Related Experiment Video
Updated: May 11, 2026

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis
Published on: June 20, 2012
Factor H-related 2 levels dictate FHR dimer composition.
Bert R J Veuskens1,2, Mieke C Brouwer1, Gerard van Mierlo1
1Sanquin Research and Landsteiner Laboratory of the Amsterdam University Medical Centers, University of Amsterdam, Plesmanlaan 125, 1066 CX, Amsterdam, The Netherlands.
Factor H-related proteins 1 and 2 form dimers, influencing complement regulation. This study developed a new ELISA to quantify Factor H-related protein 2 homodimers, revealing insights into dimer distribution and disease associations.
Area of Science:
- Immunology
- Complement System Biology
- Protein Biochemistry
Background:
- Factor H-related (FHR) proteins 1 and 2 form homodimers and heterodimers.
- Dimerization is thought to enhance their antagonistic function against complement regulator Factor H (FH).
- Previous quantification methods could not directly measure FHR-2 homodimers, limiting understanding of FHR-1 and FHR-2 dimer distribution.
Purpose of the Study:
- To develop a specific ELISA for direct quantification of FHR-2 homodimers.
- To accurately measure all FHR-1 and FHR-2 containing dimers in a healthy donor cohort.
- To elucidate the role of FHR-2 homodimers in complement regulation and disease.
Main Methods:
- Development of novel in-house generated FHR-2 antibodies.
- Creation of a specific ELISA assay for FHR-2 homodimer quantification.
- Analysis of dimer stability, kinetics, and distribution using native and deficient plasma.
Main Results:
- Enabled the first accurate measurement of all FHR-1 and FHR-2 containing dimers.
- Confirmed rapid and dynamic dimer formation in human plasma.
- Demonstrated that FHR-1/2 dimerization equilibrium is limited by low FHR-2 levels relative to FHR-1.
Conclusions:
- The developed ELISA allows precise assessment of FHR-2 homodimer levels.
- Understanding FHR dimer distribution is crucial given genetic links to complement-related diseases.
- FHR-2 levels significantly impact the overall dimer distribution and complement regulatory function.
More Related Videos
05:59New Framework for Understanding Cross-Brain Coherence in Functional Near-Infrared Spectroscopy (fNIRS) Hyperscanning Studies
Published on: October 6, 2023
05:16Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
Published on: June 10, 2025
Related Concept Videos
Hardy-Weinberg Principle
Factorial Design
Chi-square Analysis
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...
F Distribution
Two-Way ANOVA
The two-way ANOVA analysis initially begins by stating the null hypothesis that there is an interaction effect between the two factors of a dataset. This effect can be visualized using line segments formed by joining the means for...
Identifying Statistically Significant Differences: The F-Test