[Evaluation of complement component C4 concentration and immunoglobulins IgA, IgG, and IgM in serum of patients with primary essential hypertension]
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Updated: Oct 8, 2026

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
Published on: January 29, 2014
M Tomaszewski1, E Zukowska-Szczechowska, W Grzeszczak
1Katedra i Klinika Chorób Wewnetrznych i Diabetologii w Zabrzu Slaskiej AM w Katowicach.
Insights
Hypertensive patients show higher serum concentrations of complement component C4 compared to healthy individuals. This elevation in C4 may indicate immunological disturbances linked to essential hypertension.
Area of Science:
- Immunology
- Nephrology
- Clinical Medicine
Background:
- Essential hypertension is a complex condition with potential links to immune system dysregulation.
- Understanding immunological markers in hypertension can offer insights into disease mechanisms and progression.
Purpose of the Study:
- To compare serum concentrations of complement component C4 and immunoglobulins (IgA, IgG, IgM) between hypertensive patients and healthy controls.
- To investigate the relationship between these immunological markers and clinical data, including hypertension duration.
Main Methods:
- Serum samples from 81 hypertensive patients and 34 healthy controls were analyzed.
- Turbidymetry was used to quantify concentrations of C4, IgA, IgG, and IgM.
- Statistical analysis was performed to compare groups and assess correlations.
Main Results:
- Hypertensive patients exhibited significantly higher serum C4 concentrations than controls.
- No significant differences in serum IgA, IgG, or IgM levels were observed between the groups.
- A positive correlation was found between hypertension duration and serum C4 concentration.
Conclusions:
- Elevated serum C4 may serve as a potential biomarker for immunological disturbances in essential hypertension.
- Standard immunoglobulin levels (IgA, IgG, IgM) do not appear to be directly associated with essential hypertension.
Abstract:
The aim of the study was to determine serum concentration of complement component C4 and IgA, IgG, IgM immunoglobulins in hypertensive patients and healthy controls as well as to assess the interrelationships regarding some immunological and clinical data in the study group. The study group consisted of 81 hypertensive patients (with secondary forms of hypertension excluded), 44 females and 37 males (mean age 51.2 +/- 14.5 years). The control group comprised 34 healthy volunteers, 19 females and 15 males (mean age 47.5 +/- 15.3 years). C4, IgA, IgG, IgM serum concentrations were evaluated with turbidymetry. C4 serum concentration was significantly higher in hypertensive patients when compared to the controls. No significant differences in IgA, IgG, IgM serum concentrations existed between the groups. The duration of hypertension correlated positively with C4 serum concentration. Elevated C4 serum concentration may be one of the markers of immunological disturbances existing in hypertensive patients. IgA, IgG, IgM immunoglobulins do not seem to be directly associated with essential hypertension.
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