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Development of Response-Selective Agonists of Human C5a Anaphylatoxin Conformational, Biological, and Therapeutic Considerations

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Numerous studies on the relationship between the structure and function of peptide agonists derived from the biologically active, C-terminal region of human C5a anaphylatoxin have been reported over the past decade. These studies have been performed with the objective of parlaying this structure-function information into the design of peptide-peptidomimetic modulators of C5a receptor (C5aR)-mediated function. In this review, we describe a rational approach for the development of conformationally biased, decapeptide agonists of C5a and described how these stabilized and specific conformational features relate to the expression of specific C5a-like activities in vitro and in vivo. The therapeutic potential of such response-selective C5a agonists is discussed and underscored by the results of one such response-selective C5a agonist that was used in vivo as an effective molecular adjuvant capable of generating antigen-specific humoral and cellular immune responses. Finally, we describe the synthesis of a new generation of highly response-selective, conformationally biased C5a agonist and discuss the in vitro and in vivo biologic results that so indicate this biologic selectivity.
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Keywords: Anaphylatoxin; Antibody Humoral Response; Human C5a; Immunoinflammatory response; Peptide Agonist design

Document Type: Review Article

Publication date: 2001-05-01

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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