Danon disease: a novel Lamp-2 gene mutation in a family with four affected members.
This is a report of a family with four members affected with Danon disease and variable clinical presentations, including cardiomyopathy, skeletal muscle pathology, and hepatopathy. Analysis by electron microscopy of the quadriceps muscle from the proband and his brother showed abnormal mitochondria, and immunohistochemistry revealed no expression of LAMP-2 protein. This defect is due to a yet undescribed mutation located at the second nucleotide in the intron 8 of the Lamp-2 gene (c.1093+2 T>A) that generated exon 8 skipping confirmed at RNA level in the proband.
Department of Pathology, Hospital of Navarra, Navarra Health Service, Spain. mtunonal@cfnavarra.es
T
T
Tuñón
D
D
Guerrero
A
A
Urchaga
I
I
Nishino
T
T
Ayuso
Y
Y
Matsuda
M C
MC
Caballero
J
J
Berjón
M A
MA
Imizcoz
D000293:Adolescent; D000328:Adult; D001706:Biopsy; D005192:Family Health; D005260:Female; D052120:Glycogen Storage Disease Type IIb / Q000235:genetics* / Q000473:pathology; D006801:Humans; D007438:Introns / Q000235:genetics; D052119:Lysosomal-Associated Membrane Protein 2; D051907:Lysosomal Membrane Proteins / Q000235:genetics*; D008297:Male; D008854:Microscopy, Electron; D009206:Myocardium / Q000473:pathology / Q000648:ultrastructure; D010375:Pedigree; D052097:Quadriceps Muscle / Q000473:pathology / Q000648:ultrastructure; D035781:Siblings
C497811:LAMP2 protein, human; D052119:Lysosomal-Associated Membrane Protein 2; D051907:Lysosomal Membrane Proteins