Microheterogeneity in the distribution of the 844ins68 in the cystathionine β-synthase gene in Italy

Betti Giusti, Olga Camacho-Vanegas, Monica Attanasio, Paolo Comeglio, Anna Maria Gori, Tamara Brunelli, Domenico Prisco, Gian Franco Gensini, Rosanna Abbate, Guglielmina Pepe

Research output: Contribution to journalArticlepeer-review


Cystathionine β-synthase (CBS) is an important enzyme for methionine metabolism. A common 844ins68 insertion variant in the CBS gene has been described. This 68-bp duplication of the intron 7-exon 8 boundary within the CBS gene already has been reported to be associated in cis with the T833C mutation. Heterozygosity for CBS deficiency is considered an important cause of hyperhomocysteinemia that strongly relates to cardiovascular disease, as well as homozygosity for another common variant, the C677T mutation of 5,10- methylene tetrahydrofolate reductase. We analysed the prevalence of the 844ins68 variant in the CBS gene in 595 unrelated apparently healthy individuals from nine Italian regions and in 133 patients with coronary artery disease. Our data Confirm that the T833C mutation cosegregates in cis with the 844ins68 in all carriers of the insertion. Furthermore, no statistical difference was found in the insertion variant allete frequency between controls and coronary artery disease patients. Our study indicates a microheterogeneity in the distribution of the 844ins68 in the Italian population.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalThrombosis Research
Issue number4
Publication statusPublished - May 15 1999


  • Anthropological DNA marker
  • Cystathionine β-synthase
  • Microheterogeneity

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Hematology


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