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The next generation of diabetic nephropathy therapies: an update
Mark E Williams1, Katherine R Tuttle
1Joslin Diabetes Center, Boston, MA 02215, USA.
Abstract:
Although treatments for diabetic kidney disease are available, many patients still have progressive disease. More effective therapies are urgently needed. Novel agents currently under evaluation in clinical trials are described in this review. Sulodexide, a mixture of three glycosaminoglycans, appears to prevent diabetic nephropathy in experimental models by ameliorating abnormalities in the glomerular basement membrane and mesangial matrix. Pyridoxamine is an inhibitor of advanced glycation end-product (AGE) formation derived from vitamin B(6). Alagebrium is an AGE cross-link breaker. AGEs injure the kidneys and other vascular targets by mechanisms such as oxidative stress, inflammation, and protein cross-linking, among others. By inhibiting AGE formation or breaking AGE cross-links, experimental models have demonstrated kidney protection. Ruboxistaurin is an inhibitor of protein kinase C beta (PKC-beta), a mediator of signal transduction that leads to cell growth, fibrosis, and tissue injury. In diabetes, PKC-beta is up-regulated and activated in the kidney. Ruboxistaurin prevents diabetic kidney disease in animal models. These agents have appeared promising (by reduction of albuminuria and preservation of kidney function) in phase II studies. To determine whether clinical outcomes (mortality, renal, and cardiovascular events) are improved beyond the current standard of care, phase III trials are planned.
Insights
New therapies are being investigated to combat progressive diabetic kidney disease. Agents targeting advanced glycation end-products (AGEs) and protein kinase C beta (PKC-beta) show promise in early trials.
Area of Science:
- Nephrology
- Endocrinology
- Pharmacology
Background:
- Diabetic kidney disease (DKD) remains a significant health concern, with many patients experiencing disease progression despite current treatments.
- There is an urgent need for more effective therapeutic strategies to manage DKD and prevent its complications.
Purpose of the Study:
- This review focuses on novel therapeutic agents currently under evaluation in clinical trials for diabetic kidney disease.
- The aim is to present promising new treatments that could offer improved outcomes for patients with DKD.
Main Methods:
- The review discusses agents like sulodexide, pyridoxamine, alagebrium, and ruboxistaurin.
- Mechanisms of action include ameliorating glomerular basement membrane abnormalities, inhibiting advanced glycation end-product (AGE) formation, breaking AGE cross-links, and inhibiting protein kinase C beta (PKC-beta).
- Experimental models and early-phase clinical trial data (Phase II) are considered.
Main Results:
- Sulodexide demonstrated potential in preventing diabetic nephropathy in experimental models.
- Pyridoxamine and alagebrium showed kidney protection in experimental models by targeting AGEs.
- Ruboxistaurin prevented diabetic kidney disease in animal models by inhibiting PKC-beta.
- Phase II studies indicated these agents are promising, showing reductions in albuminuria and preservation of kidney function.
Conclusions:
- Novel agents targeting AGEs and PKC-beta pathways have shown promise in preclinical and early clinical studies for diabetic kidney disease.
- Further Phase III trials are planned to confirm the efficacy of these agents in improving clinical outcomes, including mortality and cardiovascular events, beyond the current standard of care.
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