Red blood cells inhibit apoptosis of human neutrophils.

Abstract:

:Oxidative stress has been implicated in the triggering of apoptosis in neutrophils. Because red blood cells (RBCs) are well known to scavenge oxidants including H2O2, we tested the hypothesis that RBCs inhibit apoptosis of neutrophils by reducing intracellular oxidative stress. Apoptosis of neutrophils was evaluated by light microscopy and DNA gel electrophoresis. We found that coculture with RBCs protected against neutrophil apoptosis. Neither physical contact between RBCs and neutrophils nor the cellular integrity of RBCs was required to protect against neutrophil apoptosis. Neutrophil apoptosis was promoted by exogenous H2O2 but suppressed by catalase, indicating a role for H2O2 as a mediator of apoptosis. The protective effect of RBCs against apoptosis was due to catalase and glutathione metabolism because blocking of these antioxidant systems in RBCs attenuated the protective effect of RBCs. These results suggest that neutrophils are protected against apoptosis in the circulation.

journal_name

Blood

journal_title

Blood

authors

Aoshiba K,Nakajima Y,Yasui S,Tamaoki J,Nagai A

subject

Has Abstract

pub_date

1999-06-01 00:00:00

pages

4006-10

issue

11

eissn

0006-4971

issn

1528-0020

journal_volume

93

pub_type

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