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Updated: Jan 27, 2026

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Measuring the 50% Haemolytic Complement CH50 Activity of Serum
Published on: March 29, 2010
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Decreased serum complement component 4 levels in patients with schizophrenia.
Psychiatric Genetics
|April 2, 2019
Summary
Serum complement component 4 (C4) levels are lower in individuals with schizophrenia compared to healthy controls. This finding holds true for both males and females, suggesting C4 as a potential biomarker for schizophrenia.
Area of Science:
- Neuroimmunology
- Biochemistry
- Psychiatry
Background:
- Immune system dysregulation is implicated in mental health disorders.
- Complement component 4 (C4) has been suggested as a potential factor in schizophrenia.
- Understanding C4's role could offer new diagnostic and therapeutic avenues.
Purpose of the Study:
- To investigate the association between serum C4 levels and schizophrenia.
- To compare C4 levels in schizophrenia patients versus healthy controls.
Main Methods:
- A case-control study involving 40 adult schizophrenia patients and 40 matched healthy controls.
- Serum C4 levels were quantified using a C4 enzyme-linked immunosorbent assay (ELISA) kit.
Main Results:
- Serum C4 levels were significantly lower in patients with schizophrenia compared to healthy controls.
- This reduction in C4 levels was observed in both male and female participants.
Conclusions:
- Lower serum C4 levels may serve as a potential biomarker for schizophrenia.
- These findings provide a foundation for developing diagnostic tools and clinical treatments for schizophrenia.
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