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Updated: Jun 8, 2026

Depletion of Specific Cell Populations by Complement Depletion
Published on: February 5, 2010
The complement system
1Department of Pathology, The University of Michigan Medical School, 1301 Catherine Rd., Box 5602, Ann Arbor, MI 48109-5602, USA.
Insights
The complement system is a key part of host defense and inflammation. Dysregulation of this protein network contributes to diseases like lupus and asthma.
Area of Science:
- Immunology
- Biochemistry
Background:
- The complement system is a crucial component of the innate immune system.
- It comprises a network of proteins involved in host defense and inflammatory processes.
- Complement activation leads to pathogen opsonization, phagocytosis, and cell lysis.
Purpose of the Study:
- To provide an overview of the complement system.
- To elucidate the dual role of complement in inflammatory responses.
- To understand the implications of complement dysregulation in disease.
Main Methods:
- This is a review article.
- It synthesizes existing knowledge on complement biology.
- Literature search and analysis of complement functions.
Main Results:
- Complement activation is essential for effective pathogen clearance.
- Inappropriate complement activation or deficiency is linked to autoimmune and inflammatory diseases.
- The system exhibits both protective and detrimental effects during inflammation.
Conclusions:
- Understanding the complement system's complex roles is vital.
- Targeting complement pathways may offer therapeutic strategies for inflammatory diseases.
- Further research is needed to fully harness complement's potential in medicine.
Abstract:
The complement system consists of a tightly regulated network of proteins that play an important role in host defense and inflammation. Complement activation results in opsonization of pathogens and their removal by phagocytes, as well as cell lysis. Inappropriate complement activation and complement deficiencies are the underlying cause of the pathophysiology of many diseases such as systemic lupus erythematosus and asthma. This review represents an overview of the complement system in an effort to understand the beneficial as well as harmful roles it plays during inflammatory responses.
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