ID: hyp-SDA-2026-04-08-gap-pubmed-20260406-0
Hypothesis
Hippocampal ADCY8 Upregulation for Alzheimer's Navigation Deficits
Since spatial navigation deficits are early Alzheimer's symptoms, targeted upregulation of ADCY8 specifically in hippocampal place cells could restore spatial memory encoding.
memory and navigation
EvidencePending (0%)📖 3 cit🗣 1 debates✓ 3 support✗ 1 oppose
✓ All Quality Gates Passed
🧪 Overview
Since spatial navigation deficits are early Alzheimer's symptoms, targeted upregulation of ADCY8 specifically in hippocampal place cells could restore spatial memory encoding. This approach would leverage the evolutionary conservation of memory-based navigation systems identified in migratory species.
🧬 Mechanism
🔗 Mechanism from KG for ADCY8
Auto-built from this analysis's top knowledge-graph edges.
graph TD
ADCY8["ADCY8"] -->|produces| cAMP["cAMP"]
ADCY8_1["ADCY8"] -->|modulates| spatial_navigation["spatial_navigation"]
ADCY8_2["ADCY8"] -->|activates| PKA_CREB_signaling_cascad["PKA-CREB signaling cascade"]
ADCY8_3["ADCY8"] -->|regulates| long_term_spatial_memory_["long-term spatial memory formation"]
ADCY8_4["ADCY8"] -->|activates| cAMP_signaling["cAMP signaling"]
ADCY8_5["ADCY8"] -->|activates| PKA["PKA"]
ADCY8_6["ADCY8"] -->|regulates| spatial_memory_formation["spatial memory formation"]
ADCY8_7["ADCY8"] -->|regulates| hippocampus["hippocampus"]
ADCY8_8["ADCY8"] -->|causes| long_term_spatial_memory__9["long_term_spatial_memory_formation"]
ADCY8_10["ADCY8"] -->|modulates| epigenetic_programming["epigenetic_programming"]
ADCY8_11["ADCY8"] -->|protective against| navigation_disorders["navigation_disorders"]
ADCY8_12["ADCY8"] -->|modulates| synaptic_plasticity["synaptic_plasticity"]
ADCY8_13["ADCY8"] -->|enhances| adenylyl_cyclase_activity["adenylyl_cyclase_activity"]
ADCY8_14["ADCY8"] -->|couples with| circadian_rhythms["circadian_rhythms"]
ADCY8_variants["ADCY8 variants"] -->|enhances| cAMP_dependent_memory_con["cAMP-dependent memory consolidation"]
style ADCY8 fill:#ce93d8,stroke:#333,color:#000
style cAMP fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_1 fill:#ce93d8,stroke:#333,color:#000
style spatial_navigation fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_2 fill:#ce93d8,stroke:#333,color:#000
style PKA_CREB_signaling_cascad fill:#81c784,stroke:#333,color:#000
style ADCY8_3 fill:#ce93d8,stroke:#333,color:#000
style long_term_spatial_memory_ fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_4 fill:#ce93d8,stroke:#333,color:#000
style cAMP_signaling fill:#81c784,stroke:#333,color:#000
style ADCY8_5 fill:#ce93d8,stroke:#333,color:#000
style PKA fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_6 fill:#ce93d8,stroke:#333,color:#000
style spatial_memory_formation fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_7 fill:#ce93d8,stroke:#333,color:#000
style hippocampus fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_8 fill:#ce93d8,stroke:#333,color:#000
style long_term_spatial_memory__9 fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_10 fill:#ce93d8,stroke:#333,color:#000
style epigenetic_programming fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_11 fill:#ce93d8,stroke:#333,color:#000
style navigation_disorders fill:#ef5350,stroke:#333,color:#000
style ADCY8_12 fill:#ce93d8,stroke:#333,color:#000
style synaptic_plasticity fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_13 fill:#ce93d8,stroke:#333,color:#000
style adenylyl_cyclase_activity fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_14 fill:#ce93d8,stroke:#333,color:#000
style circadian_rhythms fill:#4fc3f7,stroke:#333,color:#000
style ADCY8_variants fill:#ce93d8,stroke:#333,color:#000
style cAMP_dependent_memory_con fill:#4fc3f7,stroke:#333,color:#000⚖️ Evidence
⚖️ Evidence Matrix3 supports0 contradicts
Supports
Gene-expression changes in cerium chloride-induced injury of mouse hippocampus.
Supports
Assessment of genes involved in behavior, learning, memory, and synaptic plasticity following status epilepticus in rats.
Supports
Temporal and regional regulation of gene expression by calcium-stimulated adenylyl cyclase activity during fear memory.
📖 Linked Papers
No linked papers recorded for this hypothesis yet.
🏥 Translation
🧬 3D Protein Structure — ADCY8
No curated PDB or AlphaFold mapping for ADCY8 yet. Search RCSB →
💉 Clinical Trials
No clinical trials data linked to this hypothesis yet.
No curated ClinVar variants loaded for this hypothesis.
Run scripts/backfill_clinvar_variants.py to fetch P/LP/VUS variants.
No DepMap CRISPR Chronos data found for ADCY8.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
🏆 Tournament
🏆 Arenas / Elo
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📊 Market Indicators
7d Trend
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Stable
7d Momentum
▲ 0.0%
Volatility
High
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Events (7d)
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Price History
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LLM Tokens
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Total Cost
$0.0421
🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF hippocampal ADCY8 protein expression is quantified via ELISA in postmortem dorsomedial entorhinal cortex tissue from early-stage Alzheimer's patients (Braak III-IV, n≥30) compared to age-matched co | ≥30% reduction in ADCY8 protein in early AD entorhinal cortex; positive correlation with spatial memory scores | — no observation — | pending | 0.45 |
| IF AAV-mediated selective upregulation of ADCY8 (≥2-fold) is achieved specifically in CA1 place cells of 6-month-old APP/PS1 Alzheimer's model mice, THEN spatial navigation performance in the Morris w | ≥20% improvement in Morris water maze escape latency in ADCY8-upregulated mice vs. controls | — no observation — | pending | 0.35 |
🔮 Falsifiable Predictions (2)
pendingconf 45%
IF hippocampal ADCY8 protein expression is quantified via ELISA in postmortem dorsomedial entorhinal cortex tissue from early-stage Alzheimer's patients (Braak III-IV, n≥30) compared to age-matched controls, THEN ADCY8 levels will be significantly reduced (≥30% decrease) in Alzheimer's patients and
Predicted outcome: ≥30% reduction in ADCY8 protein in early AD entorhinal cortex; positive correlation with spatial memory scores
Falsification: ADCY8 levels in early AD tissue are equal to or higher than controls, or no correlation exists between ADCY8 expression and spatial memory scores (r < 0.3)
pendingconf 35%
IF AAV-mediated selective upregulation of ADCY8 (≥2-fold) is achieved specifically in CA1 place cells of 6-month-old APP/PS1 Alzheimer's model mice, THEN spatial navigation performance in the Morris water maze will improve by ≥20% (reduced latency to platform) compared to GFP-expressing controls wit
Predicted outcome: ≥20% improvement in Morris water maze escape latency in ADCY8-upregulated mice vs. controls
Falsification: No significant difference in Morris water maze performance between ADCY8-upregulated and control groups (p > 0.05), despite confirmed AAV-mediated ADCY8 overexpression in CA1 place cells
▸Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesis
| source | v1_phase_c_backfill |
| origin_type | debate_synthesis |
| _schema_version | 1 |
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting
0 contradicting
0 neutral
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