatoid arthritis and sleep quality.

BACKGROUND: Sleep disturbances are common in rheumatoid arthritis (RA) patients and contribute to loss of life quality. OBJECTIVE: To study associations of sleep quality with pain, depression and disease activity in RA. METHODS: This is a transversal observational study of 112 RA patients submitted to measurement of DAS-28, Epworth scale for daily sleepiness, index of sleep quality by Pittsburg index, risk of sleep apnea by the Berlin questionnaire and degree of depression by the CES-D (Center for Epidemiologic Studies Depression scale) questionnaire. We also collected epidemiological, clinical, serological and treatment data. RESULTS: Only 18.5% of RA patients had sleep of good quality. In univariate analysis a bad sleep measured by Pittsburg index was associated with daily doses of prednisone (p=0.03), DAS-28 (p=0.01), CES-D (p=0.0005) and showed a tendency to be associated with Berlin sleep apnea questionnaire (p=0.06). In multivariate analysis only depression (p=0.008) and Berlin sleep apnea questionnaire (p=0.004) kept this association. CONCLUSIONS: Most of RA patients do not have a good sleep quality. Depression and risk of sleep apnea are independently associated with sleep impairment.

Serum pentraxin 3 levels are negatively associated with carotid intima media thickness in non-obese rheumatoid arthritis patients.

BACKGROUND: Pentraxin-3 (PTX3) is a long pentraxin that is supposed to participate in the inflammatory process and in atherosclerosis. AIM: To study PTX3 serum levels in rheumatoid arthritis (RA) patients to know if its serum levels may reflect disease activity and/or subclinical atherosclerosis. METHODS: PTX3 and carotid intima media thickness (IMT) were studied in 85 RA patients (83.5% females, median age of 59years old, median disease duration of 13years) along with its demographic, clinical, serological and lipid profile. For comparison PTX3 was measured in 85 healthy volunteers. RESULTS: PTX3 levels in RA patients were similar to controls (p=0.21) and did not correlate with inflammatory activity measured by ESR (p=0.39) CRP (p=0.18) and DAS28 (p=0.67). Serum PTX3 levels were higher in nonobese RA patients than in obese (BMI vs PTX3 with rho=-0.27; 95%IC=-0.46 to -0.06; p=0.009). In non-obese patients, PTX3 correlated negatively with carotid IMT (rho=-0.40; 95%IC=-0.66 to -0.06; p=0.01) but not in the obese ones (p=0.26). In the obese RA patients there was a negative correlation between PTX3 levels and LDL/HDL ratio (Rho=-0.29; 95%IC=-0.53-0.01; p=0.03). CONCLUSIONS: PTX3 levels do not reflect inflammatory process in RA. However, it exerts a protective role in the process of atherogenesis in non-obese RA patients.

ON VASCULAR STENOSIS, RESTENOSIS AND MANNOSE BINDING LECTIN.

Mannose binding lectin is a lectin instrumental in the innate immunity. It recognizes carbohydrate patterns found on the surface of a large number of pathogenic micro-organisms, activating the complement system. However, this protein seems to increase the tissue damage after ischemia. In this paper is reviewed some aspects of harmful role of the mannose binding lectin in ischemia/reperfusion injury.

On vascular stenosis, restenosis and mannose binding lectin / Acerca de estenose vascular, re-estenose e lectina ligadora da manose

Mannose binding lectin is a lectin instrumental in the innate immunity. It recognizes carbohydrate patterns found on the surface of a large number of pathogenic micro-organisms, activating the complement system. However, this protein seems to increase the tissue damage after ischemia. In this paper is reviewed some aspects of harmful role of the mannose binding lectin in ischemia/reperfusion injury.

Lectina de ligação à manose é uma lectina instrumental na imunidade inata. Ela reconhece padrões de hidratos de carbono encontrados na superfície de um grande número de microrganismos patogênicos, que ativam o sistema complemento. No entanto, esta proteína parece aumentar o dano tecidual após isquemia. Neste trabalho são revisados alguns aspectos do papel nocivo da lectina de ligação à manose na lesão de isquemia/reperfusão.

Uric acid and tissue repair / Ácido úrico e reparação tecidual

Uric acid, a metabolic product of purines, may exert a role in tissue healing. In this review we will explore its role as an alarm initiating the inflammatory process that is necessary for tissue repair, as a scavenger of oxygen free radicals, as a mobilizer of progenitor endothelial cells and as supporter of adaptive immune system.

O ácido úrico, um produto metabólico das purinas, pode exercer um papel na cicatrização de tecidos. Nesta revisão, será explorado o seu papel no alarme inicial do processo inflamatório que é necessário para o reparo tissular, bem como a sua atuação neutralizadora de radicais livres de oxigênio, mobilizadora de células endoteliais progenitoras e favorecedora da atuação do sistema imunológico adaptativo.