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Bone morphogenetic protein-7 and connective tissue growth factor: novel targets for treatment of renal fibrosis?
Tri Q Nguyen1, Roel Goldschmeding
1Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands.
Abstract:
Renal fibrosis is the major determinant in progression of kidney disease and results from an inappropriate response to acute and chronic kidney injury. Transforming growth factor (TGF)-beta1 is the driving force behind renal fibrosis and has since long been regarded as the key factor to be targeted in prevention and treatment of renal fibrosis. Despite the impressive results obtained in experimental renal fibrosis, TGF-beta1 blockade has not yet translated into an effective and safe therapeutic in human patients. Therefore, it remains important to explore the role of additional growth factors which are involved in renal regeneration and fibrosis. Recently, bone morphogenetic protein (BMP)-7 and connective tissue growth factor (CTGF) have both emerged as novel modulators of profibrotic TGF-beta1 activity. The expression of BMP-7 is decreased in various models of renal disease, while CTGF is strongly upregulated in experimental and human renal fibrosis. In experimental kidney injury, administration of BMP-7 or inhibition of CTGF have been sufficient to result in striking improvement of renal function and structure. This review summarizes the current knowledge of BMP-7 and CTGF in the kidney, and discusses their therapeutic potential in renal fibrosis.
Insights
Transforming growth factor-beta1 (TGF-β1) is key in kidney fibrosis, but its blockade is not effective in humans. Bone morphogenetic protein-7 (BMP-7) and connective tissue growth factor (CTGF) show promise for treating kidney fibrosis.
Area of Science:
- Nephrology
- Fibrosis Research
- Regenerative Medicine
Background:
- Renal fibrosis, a key factor in kidney disease progression, arises from kidney injury.
- Transforming growth factor-beta1 (TGF-β1) is a primary driver of renal fibrosis, but TGF-β1 blockade has failed in human trials.
- Exploring alternative therapeutic targets is crucial for managing kidney fibrosis.
Purpose of the Study:
- To review the roles of bone morphogenetic protein-7 (BMP-7) and connective tissue growth factor (CTGF) in renal fibrosis.
- To discuss the therapeutic potential of BMP-7 and CTGF in kidney disease.
Main Methods:
- Literature review of studies on BMP-7 and CTGF in renal fibrosis models and human patients.
- Analysis of growth factor expression patterns in kidney injury.
Main Results:
- BMP-7 expression decreases in renal disease, while CTGF expression increases.
- BMP-7 administration or CTGF inhibition improves renal function and structure in experimental models.
- BMP-7 and CTGF are identified as novel modulators of TGF-β1 activity.
Conclusions:
- BMP-7 and CTGF represent promising therapeutic targets for renal fibrosis.
- Further research into BMP-7 and CTGF could lead to effective treatments for kidney disease.
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