A 25-year-old woman has been suffering from diabetes mellitus since she was 9. She was admitted into the nephrology unit with significant edemas of the face, arms, and legs. Blood pressure 200/110 mm Hg, Hb 90 g/L, blood creatinine-850 mcmol/L, the daily amount of urine is decreased 200 ml, urine proteins 1.0 g/L, leukocytes - 10-15 in the vision field. Glomerular filtration rate - 10 mL/min. What tactics should the doctor choose?