During early development, tau predominates to maximize plasticity and rapid axon extension; as maturation proceeds, MAP6 increasingly dominates to establish long-term stability
Prediction: The tau:MAP6 ratio on microtubules shifts progressively during development, with temporal coincidence of domain segregation correlating with developmental transitions
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Curated Mechanism Pathway
Curated pathway diagram from expert analysis
flowchart TD
A["MAPT/Tau Protein Microtubule Stabilizer"]
B["CDK5/GSK3B Activation Kinase Dysregulation"]
C["Tau Hyperphosphorylation Ser396/Thr231/Ser202"]
D["Tau Detachment Microtubule Destabilized"]
E["Tau Oligomers Paired Helical Filaments"]
F["Neurofibrillary Tangles Intraneuronal Inclusions"]
G["Axonal Transport Failure Synaptic Dysfunction"]
H["Neurodegeneration Tauopathy Spread"]
A --> B
B --> C
C --> D
D --> E
E --> F
D --> G
G --> H
F --> H
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style C fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
style H fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
Median TPM across 13 brain regions for MAPT from GTEx v10.
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8 citations7 with PMID7 mediumValidation: 0%6 supporting / 2 opposing
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Evidence Matrix — sortable by strength/year, click Abstract to expand
Evidence Types
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PMIDs
Abstract
Antagonistic roles of tau and MAP6 in regulating n…
During early development, tau predominates to maxi…
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Legacy Card View — expandable citation cards
✓ Supporting Evidence
6
During early development, tau predominates to maximize plasticity and rapid axon extension; as maturation proc…▼
During early development, tau predominates to maximize plasticity and rapid axon extension; as maturation proceeds, MAP6 increasingly dominates to establish long-term stability
Antagonistic roles of tau and MAP6 in regulating neuronal development.MEDIUM
Tau/MAP6 antagonism is shown in neuronal development models, but this does not establish that the same balance…MEDIUM▼
Tau/MAP6 antagonism is shown in neuronal development models, but this does not establish that the same balance drives adult neurodegeneration progression or treatment response.
A microtubule-stabilizing peptide strategy failed to show clinical benefit in progressive supranuclear palsy, …MEDIUM▼
A microtubule-stabilizing peptide strategy failed to show clinical benefit in progressive supranuclear palsy, cautioning against simple cytoskeletal-stabilization translation in tauopathy.
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IF we measure tau and MAP6 protein levels on assembled microtubules across postnatal development in mice (E18, P7, P14, P30, P90), THEN the tau:MAP6 ratio on microtubules will decrease progressively by approximately 50-70% from early (E18-P7) to mature (P30-P90) stages.
pendingconf: 0.70
Expected outcome: Progressive decrease in tau:MAP6 ratio on microtubule fraction; tau levels decline while MAP6 levels increase
Falsified by: The tau:MAP6 ratio remains constant or increases during development, contradicting the predicted shift toward MAP6 dominance
Method: Western blot quantification of microtubule-bound vs. soluble fractions from mouse cortical/hippocampal tissue at five developmental timepoints (n=6 per stage)
IF we perform tau knockdown in cultured hippocampal neurons derived from early postnatal mice (P0-P2) versus mature mice (P21-P28), THEN overexpression of MAP6 will fully rescue axon extension defects in mature neurons but only partially in early neurons, while tau overexpression will show the opposite pattern.
pendingconf: 0.65
Expected outcome: At P0-P2 neurons: tau rescue >80% of control axon length, MAP6 rescue <40%. At P21-P28 neurons: MAP6 rescue >80% of control axon length, tau rescue <40%
Falsified by: Both tau and MAP6 rescue axon extension equally at both developmental stages, indicating functional redundancy without temporal specificity
Method: Primary hippocampal neuron cultures from two age groups, transfected with tau siRNA or MAP6 siRNA followed by AAV-mediated overexpression of the complementary protein; axon length quantified after 3 days in vitro via MAP2 immunostaining