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Year : 2019  |  Volume : 29  |  Issue : 4  |  Page : 242-247

Vitamin D, 1,25-Dihydroxyvitamin D, FGF23, and graft function after renal transplantation

Department of Nephrology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Rae Bareli Road, Lucknow, Uttar Pradesh, India

Correspondence Address:
Prof. Raj Kumar Sharma
Sanjay Gandhi Post Graduate Institute of Medical Sciences, Rae Bareli Road, Lucknow - 226 014, Uttar Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijn.IJN_307_18

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Vitamin-D has immuno-modulatory properties besides its role in mineral and bone disorder (MBD) and could have a role in allograft outcome. Fifty-two chronic kidney disease patients on dialysis going for transplantation were prospectively studied before and after renal transplantation. FGF23, 25(OH) vitamin D, 1,25-Dihydroxyvitamin D, PTH, serum Ca, serum PO4, and e-GFR status were evaluated. Vitamin D deficiency was seen in 25.0% of recipients before transplant (26.09 ± 12.19 ng/mL) and in 48.1% at 6 months post-transplant (23.36 ± 15.11 ng/mL). 1,25-(OH)2D levels before transplant were 102.37 ± 108.44 pmol/L, which were less than control (143.30 ± 108.0 pmol/L) and decreased further to 46.20 ± 42.11 pmol/mL at 3 months and started increasing to 78.37 ± 60.12 pmol/mL at 6 months post-transplantation without vitamin D supplementation. The prevalence of hypophosphatemia after transplantation was 32.0%, hyperkalemia was 12.0%, elevated intact PTH levels at 3 and 6 months after transplant were seen in 66.7% and 30.8% patients, respectively. FGF-23 levels were high in 72.5% of patients before transplant (495.94 ± 690.68 pg/mL) and decreased to normal levels at 3 months post-transplant (31.63 ± 14.17 pg/m) (control 32.07 ± 9.78 pg/mL). Serum intact PTH levels were 379.54 ± 281.27 pg/mL before transplant and came down to 103.96 ± 68.34 at 3 months and 69.87 ± 116.03 at 6 months post-transplantation. There was trend of higher e-GFR at 1 year post-transplant in patients without vitamin D deficiency (levels ≥30 ng/mL). The dysregulated mineral metabolism continues in post-transplant despite improvement in renal function and normalization of FGF-23.


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Indian Journal of Nephrology
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Online since 20th Sept '07