Introdução: A sobrevida dos pacientes com lúpus eritematoso sistêmico juvenil (LESJ) tem melhorado progressivamente nas últimas décadas. Sendo assim, novos aspectos devem ser considerados no acompanhamento destes pacientes, tais como comprometimento da massa óssea e doenças periodontais. Objetivos: 1- Avaliar parâmetros do metabolismo ósseo e saúde oral em pacientes com LESJ comparando com grupo controle saudável; 2 - Avaliar possíveis associações entre parâmetros do remodelamento ósseo e densidade mineral óssea com alterações orais, assim como com: dados demográficos, manifestações clínicas, índices de atividade e dano cumulativo da doença, terapias utilizadas e qualidade de vida relacionada à saúde em pacientes com diagnóstico de LESJ. Métodos: Foram avaliadas 24 adolescentes púberes do sexo feminino com diagnóstico de LESJ e 29 adolescentes púberes saudáveis do sexo feminino quanto aos dados demográficos, antropométricos, clínicos e hábitos de vida.. Nos pacientes também foram determinados os índices de atividade da doença, de dano cumulativo e de qualidade de vida e a terapêutica utilizada. A avaliação do metabolismo ósseo incluiu a medida dos níveis de osteoprotegerina sérica (OPG), soluble receptor activator of nuclear factor kappa B ligand (sRANKL), propeptídeo N-terminal do prócolágeno tipo I (P1NP), telopeptídeo carboxiterminal do colágeno tipo I (CTX), 25-hidroxivitamina D, paratormônio (PTH) e densidade mineral óssea (DMO). Pacientes e controles foram submetidas à avaliação clínica oral, incluindo características clínicas, avaliação dentária e periodontal. Resultados: Pacientes com LESJ apresentaram Z-Score da coluna lombar (p < 0,001), fêmur total (p=0,027), colo do fêmur (p=0,015) e corpo total (p < 0,001) significantemente menores quando comparados aos controles saudáveis. Apresentaram também níveis significantemente mais baixos de P1NP (p=0,007), CTX (p < 0,001) e de PTH (p=0,009) quando comparados ao grupo controle. Foi encontrada correlação negativa estatisticamente significante entre dose cumulativa de glicocorticoides (GC) e o Z-Score do colo do fêmur (r= -0,491 p=0,024). Pacientes com Z-Score <= -2 no fêmur total tinham idade ao diagnóstico significantemente maior quando comparados àquelas com Z-Score > -2 [14,5 anos vs 11 anos (p=0,038)]. A mediana do número de dentes cariados, perdidos e obturados (CPO-D) foi significativamente maior em pacientes com LESJ (p=0,010) comparados aos controles e maiores doses cumulativas de GC estiveram correlacionadas com maiores índices de CPO-D (r= +0,435 p=0,048). Conclusão: Pacientes com LESJ tem redução da massa mineral óssea e do remodelamento ósseo quando comparados a controles saudáveis. Maiores doses cumulativas de GC foram correlacionadas a maior número de CPO-D e a baixa densidade mineral óssea. A DMO do fêmur total é menor em pacientes com idade maior ao diagnóstico, sugerindo que o processo inflamatório e o uso de GC durante as fases de maior formação óssea acarretam maior impacto na massa óssea. Não foi encontrada associação entre densidade ou parâmetros de metabolismo ósseo e alterações orais / Introduction: The survival of Juvenile systemic lupus erythematosus (JSLE) patients has improved progressively. Thus, new aspects must be considered in the monitoring of these patients, such as impairment of bone mass and periodontal disease. Objective: 1- To assess bone mineral density, bone turnover parameters and oral health in patients with JSLE; 2- To evaluate possible associations between parameters of bone remodeling and bone mineral density with oral amendments, as well as demographic data, clinical manifestations, activity rates and cumulative damage, therapy and quality of life related to health in patients with JSLE. Methods: Twenty-four female adolescent JSLE patients were studied and compared to 29 female adolescent healthy controls regarding demographic, anthropometric and clinical data, and habits of life. In patients also were determined indices of quality of life, activity and cumulative damage of disease and therapy used. Evaluation parameters of bone metabolism included serum levels of osteoprotegerin (OPG), soluble receptor activator of nuclear factor KB ligand (sRANKL), propeptídeo N-terminal of type I collagen (P1NP), telopeptide of type I collagen (CTX), 25 hydroxyvitamin D, parathyroid hormone (PTH) and bone mineral density (BMD). Orofacial evaluation included clinical