Research output: Contribution to journal › Article › Academic › peer-review
Clinical, neuroradiological and genetic findings in pontocerebellar hypoplasia. / Namavar, Yasmin; Barth, Peter G.; Kasher, Paul R. et al.
In: Brain, Vol. 134, No. Part 1, 2011, p. 143-156.Research output: Contribution to journal › Article › Academic › peer-review
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TY - JOUR
T1 - Clinical, neuroradiological and genetic findings in pontocerebellar hypoplasia
AU - Namavar, Yasmin
AU - Barth, Peter G.
AU - Kasher, Paul R.
AU - van Ruissen, Fred
AU - Brockmann, Knut
AU - Bernert, Günther
AU - Writzl, Karin
AU - Ventura, Karen
AU - Cheng, Edith Y.
AU - Ferriero, Donna M.
AU - Basel-Vanagaite, Lina
AU - Eggens, Veerle R. C.
AU - Krägeloh-Mann, Ingeborg
AU - de Meirleir, Linda
AU - King, Mary
AU - Graham, John M.
AU - von Moers, Arpad
AU - Knoers, Nine
AU - Sztriha, Laszlo
AU - Korinthenberg, Rudolf
AU - Dobyns, William B.
AU - Baas, Frank
AU - Poll-The, Bwee Tien
AU - AUTHOR GROUP
AU - van der Aa, Nathalie
AU - Arts, Willem F. M.
AU - Ades, Lesley C.
AU - Bahi-Buisson, Nadia
AU - Battini, Roberta
AU - Bodamer, Olaf
AU - Boltshauser, Eugen
AU - Boycott, Kym
AU - Brueton, Louise
AU - Brussel, Wim
AU - Chandler, K. E.
AU - Cowan, Frances M.
AU - Crow, Yanick
AU - Debus, Otfried
AU - Demir, Ercan
AU - Hastanesi, Gazi
AU - Eason, Jacqueline
AU - Ferrie, Colin D.
AU - Fisher, Richard B.
AU - Foulds, Nicola
AU - Freeman, Jeremy L.
AU - Gooskens, Rob
AU - Haeussler, Martin
AU - Hageman, Gerard
AU - Hammersen, Gerhard
AU - Horn, Denise
AU - Tijssen, Marina A. J.
PY - 2011
Y1 - 2011
N2 - Pontocerebellar hypoplasia is a group of autosomal recessive neurodegenerative disorders with prenatal onset. The common characteristics are cerebellar hypoplasia with variable atrophy of the cerebellum and the ventral pons. Supratentorial involvement is reflected by variable neocortical atrophy, ventriculomegaly and microcephaly. Mutations in the transfer RNA splicing endonuclease subunit genes (TSEN54, TSEN2, TSEN34) were found to be associated with pontocerebellar hypoplasia types 2 and 4. Mutations in the mitochondrial transfer RNA arginyl synthetase gene (RARS2) were associated with pontocerebellar hypoplasia type 6. We studied a cohort of 169 patients from 141 families for mutations in these genes, of whom 106 patients tested positive for mutations in one of the TSEN genes or the RARS2 gene. In order to delineate the neuroradiological and clinical phenotype of patients with mutations in these genes, we compared this group with 63 patients suspected of pontocerebellar hypoplasia who were negative on mutation analysis. We found a strong correlation (P <0.0005) between TSEN54 mutations and a dragonfly-like cerebellar pattern on magnetic resonance imaging, in which the cerebellar hemispheres are flat and severely reduced in size and the vermis is relatively spared. Mutations in TSEN54 are clinically associated with dyskinesia and/or dystonia and variable degrees of spasticity, in some cases with pure generalized spasticity. Nonsense or splice site mutations in TSEN54 are associated with a more severe phenotype of more perinatal symptoms, ventilator dependency and early death. In addition, we present ten new mutations in TSEN54, TSEN2 and RARS2. Furthermore, we show that pontocerebellar hypoplasia type 1 together with elevated cerebrospinal fluid lactate may be caused by RARS2 mutations
AB - Pontocerebellar hypoplasia is a group of autosomal recessive neurodegenerative disorders with prenatal onset. The common characteristics are cerebellar hypoplasia with variable atrophy of the cerebellum and the ventral pons. Supratentorial involvement is reflected by variable neocortical atrophy, ventriculomegaly and microcephaly. Mutations in the transfer RNA splicing endonuclease subunit genes (TSEN54, TSEN2, TSEN34) were found to be associated with pontocerebellar hypoplasia types 2 and 4. Mutations in the mitochondrial transfer RNA arginyl synthetase gene (RARS2) were associated with pontocerebellar hypoplasia type 6. We studied a cohort of 169 patients from 141 families for mutations in these genes, of whom 106 patients tested positive for mutations in one of the TSEN genes or the RARS2 gene. In order to delineate the neuroradiological and clinical phenotype of patients with mutations in these genes, we compared this group with 63 patients suspected of pontocerebellar hypoplasia who were negative on mutation analysis. We found a strong correlation (P <0.0005) between TSEN54 mutations and a dragonfly-like cerebellar pattern on magnetic resonance imaging, in which the cerebellar hemispheres are flat and severely reduced in size and the vermis is relatively spared. Mutations in TSEN54 are clinically associated with dyskinesia and/or dystonia and variable degrees of spasticity, in some cases with pure generalized spasticity. Nonsense or splice site mutations in TSEN54 are associated with a more severe phenotype of more perinatal symptoms, ventilator dependency and early death. In addition, we present ten new mutations in TSEN54, TSEN2 and RARS2. Furthermore, we show that pontocerebellar hypoplasia type 1 together with elevated cerebrospinal fluid lactate may be caused by RARS2 mutations
U2 - 10.1093/brain/awq287
DO - 10.1093/brain/awq287
M3 - Article
C2 - 20952379
VL - 134
SP - 143
EP - 156
JO - Brain
JF - Brain
SN - 0006-8950
IS - Part 1
ER -
ID: 1331710