Plasma exchange induces vitamin D deficiency

Plasma exchange is used in the treatment of diseases mediated by pathogenic circulating proteins, or for transplant desensitization. Its non-targeted nature results in the depletion of physiologically important molecules, and it is often complicated by hypocalcaemia. To determine the effects of plas...

Full description

Saved in:
Bibliographic Details
Published in:QJM : An International Journal of Medicine 2014-02, Vol.107 (2), p.123-130
Main Authors: Hiemstra, T F, Casian, A, Boraks, P, Jayne, D R, Schoenmakers, I
Format: Article
Language:English
Subjects:
Adult
Aged
Calcium - blood
Female
Humans
Male
Middle Aged
Original Papers
Plasma Exchange - adverse effects
Prospective Studies
Vitamin D - analogs & derivatives
Vitamin D - blood
Vitamin D Deficiency - blood
Vitamin D Deficiency - etiology
Vitamin D-Binding Protein - blood
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Plasma exchange is used in the treatment of diseases mediated by pathogenic circulating proteins, or for transplant desensitization. Its non-targeted nature results in the depletion of physiologically important molecules, and it is often complicated by hypocalcaemia. To determine the effects of plasma exchange on vitamin D binding protein (DBP) and associated vitamin D metabolites. Single-centre prospective cohort study of 11 patients. DBP and vitamin D metabolites were measured before and immediately after five plasma exchanges, and 7 and 28 days after discontinuation of plasma exchange. Plasma exchange reduced plasma DBP concentration from 196.9 ± 53.2 to 98.5 ± 34 μg/ml (P = 0.0001), 1,25-dihydroxyvitamin D from 103 ± 52 to 42 ± 4 pmol/l (P = 0.003) and 25-hydroxyvitamin D from 49.7 ± 29 to 22 ± 9.4 nmol/l (P = 0.0017), through their removal in effluent. After 7 days, DBP and 1,25-dihydroxyvitamin D were not significantly different from baseline, but 25-hydroxyvitamin D remained significantly lower after 7 days (26.4 ± 9.8 nmol/l, P = 0.02) and 28 days (30.8 ± 15.5 nmol/l, P = 0.048). Corrected calcium decreased from 2.23 ± 0.11 to 1.98 ± 0.08 mmol/l (P = 0.0007) immediately after five treatments. Plasma calcium was significantly associated with 1,25-dihydroxyvitamin D (r(2) = 0.79, P < 0.0001). Plasma exchange induced an acute reversible decrease in plasma 1,25-dihydroxyvitamin D, DBP, calcium and a sustained decrease in plasma 25-hydroxyvitamin D.
ISSN:1460-2725
1460-2393
DOI:10.1093/qjmed/hct208