PXD063154

PXD063154 is an original dataset announced via ProteomeXchange.

Title	Motor neuron synaptosomes LC-MSMS
Description	Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease causing progressive dysfunction and degeneration of upper and lower motor neurons. An increasing body of evidence has identified synaptic alterations in patients and experimental models of ALS. Importantly, these have been associated with functional impairments in motor neuron networks, suggesting that synaptic impairments are early events in the disease cascade resulting in functional compensatory reconfigurations. The synapse may therefore represent a disease-modifying target to delay disease progression. In this study, we aimed to stabilize synapses and modify structural connectivity to restore network balance in ALS patient-derived motor neuron networks. To this end, we blocked the potassium channels using tetraethylammonium (TEA) which has been shown to induce chemical long-term potentiation (cLTP). The unperturbed ALS patient-derived motor neuron networks developed clear signs of subtle network dysfunction, including increased firing rate and bursting, and accompanying structural abnormalities. These features were partially restored by temporarily blocking the potassium channels. Specifically, the TEA-treated ALS networks were characterized by a reduction in aberrant branching and stabilization of dendritic spines, alongside a temporary reduction in firing rate and bursting. Furthermore, protein expression assays revealed restoration of dysregulated molecular pathways, including protein synthesis and metabolic pathways, and upregulation of pathways involved in synapse organization in the TEA-treated ALS networks. This is one of the first studies to integrate synaptic potentiation, proteomics, and functional network analysis of human ALS motor neurons. Collectively, these findings improve our understanding of the association between synaptic impairments and functional alterations in ALS, and demonstrate the therapeutic potential of targeting neuronal excitability and plasticity to promote network balance.
HostingRepository	PRIDE
AnnounceDate	2025-09-15
AnnouncementXML	Submission_2025-09-15_06:25:21.355.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Anna Mikalsen Kollstrøm
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	acetylated residue; monohydroxylated residue; deamidated residue
Instrument	timsTOF Pro

Revision	Datetime	Status	ChangeLog Entry
0	2025-04-21 09:13:50	ID requested
⏵ 1	2025-09-15 06:25:22	announced

Kollstr, ø, m AM, Gr, ø, nlie MB, Christiansen N, Sandvig A, Sandvig I, Induced long-term potentiation improves synaptic stability and restores network function in ALS motor neurons. Neurobiol Dis, 216():107077(2025) [pubmed]

10.1016/j.nbd.2025.107077;

submitter keyword: Human, LC-MSMS, iPSCs, motor neurons

Ioanna Sandvig
contact affiliation	Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Norway
contact email	ioanna.sandvig@ntnu.no
lab head
Anna Mikalsen Kollstrøm
contact affiliation	Norwegian University of Science and Technology
contact email	anna.m.kollstrom@ntnu.no
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD063154
     1. Label: PRIDE project
     2. Name: Motor neuron synaptosomes LC-MSMS