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Stages of Diabetic Nephropathy

Stage-by-stage progression of diabetes-related kidney damage.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dahiliye (İç Hastalıkları) department. Book Appointment →

What is Stages of Diabetic Nephropathy?

Diabetic nephropathy is a major microvascular complication of diabetes resulting from chronic hyperglycemia's adverse effects on the glomerular mesangium, basement membrane, and podocytes. It is the leading cause of end-stage renal disease in developed countries.

The Mogensen classification divides it into five stages: stage 1 (hyperfiltration), stage 2 (silent), stage 3 (microalbuminuria), stage 4 (macroalbuminuria), and stage 5 (uremia). GFR may be elevated in early stages and progressively declines in advanced stages.

Pathogenesis involves advanced glycation end products (AGEs), polyol-pathway activation, protein kinase C activation, oxidative stress, and intraglomerular hypertension. Renin-angiotensin system blockade is the cornerstone of treatment.

Symptoms

Asymptomatic in early stages
Microalbuminuria (30-300 mg/g)
Macroalbuminuria (>300 mg/g)
Hypertension
Peripheral edema
Decline in GFR
Uremic findings (advanced stage)
Concurrent diabetic retinopathy

Risk Factors

Long-standing diabetes (especially type 1 >5 years)
Poor glycemic control (high HbA1c)
Hypertension
Dyslipidemia
Smoking
Family history of nephropathy
Male sex
African-American, Hispanic, and Asian ancestry

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Annual microalbuminuria screening from time of diabetes diagnosis
  • New-onset hypertension
  • Peripheral edema
  • Foamy urine
  • Decline in GFR
  • Proteinuria together with retinopathy

Treatment Methods

01
Strict glycemic control (HbA1c <7%)
02
ACE inhibitors or ARBs (when microalbuminuria present)
03
Blood pressure control (<130/80 mmHg)
04
SGLT2 inhibitors (empagliflozin, dapagliflozin)
05
GLP-1 receptor agonists
06
Finerenone (mineralocorticoid receptor antagonist)
07
Dietary protein and sodium restriction
08
Dialysis and transplantation in end-stage disease

Which Department to Visit?

You can visit our Dahiliye (İç Hastalıkları) department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.