TY - JOUR
T1 - Tomosyn-2 is required for normal motor performance in mice and sustains neurotransmission at motor endplates
AU - Geerts, Cornelia J.
AU - Plomp, Jaap J.
AU - Koopmans, Bastijn
AU - Loos, Maarten
AU - van der Pijl, Elizabeth M.
AU - van der Valk, Martin A.
AU - Verhage, Matthijs
AU - Groffen, Alexander J.A.
AU - van der Pijl, EM
N1 - Funding Information: For excellent technical support we would like to thank Jurjen Broeke, Niels Cornelisse, Joost Hoetjes, Hilde Hopman, Hans Lodder, Rolinka van der Loo, Chris van der Meer, Frank den Oudsten, Desiree Schut, Sabine Spijker, Aafje Vossenaar, Ruud Wijnands, Joke Wortel at the VU and VUmc, as well as staff of the AvL laboratory for Experimental Animal Pathology. We thank Annelies van der Laan and Joop Wiegant for excellent help with laser scanning confocal microscopy at the microscopy facility of the Molecular Cell Biology Department of the LUMC. This study was supported by the EU Eurospin project Health-F2-2009-241498, Synsys project Health-F2-2009-242167 and CMSB2 project 3.3.5. Publisher Copyright: © 2014, Springer-Verlag Berlin Heidelberg.
PY - 2015/7/27
Y1 - 2015/7/27
N2 - Tomosyn-1 (STXBP5) is a soluble NSF attachment protein receptor complex-binding protein that inhibits vesicle fusion, but the role of tomosyn-2 (STXBP5L) in the mammalian nervous system is still unclear. Here we generated tomosyn-2 null (Tom2KO/KO) mice, which showed impaired motor performance. This was accompanied by synaptic changes at the neuromuscular junction, including enhanced spontaneous acetylcholine release frequency and faster depression of muscle motor endplate potentials during repetitive stimulation. The postsynaptic geometric arrangement and function of acetylcholine receptors were normal. We conclude that tomosyn-2 supports motor performance by regulation of transmitter release willingness to sustain synaptic strength during high-frequency transmission, which makes this gene a candidate for involvement in neuromuscular disorders.
AB - Tomosyn-1 (STXBP5) is a soluble NSF attachment protein receptor complex-binding protein that inhibits vesicle fusion, but the role of tomosyn-2 (STXBP5L) in the mammalian nervous system is still unclear. Here we generated tomosyn-2 null (Tom2KO/KO) mice, which showed impaired motor performance. This was accompanied by synaptic changes at the neuromuscular junction, including enhanced spontaneous acetylcholine release frequency and faster depression of muscle motor endplate potentials during repetitive stimulation. The postsynaptic geometric arrangement and function of acetylcholine receptors were normal. We conclude that tomosyn-2 supports motor performance by regulation of transmitter release willingness to sustain synaptic strength during high-frequency transmission, which makes this gene a candidate for involvement in neuromuscular disorders.
KW - Neuromuscular junction
KW - Release willingness
KW - STXBP5L
KW - Short-term plasticity
KW - Synaptic transmission
KW - Tomosyn-2
UR - http://www.scopus.com/inward/record.url?scp=84933177884&partnerID=8YFLogxK
U2 - https://doi.org/10.1007/s00429-014-0766-0
DO - https://doi.org/10.1007/s00429-014-0766-0
M3 - Article
C2 - 24744148
SN - 1863-2653
VL - 220
SP - 1971
EP - 1982
JO - Brain Structure and Function
JF - Brain Structure and Function
IS - 4
ER -
