Structured Summary
Abstract
The smaller fragment formed when complement C4 is cleaved by COMPLEMENT C1S. It is an anaphylatoxin that causes symptoms of immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE) but its activity is weaker than that of COMPLEMENT C3A or COMPLEMENT C5A.
MeSH Record
Classification
Broader headings
Related Concepts
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Drug Class
Pharmacological Action
MeSH Record
Synonyms
6 entry terms
- C4a Complement
- Complement 4a
- Complement Component 4a
- C4a, Complement
- Complement, C4a
- Component 4a, Complement
MeSH Record
Aspects Covered
29 allowable subheadings
Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.
MeSH Record
History Note
2006 (1990)
MeSH Record
Previous Indexing
- Anaphylatoxins (1980-1982)
- Complement 4 (1978-1989)
MeSH Hierarchy
Tree Numbers
AMA Style
References
- National Library of Medicine. Complement C4a. Medical Subject Headings (MeSH). 2026. Unique ID D015934. http://id.nlm.nih.gov/mesh/2026/D015934
- Complement C4a. In: Wikidata. https://www.wikidata.org/wiki/Q21102477