What is the temporal sequence of TREM2 signaling transition from protective to inflammatory during aging?¶
Notebook ID: nb-SDA-2026-04-15-gap-debate-20260410-112522-57d1cc4f · Analysis: SDA-2026-04-15-gap-debate-20260410-112522-57d1cc4f · Generated: 2026-04-21T18:43:21
Research question¶
While TREM2 was identified as critical for microglial senescence, the debate lacked fine-grained temporal data on when and how TREM2 signaling shifts from neuroprotective to pathogenic. Understanding this transition timing is essential for intervention strategies.
Source: Debate session sess_SDA-2026-04-02-gap-aging-mouse-brain-v5-20260402 (Analysis: SDA-2026-04-02-gap-aging-mouse-brain-v5-20260402)
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: 0.73 · Rounds: 4
1. Target gene annotations (MyGene)¶
import pandas as pd
ann_rows = [{'gene': 'ACAT1', 'name': 'acetyl-CoA acetyltransferase 1', 'summary': 'This gene encodes a mitochondrially localized enzyme that catalyzes the reversible formation of acetoacetyl-CoA from two'}, {'gene': 'ADAM10', 'name': 'ADAM metallopeptidase domain 10', 'summary': 'Members of the ADAM family are cell surface proteins with a unique structure possessing both potential adhesion and prot'}, {'gene': 'LXR', 'name': 'cancer/testis associated transcript 70', 'summary': '—'}, {'gene': 'STREM2', 'name': '—', 'summary': '—'}, {'gene': 'TREM2', 'name': 'triggering receptor expressed on myeloid cells 2', 'summary': 'This gene encodes a membrane protein that forms a receptor signaling complex with the TYRO protein tyrosine kinase bindi'}]
pd.DataFrame(ann_rows)
| gene | name | summary | |
|---|---|---|---|
| 0 | ACAT1 | acetyl-CoA acetyltransferase 1 | This gene encodes a mitochondrially localized ... |
| 1 | ADAM10 | ADAM metallopeptidase domain 10 | Members of the ADAM family are cell surface pr... |
| 2 | LXR | cancer/testis associated transcript 70 | — |
| 3 | STREM2 | — | — |
| 4 | TREM2 | triggering receptor expressed on myeloid cells 2 | This gene encodes a membrane protein that form... |
2. GO Biological Process enrichment (Enrichr)¶
go_bp = [{'rank': 1, 'term': 'Leukocyte Apoptotic Process (GO:0071887)', 'p_value': 0.0004999362185987752, 'odds_ratio': 4998.5, 'genes': ['HCAR2']}, {'rank': 2, 'term': 'Regulation Of Adiponectin Secretion (GO:0070163)', 'p_value': 0.000599909243874975, 'odds_ratio': 3998.6, 'genes': ['HCAR2']}, {'rank': 3, 'term': 'Positive Regulation Of Myeloid Cell Apoptotic Process (GO:0033034)', 'p_value': 0.0006998773712248138, 'odds_ratio': 3332.0, 'genes': ['HCAR2']}, {'rank': 4, 'term': 'Glucosamine-Containing Compound Catabolic Process (GO:1901072)', 'p_value': 0.0007998405838081707, 'odds_ratio': 2855.8571428571427, 'genes': ['CHI3L1']}, {'rank': 5, 'term': 'Positive Regulation Of Leukocyte Apoptotic Process (GO:2000108)', 'p_value': 0.0008997988691311835, 'odds_ratio': 2498.75, 'genes': ['HCAR2']}, {'rank': 6, 'term': 'Activation Of NF-kappaB-inducing Kinase Activity (GO:0007250)', 'p_value': 0.0014994446955652384, 'odds_ratio': 1427.4285714285713, 'genes': ['CHI3L1']}, {'rank': 7, 'term': 'Negative Regulation Of Lipid Catabolic Process (GO:0050995)', 'p_value': 0.0017992006270532422, 'odds_ratio': 1175.3529411764705, 'genes': ['HCAR2']}, {'rank': 8, 'term': 'Positive Regulation Of Hormone Secretion (GO:0046887)', 'p_value': 0.001899109329170248, 'odds_ratio': 1110.0, 'genes': ['HCAR2']}, {'rank': 9, 'term': 'Regulation Of Lipid Catabolic Process (GO:0050994)', 'p_value': 0.0022986943824153676, 'odds_ratio': 908.0, 'genes': ['HCAR2']}, {'rank': 10, 'term': 'Positive Regulation Of Peptidyl-Threonine Phosphorylation (GO:0010800)', 'p_value': 0.00239857819994348, 'odds_ratio': 868.4782608695652, 'genes': ['CHI3L1']}]
