Epigenetic reprogramming in aging neurons¶
Notebook ID: nb-SDA-2026-04-04-gap-epigenetic-reprog-b685190e · Analysis: SDA-2026-04-04-gap-epigenetic-reprog-b685190e · Generated: 2026-04-26T23:48:22
Research question¶
Investigate mechanisms of epigenetic reprogramming in aging neurons, including DNA methylation changes, histone modification dynamics, chromatin remodeling, and partial reprogramming approaches (e.g., Yamanaka factors) to reverse age-related epigenetic alterations in post-mitotic neurons.
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: 0.95 · Rounds: 4
1. Target gene annotations (MyGene + Human Protein Atlas)¶
import pandas as pd
ann_rows = [{'gene': 'BRD4', 'name': 'bromodomain containing 4', 'protein_class': "['Cancer-related genes', 'Disease related genes', 'Essential", 'disease_involvement': "['Cancer-related genes', 'Disease variant', 'Intellectual disability']"}, {'gene': 'HDAC', 'name': 'SIN3-HDAC complex associated factor', 'protein_class': '—', 'disease_involvement': '—'}, {'gene': 'HDAC3', 'name': 'histone deacetylase 3', 'protein_class': "['Enzymes', 'Essential proteins', 'FDA approved drug targets", 'disease_involvement': "['FDA approved drug targets']"}, {'gene': 'NAMPT', 'name': 'nicotinamide phosphoribosyltransferase', 'protein_class': "['Cancer-related genes', 'Enzymes', 'Metabolic proteins', 'P", 'disease_involvement': "['Cancer-related genes']"}, {'gene': 'OCT4', 'name': 'OCT4 hESC enhancer GRCh37_chr10:133148496-133148998', 'protein_class': '—', 'disease_involvement': '—'}, {'gene': 'SIRT1', 'name': 'sirtuin 1', 'protein_class': "['Enzymes', 'Metabolic proteins', 'Predicted intracellular p", 'disease_involvement': '—'}, {'gene': 'SIRT3', 'name': 'sirtuin 3', 'protein_class': "['Enzymes', 'Metabolic proteins', 'Predicted intracellular p", 'disease_involvement': '—'}, {'gene': 'SMARCA4', 'name': 'SWI/SNF related BAF chromatin remodeling complex subunit ATP', 'protein_class': "['Cancer-related genes', 'Disease related genes', 'Human dis", 'disease_involvement': "['Cancer-related genes', 'Deafness', 'Disease variant', 'Intellectual disability"}, {'gene': 'TET2', 'name': 'tet methylcytosine dioxygenase 2', 'protein_class': "['Cancer-related genes', 'Disease related genes', 'Enzymes',", 'disease_involvement': "['Cancer-related genes', 'Disease variant', 'Tumor suppressor']"}]
pd.DataFrame(ann_rows)
| gene | name | protein_class | disease_involvement | |
|---|---|---|---|---|
| 0 | BRD4 | bromodomain containing 4 | ['Cancer-related genes', 'Disease related gene... | ['Cancer-related genes', 'Disease variant', 'I... |
| 1 | HDAC | SIN3-HDAC complex associated factor | — | — |
| 2 | HDAC3 | histone deacetylase 3 | ['Enzymes', 'Essential proteins', 'FDA approve... | ['FDA approved drug targets'] |
| 3 | NAMPT | nicotinamide phosphoribosyltransferase | ['Cancer-related genes', 'Enzymes', 'Metabolic... | ['Cancer-related genes'] |
| 4 | OCT4 | OCT4 hESC enhancer GRCh37_chr10:133148496-1331... | — | — |
| 5 | SIRT1 | sirtuin 1 | ['Enzymes', 'Metabolic proteins', 'Predicted i... | — |
| 6 | SIRT3 | sirtuin 3 | ['Enzymes', 'Metabolic proteins', 'Predicted i... | — |
