期刊
SEMINARS IN IMMUNOPATHOLOGY
卷 40, 期 1, 页码 15-35出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00281-017-0661-x
关键词
C3; Amplification loop; Regulation; Properdin; Therapy
This review is not intended to cover in detail all aspects of the discovery and evolution of our understanding of the alternative pathway of complement activation, there are many excellent reviews that do this (see Fearon (CRC Crit Rev Immunol 1:1-32, 1979), Pangburn and Muller-Eberhard (Springer Semin Immunopathol 7:163-192, 1984)), but instead to give sufficient background for current concepts to be put in context. The prevailing textbook view, of components having a primary role as an alternative pathway for C3 activation, is challenged, with an argument developed for the primary role of the system being that of providing a surface-dependent amplification loop for both C3 and C5 activation. Whatever the mechanism by which the initial C3b molecule is generated, deposition onto a surface has the potential to target that surface for elimination. Elimination or escape from initial targeting is determined by a sophisticated and highly regulated amplification loop for C3 activation. This viewpoint of the system is then briefly developed to provide a context for therapeutic treatment of disease caused, at least in part, by dysregulated amplification of C3 activation, and to highlight some of the challenges that such therapies will face and need to address.
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