25-hydroxyvitamin d deficiency in kidney transplant recipients.

05:24 EDT 29th August 2015 | BioPortfolio

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.

Affiliation

Department of Endocrinology, Imam Khomeini Hospital, Mazandaran University of Medical Sciences, Sari, Iran. zkashi@mazums.ac.ir.

Journal Details

This article was published in the following journal.

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

Links

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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).

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