From Analysis:
How does the intron-retained RNA isoform mechanistically reduce glucocerebrosidase protein levels and activity?
Retained intronic sequences contain cryptic nuclear retention elements that recruit export inhibitory complexes (PHAX, AlyREF, UAP56), sequestering the TREX complex on intron-retained transcripts. This depletes the available TREX pool for properly spliced GBA mRNA, causing nuclear accumulation and reduced cytoplasmic export. The model requires the aberrant transcripts to outcompete the far more abundant mature mRNA pool for limited export factors.
No AI visual card yet
Curated pathway diagram from expert analysis
flowchart TD
A["NXF1 TAP
Nuclear Export"]
B["THOC4 AlyREF
Adaptor"]
C["DDX39B UAP56
Helicase"]
D["PHAX
Regulatory Protein"]
E["mRNA Export
Sequestration"]
F["Cytoplasmic
Depletion"]
A --> B
B --> C
C --> D
D --> E
E --> F
style A fill:#004d40,stroke:#80cbc4,color:#80cbc4
style F fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
The research question addresses how a specific intron-retaining transcript of GBA (glucosylceramidase, the gene mutated in Gaucher disease) leads to reduced protein levels and enzymatic activity—a phenomenon particularly relevant given that GBA haploinsufficiency is a major Parkinson's disease risk factor.
Title: Cytoplasmic Intron-Retained GBA Transcripts Stall Ribosomes, Activating Collisional Quality Control That Glob
Based on the critique revision, the hypotheses with sufficient mechanistic support to warrant drug development consideration are:
| Rank | Hypothesis | Revised Confidence | Strategic Priority |
|------|-----------|-------------------|-------------------|
| 1 | RBP Sequestration (H6) | 0.58 | High — neuronal context, established targets |
| 2 | Ribosome Stalling (H1) | 0.52 | High — measurable, actionable pathway |
| 3 | SRP Interference (H7) | 0.52 | Moderate — signal peptide biology is
{"ranked_hypotheses":[{"title":"Dominant-Negative Spliceosome Titration","description":"Intron-retained GBA transcripts sequester core spliceosomal components (U2AF65, SF3B1, PRPF8) and snRNPs, reducing the available pool for wild-type GBA pre-mRNA processing. This cis-trans interference causes inefficient removal of downstream introns, producing additional aberrant transcripts with PTCs that are degraded by NMD, establishing a positive feedback loop that progressively depletes mature GBA mRNA and protein. The mechanism explains why a minority aberrant isoform disproportionately affects prot
No price history recorded yet
No clinical trials data available
Hypotheses receive an efficiency score (0-1) based on how many knowledge graph edges and citations they produce per token of compute spent.
High-efficiency hypotheses (score >= 0.8) get a price premium in the market, pulling their price toward $0.580.
Low-efficiency hypotheses (score < 0.6) receive a discount, pulling their price toward $0.420.
Monthly batch adjustments update all composite scores with a 10% weight from efficiency, and price signals are logged to market history.
No related hypotheses found
Molecular pathway showing key causal relationships underlying this hypothesis
graph TD
GBA_intron_retained_trans["GBA intron-retained transcript"] -->|sequesters| U2AF2["U2AF2"]
GBA_intron_retained_trans_1["GBA intron-retained transcript"] -->|sequesters| SF3B1["SF3B1"]
GBA_intron_retained_trans_2["GBA intron-retained transcript"] -->|sequesters| PRPF8["PRPF8"]
GBA_intron_retained_trans_3["GBA intron-retained transcript"] -->|activates collisio| ZNF598["ZNF598"]
GBA_intron_retained_trans_4["GBA intron-retained transcript"] -->|recruits| GIGYF2["GIGYF2"]
TARDBP__TDP_43__aggregati["TARDBP (TDP-43) aggregation"] -->|disrupts| GBA_intron_retention_clea["GBA intron retention clearance"]
FMR1__FMRP_["FMR1 (FMRP)"] -->|regulates translat| GBA_mRNA["GBA mRNA"]
ELAVL1__HuR_["ELAVL1 (HuR)"] -->|stabilizes| GBA_mRNA_5["GBA mRNA"]
SCARB2__LIMP_2_["SCARB2 (LIMP-2)"] -->|lysosomal traffick| GBA_protein["GBA protein"]
EIF2AK3__PERK_["EIF2AK3 (PERK)"] -->|phosphorylates| EIF2S1__eIF2__["EIF2S1 (eIF2α)"]
EIF2S1__eIF2___phosphoryl["EIF2S1 (eIF2α) phosphorylation"] -.->|suppresses| Cap_dependent_translation["Cap-dependent translation"]
SRP54["SRP54"] -->|recognizes for ER| GBA_signal_peptide["GBA signal peptide"]
style GBA_intron_retained_trans fill:#4fc3f7,stroke:#333,color:#000
style U2AF2 fill:#4fc3f7,stroke:#333,color:#000
style GBA_intron_retained_trans_1 fill:#4fc3f7,stroke:#333,color:#000
style SF3B1 fill:#4fc3f7,stroke:#333,color:#000
style GBA_intron_retained_trans_2 fill:#4fc3f7,stroke:#333,color:#000
style PRPF8 fill:#4fc3f7,stroke:#333,color:#000
style GBA_intron_retained_trans_3 fill:#4fc3f7,stroke:#333,color:#000
style ZNF598 fill:#4fc3f7,stroke:#333,color:#000
style GBA_intron_retained_trans_4 fill:#4fc3f7,stroke:#333,color:#000
style GIGYF2 fill:#4fc3f7,stroke:#333,color:#000
style TARDBP__TDP_43__aggregati fill:#4fc3f7,stroke:#333,color:#000
style GBA_intron_retention_clea fill:#4fc3f7,stroke:#333,color:#000
style FMR1__FMRP_ fill:#4fc3f7,stroke:#333,color:#000
style GBA_mRNA fill:#4fc3f7,stroke:#333,color:#000
style ELAVL1__HuR_ fill:#4fc3f7,stroke:#333,color:#000
style GBA_mRNA_5 fill:#4fc3f7,stroke:#333,color:#000
style SCARB2__LIMP_2_ fill:#4fc3f7,stroke:#333,color:#000
style GBA_protein fill:#4fc3f7,stroke:#333,color:#000
style EIF2AK3__PERK_ fill:#4fc3f7,stroke:#333,color:#000
style EIF2S1__eIF2__ fill:#4fc3f7,stroke:#333,color:#000
style EIF2S1__eIF2___phosphoryl fill:#4fc3f7,stroke:#333,color:#000
style Cap_dependent_translation fill:#4fc3f7,stroke:#333,color:#000
style SRP54 fill:#4fc3f7,stroke:#333,color:#000
style GBA_signal_peptide fill:#4fc3f7,stroke:#333,color:#000
neurodegeneration | 2026-04-26 | completed
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