Mechanisms of progression of chronic kidney disease

Area of Science:

• Nephrology
• Pathology
• Internal Medicine

Background:

• Chronic kidney disease (CKD) affects all ages, including children.
• CKD is characterized by progressive kidney scarring regardless of the initial cause.
• Fibrosis progression is thought to stem from a self-perpetuating cycle initiated by kidney injury.

Purpose of the Study:

• To review mechanisms driving progressive renal damage in CKD.
• To explore factors contributing to tubulointerstitial fibrosis independent of glomerulosclerosis.
• To discuss potential CKD predispositions, including genetic factors and low nephron number.

Main Methods:

• Literature review of mechanisms in CKD progression.
• Analysis of factors contributing to renal fibrosis.
• Examination of systemic and glomerular hypertension, cytokines, growth factors, RAAS, podocyte loss, dyslipidemia, and proteinuria.

Main Results:

• Progressive renal scarring is a hallmark of CKD.
• Multiple factors contribute to CKD progression, including hemodynamic and molecular pathways.
• Specific mechanisms of tubulointerstitial fibrosis and predisposing factors are identified.

Conclusions:

• Understanding the vicious cycle of fibrosis is crucial for managing CKD.
• Targeting pathways like the renin-angiotensin-aldosterone system (RAAS) may slow CKD progression.
• Genetic factors and nephron number are important considerations in CKD pathogenesis.