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Title: De novo RYR1 heterozygous mutation (I4898T) causing lethal core-rod myopathy in twins
Authors: Hernandez-Lain, Aurelio ×
Husson, Isabelle
Monnier, Nicole
Farnoux, Caroline
Brochier, Guy
Lacène, Emmanuelle
Beuvin, Maud
Viou, Mait
Manéré, Linda
Claeys, Kristl
Fardeau, Michel
Lunardi, Joël
Voit, Thomas
Romero, Norma Beatriz #
Issue Date: 2011
Publisher: Elsevier
Series Title: European Journal of Medical Genetics vol:54 issue:1
Article number: 10.1016/j.ejmg.2010.09.009
Abstract: "Core-rod myopathy" is a rare congenital myopathy characterized by the presence of "cores" and "rods" in distinct locations in the same or different muscle fibres. This association is linked currently to mutations in RYR1, NEB and ACTA1 genes. We report identical twins who presented with polyhydramnios and loss of fetal motility during pregnancy; hypotonia, arthrogryposis and swallowing impairment at birth; need of immediate respiratory support and death at 27 and 50 days of life. Muscle biopsies, performed at 27 days of life in twin 1 and at 49 days in twin 2, showed the presence of separate cores and rods in the muscle fibres, both at light and electron microscopy. The molecular analysis showed a heterozygous de novo mutation (Ile4898Thr) of the RYR1 gene. The molecular study of ACTA1, TMP2 and TMP3 genes did not show abnormalities. This is the first report of a lethal form of congenital "core-rod myopathy". The mutation Ile4898Thr has been previously described in central core disease but not in core-rod myopathy. The report enlarges the phenotypic spectrum of "core-rod myopathy" and highlights the morphological variability associated to special RYR1 mutations.
URI: 
ISSN: 1769-7212
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Faculty of Medicine - miscellaneous
× corresponding author
# (joint) last author

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