THE ROLE OF OBESITY (AND WEIGHT LOSS THROUGH BARIATRIC SURGERY) IN AUTOIMMUNE DISEASES / O PAPEL DA OBESIDADE (E DA PERDA DE PESO PELA CIRURGIA BARIÁTRICA) NAS DOENÇAS AUTOIMUNES

Introdução : A obesidade tem sido associada ao aparecimento ou agravamento de doenças autoimunes. Objetivo : Rever a presença de autoanticorpos em pacientes obesos submetidos à cirurgia bariátrica e verificar a possível alteração deste perfil após o procedimento cirúrgico. Método : Revisão narrativa da literatura realizada no PubMed e Scielo. A busca utilizou as palavras-chave: " obesidade, autoimunidade, fator antinuclear, cirurgia bariátrica ". Os critérios de inclusão compreenderam artigos de revisão, estudos experimentais, pesquisas pré-clínicas e clínicas, escritos em português e inglês e disponíveis em texto completo. Resultado : foram incluídos 63 artigos. Conclusão : Existe alta prevalência de FAN positivo na população obesa e candidata à cirurgia bariátrica, que diminui consideravelmente no pós-operatório. O mesmo não pode ser verificado com fator reumatoide, anticorpos ENA e anti-ds DNA, anticorpos IgG e IgM anticardiolipina e anticorpos antiendomísio. Nenhuma variável clínica ou antropométrica pôde ser associada à presença de autoanticorpos, exceto os níveis de vitamina D, que foram significativamente mais baixos nos indivíduos pré-operatórios e ANA-positivos.

Introdução : A obesidade tem sido associada ao aparecimento ou piora de doenças autoimunes. Objetivo : Revisar a presença de autoanticorpos em obesos submetidos à cirurgia bariátrica e verificar a possível alteração deste perfil após o procedimento cirúrgico. Método : Revisão narrativa da literatura efetuada no PubMed e Scielo. A busca utilizou as palavras-chave: " obesidade, autoimunidade, fator antinuclear, cirurgia bariátrica" . Os critérios de inclusão compreenderam artigos de revisão, estudos experimentais, pesquisas pré-clínicas e clínicas, escritos em português e inglês e disponíveis em texto completo. Resultado : Foram incluídos 63 artigos. Conclusão : Existe alta prevalência de FAN positiva na população obesa e candidata à cirurgia bariátrica que diminui consideravelmente no pós-operatório. O mesmo não pode ser verificado com o fator reumatóide, anticorpos do perfil ENA e anti-ds DNA, anticorpos anticardiolipina IgG e IgM, e anticorpos anti-endomísio. Nenhuma variável clínica ou antropométrica pôde estar ligada à presença de autoanticorpos, salvo níveis de vitamina D que foram significativamente menores nos indivíduos no pré-operatório e FAN positivos.

[Comparative assessment of sensitivity and specificity of three variants of classification criteria for systemic lupus erythematosus in a cohort of Russian patients].

BACKGROUND: The clinical and serologic heterogeneity of systemic lupus erythematosus (SLE) presents challenges for diagnosis, particularly in the earliest stages of the disease when there are insufficient signs to make a reliable diagnosis. AIM: To make a comparative assessment of sensitivity and specificity of various classification criteria of SLE on a cohort of patients of Nasonova Research Institute of Rheumatology. MATERIALS AND METHODS: A total of 252 patients were included in the study; 152 (60%) of 252 patients had reliable SLE (mean age 36 [29.5-46] years, duration of disease 9 [3.4-19] years). Of 252 patients, 26 (11%) had PAPS (mean age 36.5 [31-42] years, duration of disease 4.6 [1-10.4] years). Systemic sclerosis was diagnosed in 74/252 (29%) patients, (mean age 51.5 [42-59] years, duration of disease 9 [5-16] years). The quality of the classification function of the criteria was assessed by ROC analysis. RESULTS: SLE was diagnosed in 131 (86%) of 152 patients using the American College of Rheumatology - ACR)-1997 criteria, in 145 (95%) using the The Systemic Lupus International Collaborating Clinics (SLICC) 2012 criteria, and in 144 (94.7%) using the European League Against Rheumatism (EULAR)/ACR 2019 criteria. ANF positivity was the least statistically significant of all signs in relation to the diagnosis of SLE. The area under the curve (AUC) for ANF≥1/160 titers was AUC 0.654 for the ACR-97 criteria, AUC 0.616 for the SLICC-12 SLE criteria, and AUC 0.609 for the 2019 EULAR/ACR criteria. ROC analysis of the relationship between the number of criteria/points and a reliable diagnosis of SLE revealed a high diagnostic accuracy - the AUC for all SLE criteria was greater than 0.940. In the ROC analysis of patients with SLE and PAFS, indicating the number of diagnostic criteria, sensitivity was 86% for ACR-1997, 95% for SLICC-2012, 95% for EULAR/ACR 2019, and specificity was 100, 62 and 62%, respectively. CONCLUSION: The classification criteria SLICC-2012 and EULAR/ACR 2019 are more sensitive for the diagnosis of SLE in the Russian population, and the criteria ACR-1997 are more specific. All three variants of the SLE classification criteria have sufficient sensitivity and specificity for their use in real clinical practice.

