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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
Published on: January 29, 2014
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Evaluation of expression levels and mechanism of complement activation
Xing Wang1, An-Heng Liu2, Zhong-Wei Jia1
1Department of Cardiology, The 254th Hospital of PLA, Tianjin 300142, P.R. China.
Experimental and Therapeutic Medicine
|October 1, 2017
Summary
Complement system activation and elevated C3a receptor expression occur in acute myocardial infarction (AMI). This suggests the C3a-C3a receptor pathway may contribute to heart attack development.
Area of Science:
- Cardiovascular Medicine
- Immunology
- Molecular Biology
Background:
- Acute myocardial infarction (AMI) involves complex inflammatory processes.
- The role of the complement system in AMI pathogenesis requires further elucidation.
Purpose of the Study:
- To investigate complement system activation during AMI.
- To determine the expression levels of the C3a receptor in myocardial infarction tissues.
Main Methods:
- Plasma levels of complement activation products (C3a, C4a, C5a) were measured using cytometric bead array.
- C3a receptor protein expression in cardiac tissues was assessed via immunoblotting.
- Study included healthy individuals and patients with coronary artery stenosis or AMI.
Main Results:
- Significantly elevated levels of C3a, C4a, and C5a were observed in patients with coronary artery stenosis and AMI compared to controls (P<0.01).
- Protein expression of the C3a receptor was significantly higher in infarct tissues from AMI patients than in adjacent normal tissues (P<0.05).
Conclusions:
- Complement system activation is evident in patients with acute myocardial infarction.
- Increased C3a receptor expression in infarct zones suggests the C3a-C3a receptor pathway's involvement in myocardial infarction development.
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