Naslov
Molecular analysis of HEXA gene in Argentinean patients affected with Tay–Sachs disease: Possible common origin of the prevalent c.459 + 5A>G mutation

Autori
Zampieri, Stefania ; Montalvo, Annalisa ; Blanco, Mariana ; Zanin, Irene ; Amartino, Hernan ; Vlahoviček, Kristian ; Szlago, Marina ; Schenone, Andrea ; Pittis, Gabriela ; Bembi, Bruno ; Dardis, Andrea

Izvornik
Gene (0378-1119) 499 (2012), 2; 262-265

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
GM2 gangliosidosis; Mutational analysis; Haplotype analysis

Sažetak
Tay–Sachs disease (TSD) is a recessively inherited disorder caused by the deficient activity of hexosaminidase A due to mutations in the HEXA gene. Up to date there is no information regarding the molecular genetics of TSD in Argentinean patients. In the present study we have studied 17 Argentinean families affected by TSD, including 20 patients with the acute infantile form and 3 with the sub-acute form. Overall, we identified 14 different mutations accounting for 100% of the studied alleles. Eight mutations were novel: 5 were single base changes leading to drastic residue changes or truncated proteins, 2 were small deletions and one was an intronic mutation that may cause a splicing defect. Although the spectrum of mutations was highly heterogeneous, a high frequency of the c.459 + 5G>A mutation, previously described in different populations was found among the studied cohort. Haplotype analysis suggested that in these families the c.459 + 5G>A mutation might have arisen by a single mutational event.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Temeljne medicinske znanosti

POVEZANOST RADA