Complement C3 Genotyping of Slow and Fast Variants by Real Time PCR-High Resolution Melting

• Published in: European journal of inflammation Vol. 10; no. 3; pp. 329 - 334
• Main Authors: Valero-Hervás, D.M., Morales, P., Castro, M.J., Varela, P., Castillo-Rama, M., Moreno, E., Meneu, J.C., Mora-Díaz, S., Talayero, P., Paz-Artal, E.
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.09.2012; SAGE PUBLICATIONS, INC; SAGE Publishing
• Subjects: Arginine; Complement; Complement component C3; Genotyping; Glycine; Melting; Mutation; Polymerase chain reaction; Primers; C3 complement factor polymorphism; Amplification Refractory Mutation System; C3 variants genotyping; Real Time PCR-High Resolution Melting
• ISSN: 2058-7392; 1721-727X; 2058-7392
• DOI: 10.1177/1721727X1201000308

“Slow” and “Fast” C3 complement variants (C3S and C3F) result from a g.304C>G polymorphism that changes arginine to glycine at position 102. C3 variants are associated with complement-mediated diseases and outcome in transplantation. In this work C3 genotyping is achieved by a Real Time PCR - High Resolution Melting (RT-PCR-HRM) optimized method. In an analysis of 49 subjects, 10.2% were C3FF, 36.7% were C3SF and 53.1% were C3SS. Allelic frequencies (70% for C3S and 30% for C3F) were in Hardy-Weinberg equilibrium and similar to those published previously. When comparing RT-PCR-HRM with the currently used Tetraprimer-Amplification Refractory Mutation System PCR (T-ARMS-PCR), coincidence was 93.8%. The procedure shown here includes a single primer pair and low DNA amount per reaction. Detection of C3 variants by RT-PCR-HRM is accurate, easy, fast and low cost, and it may be the method of choice for C3 genotyping.