Provided herein are methods for the treatment of Alport syndrome, using a modified oligonucleotide targeted to miR-21. In certain embodiments, the modified oligonucleotide targeted to miR-21 improves kidney function and/or reduces fibrosis in subjects having Alport syndrome. In certain embodiments, administration of the modified oligonucleotide targeted to miR-21 delays the onset of end-stage renal disease in a subject having Alport syndrome. In certain embodiments, the modified oligonucleotide targeted to miR-21 delays the need for dialysis or kidney transplant in a subject having Alport syndrome.