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Clinical Microbiology Reviews, Jul 1995, 411-426, Vol 8, No. 3
M Kotb
The recent discovery of the mode of interaction between a group of
microbial proteins known as superantigens and the immune system has opened
a wide area of investigation into the possible role of these molecules in
human diseases. Superantigens produced by certain viruses and bacteria,
including Mycoplasma species, are either secreted or membrane-bound
proteins. A unique feature of these proteins is that they can interact
simultaneously with distinct receptors on different types of cells,
resulting in enhanced cell-cell interaction and triggering a series of
biochemical reactions that can lead to excessive cell proliferation and the
release of inflammatory cytokines. However, although superantigens share
many features, they can have very different biological effects that are
potentiated by host genetic and environmental factors. This review focuses
on a group of secreted pyrogenic toxins that belong to the superantigen
family and highlights some of their structural-functional features and
their roles in diseases such as toxic shock and autoimmunity. Deciphering
the biological activities of the various superantigens and understanding
their role in the pathogenesis of microbial infections and their sequelae
will enable us to devise means by which we can intervene with their
activity and/or manipulate them to our advantage.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Bacterial pyrogenic exotoxins as superantigens
Department of Surgery, University of Tennessee, Memphis, USA.
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