| 7 | SMARCA4 | SWI/SNF related BAF chromatin remodeling compl... | ['Cancer-related genes', 'Disease related gene... | ['Cancer-related genes', 'Deafness', 'Disease ... |
| 8 | TET2 | tet methylcytosine dioxygenase 2 | ['Cancer-related genes', 'Disease related gene... | ['Cancer-related genes', 'Disease variant', 'T... |
2. GO Biological Process enrichment (Enrichr)¶
go_bp = [{'rank': 1, 'term': 'Protein Deacylation (GO:0035601)', 'p_value': 7.154717101473363e-08, 'odds_ratio': 587.4705882352941, 'genes': ['HDAC3', 'SIRT1', 'SIRT3']}, {'rank': 2, 'term': 'Protein Deacetylation (GO:0006476)', 'p_value': 6.173082690121319e-07, 'odds_ratio': 269.64864864864865, 'genes': ['HDAC3', 'SIRT1', 'SIRT3']}, {'rank': 3, 'term': 'Positive Regulation Of Transcription By RNA Polymerase II (GO:0045944)', 'p_value': 7.790433066335926e-07, 'odds_ratio': 40.89914163090129, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}, {'rank': 4, 'term': 'Peptidyl-Lysine Deacetylation (GO:0034983)', 'p_value': 3.7754993322284675e-06, 'odds_ratio': 1142.057142857143, 'genes': ['SIRT1', 'SIRT3']}, {'rank': 5, 'term': 'Positive Regulation Of DNA-templated Transcription (GO:0045893)', 'p_value': 4.065006033168612e-06, 'odds_ratio': 30.321746160064674, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}, {'rank': 6, 'term': 'Negative Regulation Of Androgen Receptor Signaling Pathway (GO:0060766)', 'p_value': 1.633405632897404e-05, 'odds_ratio': 475.6904761904762, 'genes': ['SIRT1', 'SMARCA4']}, {'rank': 7, 'term': 'Regulation Of Androgen Receptor Signaling Pathway (GO:0060765)', 'p_value': 6.281272926601724e-05, 'odds_ratio': 228.18285714285713, 'genes': ['SIRT1', 'SMARCA4']}, {'rank': 8, 'term': 'Regulation Of Transcription By RNA Polymerase II (GO:0006357)', 'p_value': 6.91357556918871e-05, 'odds_ratio': 17.773491592482692, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}, {'rank': 9, 'term': 'Negative Regulation Of Intracellular Steroid Hormone Receptor Signaling Pathway (GO:0033144)', 'p_value': 8.313599120396748e-05, 'odds_ratio': 196.66995073891624, 'genes': ['SIRT1', 'SMARCA4']}, {'rank': 10, 'term': 'Histone Deacetylation (GO:0016575)', 'p_value': 0.00011250476197410829, 'odds_ratio': 167.7058823529412, 'genes': ['HDAC3', 'SIRT1']}]
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 | Protein Deacylation (GO:0035601) | 3 | 7.15e-08 | 587.5 | HDAC3, SIRT1, SIRT3 |
| 1 | Protein Deacetylation (GO:0006476) | 3 | 6.17e-07 | 269.6 | HDAC3, SIRT1, SIRT3 |
| 2 | Positive Regulation Of Transcription By RNA Po... | 6 | 7.79e-07 | 40.9 | HDAC3, NAMPT, TET2, SIRT1, BRD4, SMARCA4 |
| 3 | Peptidyl-Lysine Deacetylation (GO:0034983) | 2 | 3.78e-06 | 1142.1 | SIRT1, SIRT3 |
| 4 | Positive Regulation Of DNA-templated Transcrip... | 6 | 4.07e-06 | 30.3 | HDAC3, NAMPT, TET2, SIRT1, BRD4, SMARCA4 |
| 5 | Negative Regulation Of Androgen Receptor Signa... | 2 | 1.63e-05 | 475.7 | SIRT1, SMARCA4 |
| 6 | Regulation Of Androgen Receptor Signaling Path... | 2 | 6.28e-05 | 228.2 | SIRT1, SMARCA4 |
| 7 | Regulation Of Transcription By RNA Polymerase ... | 6 | 6.91e-05 | 17.8 | HDAC3, NAMPT, TET2, SIRT1, BRD4, SMARCA4 |
| 8 | Negative Regulation Of Intracellular Steroid H... | 2 | 8.31e-05 | 196.7 | SIRT1, SMARCA4 |
