Treatment with vitamin D and calcium reduces bone loss after renal transplantation: a randomized study

J Am Soc Nephrol. 2002 Jun;13(6):1608-14. doi: 10.1097/01.asn.0000016082.70875.36.


A decrease in bone mineral density (BMD) is a major complication of renal transplantation (RTx), predominantly occurring within the first 6 mo after RTx. The most important causative factor is the use of corticosteroids, but persisting hyperparathyroidism and abnormalities in vitamin D metabolism play a role too. This study examines the effect of treatment with calcium and active vitamin D on the loss of BMD in the first 6 mo after RTx. A total of 111 renal transplant recipients (65 men, 46 women; age, 47 +/- 13 yr) were randomized to either treatment with active vitamin D (0.25 microg/d) plus calcium (1000 mg/d) (CaD group), or to no treatment (NoT group). Immunosuppressive therapy consisted of cyclosporine, prednisone, and mycophenolate mofetil. Laboratory parameters and BMD (lumbar spine and hip) were measured at 0, 1 (laboratory only), 3, and 6 mo after RTx. Lumbar BMD was nearly normal at the time of RTx. In both groups, a significant decrease in lumbar BMD was observed during the first 3 mo (CaD, -3.3 +/- 4.3%; P < 0.0001; NoT, -4.1 +/- 4.8%; P < 0.0001). Between the third day and sixth month, lumbar BMD slightly recovered in the CaD group, but it decreased further in the NoT group (total loss 0 to 6 mo: CaD, -2.6 +/- 5.0% [P < 0.001]; NoT, -5.0 +/- 4.7% [P < 0.0001]). As a result, the amount of bone loss at 6 mo was significantly lower in the CaD group (P = 0.02). Loss of BMD at the different femoral sites was also significantly reduced in the CaD group. Apart from a trend toward more frequent hypercalcemia in the CaD group, no clinical or biochemical differences existed between the groups. Treatment with a low dose of active vitamin D and calcium partially prevents bone loss at the lumbar spine and proximal femur during the first 6 mo after RTx.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Aged
  • Bone Density
  • Calcium / therapeutic use*
  • Female
  • Graft Rejection
  • Humans
  • Immunosuppression Therapy
  • Kidney Transplantation / adverse effects*
  • Male
  • Middle Aged
  • Osteoporosis / prevention & control*
  • Parathyroid Hormone / blood
  • Vitamin D / therapeutic use*


  • Parathyroid Hormone
  • Vitamin D
  • Calcium