Recycling of glutathione during oxidative stress in erythrocytes of the newborn.

Abstract:

:The ability of erythrocytes from newborn babies and adults to maintain reduced glutathione levels during oxidative stress was studied. In vitro incubation of erythrocytes with H2O2, with or without inactivation of catalase, caused a rapid depletion of reduced glutathione (GSH) and concomitant accumulation of oxidized glutathione followed by recovery of GSH and fall of oxidized glutathione to initial values in all subjects. Inactivation of catalase resulted in a 50% loss of intracellular glutathione (p less than 0.005), a larger maximum GSH depletion (p less than 0.05), and a longer GSH recovery time (p less than 0.005). Erythrocytes from newborn babies showed a smaller maximum GSH depletion (p less than 0.05) and a shorter GSH recovery time (p less than 0.005) compared with those from adults. These differences between the newborn and adult groups persisted after inactivation of catalase. An increase in maximum GSH depletion and GSH recovery time (p less than 0.005) was observed when a lower hematocrit was used for these GSH recovery studies. Effective glutathione recycling in erythrocytes may protect immature tissues of the newborn baby from peroxidative damage.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Clahsen PC,Moison RM,Holtzer CA,Berger HM

doi

10.1203/00006450-199210000-00006

subject

Has Abstract

pub_date

1992-10-01 00:00:00

pages

399-402

issue

4

eissn

0031-3998

issn

1530-0447

journal_volume

32

pub_type

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