| 9 | Histone Deacetylation (GO:0016575) | 2 | 1.13e-04 | 167.7 | HDAC3, SIRT1 |
import matplotlib.pyplot as plt
import numpy as np
go_bp = [{'rank': 1, 'term': 'Protein Deacylation (GO:0035601)', 'p_value': 7.154717101473363e-08, 'odds_ratio': 587.4705882352941, 'genes': ['HDAC3', 'SIRT1', 'SIRT3']}, {'rank': 2, 'term': 'Protein Deacetylation (GO:0006476)', 'p_value': 6.173082690121319e-07, 'odds_ratio': 269.64864864864865, 'genes': ['HDAC3', 'SIRT1', 'SIRT3']}, {'rank': 3, 'term': 'Positive Regulation Of Transcription By RNA Polymerase II (GO:0045944)', 'p_value': 7.790433066335926e-07, 'odds_ratio': 40.89914163090129, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}, {'rank': 4, 'term': 'Peptidyl-Lysine Deacetylation (GO:0034983)', 'p_value': 3.7754993322284675e-06, 'odds_ratio': 1142.057142857143, 'genes': ['SIRT1', 'SIRT3']}, {'rank': 5, 'term': 'Positive Regulation Of DNA-templated Transcription (GO:0045893)', 'p_value': 4.065006033168612e-06, 'odds_ratio': 30.321746160064674, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}, {'rank': 6, 'term': 'Negative Regulation Of Androgen Receptor Signaling Pathway (GO:0060766)', 'p_value': 1.633405632897404e-05, 'odds_ratio': 475.6904761904762, 'genes': ['SIRT1', 'SMARCA4']}, {'rank': 7, 'term': 'Regulation Of Androgen Receptor Signaling Pathway (GO:0060765)', 'p_value': 6.281272926601724e-05, 'odds_ratio': 228.18285714285713, 'genes': ['SIRT1', 'SMARCA4']}, {'rank': 8, 'term': 'Regulation Of Transcription By RNA Polymerase II (GO:0006357)', 'p_value': 6.91357556918871e-05, 'odds_ratio': 17.773491592482692, 'genes': ['HDAC3', 'NAMPT', 'TET2', 'SIRT1', 'BRD4', 'SMARCA4']}]
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()
3. STRING protein interaction network¶
ppi = [{'protein1': 'SIRT1', 'protein2': 'SMARCA4', 'score': 0.422, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0, 'dscore': 0, 'tscore': 0.423}, {'protein1': 'SIRT1', 'protein2': 'BRD4', 'score': 0.578, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.255}, {'protein1': 'POU5F1', 'protein2': 'SMARCA4', 'score': 0.57, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0, 'dscore': 0, 'tscore': 0.57}, {'protein1': 'BRD4', 'protein2': 'SMARCA4', 'score': 0.709, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.487}, {'protein1': 'HDAC3', 'protein2': 'HDAC9', 'score': 0.511, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.137}, {'protein1': 'SMARCA4', 'protein2': 'HDAC9', 'score': 0.893, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.292, 'dscore': 0, 'tscore': 0.856}]
ppi_df = pd.DataFrame(ppi).sort_values('score', ascending=False)
display_cols = [c for c in ['protein1','protein2','score','escore','tscore'] if c in ppi_df.columns]
print(f'{len(ppi_df)} STRING edges')
ppi_df[display_cols].head(20)
6 STRING edges
| protein1 | protein2 | score | escore | tscore | |
|---|---|---|---|---|---|
| 5 | SMARCA4 | HDAC9 | 0.893 | 0.292 | 0.856 |
| 3 | BRD4 | SMARCA4 | 0.709 | 0.457 | 0.487 |
| 1 | SIRT1 | BRD4 | 0.578 | 0.457 | 0.255 |
| 2 | POU5F1 | SMARCA4 | 0.570 | 0.000 | 0.570 |
| 4 | HDAC3 | HDAC9 | 0.511 | 0.457 | 0.137 |
| 0 | SIRT1 | SMARCA4 | 0.422 | 0.000 | 0.423 |
