Репозиторий Университета

© 2018 S. Karger AG.All right reserved. We present a clinical case of a 34 years old female patient who simultaneously developed two rare conditions: microscopic polyangiitis and atypical hemolytic uremic syndrome (aHUS) associated with a polymorphism in diacylglycerol kinase-ε gene (DGKE), which seems to be the first case of aHUS associated with DGKE mutation in an adult patient. We suggest that the patient experienced chronic subclinical course of thrombotic microangiopathy (TMA) since adolescence, because persistent proteinuria and slowly progressive chronic kidney disease were first found when she was at the age of 13. She developed ANCA-associated vasculitis at the age of 34 with dialysis-dependent renal failure and alveolar hemorrhage that were accompanied by an acute episode of TMA. Treatment with high-dose of corticosteroids, cyclophosphamide and plasmapheresis was initiated. Alveolar hemorrhage have been resolved. However, severe hypertension, hemolytic anemia and thrombocytopenia persisted despite treatment. Plasma resistance was considered to be an indication for treatment with eculizumab, which proved to be beneficial. However, kidney function did not recover. Possible interactions between complement system, DGKE and their possible role in the pathogenesis of TMA are discussed.

© 2018 Media Sphera Publishing Group. All rights reserved. Objective. To compare the frequency, clinical features and outcomes of renal involvement in ANCA-associated vasculitides (AAV) in patients with antibodies against proteinase-3 (pr3-ANCA) and myeloperoxidase (MPO-ANCA). Materials and methods. In our retrospective study we enrolled 264 patients, 94 males and 170 females, median age 53 [36; 62] years. Among them 157 were pr3-ANCA positive and 107 were MPO-ANCA positive. AAV was diagnosed according to ACR criteria and Chapel Hill consensus conference definition (2012). Median follow up was 44 [18; 93] months. We assessed baseline BVAS and VDI by the end of the follow up. Serum creatinine (sCr), estimated glomerular filtration rate (EGFR), hematuria and daily proteinuria were estimated. Diagnosis and stage of chronic kidney disease (CKD) and acute kidney injury (AKI) were established according to KDIGO guidelines (2012) and Scientific Society of Russian Nephrologists (2016). Results. Renal involvement was present in 181 (68.6%) patients, and its frequency was similar in pr3-ANCA and MPO-ANCA subgroups. Patients with MPO-ANCA developed rapidly progressive glomerulonephritis and hypertension significantly more often than patients with pr3-ANCA: 50.7% vs 35.6% (p=0.049) and 46.1% vs 29.8% (p=0.029) respectively. At disease onset, median sCr was significantly higher and EGFR was significantly lower in patients with MPO-ANCA (p<0.05). 1-year and 5-year renal survival rates were similar in pr3-ANCApositive (93.9% and 87.4% respectively) and MPO-ANCA positive patients (87.4% and 83.1% respectively). Median BVAS and VDI scores were significantly higher in pr3-ANCA subgroup. The number of patients who developed AAV relapse during 1-year follow up was also significantly higher in pr3-ANCA subgroup. The frequency of eye and ENT involvement was significantly higher in pr3-ANCA positive patients than in MPO-ANCA-positive patients. Conclusions: The frequency of extrarenal manifestations, clinical features of renal involvement and relapse rate are associated with AAV serotype.

© 2018 Media Sphera Publishing Group. All rights reserved. Aim. To evaluate clinical features and outcomes of renal involvement in patients with microscopic polyangiitis (MPA). Materials and methods: We enrolled 99 patients with MPA, diagnosed in accordance with the algorithm of the European Medicines Evaluation Agency (EMEA) and the Chapel Hill consensus conference definition (2012). Serum creatinine (sCr), estimated glomerular filtration rate (EGFR), hematuria and proteinuria were estimated. Frequency of rapidly progressive renal failure (a twofold increase in the sCr level in ≤3 months) was regarded as the clinical equivalent of rapidly progressive glomerulonephritis (RPGN). Results and discussion. Renal involvement was present in 92 (92.9%) patients. RPGN developed in 51 (55,4%) patients. The most common features of kidney involvement were hematuria and subnephrotic proteinuria. Arterial hypertension was revealed in 32 (34.7%) patients and was associated with RPGN (p<0.004). End-stage renal disease (ESRD) developed in 11 (11.9%) patients. Despite effective induction therapy disease relapses occurred in 20 (21.1%) patients during the 1st year, including renal relapses in 12 (13.3%) cases. During 5-year follow up 34 (37.1%) patients developed disease relapses, including renal relapses in 22 (24.4%) patients. Conclusion. Renal involvement is one of the most common manifestations of MPA with a high frequency of RPGN. More than one third of patients develop disease relapses despite adequate therapy.

© 2018 Media Sphera Publishing Group. All rights reserved. Systemic vasculitis is a heterogeneous group of inflammatory diseases, which are classified according to the diameter of the affected vessels. The treatment of systemic vasculitis is no longer empirical, because of increasing number of randomized clinical trials in this field. In recent years, there was a trend to limit the cumulative dose of glucocorticosteroids and immunosuppressive drugs, partially through biological drugs usage. However, biologic therapy is not always superior to combination of glucocorticosteroids and cytotoxic drugs. The efficacy of different biologic drugs varies in patients with different forms of systemic vasculitis, which creates the ground for personalized therapy of these diseases. Another serious problem is the absence of strict criteria to immunosuppressive therapy intensification, especially in vasculitis, affecting large vessels, due to the lack of reliable laboratory markers of disease activity. The article reviews modern approaches to the treatment of some types of systemic vasculitis, including ANCA-associated vasculitides, giant cell arteritis, Takayasu`s arteritis and cryoglobulinemic vasculitis.