features, dental and periodontal assessment in patients and health controls. Results: Patients with JSLE presented lower Z-score in lumbar spine (p < 0.001), total femur (p=0.027), femoral neck (p=0.015) and total body (p < 0.001) when compared to healthy controls. They also presented lower levels of P1NP (p=0.007), CTX (p < 0.001), and PTH (p=0.009) when compared to the later group. It was found a negative correlation between the cumulative dose of glucocorticoids (GC) and the femoral neck Z-score (r= -0,491 p=0.024). Patients with Z- score <= -2 in total femur had significantly higher age at diagnosis compared to those with Z- score > -2 [14,5 years vs 11 years (p= 0,038)]. Median of decayed, missing and filled teeth (DMFT) was significantly greater in JSLE patients (p=0.010) than controls. Higher cumulative doses of GC were correlated with higher indices of DMFT (r= +0.435 p=0.048). Conclusion: JSLE patients have decreased bone mineral density and bone turnover when compared to healthy controls. Furthermore, they have a larger number of DMFT. Cumulative doses of GC were correlated to the number of DMFT and low BMD. Total femur BMD was lower in patients that were older at diagnosis, suggesting that the inflammatory process and the use of GC during the greatest bone formation period constitute the major impact factors on bone mass. No association was found between BMD, bone metabolism and oral abnormalities

Introdução: A reativação do vírus latente da varicela-zoster ocasiona infecção por herpes zoster tanto em pacientes hígidos quanto em portadores de doenças crônicas e autoimunes, como lúpus eritematoso sistêmico juvenil (LESJ). As informações sobre infecção por herpes zoster (HZ), seus fatores de risco e desfecho no LESJ são limitadas devido à pequena representação desta complicação em publicações anteriores, e revela a necessidade de mais estudos visando contribuir para o melhor cuidado aos pacientes. Objetivos: Avaliar a prevalência de infecção por HZ em uma população expressiva de pacientes com LESJ, e sua possível associação com dados clínicos, demográficos, manifestações clínicas, alterações laboratoriais, atividade/dano cumulativo da doença, tratamento e evolução. Métodos: Estudo de coorte multicêntrico retrospectivo realizado em 10 serviços de Reumatologia Pediátrica do Grupo Brasileiro de Lúpus que incluiu 852 pacientes com LESJ. Os pacientes foram divididos em dois grupos: pacientes que tiveram infecção por HZ (avaliados durante episódio da infecção por herpes zoster) e pacientes sem infecção por HZ (avaliados na última consulta). Resultados: A frequência de infecção por herpes zoster foi 14,1% nos pacientes com LESJ, enquanto neuralgia pós-herpética e recorrência foram observadas em 5% dos pacientes. Ocorreu hospitalização em 61% dos pacientes e infecção bacteriana secundária em 13% dos pacientes. Quanto ao tratamento, 94% dos pacientes com LESJ recebeu aciclovir via intravenosa ou oral ao diagnóstico de infecção por HZ e nenhum deles teve complicação oftalmológica nem evoluiu para óbito. Após correção de Holm-Bonferroni para múltiplas comparações, duração da doença (1,58 vs. 4,41 anos, p<0,0001) e idade atual (13,9 vs. 17,0 anos, p < 0,0001) foram significantemente menores nos pacientes com infecção por HZ comparados aos pacientes sem esta complicação. As frequências de nefrite (37% vs. 18%, p < 0,0001), linfopenia (32% vs. 17%, p < 0,0001), hipertensão arterial (27% vs. 13%, p=0,001) e febre (35,5% vs. 5%, p < 0,0001), foram significantemente maiores nos pacientes com infecção por HZ. As medianas do score de atividade da doença/SLEDAI-2K [6,0 (0-35) vs. 2 (0-45), p < 0,0001], VHS [30 (3-120) vs. 18 (1-135) mm/1a hora, p < 0,0001] e PCR [3,05 (0-103) vs. 0,70 (0-364)mg/dL, p < 0,0001] foram significantemente maiores nos pacientes com infecção por HZ. Quanto ao tratamento, frequências do uso de prednisona (97% vs. 77%, p < 0,0001) e ciclofosfamida (20% vs. 5%, p < 0,0001) foram significantemente maiores nos pacientes com infecção por HZ, assim como medianas da dose atual de prednisona [20 (3 - 80) vs. 12,5 (1- 90) mg/dia, p<0,0001] e em mg/kg/dia [0,44 (0,5 - 3,8) vs. 0,24 (0,02 - 3,0), p < 0,0001]. A regressão logística mostrou quatro variáveis independentes associadas à infecção por HZ: duração da doença menor de 1 ano [OR 2.893 (IC 1.821-4.597), p < 0.0001], linfopenia < 1,500/mm3 [OR 1.931 (IC 1.183-3.153), p=0.009], uso de