Genetics

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“Molgen Genetics Haemostatic Disease (B-Fibrinogen/FXIII) Kit” is an assay kit for the detection of single nucleotide polymorphism in FGB and F13A1 genes of blood coagulation system usingreal-time PCR with detection of melting curves.

“Molgen Genetics Haemostatic Disease (B-Fibrinogen/FXIII) Kit” is intended for the detection of single nucleotide polymorphism G (-455)A in FGB gene (encodes fibrinogen and coagulation factor I) and G103T in F13A1 gene (encodes coagulation factor XIII A subunit) in clinical specimens (whole blood, buccal epithelium) using the method of real-time polymerase chain reaction (PCR) with melting curve analysis.

The results of genotyping are taken into account in complex evaluation of thrombophilia risk (susceptibility to hereditary thrombophilia).

The extraction of DNA from clinical specimens can be performed using “Molgen Universal Extraction Kit”.

The kit is intended for use with block-type PCR cycler CFX96 (Bio-Rad, USA) such as Adaltis AmpliLab.

The kit contains reagents required for 48 tests, including control samples.

The principle of the method is based on the amplification of the selected human DNA region with subsequent formation of hybrid duplexes of PCR product with the specific DNA probe and the detection of duplexes melting curves.

The amplification step consists of repeated cycles: temperature denaturation of the DNA template, primers annealing to specific sites of the DNA template, and primer extension with Taq polymerase.

After the amplification step, the temperature is lowered and the specific fluorescent-labelled DNA probe hybridizes with the quencher-labelled amplicon resulting in the decrease of the fluorescent signal. During the melting step, the DNA probe is released leading to the fluorescence increase. The melting temperature of the duplex containing a mismatch is lower than that of fully complementary duplex.

DNA-probe for G(-455)A polymorphism detection is complementary to mutant FGB gene; DNA-probe for G103T polymorphism detection is complementary to mutant F13A1 gene. Thus, the melting temperature is different for two allelic variants. As a result, the genotype for each polymorphism can be identified (normal homozygote, heterozygote, mutant homozygote).