import math
ppi = [{'protein1': 'SIRT1', 'protein2': 'SMARCA4', 'score': 0.422, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0, 'dscore': 0, 'tscore': 0.423}, {'protein1': 'SIRT1', 'protein2': 'BRD4', 'score': 0.578, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.255}, {'protein1': 'POU5F1', 'protein2': 'SMARCA4', 'score': 0.57, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0, 'dscore': 0, 'tscore': 0.57}, {'protein1': 'BRD4', 'protein2': 'SMARCA4', 'score': 0.709, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.487}, {'protein1': 'HDAC3', 'protein2': 'HDAC9', 'score': 0.511, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.457, 'dscore': 0, 'tscore': 0.137}, {'protein1': 'SMARCA4', 'protein2': 'HDAC9', 'score': 0.893, 'nscore': 0, 'fscore': 0, 'pscore': 0, 'ascore': 0, 'escore': 0.292, 'dscore': 0, 'tscore': 0.856}]
if ppi:
nodes = sorted({p for e in ppi for p in (e['protein1'], e['protein2'])})
n = len(nodes)
pos = {n_: (math.cos(2*math.pi*i/n), math.sin(2*math.pi*i/n)) for i, n_ in enumerate(nodes)}
fig, ax = plt.subplots(figsize=(7, 7))
for e in ppi:
x1,y1 = pos[e['protein1']]; x2,y2 = pos[e['protein2']]
ax.plot([x1,x2],[y1,y2], color='#888', alpha=0.3+0.5*e.get('score',0))
for name,(x,y) in pos.items():
ax.scatter([x],[y], s=450, color='#ffd54f', edgecolors='#333', zorder=3)
ax.annotate(name, (x,y), ha='center', va='center', fontsize=8, fontweight='bold', zorder=4)
ax.set_aspect('equal'); ax.axis('off')
ax.set_title(f'STRING PPI network ({len(ppi)} edges)')
plt.tight_layout(); plt.show()
4. Reactome pathway footprint¶
pw_rows = [{'gene': 'BRD4', 'n_pathways': 1, 'top_pathway': 'Potential therapeutics for SARS'}, {'gene': 'HDAC', 'n_pathways': 0, 'top_pathway': '—'}, {'gene': 'HDAC3', 'n_pathways': 8, 'top_pathway': 'p75NTR negatively regulates cell cycle via SC1'}, {'gene': 'NAMPT', 'n_pathways': 3, 'top_pathway': 'BMAL1:CLOCK,NPAS2 activates circadian expression'}, {'gene': 'OCT4', 'n_pathways': 7, 'top_pathway': 'POU5F1 (OCT4), SOX2, NANOG repress genes related to differentiation'}, {'gene': 'SIRT1', 'n_pathways': 8, 'top_pathway': 'Regulation of HSF1-mediated heat shock response'}, {'gene': 'SIRT3', 'n_pathways': 5, 'top_pathway': 'Transcriptional activation of mitochondrial biogenesis'}, {'gene': 'SMARCA4', 'n_pathways': 8, 'top_pathway': 'Interleukin-7 signaling'}, {'gene': 'TET2', 'n_pathways': 2, 'top_pathway': 'TET1,2,3 and TDG demethylate DNA'}]
pd.DataFrame(pw_rows).sort_values('n_pathways', ascending=False)
| gene | n_pathways | top_pathway | |
|---|---|---|---|
| 2 | HDAC3 | 8 | p75NTR negatively regulates cell cycle via SC1 |
| 7 | SMARCA4 | 8 | Interleukin-7 signaling |
| 5 | SIRT1 | 8 | Regulation of HSF1-mediated heat shock response |
| 4 | OCT4 | 7 | POU5F1 (OCT4), SOX2, NANOG repress genes relat... |
| 6 | SIRT3 | 5 | Transcriptional activation of mitochondrial bi... |
| 3 | NAMPT | 3 | BMAL1:CLOCK,NPAS2 activates circadian expression |
| 8 | TET2 | 2 | TET1,2,3 and TDG demethylate DNA |
| 0 | BRD4 | 1 | Potential therapeutics for SARS |
| 1 | HDAC | 0 | — |
5. Hypothesis ranking (9 hypotheses)¶
