Alpha synuclein-mediated cytoskeletal dysfunction impairs myelination in human oligodendrocytes
Bibliographic record
Abstract
Oligodendroglial alpha-synuclein (aSyn) deposits are a key feature in the atypical parkinsonian disorder, multiple system atrophy (MSA) linked to profound myelin loss and neurodegeneration while precise cellular and molecular mechanisms remain unclear. We generated human oligodendrocytes (hOLs) from induced pluripotent stem cells to investigate the impact of aSyn on oligodendroglial morphology, differentiation, and function. We observed an aSyn-induced myelinogenic dysfunction characterized by impaired oligodendroglial process outgrowth, altered cell shape, and increased perinuclear accumulation of the tubulin polymerization promoting protein TPPP/p25α. These changes were associated with a reduced capacity to ensheath axons and were linked to compromised actin remodeling machinery. Actin imbalances were confirmed in post-mortem putaminal tissue from MSA patients. Treatment with a rho-associated protein kinase inhibitor rescued oligodendroglial process formation and improved ensheathment in aSyn-expressing hOLs. Our work emphasizes the aSyn-mediated interference with actin dynamics as a key pathogenic mechanism in MSA, pointing toward a novel therapeutic target for improving myelin maintenance.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".