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Uremic Toxicity and Bone in CKD
Suguru Yamamoto1,2, Masafumi Fukagawa3
1Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
Journal of Nephrology
|June 3, 2017
Summary
Patients with chronic kidney disease (CKD) face high fracture risks due to bone abnormalities and impaired bone quality. Managing CKD-mineral and bone disorder (CKD-MBD) and uremic osteoporosis is crucial for preventing bone fragility.
Area of Science:
- Nephrology
- Orthopedics
- Biochemistry
Background:
- Chronic kidney disease (CKD) elevates fracture risk, particularly in dialysis patients.
- CKD-mineral and bone disorder (CKD-MBD) involves secondary hyperparathyroidism and skeletal resistance to parathyroid hormone (PTH).
- Uremic toxins impair osteoblast function and reduce bone strength and quality.
Purpose of the Study:
- To review the impact of CKD on bone health and explore therapeutic interventions.
- To highlight the concept of uremic osteoporosis as a cause of bone fragility in CKD.
- To discuss the potential of AST-120 and other treatments in managing CKD-related bone abnormalities.
Main Methods:
- Review of existing literature on CKD-MBD, bone metabolism, and therapeutic strategies.
- Analysis of studies on uremic toxins' effects on bone cells and bone quality.
- Examination of preclinical data, including a rat model of kidney damage and bone changes.
Main Results:
- CKD significantly impairs bone strength and quality, leading to increased fracture risk.
- Uremic toxins like indoxyl sulfate and p-cresyl sulfate disrupt PTH signaling in osteoblasts.
- AST-120 demonstrated improvement in CKD-induced bone abnormalities by reducing indoxyl sulfate levels.
Conclusions:
- Uremic osteoporosis is a key factor in CKD-related bone fragility.
- Effective management of CKD-MBD and uremic osteoporosis is essential for preventing fractures.
- Further research on anti-osteoporotic drugs and interventions like AST-120 is needed for CKD patients.
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