A tau PTM barcode gates trans-synaptic templating

Mechanistic description

Specific combinations of tau phosphorylation, acetylation, and truncation mark assemblies that evade degradation and template after synaptic transfer. Altering the PTM barcode should convert seed-competent tau into transferable but weakly pathogenic tau.

Mechanism / pathway

MAPT
→
tau post-translational modification
→
neurodegeneration

Evidence for (7)

The release and trans-synaptic transmission of Tau via exosomes
Tau phosphorylation and truncation literature
MAPT mutations, tauopathy, and mechanisms of neurodegeneration.

PMID:30742061 2019 Lab Invest
Interactions between Microtubule-Associated Protein Tau (MAPT) and Small Molecules.

PMID:27940599 2017 Cold Spring Harb Perspect Med
Tau-targeting antisense oligonucleotide MAPT(Rx) in mild Alzheimer's disease: a phase 1b, randomized, placebo-controlled trial.

PMID:37095250 2023 Nat Med
Tau filaments with the Alzheimer fold in human MAPT mutants V337M and R406W.

PMID:40044789 2025 Nat Struct Mol Biol
Isoform-specific patterns of tau burden and neuronal degeneration in MAPT-associated frontotemporal lobar degeneration.

PMID:36066634 2022 Acta Neuropathol

Evidence against (2)

Alzheimer Disease: An Update on Pathobiology and Treatment Strategies.

PMID:31564456 2019 Cell

Evidence matrix

5 supporting 1 contradicting

53% posterior support

Supporting

MAPT mutations, tauopathy, and mechanisms of neurodegeneration. PMID:30742061 · 2019 · Lab Invest
Interactions between Microtubule-Associated Protein Tau (MAPT) and Small Molecules. PMID:27940599 · 2017 · Cold Spring Harb Perspect Med
Tau-targeting antisense oligonucleotide MAPT(Rx) in mild Alzheimer's disease: a phase 1b, randomized, placebo-controlled trial. PMID:37095250 · 2023 · Nat Med
Tau filaments with the Alzheimer fold in human MAPT mutants V337M and R406W. PMID:40044789 · 2025 · Nat Struct Mol Biol
Isoform-specific patterns of tau burden and neuronal degeneration in MAPT-associated frontotemporal lobar degeneration. PMID:36066634 · 2022 · Acta Neuropathol

Contradicting

Alzheimer Disease: An Update on Pathobiology and Treatment Strategies. PMID:31564456 · 2019 · Cell

Bayesian persona consensus

53% posterior support

1 signal · 1 for / 0 against · agreement 100%

scidex.consensus.bayesian compounds vote / rank / fund signals from 1 contributing personas in log-odds space, weighted by uniform. Prior 50%.

Cite this hypothesis

Citation

etl-backfill (2026). A tau PTM barcode gates trans-synaptic templating. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-fde8ac75360e

BibTeX

@misc{scidex_hypothesis_hfde8ac7,
  title        = {A tau PTM barcode gates trans-synaptic templating},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-fde8ac75360e},
  note         = {SciDEX artifact hypothesis:h-fde8ac75360e}
}