25-hydroxyvitamin d deficiency in kidney transplant recipients.

Summary of "25-hydroxyvitamin d deficiency in kidney transplant recipients."

Introduction. After kidney transplantation, patients appear to have vitamin D deficiency due to the use of immunosuppressive treatment and prevention of sunlight. This study was designed to determine vitamin D serum levels in kidney transplant patients in comparison with healthy individuals. Materials and Methods. Forty-six kidney transplant patients with a creatinine clearance greater than 60 mL/min and 46 healthy individuals with normal kidney function were tested for serum levels of calcium, phosphorus, 25-hydroxyvitamin D, and parathyroid hormone at the end of the summer. Results. Thirty-one participants were men and 15 were women in each group. The mean age was 41.0 ± 14.2 years in kidney transplant recipients and 41.4 ±13.7 years in the control group. Inadequate serum 25-hydroxyvitamin D was seen in 93.5% of the transplant patients and in 89.1% of the controls. There was a 58.7% vitamin D insufficiency (20 ng/mL to 30 ng/mL) and a 34.8% deficiency (lower than 20 ng/mL) in the patients, and these rates were 58.7% and 26.0% in the control group, respectively. There was no significant difference between the two groups. Conclusions. Vitamin D deficiency is prevalent in kidney transplant patients. Lack of a significant difference between our two groups may be attributable to the high prevalence of vitamin D deficiency in general population and the use of vitamin D supplementation in transplant patients. Indeed, adequate doses of vitamin D in these patients are undetermined. They may need higher doses for normalization of serum vitamin D and metabolic requirements.


Department of Endocrinology, Imam Khomeini Hospital, Mazandaran University of Medical Sciences, Sari, Iran.

Journal Details

This article was published in the following journal.

Name: Iranian journal of kidney diseases
ISSN: 1735-8582
Pages: 57-62


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Medical and Biotech [MESH] Definitions

A mitochondrial cytochrome P450 enzyme that catalyzes the 1-alpha-hydroxylation of 25-hydroxyvitamin D3 (also known as 25-hydroxycholecalciferol) in the presence of molecular oxygen and NADPH-FERRIHEMOPROTEIN REDUCTASE. This enzyme, encoded by CYP27B1 gene, converts 25-hydroxyvitamin D3 to 1-alpha,25-dihydroxyvitamin D3 which is the active form of VITAMIN D in regulating bone growth and calcium metabolism. This enzyme is also active on plant 25-hydroxyvitamin D2 (ergocalciferol).

Non-cadaveric providers of organs for transplant to related or non-related recipients.

Individuals receiving tissues or organs transferred from another individual of the same or different species, or from within the same individual.

9,10-Secoergosta-5,7,10(19),22-tetraene-3,25-diol. Biologically active metabolite of vitamin D2 which is more active in curing rickets than its parent. The compound is believed to attach to the same receptor as vitamin D2 and 25-hydroxyvitamin D3.

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