prednisona [OR 6.723 (IC 2.072-21.815), p=0.002] e uso de ciclofosfamida [OR 4.060 (IC 2.174-7.583), p < 0.0001]. Conclusões: A infecção por HZ foi evidenciada em 14% dos pacientes com LESJ. Este foi o primeiro estudo que identificou atividade da doença e tratamento do LESJ como principais fatores associados para infecção por HZ nos pacientes, que apresentou-se com distribuição típica dermatomal, baixa taxa de recorrência e complicações / Introduction: The latent varicella-zoster virus reactivation causes herpes zoster infection in healthy patients and patients with chronic and autoimmune diseases, such as childhood-onset systemic lupus erythematosus (cSLE). However, information about herpes zoster infection (HZI), risk factors and outcome in cSLE are limited due to the small representation of this complication in previous studies, and reveals the need for more studies to driving better treatments to affected patients. Objective: The aim of this multicenter study in a large childhood-onset systemic lupus erythematosus (cSLE) population was to assess the herpes zoster infection (HZI) prevalence, demographic data, clinical manifestations, laboratory, treatment and outcome. Methods: A retrospective multicenter cohort study (Brazilian cSLE group) was performed in 10 Pediatric Rheumatology services in São Paulo State, Brazil and included 852 cSLE patients. Patients were divided in two groups: patients with HZI (evaluated at the first HZI episode) and patients without HZI (evaluated at the last visit). Results: The frequency of HZI in cSLE patients was 14%. Hospitalization occurred in 61% and secondary bacterial infection in 13%. Intravenous or oral aciclovir was administered in 94% cSLE patients at HZI diagnosis. None of them had ophthalmic complication and death. Postherpetic neuralgia and recurrence rate occurred in 5%. After Holm-Bonferroni correction for multiple comparisons, disease duration (1.58 vs. 4.41 years, p < 0.0001) was significantly lower in HZI cSLE patients compared to those without HZI. Nephritis (37% vs. 18%, p < 0.0001), lymphopenia (32% vs. 17%, p < 0.0001) prednisone (97% vs. 77%, p < 0.0001), cyclophosphamide (20% vs. 5%, p < 0.0001) and SLEDAI-2K [6.0 (0-35) vs. 2 (0-45), p < 0.0001] were significantly higher in the former group. The median activity score of disease / SLEDAI-2K [6.0 (0-35) vs. 2 (0-45), p < 0.0001], ESR [30 (3-120) vs. 18 (1-135) mm/1st hour, p < 0.0001] and PCR [3.05 (0-103) vs. 0.70 (0-364) mg/dL, p < 0.0001] were significantly higher in patients with HZ infection. As for treatment, the frequency of prednisone use (97% vs. 77%, p <0.0001) and cyclophosphamide (20% vs. 5%, p < 0.0001) were significantly higher in patients with HZI, as well as the medians of the current dose of prednisone [20 (3-80) vs. 12.5 (1- 90) mg/day, p < 0.0001] and in mg/kg/day [0.44 (0.5 to 3.8) vs. 0.24 (0.02 to 3.0), P < 0.0001]. Logistic regression model showed that four independent variables were associated with HZI: disease duration < 1 year [OR 2.893 (CI 1.821-4.597), p < 0.0001], lymphopenia < 1,500/mm3 [OR 1.931 (CI 1.183-3.153), p=0.009], prednisone [OR 6.723 (CI 2.072-21.815), p=0.002] and cyclophosphamide use [OR 4.060 (CI 2.174-7.583), p < 0.0001]. Conclusion: HZI was identified in 14% of cSLE population. This was the first study that identified disease activity and treatment of cSLE as main factors associated to HZI, that presented as an early viral infection with a typical dermatomal distribution, low rate of recurrence and complications

INTRODUÇÃO: Com a melhora do prognóstico nos pacientes com lúpus eritematoso sistêmico juvenil novas recomendações são necessárias na reumatologia pediátrica, como avaliação da saúde bucal e do sistema mastigatório. O objetivo deste estudo é avaliar o comprometimento orofacial nos pacientes com lúpus eritematoso sistêmico juvenil e grupo controle, e avaliar possíveis associações entre o comprometimento orofacial e manifestações clínicas, exames laboratoriais e terapias da doença. MÉTODOS: Entre março de 2004 e julho de 2005 foram avaliados 48 pacientes com diagnóstico de lúpus eritematoso sistêmico juvenil, atendidos na Unidade de Reumatologia Pediátrica do ICr-HC-FMUSP. O grupo controle incluiu 48 crianças e adolescentes saudáveis atendidos na Divisão de Odontologia do HC-FMUSP. A pesquisa incluiu avaliação de dados sócio-demográficos, manifestações clínicas, exames laboratoriais, atividade