Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Auer-Grumbach, M; Olschewski, A; Papić, L; Kremer, H; McEntagart, ME; Uhrig, S; Fischer, C; Fröhlich, E; Bálint, Z; Tang, B; Strohmaier, H; Lochmüller, H; Schlotter-Weigel, B; Senderek, J; Krebs, A; Dick, KJ; Petty, R; Longman, C; Anderson, NE; Padberg, GW; Schelhaas, HJ; van Ravenswaaij-Arts, CM; Pieber, TR; Crosby, AH; Guelly, C.
Alterations in the ankyrin domain of TRPV4 cause congenital distal SMA, scapuloperoneal SMA and HMSN2C.
Nat Genet. 2010; 42(2):160-164
Doi: 10.1038/ng.508
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- Führende Autor*innen der Med Uni Graz
- Auer-Grumbach Michaela
- Co-Autor*innen der Med Uni Graz
- Balint Zoltan
- Fischer Carina
- Fröhlich Eleonore
- Gülly Christian
- Krebs Angelika
- Olschewski Andrea
- Papic Lea
- Pieber Thomas
- Strohmaier Heimo
- Tang Bi
- Uhrig Sabine
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- Abstract:
- Spinal muscular atrophies (SMA, also known as hereditary motor neuropathies) and hereditary motor and sensory neuropathies (HMSN) are clinically and genetically heterogeneous disorders of the peripheral nervous system. Here we report that mutations in the TRPV4 gene cause congenital distal SMA, scapuloperoneal SMA, HMSN 2C. We identified three missense substitutions (R269H, R315W and R316C) affecting the intracellular N-terminal ankyrin domain of the TRPV4 ion channel in five families. Expression of mutant TRPV4 constructs in cells from the HeLa line revealed diminished surface localization of mutant proteins. In addition, TRPV4-regulated Ca(2+) influx was substantially reduced even after stimulation with 4alphaPDD, a TRPV4 channel-specific agonist, and with hypo-osmotic solution. In summary, we describe a new hereditary channelopathy caused by mutations in TRPV4 and present evidence that the resulting substitutions in the N-terminal ankyrin domain affect channel maturation, leading to reduced surface expression of functional TRPV4 channels.
- Find related publications in this database (using NLM MeSH Indexing)
- Amino Acid Substitution - genetics
- Ankyrin Repeat -
- Calcium - metabolism
- HeLa Cells -
- Hereditary Sensory and Motor Neuropathy - complications
- Hereditary Sensory and Motor Neuropathy - genetics
- Hereditary Sensory and Motor Neuropathy - physiopathology
- Humans -
- Immunohistochemistry -
- Intracellular Space - metabolism
- Ion Channel Gating -
- Models, Molecular -
- Molecular Sequence Data -
- Muscular Atrophy, Spinal - complications
- Muscular Atrophy, Spinal - congenital
- Muscular Atrophy, Spinal - genetics
- Muscular Atrophy, Spinal - physiopathology
- Mutant Proteins - metabolism
- Mutation - genetics
- Osmosis -
- TRPV Cation Channels - chemistry
- TRPV Cation Channels - genetics
- Transfection -