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Seven Novel Acid Sphingomyelinase Gene Mutations in Niemann‐Pick Type A and B Patients
Author(s) -
Sikora J.,
PavluPereira H.,
Elleder M.,
Roelofs H.,
Wevers R. A.
Publication year - 2003
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1046/j.1469-1809.2003.00009.x
Subject(s) - acid sphingomyelinase , compound heterozygosity , genetics , mutation , biology , gene , gene mutation , point mutation , microbiology and biotechnology , sphingomyelin , membrane
Summary We have analyzed acid sphingomyelinase ( SMPD1 ; E.C. 3.1.4.12) gene mutations in four Niemann‐Pick disease (NPD) type A and B patients of Turkish ancestry and in three patients of Dutch origin. Among four NPD type A patients we found two homozygotes for the g.1421C > T (H319Y) and g.3714T > C (Y537H) mutations and two compound heterozygotes, one for the g.3337T > C (F463S) and g.3373C > T (P475L) mutations and the other for the g.84delC (G29fsX74) and g.1208A > C (S248R) mutations. One of the type B patients was homozygous for the g.2629C>T (P371S) mutation. The last two type B patients were homozygotes for the common g.3927_3929delCGC (R608del) mutation. The G29fsX74, S248R, H319Y, P371S, F463S, P475L and Y537H SMPD1 mutations are all novel and were verified by PCR/RFLP and/or ARMS. All of the identified mutations are likely to be rare or private, with the exception of R608del which is prevalent among NPD type B patients from the North‐African Maghreb region. Geographical and/or social isolation of the affected families are likely contributing factors for the high number of homozygotes in our group.