hyp_data = [('Nutrient-Sensing Epigenetic Circuit Reactivation', 0.969), ('Chromatin Remodeling-Mediated Nutrient Sensing Restorat', 0.914), ('Selective HDAC3 Inhibition with Cognitive Enhancement', 0.779), ('Chromatin Accessibility Restoration via BRD4 Modulation', 0.768), ('Metabolic NAD+ Salvage Pathway Enhancement Through NAMP', 0.745), ('Astrocyte-Mediated Neuronal Epigenetic Rescue', 0.725), ('Mitochondrial-Nuclear Epigenetic Cross-Talk Restoration', 0.701), ('Partial Neuronal Reprogramming via Modified Yamanaka Co', 0.672), ('Temporal TET2-Mediated Hydroxymethylation Cycling', 0.657)]
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('Epigenetic reprogramming in aging neurons')
ax.grid(axis='x', alpha=0.3)
plt.tight_layout(); plt.show()
6. Score dimension heatmap (top 10)¶
labels = ['Nutrient-Sensing Epigenetic Circuit Reac', 'Chromatin Remodeling-Mediated Nutrient S', 'Selective HDAC3 Inhibition with Cognitiv', 'Chromatin Accessibility Restoration via ', 'Metabolic NAD+ Salvage Pathway Enhanceme', 'Astrocyte-Mediated Neuronal Epigenetic R', 'Mitochondrial-Nuclear Epigenetic Cross-T', 'Partial Neuronal Reprogramming via Modif', 'Temporal TET2-Mediated Hydroxymethylatio']
matrix = np.array([[0.7, 0.95, 0.85, 0.9, 0.115, 0.9, 0.85, 0.9, 0.8], [0.72, 0.92, 0.82, 0.9, 0.115, 0.9, 0.85, 0.9, 0.8], [0.85, 0.7, 0.8, 0.75, 0.062, 0.75, 0.7, 0.75, 0.55], [0.9, 0.6, 0.7, 0.65, 0.13, 0.7, 0.65, 0.95, 0.35], [0.68, 0.84, 0.77, 0.9, 0.115, 0.9, 0.85, 0.9, 0.8], [0.95, 0.4, 0.75, 0.7, 0.135, 0.6, 0.5, 0.3, 0.4], [0.85, 0.5, 0.65, 0.6, 0.4, 0.65, 0.55, 0.5, 0.6], [0.95, 0.2, 0.8, 0.4, 0.42, 0.55, 0.35, 0.15, 0.25], [0.95, 0.25, 0.7, 0.55, 0.26, 0.6, 0.45, 0.2, 0.45]])
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 — top hypotheses')
plt.colorbar(im, ax=ax, shrink=0.8)
plt.tight_layout(); plt.show()
else:
print('No score data available')
7. PubMed literature per hypothesis¶
Hypothesis 1: Nutrient-Sensing Epigenetic Circuit Reactivation¶
Target genes: SIRT1 · Composite score: 0.969
Mechanistic Overview¶
Nutrient-Sensing Epigenetic Circuit Reactivation starts from the claim that modulating SIRT1 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "Molecular Mechanism and Rationale The nutrient-sensing ep
print('No PubMed results for hypothesis h-4bb7fd8c')
No PubMed results for hypothesis h-4bb7fd8c
Hypothesis 2: Chromatin Remodeling-Mediated Nutrient Sensing Restoration¶
Target genes: SMARCA4 · Composite score: 0.914
Mechanistic Overview¶
Chromatin Remodeling-Mediated Nutrient Sensing Restoration starts from the claim that modulating SMARCA4 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "Molecular Mechanism and Rationale The nutrien
print('No PubMed results for hypothesis h-var-a09491064e')
No PubMed results for hypothesis h-var-a09491064e
Hypothesis 3: Selective HDAC3 Inhibition with Cognitive Enhancement¶
Target genes: HDAC3 · Composite score: 0.779
Mechanistic Overview¶
Selective HDAC3 Inhibition with Cognitive Enhancement starts from the claim that modulating HDAC3 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "Molecular Mechanism and Rationale Histone deacetylas
print('No PubMed results for hypothesis h-0e675a41')
No PubMed results for hypothesis h-0e675a41