go_df = pd.DataFrame(go_bp)[['term','p_value','odds_ratio','genes']]
go_df['p_value'] = go_df['p_value'].apply(lambda p: f'{p:.2e}')
go_df['odds_ratio'] = go_df['odds_ratio'].round(1)
go_df['term'] = go_df['term'].str[:60]
go_df['n_hits'] = go_df['genes'].apply(len)
go_df['genes'] = go_df['genes'].apply(lambda g: ', '.join(g))
go_df[['term','n_hits','p_value','odds_ratio','genes']]
| term | n_hits | p_value | odds_ratio | genes | |
|---|---|---|---|---|---|
| 0 | Leukocyte Apoptotic Process (GO:0071887) | 1 | 5.00e-04 | 4998.5 | HCAR2 |
| 1 | Regulation Of Adiponectin Secretion (GO:0070163) | 1 | 6.00e-04 | 3998.6 | HCAR2 |
| 2 | Positive Regulation Of Myeloid Cell Apoptotic ... | 1 | 7.00e-04 | 3332.0 | HCAR2 |
| 3 | Glucosamine-Containing Compound Catabolic Proc... | 1 | 8.00e-04 | 2855.9 | CHI3L1 |
| 4 | Positive Regulation Of Leukocyte Apoptotic Pro... | 1 | 9.00e-04 | 2498.8 | HCAR2 |
| 5 | Activation Of NF-kappaB-inducing Kinase Activi... | 1 | 1.50e-03 | 1427.4 | CHI3L1 |
| 6 | Negative Regulation Of Lipid Catabolic Process... | 1 | 1.80e-03 | 1175.4 | HCAR2 |
| 7 | Positive Regulation Of Hormone Secretion (GO:0... | 1 | 1.90e-03 | 1110.0 | HCAR2 |
| 8 | Regulation Of Lipid Catabolic Process (GO:0050... | 1 | 2.30e-03 | 908.0 | HCAR2 |
| 9 | Positive Regulation Of Peptidyl-Threonine Phos... | 1 | 2.40e-03 | 868.5 | CHI3L1 |
import matplotlib.pyplot as plt
import numpy as np
go_bp = [{'rank': 1, 'term': 'Leukocyte Apoptotic Process (GO:0071887)', 'p_value': 0.0004999362185987752, 'odds_ratio': 4998.5, 'genes': ['HCAR2']}, {'rank': 2, 'term': 'Regulation Of Adiponectin Secretion (GO:0070163)', 'p_value': 0.000599909243874975, 'odds_ratio': 3998.6, 'genes': ['HCAR2']}, {'rank': 3, 'term': 'Positive Regulation Of Myeloid Cell Apoptotic Process (GO:0033034)', 'p_value': 0.0006998773712248138, 'odds_ratio': 3332.0, 'genes': ['HCAR2']}, {'rank': 4, 'term': 'Glucosamine-Containing Compound Catabolic Process (GO:1901072)', 'p_value': 0.0007998405838081707, 'odds_ratio': 2855.8571428571427, 'genes': ['CHI3L1']}, {'rank': 5, 'term': 'Positive Regulation Of Leukocyte Apoptotic Process (GO:2000108)', 'p_value': 0.0008997988691311835, 'odds_ratio': 2498.75, 'genes': ['HCAR2']}, {'rank': 6, 'term': 'Activation Of NF-kappaB-inducing Kinase Activity (GO:0007250)', 'p_value': 0.0014994446955652384, 'odds_ratio': 1427.4285714285713, 'genes': ['CHI3L1']}, {'rank': 7, 'term': 'Negative Regulation Of Lipid Catabolic Process (GO:0050995)', 'p_value': 0.0017992006270532422, 'odds_ratio': 1175.3529411764705, 'genes': ['HCAR2']}, {'rank': 8, 'term': 'Positive Regulation Of Hormone Secretion (GO:0046887)', 'p_value': 0.001899109329170248, 'odds_ratio': 1110.0, 'genes': ['HCAR2']}]
terms = [t['term'][:45] for t in go_bp][::-1]
neglogp = [-np.log10(max(t['p_value'], 1e-300)) for t in go_bp][::-1]
fig, ax = plt.subplots(figsize=(9, 4.5))
ax.barh(terms, neglogp, color='#4fc3f7')
ax.set_xlabel('-log10(p-value)')
ax.set_title('Top GO:BP enrichment (Enrichr)')
ax.grid(axis='x', alpha=0.3)
plt.tight_layout(); plt.show()
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Matplotlib created a temporary cache directory at /tmp/matplotlib-lapcwmlb because there was an issue with the default path (/home/ubuntu/.config/matplotlib); it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing.
