Angelika Bátorová, Denisa Jankovičová, Ján Lazúr, Tatiana Prigancová, Philippe de Moerloos, Marquerite Neerman-Arbez, Mária Kušíková, Martin Mistrík
Inherited fibrinogen (FBG) disordes represent rare blood coagulation disorders. Discovery of molecular basis and structural
and funcional characteristics of FBG is a key for undersranding of significant variability of clinical manifestation of
these disorders. The National Registry of Congenital Coagulopathies accounts a total of 268 individials with congenital
FBG disorders, among them 1, 77 and 190 individuals with afibrinogenemia, hypofibrinogenemia (hypoFBG) and dysfibrinogenemia
(dysFBG), respectively. We analysed clinical phenotype and genotype in 91 and 28 subjects, respectively.
Out of 75 subjects dysFBG with a median FBG: coag 0,74g/l and FBG: Ag 2,81 g/l, 53%, 41 % and 8 % were asymptomatic,
experienced bleeding and thrombosis, respectively. Out of 16 hypoFBG persons with FBG: coag 1,1 g/l and FBG:
Ag 1,1 g/l, 38 % 38 %, 44 % and 18 % were asymptomatic, had bleeding and thrombosis, respectively, with combined
phenotype in two patients. Genotype analysis in 20 dysFBGs revealed two heterozygous mutations on the exon 2 of the
FGA gene: 13 individuals/3 families had frequent mutation AαArg16His and 6 subjects/2 families had mutation AαGly-
13Glu. In hypoFBG 2 novel mutations on FGG gene were identified: one subject with mutation on exon 7 γTrp253Cys
and 6 persons/3 families had mutation on exon 1 γTrp3→Stop. Variability of phenotype did not allow to establish the
genotype-phenotype correlations. At present, genetic analysis enables to confirm the diagnosis, to reveal potential carriers
and to perform prenatal diagnosis.