Hypothesis 4: Chromatin Accessibility Restoration via BRD4 Modulation¶
Target genes: BRD4 · Composite score: 0.768
Mechanistic Overview¶
Chromatin Accessibility Restoration via BRD4 Modulation starts from the claim that modulating BRD4 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "Molecular Mechanism and Rationale BRD4 functions as
lit_data = [{'year': '2025', 'journal': 'Eur J Med Chem', 'title': 'Discovery of 4,5-dihydro-benzo[g]indazole-based hydroxamic acids as HDAC3/BRD4 d', 'pmid': '39764880'}, {'year': '2019', 'journal': 'Bioorg Chem', 'title': 'Design, synthesis and biological evaluation of novel indole derivatives as poten', 'pmid': '30554080'}, {'year': '2019', 'journal': 'J Neurosci', 'title': 'Enhancement of BDNF Expression and Memory by HDAC Inhibition Requires BET Bromod', 'pmid': '30504275'}]
if lit_data:
df = pd.DataFrame(lit_data)
print(f'{len(lit_data)} PubMed results')
display(df)
else:
print('No PubMed results')
3 PubMed results
| year | journal | title | pmid | |
|---|---|---|---|---|
| 0 | 2025 | Eur J Med Chem | Discovery of 4,5-dihydro-benzo[g]indazole-base... | 39764880 |
| 1 | 2019 | Bioorg Chem | Design, synthesis and biological evaluation of... | 30554080 |
| 2 | 2019 | J Neurosci | Enhancement of BDNF Expression and Memory by H... | 30504275 |
Hypothesis 5: Metabolic NAD+ Salvage Pathway Enhancement Through NAMPT Overexpressio¶
Target genes: NAMPT · Composite score: 0.745
Molecular Mechanism and Rationale
The NAD+ salvage pathway represents a critical metabolic hub in neuronal energy homeostasis, with NAMPT functioning as the pivotal rate-limiting enzyme that governs cellular NAD+ availability. NAMPT catalyzes the condensation of nicotinamide with 5-phosphoribos
print('No PubMed results for hypothesis h-var-159030513d')
No PubMed results for hypothesis h-var-159030513d
Hypothesis 6: Astrocyte-Mediated Neuronal Epigenetic Rescue¶
Target genes: HDAC · Composite score: 0.725
1. Molecular Mechanism and Rationale¶
The fundamental premise underlying astrocyte-mediated neuronal epigenetic rescue centers on the strategic manipulation of histone deacetylase (HDAC) activity through engineered paracrine signaling. HDACs comprise a family of 18 zinc-dependent enzymes divided
print('No PubMed results for hypothesis h-8fe389e8')
No PubMed results for hypothesis h-8fe389e8
Hypothesis 7: Mitochondrial-Nuclear Epigenetic Cross-Talk Restoration¶
Target genes: SIRT3 · Composite score: 0.701
Mechanistic Overview¶
Mitochondrial-Nuclear Epigenetic Cross-Talk Restoration starts from the claim that modulating SIRT3 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "## Molecular Mechanism and Rationale The mitochondrial
print('No PubMed results for hypothesis h-0e614ae4')
No PubMed results for hypothesis h-0e614ae4
Hypothesis 8: Partial Neuronal Reprogramming via Modified Yamanaka Cocktail¶
Target genes: OCT4 · Composite score: 0.672
Mechanistic Overview¶
Partial Neuronal Reprogramming via Modified Yamanaka Cocktail starts from the claim that modulating OCT4 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "The hypothesis of partial neuronal reprogramming
print('No PubMed results for hypothesis h-baba5269')
