PlumX Metrics
Embed PlumX Metrics

Characterization of the vitamin A transport in preterm infants after repeated high-dose vitamin A injections

European Journal of Clinical Nutrition, ISSN: 1476-5640, Vol: 68, Issue: 12, Page: 1300-1304
2014
  • 7
    Citations
  • 0
    Usage
  • 21
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

Background/Objectives:Preterm infants have low vitamin A stores at birth, and parenteral administration of high-dose vitamin A reduces pulmonary morbidity. The aim was to characterize vitamin A transport and status.Subjects/Methods:Prospective study of 69 preterm infants (median birth weight 995 g, gestational age 28 weeks), in which 51 received 5000 IU vitamin A three times per week intramuscular (i.m.) for 4 weeks and 18 infants without i.m. vitamin A served as controls. Serum retinol, retinyl palmitate, total retinol-binding protein 4 (RBP4), retinol-unbound RBP4 (apo-RBP4) and transthyretin concentrations were determined at days 3 (D3) and 28 (D28) of life.Results:D3 retinol concentrations were low for the entire group (382 (285/531) nmol/l; median/interquartile range) and unrelated to gestational age. D28 retinol was unchanged in controls (382 (280/471) nmol/l), but increased in the vitamin A group (596 (480/825) nmol/l; P<0.001). A similar pattern was observed for RBP4. The calculated retinol-to-RBP4 ratio rose in vitamin A infants (D3: 0.81 (0.57/0.94), D28: 0.98 (0.77/1.26); P<0.01) but not in controls. In the vitamin A group, the retinol-to-RBP4 ratio was >1 in 15% of all infants on D3 and in 45% of infants on D28, but was ≤1 in all, but one, controls on D28.Conclusions:In preterm infants receiving a 4-week course of high-dose i.m. vitamin A, serum retinol concentrations increased by 55%, with molar concentrations of retinol exceeding those of RBP4 in 45% of the infants suggesting transport mechanisms other than RBP4.

Bibliographic Details

A. C. Longardt; M. Obladen; C. Bührer; A. Loui; B. Schmiedchen; J. Raila; F. J. Schweigert

Springer Science and Business Media LLC

Medicine; Nursing

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know