Related Experiment Video
Updated: Apr 6, 2026

Reliable Isolation of Central Nervous System Microvessels Across Five Vertebrate Groups
Published on: January 12, 2020
Small-Medium Vessel Vasculitides: is the Complement System a Potential Forgotten Target?
Insights
Systemic vasculitides involve blood vessel inflammation. The complement system, crucial for immunity, contributes to vasculitic damage, making it a key therapeutic target.
Area of Science:
- Immunology
- Rheumatology
- Autoimmune Diseases
Background:
- Systemic vasculitides are uncommon autoimmune diseases causing blood vessel inflammation.
- The complement system, part of innate immunity, plays a vital role in immune responses.
- Recent research highlights complement's role in adaptive immunity and regulating immune cells.
Purpose of the Study:
- To explore the role of the complement system in the pathogenesis of systemic vasculitides.
- To identify the complement system as a potential therapeutic target for vasculitic disorders.
Main Methods:
- Literature review of complement system function in autoimmune diseases.
- Analysis of complement's involvement in small-medium vessel vasculitides pathogenesis.
- Evaluation of complement as a therapeutic target.
Main Results:
- The complement system is implicated in the development of inflammatory damage in systemic vasculitides.
- Complement activation is critical for T cell immunity, natural antibodies, and autoreactive B cell regulation.
- The complement system contributes to the pathogenesis and clinical manifestations of vasculitic disorders.
Conclusions:
- The complement system plays a significant role in systemic vasculitides.
- Targeting the complement system offers a promising therapeutic strategy for vasculitic disorders.
Abstract:
Systemic vasculitides are a group of uncommon diseases characterized by blood vessel inflammation. The complement system is involved in the pathogenesis and clinical manifestations of several autoimmune diseases, including systemic vasculitides. This enzymatic system is a component of the innate immune system. Its main function was initially believed to be limited to the recognition and elimination of pathogens, but research in recent years has demonstrated the important role that complement proteins play in modulating adaptive immunity and in bridging innate and adaptive responses. Its activation is also critical for the development of T cell immunity and natural antibodies as well as for the regulation of autoreactive B cells. In systemic vasculitides, particularly small-medium vesselvasculitides, the complement system has been shown to contribute to the development of inflammatory damage. In view of these crucial functions, the complement system represents an attractive therapeutic target for a wide range of diseases. including vasculitic disorders.
Related Concept Videos
Complement System
Overview of the Vascular System
Hypersensitivity Reactions: Immune-Complex Reactions
Venules
Venules are much smaller in diameter compared to their larger counterparts, the veins. They are generally 8 to 100 micrometers in diameter, significantly smaller than the size of veins. The walls of venules are thin, consisting of the endothelium, a thin layer of connective tissue, and occasionally a few smooth muscle cells. This structural simplicity is a stark contrast...
Inflammatory Response I: Vascular and Cellular
Clot Retraction and Fibrinolysis

