An elevated hematogenous photosensitizer in the preterm neonate.

Abstract:

PURPOSE:Human blood contains low levels of protoporphyrin IX (PP IX), a photoactive compound that produces reactive oxygen species when exposed to light. It has been proposed that photoactivation of PP IX and subsequent generation of potentially tissue-damaging reactive oxygen may be a mechanism of retinal injury in retinopathy of prematurity (ROP). The purpose of this study is to determine an association between blood PP IX level and infant birth-weight and gestational age. METHODS:Erythrocyte PP IX levels were measured from the umbilical cord blood of 31 neonates, both full term and preterm. Birthweights and gestational ages were recorded. RESULTS:PP IX levels in infants weighing < 1000 grams (n = 7) average 200 micrograms/dl, which is significantly higher than PP IX levels in infants weighing > 1000 grams (125 micrograms/dl, n = 24; P < 0.02). CONCLUSION:Elevated PP IX levels may place preterm neonates at increased risk for photosensitizing retinal injury.

authors

Bynoe LA,Gottsch JD,Sadda SR,Panton RW,Haller EM,Gleason CA

subject

Has Abstract

pub_date

1993-09-01 00:00:00

pages

2878-80

issue

10

eissn

0146-0404

issn

1552-5783

journal_volume

34

pub_type

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