da doença (SLEDAI), dano cumulativo (SLICC/ACR-DI) e terapias da doença. A avaliação orofacial incluiu questionário de anamnese, índice CPO-D, índice de placa, índice de sangramento gengival, relação dentária, perfil facial, índice de Helkimo e avaliação da articulação temporomandibular através da radiografia panorâmica de face em todos os pacientes e tomografia computadorizada apenas nos casos com achatamento e/ou destruição dos côndilos mandibulares. RESULTADOS: Os dois grupos foram homogêneos com relação à faixa etária, distribuição por gênero e classe sócio-econômica. A idade dos pacientes com lúpus eritematoso sistêmico juvenil variou de 87 a 218 meses (média de 161,9±38,4) e do grupo controle de 78 a 254 meses (média de 154,4±45,8; p=0,384). As medianas dos índices de placa e de sangramento gengival nos pacientes com lúpus eritematoso sistêmico juvenil foram superiores em relação aos controles (61,5X38,1; p=0,003 e 26,0X15,95; p=0,014). O índice de disfunção clínica e o índice de mobilidade mandibular mostraram-se mais alterados nos pacientes com LESJ versus controles (p=0,002, p=0,025). Correlação linear estatística foi evidenciada entre: tempo de doença e índice de sangramento gengival (p=0,017; r=0,11), dose cumulativa de prednisona e índice de placa (p=0,010, r=0,385) e dose cumulativa de prednisona e índice de sangramento gengival (p=0,001, r=0,02). A mediana do índice de mobilidade mandibular foi superior nos pacientes com lúpus eritematoso sistêmico juvenil em uso de um ou mais imunossupressores em relação aos que não utilizaram estas drogas (p=0). Apenas dois pacientes apresentaram radiografia panorâmica com achatamento e/ou destruição dos côndilos mandibulares e na tomografia computadorizada de ATM os achados foram: redução do espaço articular bilateralmente, erosões dos platôs articulares com aplainamento dos côndilos sugestivo de necrose avascular da articulação temporomandibular. CONCLUSÕES: Os pacientes com lúpus eritematoso sistêmico juvenil apresentaram uma precária higiene oral, maior freqüência de gengivite e disfunção da articulação temporomandibular em relação ao grupo controle. Os pacientes com maior tempo de doença e maior dose cumulativa de prednisona tiveram maior freqüência de gengivite e os que utilizaram imunossupressores apresentaram disfunção da articulação temporomandibular / INTRODUCTION: Given the enhanced prognosis of patients with juvenile systemic lupus erythematosus, new recommendations are necessary in pediatric rheumatology, such as the analysis of oral health and the masticatory system. The aim of this study was to compare dental and facial conditions of patients with juvenile systemic lupus erythematosus and a control group, and to evaluate a potential relationship between dental and facial endangering and clinical manifestations, laboratory tests and therapies for the disease. PATIENTS AND METHODS: A total of 48 children and adolescents with juvenile systemic lupus erythematosus attending the Pediatric Rheumatology Unit of the Children\'s Institute of our University Hospital were studied between January 2004 and July 2005. The control group included 48 healthy children and adolescents that were selected from the Odontology Division of our University Hospital. The search included the analysis of social and demographic data, clinical manifestations, laboratory tests, juvenile systemic lupus erythematosus disease activity and cumulative damage (using the SLEDAI and the SLICC/ACR-DI), and therapies. The dental and facial examination included the anamnesis questionnaire, DMFT index, plaque and gengival bleeding index, dental relationship, facial profile, Helkimo\'s index and evaluation of the temporomandibular joint through a radiographic panoramic examination of all patients and a computer tomography on those with flattening and/or destruction of the mandibular condyles. RESULTS: The two groups were homogeneous regarding age, gender and social-economic class. The age of the juvenile systemic lupus erythematosus patients ranged from 87 to 218 months (mean of 161.9±38.4) and of the control group from 78 a 254 months (mean of 154.4±45.8; p=0.384). The medians of the plaque and gingival bleeding indexes were higher in juvenile systemic lupus erythematosus patients than in the control group (61.5X38.10; p=0.003 and 26.0X15.95; p=0.014). The indexes of clinical dysfunction and mandibular mobility were higher