KIDNEY DISEASES AND THEIR PATHOGENESIS: A SCIENTIFIC OVERVIEW

Аннотация

Kidney diseases encompass a broad spectrum of disorders affecting the structure and function of the kidneys. Understanding the pathogenesis of these diseases is essential for effective diagnosis, treatment, and prevention. This article reviews common kidney diseases, including glomerulonephritis, diabetic nephropathy, and chronic kidney disease (CKD), and discusses the molecular and cellular mechanisms underlying their development and progression. Keywords: Kidney diseases, pathogenesis, glomerulonephritis, chronic kidney disease, nephropathy, renal failure, inflammation, fibrosis 1. Introduction Kidneys play a vital role in maintaining homeostasis by filtering blood, regulating electrolytes, and eliminating waste. Pathological changes in the kidneys can lead to impaired function, ultimately resulting in renal failure. Kidney diseases may be acute or chronic, with diverse etiologies and pathophysiological mechanisms. 2. Classification of Kidney Diseases Kidney diseases are commonly classified into: Glomerular diseases: Affect the glomeruli, such as glomerulonephritis. Tubulointerstitial diseases: Affect tubules and interstitium, including interstitial nephritis. Vascular diseases: Affect renal blood vessels, e.g., hypertensive nephrosclerosis. Cystic kidney diseases: Genetic disorders like polycystic kidney disease. 3. Pathogenesis of Kidney Diseases 3.1 Immune-Mediated Injury Glomerulonephritis involves immune complex deposition in glomeruli, activating complement pathways and inflammatory cells that damage the filtration barrier. 3.2 Metabolic Factors Diabetic nephropathy arises due to chronic hyperglycemia causing advanced glycation end-products (AGEs) accumulation, oxidative stress, and activation of pro- fibrotic pathways, leading to glomerulosclerosis and tubulointerstitial fibrosis. https://scientific-jl.com 2 0 0 45-son_4-to’plam_May -2025 ISSN:3030-3621 Ta'lim innovatsiyasi va integratsiyasi 3.3 Hemodynamic Changes Hypertension and hyperfiltration damage glomerular capillaries, increasing permeability and proteinuria, which further promote inflammation and fibrosis. 3.4 Cellular and Molecular Mechanisms Persistent injury stimulates mesangial cell proliferation, extracellular matrix deposition, and cytokine release (e.g., TGF-β, TNF-α), driving fibrosis and scarring. 4. Clinical Implications Understanding pathogenesis informs therapeutic strategies such as immunosuppressive treatment for immune-mediated diseases and tight glycemic and blood pressure control in diabetic nephropathy and hypertensive nephrosclerosis, respectively. 5. Conclusion Kidney diseases result from complex interactions of immune, metabolic, and hemodynamic factors that disrupt normal renal architecture and function. Advances in understanding their pathogenesis provide opportunities for improved management and outcomes.