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Related Experiment Videos

Calcium levels as a risk factor for delayed graft function.

Henk Boom1, Marko J K Mallat, Johan W de Fijter

  • 1Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands. boomh@rdgg.nl

Transplantation
|April 13, 2004
PubMed
Summary

High serum calcium levels independently increase the risk of delayed graft function (DGF) in kidney transplant recipients. Calcium channel blockers may offer protection against DGF.

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Area of Science:

  • Nephrology
  • Transplantation immunology
  • Calcium metabolism

Background:

  • Delayed graft function (DGF) affects up to 50% of renal transplants, impacting graft survival.
  • Hypercalcemia is linked to impaired renal function, but its specific effect on DGF is unclear.
  • Understanding factors influencing DGF is crucial for improving kidney transplant outcomes.

Purpose of the Study:

  • To investigate the association between serum calcium levels and the occurrence of DGF in cadaveric renal transplant recipients.
  • To explore the role of nephrocalcinosis and acute tubular necrosis (ATN) in DGF.
  • To evaluate the protective effect of calcium channel blockers on DGF.

Main Methods:

  • Retrospective analysis of 585 cadaveric renal transplants performed between 1986 and 1996.

Related Experiment Videos

  • Correlation of pre-transplant calcium metabolism data and biopsy histology (nephrocalcinosis, ATN, acute rejection) with DGF incidence.
  • Statistical analysis using odds ratios (OR) and 95% confidence intervals (CI) to determine independent associations.

    • Main Results:

    • DGF occurred in 31% of transplants, independently associated with higher serum calcium levels (OR 1.14 per 0.1 mmol/L).
    • Pre-transplant use of calcium channel blockers showed a protective effect against DGF (OR 0.5).
    • Histologic signs of ATN were associated with DGF, but most biopsies also showed rejection or nephrocalcinosis; nephrocalcinosis itself was not linked to DGF or calcium levels.

    Conclusions:

    • Elevated serum calcium levels are an independent risk factor for DGF, not explained by microscopic nephrocalcinosis.
    • High intracellular calcium levels are implicated in DGF pathogenesis.
    • Pre-transplant calcium channel blocker use may mitigate DGF risk, highlighting the importance of managing calcium levels in dialysis patients awaiting transplant.