in juvenile systemic lupus erythematosus patients versus the control group (p=0,002, p=0,025). A linear statistical correlation was evidenced between: juvenile systemic lupus erythematosus duration and the gingival bleeding index (p=0.017; r=0.11), cumulative dose of prednisone and the plaque index (p=0,010; r=0.385) and cumulative dose of prednisone and the gingival bleeding index (p=0.001, r=0.02). The median of the mandibular mobility index was higher in juvenile systemic lupus erythematosus patients that used at least one imunossupressive drugs compared with those that didn\'t use this medication (p=0). Only two patients showed a panoramic radiography with flattening and/or destruction of the mandibular condyles. The computer tomography revealed: narrowing of joint spaces bilaterally and erosions of joints plateaus with flattening of condyles that suggested avascular necrosis of temporomandibular joint. CONCLUSIONS: Juvenile systemic lupus erythematosus patients presented poor oral hygiene, higher incidence of gingivitis and temporomandibular joint dysfunction compared to the control group. Patients with longer disease duration and higher cumulative dose of prednisone had a greater incidence of gingivitis, and those who used imunossupressives drugs showed temporomandibular joint dysfunction

Objetivo: O principal propósito do estudo foi pesquisar a disfunção ventricular esquerda subclínica em pacientes com lúpus eritematoso sistêmico juvenil (LESJ) através da técnica de speckle-tracking bidimensional. Foi investigada ainda uma possível correlação entre o comprometimento da deformação miocárdica e o SLEDAI-2K (Systemic Lupus Erithematosus Disease Activity Index 2000), bem como a presença de fatores de risco cardiovascular, tanto tradicionais como ligados à doença. Métodos: 50 pacientes assintomáticos do ponto de vista cardiovascular e 50 controles saudáveis (14,74 vs. 14,82 anos, p=0.83) foram avaliados pelo ecocardiograma convencional e pelo speckle-tracking bidimensional. Resultados: Apesar da fração de ejeção normal, os pacientes apresentaram redução de todos os parâmetros de deformação miocárdica longitudinal e radial, quando comparados aos controles: strain de pico sistólico longitudinal [-20,3 (-11 a -26) vs. -22 (-17,8 a -30.4) %, p < 0,0001], strain rate de pico sistólico longitudinal [-1,19 ± 0,21 vs. -1,3 ± 0,25 s-1, p=0,0005], strain rate longitudinal na diástole precoce [1,7 (0,99 a 2,95) vs. 2 (1,08 a 3,00) s-1 , p=0,0034], strain de pico sistólico radial [33,09 ± 8,6 vs. 44,36 ± 8,72%, p < 0,0001], strain rate de pico sistólico radial [1,98 ± 0,53 vs. 2,49 ± 0,68 s-1, p < 0,0001] e strain rate radial na diástole precoce [-2,31 ± 0,88 vs. -2,75 ± 0,97 s-1, p=0,02]. O strain de pico sistólico circunferencial [-23,67 ± 3,46 vs. - 24,6 ± 2,86%, p=0,43] e o strain rate circunferencial na diástole precoce [2 (0,88 a 3,4) vs. 1,99 (1,19 a 3,7) s-1, p=0,88] foram semelhantes em pacientes e controles. Apenas o strain rate de pico sistólico circunferencial [-1,5 ± 0,3 vs. -1,6 ± 0,3 s-1, p=0,036] mostrou-se reduzido no LESJ. Uma correlação negativa foi identificada entre o strain de pico sistólico longitudinal e o SLEDAI-2K (r = - 0,52; p < 0,0001) e também o número de fatores de risco cardiovascular por paciente (r = -0,32, p=0,024). Conclusões: Foi evidenciada disfunção sistólica e diastólica subclínica de ventrículo esquerdo no LESJ através da técnica de speckle-tracking bidimensional. A atividade da doença e a exposição aos fatores de risco cardiovascular provavelmente contribuíram para o comprometimento da deformação miocárdica nesses pacientes / Objectives: The main purpose of the study was to investigate left ventricular (LV) subclinical systolic and diastolic dysfunction in childhood-onset systemic lupus erythematosus (c-SLE) patients using two-dimensional speckletracking (2DST) echocardiography. We also interrogated possible correlations between impairment of myocardial deformation and the SLE Disease Activity Index 2000 (SLEDAI-2K), as well as the presence of traditional and disease-related cardiovascular risk factors (CRFs). Method: A total of 50 asymptomatic patients and 50 controls (age 14.74 vs. 14.82 years, p = 0.83) were evaluated by standard and 2DST echocardiography. Results: Despite a normal ejection fraction (EF), there was reduction in all parameters of LV longitudinal and radial deformation in patients compared to