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Role of vitamin D in chronic kidney disease

Tejas V Patel1, Ajay K Singh

  • 1Renal Division, Brigham and Women's Hospital, Boston, MA 02115, USA. tvpatel@partners.org

Seminars in Nephrology
|April 18, 2009
PubMed

Insights

Vitamin D receptor activators may reduce cardiovascular deaths in chronic kidney disease patients. These agents suppress parathyroid hormone with a lower risk of high calcium and phosphate levels, offering potential cardiovascular benefits.

Area of Science:

  • Nephrology and Endocrinology
  • Cardiovascular Medicine
  • Nutritional Science

Background:

  • Declining renal function is strongly linked to increased cardiovascular mortality, a risk not fully explained by traditional factors.
  • Activated vitamin D has potential benefits beyond parathyroid hormone (PTH) suppression but carries risks of hypercalcemia and hyperphosphatemia in chronic kidney disease (CKD).
  • Emerging research highlights new vitamin D regulatory pathways involving fibroblast growth factor-23 (FGF-23) and klotho.

Purpose of the Study:

  • To review the role of vitamin D and its analogs in managing chronic kidney disease.
  • To explore the cardiovascular implications of vitamin D receptor activators (VDRAs) in CKD patients.
  • To discuss the potential benefits of VDRAs, such as paricalcitol, in mitigating cardiovascular mortality.

Main Methods:

  • Review of recent animal and preliminary human studies on vitamin D receptor activators.
  • Analysis of evidence linking VDRA use to cardiovascular outcomes in CKD.
  • Examination of novel vitamin D regulatory pathways (FGF-23, klotho).

Main Results:

  • Vitamin D receptor activators show promise in suppressing PTH with a reduced risk of hypercalcemia and hyperphosphatemia compared to activated vitamin D.
  • Preliminary evidence suggests VDRAs may be associated with a lower risk of cardiovascular disease deaths in CKD patients, independent of PTH levels.
  • New insights into FGF-23 and klotho pathways are advancing the understanding of vitamin D metabolism and function.

Conclusions:

  • Vitamin D receptor activators represent a promising therapeutic strategy for CKD patients, potentially improving cardiovascular outcomes.
  • Further mechanistic investigations and large-scale randomized controlled trials are necessary to confirm these findings and optimize treatment.
  • Understanding the complex interplay of vitamin D, FGF-23, klotho, and cardiovascular health is crucial for future therapeutic development.

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