[Sjogren's disease/syndrome in combination with autoimmune liver damage. 20-years observation]. / Bolezn'/sindrom Shegrena v sochetanii s autoimmunnym porazheniem pecheni. 20-letnee nablyudenie.

Sjogren's disease (BS) is a systemic autoimmune disease, the main symptoms of which are associated with dry eyes, mouth, skin, respiratory and gastrointestinal tract, etc., but there are a large number of extra-vascular symptoms that can accompany this disease: weakness, swelling of the lymph nodes, respiratory failure, pain and swelling of the joints, rash, dysphagia, gastro-esophageal reflux, lymphoma, etc. In addition, the etiology of this disease remains unknown, and the pathogenesis is partially studied. The diagnosis of Sjogren's disease is complicated by a variety of clinical manifestations, as well as subacute and chronic variants of the course of the disease, in addition, the diagnostic criteria are periodically changed. It is recommended to adhere to the domestic diagnostic criteria considering the presence of laboratory signs of an autoimmune disease. The article presents a clinical observation of a patient with the development of the main symptoms and signs of BS and autoimmune hepatitis for 20 years. Recurrent mumps or chronic bilateral enlargement of the parotid salivary glands may be the first symptom of Sjogren's disease, which is recommended to extend the examination in order to identify other, sometimes latent signs of the disease.

Antinuclear Autoantibodies in Health: Autoimmunity Is Not a Synonym of Autoimmune Disease.

The incidence of autoimmune diseases is increasing. Antinuclear antibody (ANA) testing is a critical tool for their diagnosis. However, ANA prevalence in healthy persons has increased over the last decades, especially among young people. ANA in health occurs in low concentrations, with a prevalence up to 50% in some populations, which demands a cutoff revision. This review deals with the origin and probable physiological or compensatory function of ANA in health, according to the concept of immunological clearance, theory of autoimmune regulation of cell functions, and the concept of functional autoantibodies. Considering ANA titers ≤1:320 as a serological marker of autoimmune diseases seems inappropriate. The role of anti-DFS70/LEDGFp75 autoantibodies is highlighted as a possible anti-risk biomarker for autoimmune rheumatic disorders. ANA prevalence in health is different in various regions due to several underlying causes discussed in the review, all influencing additive combinations according to the concept of the mosaic of autoimmunity. Not only are titers, but also HEp-2 IFA) staining patterns, such as AC-2, important. Accepting autoantibodies as a kind of bioregulator, not only the upper, but also the lower borders of their normal range should be determined; not only their excess, but also a lack of them or "autoimmunodeficiency" could be the reason for disorders.

Curso de reumatologia: aula 1: significado clínico do FAN anticorpos antinucleares / Course of rheumatology: class 1: clinical significance of antinuclear antibodies ANA

A utilização de células HEp-2 na detecção dos anticorpos antinucleares (FAN-HEp-2) constituiu-se em grande avanço metodológico. Como consequência, o teste tornou-se muito sensível, porém com diminuição da especificidade, fato comprovado pelo crescente número de exames positivos em indivíduos sabidamente hígidos. O objetivo deste artigo é fazer uma abordagem sobre os pontos importantes, para correta valorização dos achados do teste de FAN, que possa auxiliar o clínico na exata identificação de pacientes com doenças autoimunes, particularmente o lúpus eritematoso sistêmico. Os autores discutem a importância do título e do padrão na interpretação de um FAN positivo. Discutem também os possíveis significados do teste positivo em pacientes sem evidências objetivas de doenças imunológicas.

Antinuclear antibody (ANA) tests are frequently used to screen patients for chronic inflammatory diseases such as lupus erythematosus (SLE). However, the methodological advances have brought up a considerable improvement in the test's sensitivity and consequently a decrease in its specificity. This has resulted in an increasing number of positive tests in apparently healthy subjects. The present article brigs an approach on the most important points to be considered in the analyses and evaluation of an ANA test, like titer and immunofluorescence pattern of a positive test. Those points are importants parameters in the evaluation of the significance of a positive ANA-HEp-2 test that might help the identification of patients with autoimmune disease. Also, it is important to consider the possible and alternative significance of a positive ANA test in patients without objective evidence of autoimmune diseases.