Format

Send to

Choose Destination
J Pediatr (Rio J). 2008 Mar-Apr;84(2):141-6. doi: 10.2223/JPED.1765. Epub 2008 Mar 18.

Phototherapy causes DNA damage in peripheral mononuclear leukocytes in term infants.

Author information

1
Pediatrics Department, Medical Faculty, Harran University, Sanliurfa, Turkey. ayciceka@hotmail.com

Abstract

OBJECTIVE:

Our aim was to determine whether endogenous mononuclear leukocyte DNA strand is a target of phototherapy.

METHODS:

The study included 65 term infants aged between 3-10 days that had been exposed to intensive (n = 23) or conventional (n = 23) phototherapy for at least 48 hours due to neonatal jaundice, and a control group (n = 19). DNA damage was assayed by single-cell alkaline gel electrophoresis (comet assay). Plasma total antioxidant capacity and total oxidant status levels were also measured, and correlation between DNA damage and oxidative stress was investigated.

RESULTS:

Mean values of DNA damage scores in both the intensive and conventional phototherapy groups were significantly higher than those in the control group (p < 0.001). Mean values and standard deviation were 32 (9), 28 (9), 21 (7) arbitrary unit, respectively. Total oxidant status levels in both the intensive and conventional phototherapy groups were significantly higher than those in the control group (p = 0.005). Mean (standard deviation) values were 18.1 (4.2), 16.9 (4.4), 13.5 (4.2) micromol H2O2 equivalent/L, respectively. Similarly, oxidative stress index levels in both the intensive and conventional phototherapy groups were significantly higher than those in the control group (p = 0.041). Plasma total antioxidant capacity and total bilirubin levels did not differ between the groups (p > 0.05). There were no significant correlations between DNA damage scores and bilirubin, total oxidant status and oxidative stress levels in either phototherapy group (p > 0.05).

CONCLUSIONS:

Both conventional phototherapy and intensive phototherapy cause endogenous mononuclear leukocyte DNA damage in jaundiced term infants.

PMID:
18350230
DOI:
10.2223/JPED.1765
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Sociedade Brasileira de Pediatria
Loading ...
Support Center