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Published on: May 4, 2017
Chemical Approaches to Modulating Complement-Mediated Diseases
Abishek Iyer1,2, Weijun Xu2, Robert C Reid2
1Centre for Inflammation and Disease Research, Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia.
Insights
Chronic inflammation drives many diseases. New insights into Complement proteins offer therapeutic opportunities for inflammatory and autoimmune diseases by targeting Complement-driven signaling pathways.
Area of Science:
- Immunology and Molecular Biology
- Biochemistry of protein networks
Background:
- Chronic inflammation underlies numerous diseases, posing significant health burdens.
- The Complement system, comprising over 40 proteins, plays a crucial role in immunity, pathogen elimination, and tissue repair.
- Dysregulated or prolonged Complement activation can lead to chronic inflammation and autoimmune conditions.
Purpose of the Study:
- To review the complex formation, structures, and functions of Complement proteins.
- To explore new opportunities for therapeutic intervention in Complement-mediated diseases.
- To consolidate evidence for small molecule and peptide-based drug leads targeting Complement pathways.
Main Methods:
- Review of recent structural data for Complement proteins.
- Analysis of emerging knowledge on Complement protein function and signaling.
- Compilation of data on therapeutic modulators of Complement activation.
Main Results:
- New structural and functional insights into Complement proteins are enhancing understanding of their roles in health and disease.
- Emerging small molecule and peptide-based drug leads show promise in preclinical models.
- Evidence for efficacy in cellular and animal models of inflammatory disease and some human conditions is presented.
Conclusions:
- Advances in understanding Complement protein structure and function open new avenues for therapeutic development.
- Targeting Complement-driven signaling offers a promising strategy for managing inflammatory and autoimmune diseases.
- Further research and clinical validation of Complement modulators are warranted.
Abstract:
Numerous diseases are driven by chronic inflammation, placing major burdens on our health systems. Controlling inflammation is an important preventative and therapeutic goal. Over 40 "Complement" proteins are produced in blood or on cell surfaces through activation of the Complement protein network mainly by infection or injury. These proteins complement immune cells and antibodies to identify, tag, destroy, and eliminate pathogens and infected or damaged cells and repair tissues. If the inflammatory stimulus is not removed by localized acute immune responses, Complement activation may be prolonged or misdirected to healthy cells, and chronic inflammation can lead to inflammatory or autoimmune diseases. The formation, structures, and interplay between Complement proteins are complex, and this has limited our detailed understanding of their roles and importance in physiology and disease. With the availability of new structures for Complement proteins, new knowledge of how they function, and new modulators of Complement-driven signaling, there are also new opportunities to intervene in Complement-mediated disease. Small molecule and peptide-based drug leads, identified as clues for Complement-directed therapeutic development, are assembled here together with the available evidence for their efficacy in cellular and animal models of human inflammatory disease and in some human clinical conditions.
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