In patients with type 2 diabetes and chronic kidney disease, sodium-glucose cotransporter-2 inhibitors lower the risk of kidney-related complications by 33% compared to placebo, and this reduction is...
Mechanism
Synthesis from 1 study
SGLT2 inhibitors protect the kidneys by lowering pressure inside the kidney's filters and reducing harmful oxidative stress. This stops the filters from getting damaged and slows down kidney decline. Other drugs help too, but they don't reduce pressure inside the filters as effectively.
Most probable mechanism
By blocking sugar and salt reabsorption in the kidney, SGLT2 inhibitors cause more salt and water to be flushed out, which lowers pressure inside the kidney's filtering units. This reduces damage to the filters, decreases harmful oxidative stress, and prevents the kidney from being overworked, leading to slower decline in kidney function.
Sodium-glucose cotransporter 2 in the proximal tubule is inhibited, reducing reabsorption of glucose and sodium
Increased sodium delivery to the macula densa activates tubuloglomerular feedback, causing afferent arteriole constriction
Afferent arteriole constriction reduces intraglomerular pressure and glomerular hyperfiltration
Lower intraglomerular pressure decreases mechanical stress on podocytes and the glomerular basement membrane
Reduced hyperglycemia and improved metabolic efficiency lower mitochondrial reactive oxygen species production in renal cells
Decreased oxidative stress and mechanical strain reduce inflammation, fibrosis, and podocyte loss
Preserved glomerular filtration barrier integrity slows decline in glomerular filtration rate and reduces proteinuria
Less supported by current evidence, but not ruled out
Blocking a hormone receptor in the kidney reduces inflammation and scar tissue formation, which helps protect kidney structure and function.
Mineralocorticoid receptors in renal tubular and glomerular cells are blocked
Inhibition of NF-kB and other pro-inflammatory signaling pathways reduces cytokine production
Downregulation of fibrotic genes decreases collagen and extracellular matrix deposition in the tubulointerstitium
Reduced fibrosis and inflammation improve glomerular filtration barrier integrity
Activating a receptor on blood vessel walls improves blood flow and reduces inflammation, which may help protect organs including the kidneys.
GLP-1 receptors on endothelial cells and macrophages are activated
cAMP/PKA signaling increases nitric oxide production, enhancing vasodilation
Suppression of TNF-alpha and IL-6 reduces systemic and vascular inflammation
Improved endothelial function reduces microvascular stress in renal capillaries
Evidence from Studies
Supporting (1)
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