controls: peak longitudinal systolic strain [-20.3 (-11 to -26) vs. -22 (-17.8 to -30.4)%, p < 0.0001], peak longitudinal systolic strain rate [-1.19 ± 0.21 vs. -1.3 ± 0.25 s-1, p = 0.0005], longitudinal strain rate in early diastole [1.7 (0.99-2.95) vs. 2 (1.08-3.00) s-1, p = 0.0034], peak radial systolic strain [33.09 ± 8.6 vs. 44.36 ± 8.72%, p < 0.0001], peak radial systolic strain rate [1.98 ± 0.53 vs. 2.49 ± 0.68 s-1, p < 0.0001], and radial strain rate in early diastole [-2.31 ± 0.88 vs. -2.75 ± 0.97 s-1, p = 0.02]. Peak circumferential systolic strain [- 23.67 ± 3.46 vs. -24.6 ± 2.86%, p=0.43] and circumferential strain in early diastole [2 (0,88 a 3,4) vs. 1,99 (1,19 a 3,7) s-1, p=0.88 ] were similar between patients and controls, although peak circumferential systolic strain rate [-1.5 ± 0.3 vs. -1.6 ± 0.3 s-1, p = 0.036] was reduced in c-SLE. Further analysis of patients revealed a negative correlation between LV peak longitudinal systolic strain and SLEDAI-2K(r= -0.52, p < 0.0001) and also between LV PLSS and the number of CRFs per patient (r = -0.32, p = 0.024). Conclusions: 2DST echocardiography has identified subclinical LV deformation impairment in c-SLE patients. Disease activity and cumulative exposure to CRFs contribute to myocardial compromise

Objetivo: Avaliar a citologia cérvico-vaginal em adolescentes com lúpus eritematoso sistêmico juvenil (LESJ) e comparar com controles. Material e métodos: Cinqüenta e duas adolescentes com LESJ (critérios do American College of Rheumatology) foram comparadas com 52 controles saudáveis. Todos os esfregaços de Papanicolaou foram avaliados por uma mesma citopatologista, que desconhecia o exame ginecológico, e foram classificados de acordo com o Sistema de Bethesda, 2001. Resultados: As médias das idades das pacientes com LESJ e controles foram similares (16,17 ± 1,94 versus 16,13 ± 2,16 anos, p=0,92). A citologia cérvico-vaginal foi similar em ambos os grupos, embora as relações sexuais no último mês tenham sido menos freqüentes nas pacientes com LESJ em relação aos controles (23% versus 59,6%, p=0,0003). Apenas uma paciente (2%) com LESJ e duas controles (4%) tinham displasia cervical (LIE-BG) e papilomavírus humano (HPV) (p=1,0). Citologia cérvico-vaginal inflamatória foi observada em 21 (60%) das pacientes com SLEDAI maior ou igual a 4 e em apenas 4 (23%) daqueles com SLEDAI < 4 (p=0,001). Assim como, uma maior freqüência de achados inflamatórios também foi observada em adolescentes virgens com LESJ (57% versus 8%, p=0,005). Vaginite por Candida spp foi observada em 7 pacientes com LESJ (14%) e em nenhuma dos controles (p=0,012), e foi associada com uso de drogas imunossupressoras (p=0,01) e dose alta de prednisona (p=0,002). Conclusão: Nossos achados indicam que o trato genital feminino é um órgão alvo no LESJ, pois inflamação cérvico-vaginal está associada com atividade da doença independentemente da atividade sexual. / Objective: To evaluate cervicovaginal cytology in adolescents with juvenile systemic lupus erythematosus (JSLE) and to compare them to controls. Material and methods: Fifty-two female adolescents with JSLE (American College of Rheumatology criteria) were compared to 52 age-matched healthy controls. All Pap smears were evaluated by the same cytopathologist blinded to gynecology examination, and performed according to the Bethesda Classification System 2001. Results: The mean age of JSLE patients and controls were similar (16.17 ± 1.94 vs. 16.13 ± 2.16 years, p=0.92). The cervicovaginal cytology was found to be similar in both groups, although sexual intercourses in the last month were less frequent in JSLE than controls (23% vs. 59.6%, p=0.0003). Only one patient (2%) with JSLE versus two controls (4%) had cervical dysplasia (LGSIL) and human papilomavirus (p=1.0). Inflammatory cervicovaginal cytology was observed in 21 (60%) of patients with SLEDAI ? 4 and only 4(23%) of those with SLEDAI<4 (p=0.001). Likewise, a higher frequency of inflammatory changes were also observed in virgin JSLE (57% vs. 8%, p=0.005). Candida spp vaginitis was observed in 7 JSLE (14%) versus none in controls (p=0.012) and was associated to immunosuppressive drugs (p=0.01) and high dose of prednisone (p=0.002). Conclusion: Our findings supports the notion that female genital tract is a target organ in SLE since cervical inflammation is associated to disease activity independently of sexual activity.

