Human complement factor 3 polymorphism determination by capillary electrophoresis of serum

Area of Science:

• Clinical chemistry
• Immunology
• Biochemistry

Background:

• Complement factor 3 (C3) is a crucial protein in the immune system.
• Understanding C3 variations is important for accurate diagnosis.
• Current methods for analyzing C3 phenotypes can be time-consuming.

Purpose of the Study:

• To investigate the variability of complement factor 3 (C3) mobility in serum protein electrophoresis.
• To establish a reliable method for determining C3 migration times using clinical capillary electrophoresis (CE).
• To analyze the differences in migration times among major C3 phenotypes.

Main Methods:

• Utilized clinical capillary electrophoresis (CE) equipment (Capillarys™ 2 system, Sebia).
• Reproducibly determined C3 migration times with a between-run coefficient of variation (CV) of 0.76%.
• Compared migration times of C3 phenotypes FF, FS, and SS.

Main Results:

• Demonstrated reproducible determination of C3 migration times using clinical CE.
• Found significant differences (p<0.001) in migration times between C3 phenotypes FF, FS, and SS.
• Confirmed that glycosylation did not significantly affect C3 migration test results.

Conclusions:

• This study presents the first report on C3 phenotype migration times using a clinical CE instrument.
• The developed CE method provides faster results compared to agarose electrophoresis or genotyping.
• Serum C3 concentration reference ranges are phenotype-dependent, enabling more precise clinical interpretation.