Extracellular vesicle biomarkers for early AD detection¶
Notebook ID: nb-sda-2026-04-12-ev-ad-biomarkers · Analysis: sda-2026-04-12-ev-ad-biomarkers · Generated: 2026-04-20T13:46:54
Research question¶
Which EV-derived biomarkers (phospho-tau, amyloid-beta, synaptic proteins, inflammatory mediators) show the highest diagnostic accuracy for early/prodromal AD, and what are the key technical challenges in clinical translation?
Approach¶
This notebook is generated programmatically from real Forge tool calls and SciDEX debate data. Forge tools used: PubMed Search, MyGene, STRING PPI, Reactome pathways, Enrichr.
Debate Summary¶
Quality score: 0.75 · Rounds: 4
1. Target gene annotations (MyGene)¶
import pandas as pd
ann_rows = [{'gene': 'EVS', 'name': '—', 'summary': '—'}, {'gene': 'MIRNAS', 'name': 'microRNA 3685', 'summary': 'microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene exp'}]
pd.DataFrame(ann_rows)
2. GO Biological Process enrichment (Enrichr)¶
print('No GO:BP enrichment data available')
3. STRING protein interaction network¶
print('No STRING PPI data available')
4. Reactome pathway footprint¶
pw_rows = [{'gene': 'EVS', 'n_pathways': 0, 'top_pathway': '—'}, {'gene': 'MIRNAS', 'n_pathways': 0, 'top_pathway': '—'}]
pd.DataFrame(pw_rows).sort_values('n_pathways', ascending=False)
5. Hypothesis ranking (2 hypotheses)¶
hyp_data = [('EV-Mediated Epigenetic Reprogramming', 0.665), ('EV-Mediated Epigenetic Reprogramming', 0.661)]
titles = [h[0] for h in hyp_data][::-1]
scores = [h[1] for h in hyp_data][::-1]
fig, ax = plt.subplots(figsize=(10, max(8, len(titles)*0.4)))
colors = ['#ef5350' if s >= 0.6 else '#ffa726' if s >= 0.5 else '#66bb6a' for s in scores]
ax.barh(range(len(titles)), scores, color=colors)
ax.set_yticks(range(len(titles))); ax.set_yticklabels(titles, fontsize=7)
ax.set_xlabel('Composite Score'); ax.set_title('Extracellular vesicle biomarkers for early AD detection')
ax.grid(axis='x', alpha=0.3)
plt.tight_layout(); plt.show()
labels = ['EV-Mediated Epigenetic Reprogramming', 'EV-Mediated Epigenetic Reprogramming']
matrix = np.array([[0.9, 0.7, 0.8, 0.8, 0.4, 0.7, 0.7, 0.7, 0.6], [0.9, 0.7, 0.8, 0.8, 0.0, 0.7, 0.7, 0.7, 0.6]])
dims = ['novelty_score', 'feasibility_score', 'impact_score', 'mechanistic_plausibility_score', 'clinical_relevance_score', 'data_availability_score', 'reproducibility_score', 'druggability_score', 'safety_profile_score']
if matrix.size:
fig, ax = plt.subplots(figsize=(10, 5))
im = ax.imshow(matrix, cmap='RdYlGn', aspect='auto', vmin=0, vmax=1)
ax.set_xticks(range(len(dims)))
ax.set_xticklabels([d.replace('_score','').replace('_',' ').title() for d in dims],
rotation=45, ha='right', fontsize=8)
ax.set_yticks(range(len(labels))); ax.set_yticklabels(labels, fontsize=7)
ax.set_title('Score dimensions — hypotheses')
plt.colorbar(im, ax=ax, shrink=0.8)
plt.tight_layout(); plt.show()
else:
print('No score data available')
6. PubMed literature per hypothesis¶
Hypothesis 1: EV-Mediated Epigenetic Reprogramming¶
Target genes: EVs/miRNAs · Composite score: 0.665
EV-Mediated Epigenetic Reprogramming in Neurodegeneration
Molecular Mechanism¶
Extracellular vesicles (EVs) are lipid bilayer particles secreted by virtually all cell types, including neurons and glia. They carry diverse cargo including microRNAs (miRNAs), mRNAs, proteins, and lipids that can mo
lit_data = [{'year': '2022', 'journal': 'Int J Mol Sci', 'title': 'Circulating Small EVs miRNAs as Predictors of Pathological Response to Neo-Adjuv', 'pmid': '36293478'}, {'year': '2022', 'journal': 'Semin Cancer Biol', 'title': 'miRNAs mediated drug resistance in hematological malignancies.', 'pmid': '33757848'}, {'year': '2022', 'journal': 'Life (Basel)', 'title': 'EVs-miRNA: The New Molecular Markers for Chronic Respiratory Diseases.', 'pmid': '36294979'}, {'year': '2023', 'journal': 'Hum Cell', 'title': 'The role of miRNAs from mesenchymal stem/stromal cells-derived extracellular ves', 'pmid': '36261702'}, {'year': '2022', 'journal': 'J Inflamm Res', 'title': 'The Application of Extracellular Vesicles Mediated miRNAs in Osteoarthritis: Cur', 'pmid': '35479833'}]
if lit_data:
df = pd.DataFrame(lit_data)
print(f'{len(lit_data)} PubMed results')
display(df)
else:
print('No PubMed results')
Hypothesis 2: EV-Mediated Epigenetic Reprogramming¶
Target genes: EVs/miRNAs · Composite score: 0.661
EV-Mediated Epigenetic Reprogramming in Neurodegeneration
Molecular Mechanism¶
Extracellular vesicles (EVs) are lipid bilayer particles secreted by virtually all cell types, including neurons and glia. They carry diverse cargo including microRNAs (miRNAs), mRNAs, proteins, and lipids that can mo
print('No PubMed results for hypothesis h-test-8d254307')
7. Knowledge graph edges (3 total)¶
edge_data = [{'source': 'amyloid_beta', 'relation': 'associated_with', 'target': 'extracellular_vesicles', 'strength': 0.8}, {'source': 'tau', 'relation': 'associated_with', 'target': 'extracellular_vesicles', 'strength': 0.75}, {'source': 'extracellular_vesicles', 'relation': 'biomarker_for', 'target': "Alzheimer's disease", 'strength': 0.7}]
if edge_data:
pd.DataFrame(edge_data).head(25)
else:
print('No KG edge data available')
Caveats¶
This notebook uses real Forge tool calls from live APIs:
- Enrichment is against curated gene-set libraries (Enrichr)
- STRING/Reactome/HPA/MyGene reflect curated knowledge
- PubMed literature is search-relevance ranked, not systematic review