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Enhanced generation of reactive oxygen species in monocytes from patients with common variable immunodeficiency.

Abstract：

:Monocyte and macrophage dysfunction may be important for both immunopathogenesis and clinical manifestations in subgroups of patients with primary hypogammaglobulinaemia. In the present study we examined the ability to generate reactive oxygen species (ROS) in isolated monocytes from these patients by two different methods: superoxide dismutase (SOD) inhibitable cytochrome c reduction by O2- and nitroblue tetrazolium (NBT) reduction. Monocyte from patients with common variable immunodeficiency (CVI) demonstrated significantly enhanced ROS generation both unstimulated and stimulated (unopsonized zymosan and phorbol myristate acetate (PMA)). The enhanced oxidative burst response in CVI patients was found both with and without serum containing medium. Furthermore, serum from CVI patients did significantly enhance the oxidative burst response in monocytes from healthy blood donors compared with the effect of control serum. The enhanced ROS generation in CVI patients was significantly correlated with elevated serum levels of neopterin, reduced numbers of CD4+ lymphocytes in peripheral blood and occurrence of splenomegaly. In contrast to the CVI group, monocytes from patients with X-linked agammaglobulinaemia (XLA) did not show enhanced ROS generation. The increased oxidative burst response in monocytes from CVI patients most probably reflects in vivo activation of these cells. Our observations indicate the presence of a subgroup of CVI patients characterized by chronic immune activation particularly of monocytes. The enhanced ROS generation might be involved in immunopathogenesis (e.g. T cell dysfunction) and in the pathogenesis of clinical manifestations (e.g. malignancies and autoimmune disorders) in these patients.

journal_name

Clin Exp Immunol

journal_title

Clinical and experimental immunology

authors

Aukrust P,Müller F,Frøland SS

doi

10.1111/j.1365-2249.1994.tb06073.x

subject

Has Abstract

pub_date

1994-08-01 00:00:00

pages

232-8

issue

2

eissn

0009-9104

issn

1365-2249

journal_volume

97

pub_type

杂志文章

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