Les patients atteints de lupus érythémateux systémique ont une augmentation de la prévalence du syndrome métabolique (MetS) mais les mécanismes sous-jacents ne sont pas connus. Le récepteur de type Toll 7 (TLR7), qui reconnait de l’ARN simple brin, joue un rôle important dans la défense anti-microbienne de l’hôte, mais contribue également au développement et à la progression du lupus. Cependant, l’implication de TLR7 dans le MetS est inconnue. L’objectif de mon projet de thèse était d’explorer l’idée nouvelle que la signalisation de TLR7 peut conduire non seulement au lupus mais aussi à des anomalies métaboliques.Nous avons trouvé que l’obésité induite par un régime riche en gras (régime HFD) a conduit à une exacerbation du lupus et de paramètres métaboliques dans des souris TLR8ko, qui développent spontanément une auto-immunité de type lupique à cause d’une augmentation de la signalisation de TLR7 dans les cellules dendritiques (DCs). Au contraire, sous un régime HFD, les souris TLR7/8ko n’ont pas développé de lupus, et les souris TLR7ko et TLR7/8ko ont été protégées contre les anomalies métaboliques incluant l'augmentation de poids et l’intolérance au glucose. De manière intéressante, dans des souris sauvages (WT) le régime HFD a conduit à une augmentation de l’expression de TLR7 et de la production de TNF par les DCs spléniques et hépatiques, et ce phénotype était plus profond dans les souris TLR8ko. Mon étude montre l’implication de la signalisation de TLR7 dans l’interconnexion entre le lupus et les anomalies métaboliques, donc cibler TLR7 pourrait constituer une nouvelle approche comme thérapie contre le lupus et les maladies métaboliques. / Systemic lupus erythematosus (SLE) patients have increased prevalence of metabolic syndrome but the underlying mechanisms are unknown. Toll-like receptor 7 (TLR7) that detects single stranded-RNA plays a key role in antimicrobial host defence, but also contributes in the initiation and progression of SLE. However, the implication of TLR7 in MetS is unknown. The objective of my PhD project was to explore the novel idea that TLR7 signalling can lead not only to SLE but also to metabolic abnormalities. We found that high fat diet (HFD)-induced obesity led to exacerbation of lupus and metabolic parameters in TLR8ko mice, which develop spontaneous lupus-like disease due to increased TLR7 signalling by dendritic cells (DCs). In contrast, upon HFD TLR7/8ko mice did not develop SLE, and both TLR7ko and TLR7/8ko mice were protected from metabolic abnormalities including body weight gain and glucose intolerance. Interestingly, in wild-type mice HFD led to an increase of TLR7 expression and TNF production by hepatic and splenic DCs, and this phenotype was more profound in TLR8ko mice. My study uncovers the implication of TLR7 signalling in the interconnection of SLE and metabolic abnormalities, thus targeting TLR7 might be a novel approach as a tailored therapy in SLE and metabolic diseases.

<p>Systemic lupus erythematosus (SLE) is a complex autoimmune disease with unknown etiology. The aim of this thesis was to identify susceptibility regions through genetic mapping, using model-based linkage analysis on nuclear and extended SLE multicase families.</p><p>In the first paper we performed a genome scan on 19 genetically homogenous Icelandic and Swedish families. One region at 2q37 was identified with a significant linkage with contribution from both populations (Z=4.24). Five other regions 2q11, 4p13, 9p22, 9p13 and 9q13 showed suggestive linkage (Z>2.0).</p><p>In the second paper, 87 families from 10 different countries were analysed only for chromosome 1. One region at 1q31 showed significant linkage (Z=3.79) with contribution from families from all populations, including Mexicans and Europeans. Four other regions 1p36, 1p21, 1q23, and 1q25, showed levels of suggestive linkage. Linkage for most regions was highly dependent on what population was used, which indicated strong genetic heterogeneity in the genetic susceptibility for SLE.</p><p>In the two last papers, we used the positional candidate gene strategy, in order to investigate candidate genes in two regions linked to SLE. For the Bcl-2 gene (at 18q21) we could not detect any association with SLE using three different markers. However, when we investigated the tightly linked low-affinity family of FcγR genes (at 1q23), we could find association for two risk alleles in the FcγRIIA and FcγRIIIA genes. The risk alleles were transmitted to SLE patients on one specific haplotype and therefore are not independent risk alleles.</p><p>The results show that model-based linkage analysis is a strong approach in the search for susceptibility genes behind complex diseases like SLE.</p>