No PubMed results for hypothesis h-baba5269
Hypothesis 9: Temporal TET2-Mediated Hydroxymethylation Cycling¶
Target genes: TET2 · Composite score: 0.657
Mechanistic Overview¶
Temporal TET2-Mediated Hydroxymethylation Cycling starts from the claim that modulating TET2 within the disease context of neurodegeneration can redirect a disease-relevant process. The original description reads: "## Molecular Mechanism and Rationale The temporal TET2-mediat
print('No PubMed results for hypothesis h-a90e2e89')
No PubMed results for hypothesis h-a90e2e89
8. Knowledge graph edges (121 total)¶
edge_data = [{'source': 'SIRT1', 'relation': 'associated_with', 'target': 'SIRT3', 'strength': 0.8}, {'source': 'OCT4', 'relation': 'activates', 'target': 'cellular_reprogramming', 'strength': 0.8}, {'source': 'SIRT1', 'relation': 'regulates', 'target': 'chromatin_remodeling', 'strength': 0.8}, {'source': 'SIRT1', 'relation': 'targets', 'target': 'neurodegeneration', 'strength': 0.78}, {'source': 'diseases-huntingtons', 'relation': 'investigated_in', 'target': 'h-4bb7fd8c', 'strength': 0.75}, {'source': 'TET2', 'relation': 'regulates', 'target': 'DNA_methylation', 'strength': 0.75}, {'source': 'HDAC3', 'relation': 'therapeutic_target', 'target': 'neurodegeneration', 'strength': 0.73}, {'source': 'SIRT3', 'relation': 'regulates', 'target': 'mitochondria', 'strength': 0.7}, {'source': 'BRD4', 'relation': 'regulates', 'target': 'chromatin_remodeling', 'strength': 0.7}, {'source': 'BRD4', 'relation': 'therapeutic_target', 'target': 'neurodegeneration', 'strength': 0.66}, {'source': 'SIRT1', 'relation': 'associated_with', 'target': 'neurodegeneration', 'strength': 0.65}, {'source': 'SIRT3', 'relation': 'therapeutic_target', 'target': 'neurodegeneration', 'strength': 0.64}, {'source': 'SIRT1', 'relation': 'participates_in', 'target': 'Sirtuin-1 / NAD+ metabolism / ', 'strength': 0.62}, {'source': 'BRD4', 'relation': 'associated_with', 'target': 'neurodegeneration', 'strength': 0.56}, {'source': 'TET2', 'relation': 'therapeutic_target', 'target': 'neurodegeneration', 'strength': 0.56}, {'source': 'OCT4', 'relation': 'therapeutic_target', 'target': 'neurodegeneration', 'strength': 0.55}, {'source': 'BRD4', 'relation': 'participates_in', 'target': 'Epigenetic regulation', 'strength': 0.52}, {'source': 'HDAC', 'relation': 'participates_in', 'target': 'Astrocyte reactivity signaling', 'strength': 0.46}, {'source': 'SIRT3', 'relation': 'participates_in', 'target': 'Sirtuin-3 / mitochondrial deac', 'strength': 0.45}, {'source': 'SIRT3', 'relation': 'associated_with', 'target': 'neurodegeneration', 'strength': 0.45}, {'source': 'DLG4', 'relation': 'co_discussed', 'target': 'PARP1', 'strength': 0.4}, {'source': 'BDNF', 'relation': 'co_discussed', 'target': 'SYN1', 'strength': 0.4}, {'source': 'APOE4', 'relation': 'co_discussed', 'target': 'SIRT3', 'strength': 0.4}, {'source': 'SIRT3', 'relation': 'co_discussed', 'target': 'TAU', 'strength': 0.4}, {'source': 'PARP1', 'relation': 'co_discussed', 'target': 'SIRT3', '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
The cached evidence bundle is the minimum viable real-data analysis for this topic.