Clinical Microbiology Reviews, Jan 1997, 1-18, Vol 10, No. 1
RA Miller and BE Britigan
Reactive oxidant species (superoxide, hydrogen peroxide, hydroxyl radical,
hypohalous acid, and nitric oxide) are involved in many of the complex
interactions between the invading microorganism and its host. Regardless of
the source of these compounds or whether they are produced under normal
conditions or those of oxidative stress, these oxidants exhibit a broad
range of toxic effects to biomolecules that are essential for cell
survival. Production of these oxidants by microorganisms enables them to
have a survival advantage in their environment. Host oxidant production,
especially by phagocytes, is a counteractive mechanism aimed at microbial
killing. However, this mechanism may be contribute to a deleterious
consequence of oxidant exposure, i.e., inflammatory tissue injury. Both the
host and the microorganism have evolved complex adaptive mechanisms to
deflect oxidant-mediated damage, including enzymatic and nonenzymatic
oxidant- scavenging systems. This review discusses the formation of
reactive oxidant species in vivo and how they mediate many of the processes
involved in the complex interplay between microbial invasion and host
defense.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Role of oxidants in microbial pathophysiology
Department of Internal Medicine, Veterans Administration Medical Center, Iowa City, Iowa, USA.
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