D Eckert

Publications (2)11.37 Total impact

• Article: Mucopolysaccharidosis type IIID: 12 new patients and 15 novel mutationsb

  Marlies J. Valstar, Aida M. Bertoli-Avella, Marja W. Wessels, George J.G. Ruijter, Bianca de Graaf, Renske Olmer, Peter Elfferich, Sanne Neijs, Roxana Kariminejad, Fatih Suheyl Ezgü, [......], Heymut Omran, D. Eckert, Mirella Filocamo, Emil Simeonov, Patrick J. Willems, Ron A. Wevers, Martinus F. Niermeijer, Dicky J.J. Halley, Ben J.H.M. Poorthuis, Otto P. van Diggelen
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  ABSTRACT: Mucopolysaccharidosis III D (Sanfilippo disease type D, MPS IIID) is a rare autosomal recessive lysosomal storage disorder previously described in only 20 patients. MPS IIID is caused by a deficiency of N-acetylglucosamine-6-sulphate sulphatase (GNS), one of the enzymes required for the degradation of heparan sulphate. So far only seven mutations in the GNS gene have been reported. The clinical phenotype of 12 new MPS IIID patients from 10 families was studied. Mutation analysis of GNS was performed in 16 patients (14 index cases). Clinical signs and symptoms of the MPS IIID patients appeared to be similar to previously described patients with MPS III. Early development was normal with onset of behavioral problems around the age of 4 years, followed by developmental stagnation, deterioration of verbal communication and subsequent deterioration of motor functions. Sequence analysis of the coding regions of the gene encoding GNS (GNS) resulted in the identification of 15 novel mutations: 3 missense mutations, 1 nonsense mutation, 4 splice site mutations, 3 frame shift mutations, 3 large deletions and 1 in-frame small deletion. They include the first missense mutations and a relatively high proportion of large rearrangements, which warrants the inclusion of quantitative techniques in routine mutation screening of the GNS gene. © 2010 Wiley-Liss, Inc.
  Human Mutation 03/2010; 31(5):E1348 - E1360. · 5.69 Impact Factor
• Article: Mucopolysaccharidosis type IIID: 12 new patients and 15 novel mutations.

  Marlies J Valstar, Aida M Bertoli-Avella, Marja W Wessels, George J G Ruijter, Bianca de Graaf, Renske Olmer, Peter Elfferich, Sanne Neijs, Roxana Kariminejad, Fatih Suheyl Ezgü, [......], Heymut Omran, D Eckert, Mirella Filocamo, Emil Simeonov, Patrick J Willems, Ron A Wevers, Martinus F Niermeijer, Dicky J J Halley, Ben J H M Poorthuis, Otto P van Diggelen
  [show abstract] [hide abstract]
  ABSTRACT: Mucopolysaccharidosis III D (Sanfilippo disease type D, MPS IIID) is a rare autosomal recessive lysosomal storage disorder previously described in only 20 patients. MPS IIID is caused by a deficiency of N-acetylglucosamine-6-sulphate sulphatase (GNS), one of the enzymes required for the degradation of heparan sulphate. So far only seven mutations in the GNS gene have been reported. The clinical phenotype of 12 new MPS IIID patients from 10 families was studied. Mutation analysis of GNS was performed in 16 patients (14 index cases). Clinical signs and symptoms of the MPS IIID patients appeared to be similar to previously described patients with MPS III. Early development was normal with onset of behavioral problems around the age of 4 years, followed by developmental stagnation, deterioration of verbal communication and subsequent deterioration of motor functions. Sequence analysis of the coding regions of the gene encoding GNS (GNS) resulted in the identification of 15 novel mutations: 3 missense mutations, 1 nonsense mutation, 4 splice site mutations, 3 frame shift mutations, 3 large deletions and 1 in-frame small deletion. They include the first missense mutations and a relatively high proportion of large rearrangements, which warrants the inclusion of quantitative techniques in routine mutation screening of the GNS gene.
  Human Mutation 03/2010; 31(5):E1348-60. · 5.69 Impact Factor