3. STRING protein interaction network¶
print('No STRING PPI data available')
No STRING PPI data available
4. Reactome pathway footprint¶
pw_rows = [{'gene': 'ACAT1', 'n_pathways': 6, 'top_pathway': 'Branched-chain amino acid catabolism'}, {'gene': 'ADAM10', 'n_pathways': 8, 'top_pathway': 'Collagen degradation'}, {'gene': 'LXR', 'n_pathways': 0, 'top_pathway': '—'}, {'gene': 'STREM2', 'n_pathways': 0, 'top_pathway': '—'}, {'gene': 'TREM2', 'n_pathways': 4, 'top_pathway': 'Immunoregulatory interactions between a Lymphoid and a non-Lymphoid ce'}]
pd.DataFrame(pw_rows).sort_values('n_pathways', ascending=False)
| gene | n_pathways | top_pathway | |
|---|---|---|---|
| 1 | ADAM10 | 8 | Collagen degradation |
| 0 | ACAT1 | 6 | Branched-chain amino acid catabolism |
| 4 | TREM2 | 4 | Immunoregulatory interactions between a Lympho... |
| 2 | LXR | 0 | — |
| 3 | STREM2 | 0 | — |
5. Hypothesis ranking (2 hypotheses)¶
hyp_data = [('CSF sTREM2 as Pharmacodynamic Biomarker for Therapeutic', 0.801), ('TREM2 R47H Metabolic Lock-in at Cholesterol Ester Accum', 0.672)]
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('What is the temporal sequence of TREM2 signaling transition from protective to inflammatory during aging?')
ax.grid(axis='x', alpha=0.3)
plt.tight_layout(); plt.show()
labels = ['CSF sTREM2 as Pharmacodynamic Biomarker ', 'TREM2 R47H Metabolic Lock-in at Choleste']
matrix = np.array([[0.6, 0.85, 0.88, 0.82, 0.0, 0.72, 0.78, 0.9, 0.95], [0.65, 0.55, 0.72, 0.75, 0.0, 0.75, 0.78, 0.6, 0.4]])
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: CSF sTREM2 as Pharmacodynamic Biomarker for Therapeutic Window Identif¶
Target genes: sTREM2/membrane-TREM2/ADAM10 · Composite score: 0.801
CSF sTREM2 as Pharmacodynamic Biomarker for Therapeutic Window Identification¶
Mechanistic Foundations of TREM2 Biology¶
The triggering receptor expressed on myeloid cells 2 (TREM2) is a cell-surface receptor predominantly expressed on microglia within the central nervous system, where it serve
print('No PubMed results for hypothesis h-7d24e096')
No PubMed results for hypothesis h-7d24e096
Hypothesis 2: TREM2 R47H Metabolic Lock-in at Cholesterol Ester Accumulation¶
Target genes: TREM2/ACAT1/LXR · Composite score: 0.672
TREM2 R47H Metabolic Lock-in at Cholesterol Ester Accumulation: A Unifying Mechanism for Microglial Dysfunction in Alzheimer's Disease¶
The Mechanistic Core: A Ligand-Binding Defect with Systemic Metabolic Consequences¶
The single nucleotide polymorphism encoding the TREM2 R47H variant confers
print('No PubMed results for hypothesis h-76ea1f28')
No PubMed results for hypothesis h-76ea1f28
7. Knowledge graph edges (3 total)¶
edge_data = [{'source': 'sTREM2/membrane-TREM2/ADAM10', 'relation': 'promoted: CSF sTREM2 as P', 'target': 'neuroimmunology', 'strength': 0.67}, {'source': 'TREM2/ACAT1/LXR', 'relation': 'promoted: TREM2 R47H Meta', 'target': 'neuroimmunology', 'strength': 0.56}, {'source': 'APOE', 'relation': 'co_discussed', 'target': 'ERK', 'strength': 0.4}]
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