<p>Patients with systemic lupus erythematosus (SLE) have elevated levels of interferon (IFN)-α in blood and IFN-α-producing cells in tissues. In the present thesis, we investigate the mechanisms behind the upregulated IFN-α-production in SLE and also show that the IFN-α system is activated in primary Sjögren’s syndrome (pSS), with IFN-α-producing cells in the major affected organ, the salivary glands. The IFN-α is a type I IFN, a family of cytokines counteracting especially viral infections, by acting directly on infected cells, and via many immunomodulatory effects. The latter may also contribute to autoimmune processes.</p><p>The type I IFNs are usually produced upon recognition of microbial structures. In SLE, however, DNA-containing immune complexes (ICs) that induce IFN-α production are found. Many autoantibodies in SLE and pSS are directed to nucleic acids or to DNA/RNA-binding proteins. We show that also RNA in complex with autoantibodies from SLE or pSS patients (RNA-IC) induces IFN-α-production. The RNA could be either in the form of RNA-containing material released from apoptotic or necrotic cells or as a pure RNA-containing autoantigen, the U1 small nuclear ribonucleoprotein particle. </p><p>The IFN-α-production induced by RNA-IC occurred in plasmacytoid dendritic cells (PDCs), also termed natural IFN-producing cells (NIPCs), via binding to Fcγ-receptor IIa, endocytosis and triggering of Toll-like receptors (TLRs), probably TLR7 and TLR9. The RNA-IC may also have other effects, and we found that they induce prostaglandin E2 (PGE2) production in monocytes and tumor necrosis factor (TNF)-α in both monocytes and NIPC/PDC. The PGE2 downregulated the IFN-α induction in NIPC/PDC, and the IFN-α induction was increased in monocyte-depleted cell cultures. </p><p>The findings presented in this thesis aids in the understanding of the mechanisms behind the activated IFN-α system in SLE and other autoimmune diseases, and shows that also pSS is one of these diseases.</p>

<p>The breakdown of self-tolerance is the main driving force behind susceptibility to SLE. When this occurs, T and B cells are activated in an uncontrolled manner and produce autoantibodies against self fragmented DNA, RNA and sometimes other parts of the cell such as cardiolipin, phosphatidylserine, etc.</p><p>The mechanism behind the breakdown of self-tolerance may be genetic factors that are triggered by environmental factors. SLE is not caused by a single gene, but by many genes, and is thus a polygenic disease. So far only a few genes have been found to be associated with SLE including PDCD1, FcγRs, and PTPN22. The main aim of my thesis is to find susceptibility genes responsible for SLE.</p><p>Recently, a gene called IRF5 was found to be associated with SLE. In paper one, we performed a thorough study and confirmed its association to SLE. In addition, we found a few other SNPs in the gene that were associated to the disease. Among them, SNP rs2004640 is very strongly associated and was found to affect the splicing of the gene. Another SNP, rs2280714, correlated with overexpression of the gene, although SNP rs10954213 was much more highly correlated with expression adding to this, in paper two we found a few other SNPs that were associated to SLE and played crucial roles in gene function. An indel in exon 6, though not associated by itself, regulated which isoforms were expressed. Individuals with 2 repeats expressed isoforms V1 and V4, while individuals with 4 repeats expressed isoforms V5 and V6. SNP rs2070197 was also very strongly associated, but did not have a functional role. In paper three, the same polymorphisms were studied in a Mexican population, which showed an even stronger association when compared to a European population.</p><p>It is known that autoimmune diseases share susceptibility genes, therefore we wanted to see if the IRF5 gene is associated with any other autoimmune diseases. In papers four and five, we tested its association to RA (using three sets of patients and controls from Sweden, Argentina and Spain) and psoriasis (using a set of patients and controls from Sweden). Association was not found in either of the diseases. Therefore, we believe that this association may be SLE-specific.</p>

Systemic lupus erythematosus (SLE) is a complex autoimmune disease with unknown etiology. The aim of this thesis was to identify susceptibility regions through genetic mapping, using model-based linkage analysis on nuclear and extended SLE multicase families. In the first paper we performed a genome scan on 19 genetically homogenous Icelandic and Swedish families. One region at 2q37 was identified with a significant linkage with contribution from both populations (Z=4.24). Five other regions 2q11, 4p13, 9p22, 9p13 and 9q13 showed suggestive linkage (Z&gt;2.0). In the second paper, 87 families from 10 different countries were analysed only for chromosome 1. One region at 1q31 showed significant linkage (Z=3.79) with contribution from families from all populations, including Mexicans and Europeans. Four other regions 1p36, 1p21, 1q23, and 1q25, showed levels of suggestive linkage. Linkage for most regions was highly dependent on what population was used, which indicated strong genetic heterogeneity in the genetic susceptibility for SLE. In the two last papers, we used the positional candidate gene strategy, in order to investigate candidate genes in two regions linked to SLE. For the Bcl-2 gene (at 18q21) we could not detect any association with SLE using three different markers. However, when we investigated the tightly linked low-affinity family of FcγR genes (at 1q23), we could find association for two risk alleles in the FcγRIIA and FcγRIIIA genes. The risk alleles were transmitted to SLE patients on one specific haplotype and therefore are not independent risk alleles. The results show that model-based linkage analysis is a strong approach in the search for susceptibility genes behind complex diseases like SLE.