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The choice of treatment of mesangial proliferative glomerulonephritis (post-infection, immunoglobulin A, G and M nephritis) is performed taking into account the remission achievement, slowing of progression and reduction of the risk of recurrences of glomerulonephritis. The efficiency of etiologic factor removing is debatable: glomerulonephritis associated with infections usually resolves after their elimination; individual patients achieve immunoglobulin A nephritis remission with persistent antimicrobial treatment of focal infection, but surgical removal of the focus (tonsillectomy) does not affect the long-term prognosis, therefore it is not recommended. Treatment of immunoglobulin A nephritis with oral prednisone for up to 4 months, sometimes in combination with cyclophosphamide (cyclophosphane), reduces the likelihood of its relapse. At low risk of progression of immunoglobulin A nephritis with proteinuria less than 1 g/day, long-term therapy with angiotensin-converting enzyme inhibitors or angiotensin receptor blockers is indicated with administration of maximum tolerated doses for proteinuria more than 1 g/day. Also fish oil 3 g/day is administered for up to 2 years. If proteinuria more than 1 g/day persists for 3-6 months, corticosteroids are recommended for 6 months. With mild renal dysfunction, corticosteroids are prescribed orally or in pulse-therapy with high doses intravenously and maintenance therapy with low doses orally. Immunosuppressive therapy - cyclophosphamide, cyclosporine, azathioprine, mycophenolate mofetil - in combination with corticosteroids is indicated in rapid loss of renal function or massive/moderate proteinuria. In minimal proteinuria immunosuppressive therapy is considered to be unreasonable. Use of intravenous immunoglobulin for immunoglobulin A nephritis from the point of view of lesser toxic effect is possible only as the induction therapy. Currently, there are no clinical recommendations for the treatment of immunoglobulin M nephritis, in case of nephrotic syndrome, corticosteroids are the drugs of the 1st line. There are isolated studies of the use of cyclophosphamide, mycophenolate mofetil, and cyclosporine, with the achievement of remission in frequent relapses of nephrotic syndrome or steroid drug resistance. The cases of immunoglobulin M nephritis treates with retuximab with a positive effect are described. The effectiveness of immunoglobulin G nephritis treatment is less studied, the choice of treatment is similar to that of immunoglobulin A and M nephritis.

Aim. To assess the effect of immunosuppressive cyclophosphamide therapy and its regimens on the rate of progression of chronic kidney disease in mesangioproliferative glomerulonephritis. Methods. 72 patients with mesangioproliferative glomerulonephritis and indications for immunosuppressive therapy with disease activation were included in the comparative analysis: 56 patients received cyclophosphan in conventional doses (26 patients with daily or every other day, 30 patients with in pulse mode 1 time per month), and 16 patients did not receive cyclophosphan. Duration of the disease before observation ranged from 0 to 33.58 years, a median follow-up was 6.00 (interquartile range 1.6313.17) years, and after observation from 0 to 5 years with the median follow-up was 2.00 (1.003.50) years. The examination included nephrobiopsia with a morphological diagnosis, activity index/sclerosis, and glomerulonephritis progression rate for decreased glomerular filtration rate (ml/min/1.73 m per year). Results. The progression rate of chronic kidney disease was higher in the group of patients not receiving immunosuppressive therapy, 5.57 (3.277.95) ml/min/1.73 m2 per year compared with of the treated patients group, 3.05 (2.046.78) ml/min/1.73 m2 per year (p=0.040). There were no differences in the rate of decrease in glomerular filtration rate between groups depending on the treatment regimen: 4.86 (2.126.77) ml/min/1.73 m2 per year with regular and 3.67 (2.04 6.91) ml/min/1.73 m2 per year with a pulse mode (p=0.720). The rate of glomerulonephritis also did not differ significantly: 1.0 (1.02.0) and 2.0 (1.02.0) relapses over 5 years, respectively (p=0.691) in both treatment regimens. Conclusion. The treatment of patients with mesangioproliferative glomerulonephritis with cyclophosphane, in combination with prednisone or without it, regardless of the treatment regimen induces a slowdown in the progression of chronic kidney disease, improving the long-term prognosis and without affecting the frequency of relapses of the disease.

Aim. To investigate the prevalence, structure, and features of the course of chronic kidney disease (CKD) in patients with coronary heart disease (CHD) associated with comorbid diseases. Methods. The observation group consisted of 257 patients of the Interregional Clinical Diagnostic Center (Kazan) with coronary heart disease (20142018): 183 males and 74 females, aged from 38 to 95 years (mean age 61.80.6). Observation program: clinical examination; serum creatinine and lipid profiles, the albumin/creatinine ratio in a single portion of urine, morning urine osmolality, glomerular filtration rate estimated by the CKD-EPI; renal scintigraphy, ultrasonography of the kidneys, renal Doppler ultrasound and angiography. Chronic kidney disease was diagnosed if one of the criteria was met: the glomerular filtration rate 60 ml/min/1.73 m2 or the ratio of albumin to creatinine in urine (ACR) 30 mg/g. Statistical analysis was performed by using the methods of variational statistics: determination of the arithmetic mean (M), standard error of the mean (m) and difference significance according to the Student's test (t). Results. Examination of patients revealed the following comorbid diseases and syndromes: hypertension (90.7%), hyper- and dyslipidemia (96.5%), overweight/obesity (74.3%), diabetes mellitus (17.9%), chronic heart failure stages IIIa according to StrazheskoVasilenko classification (100%). 164 (63.8%) patients were first time diagnosed with chronic kidney disease: hypertensive nephropathy in 66.4%, ischemic renal disease in 21.9%, diabetic nephropathy in 2.4%, a combination of diabetic and hypertensive nephropathy in 9.3%. 51.2% of patients had stage 2 of chronic kidney disease, 42.1% stage 3, 6.7% stage 4 or 5. A feature of chronic kidney disease is its latent course (absence of complaints and clinical manifestations) and, as a consequence, unidentified diagnosis at the prehospital stage, which is generally characteristic of secondary nephropathies in cardiovascular diseases and these comorbid conditions. Conclusion. Chronic kidney disease was first diagnosed in 63.8% of patients with coronary heart disease with 1 to 5 comorbid diseases; a feature of chronic kidney disease is its secondary nature, the course of the disease is hidden by underlying and/or comorbid disease and, as a result, its late diagnosis.