HDAC6 Inhibitor Therapy for Pan-Neurodegenerative Protein Homeostasis

Mechanistic description

Mechanism / pathway

HDAC6
→
neurodegeneration

Evidence for (5)

Decreased H3K9ac at autophagy gene promoters in AD prefrontal cortex correlates with reduced BECN1 expression

PMID:25422509
HDAC6 overexpression promotes tau aggregation in cellular models

PMID:23903654
Pan-HDAC inhibition shows neuroprotection in ALS models through autophagy enhancement

PMID:28161408
DNA methylation age acceleration correlates with reduced autophagy pathway activity across neurodegenerative diseases

PMID:29570819
HDAC6-selective compounds (ACY-1215) have acceptable safety profiles in oncology trials

PMID:28161408

Evidence against (5)

Evidence-base conflates pan-HDAC and selective HDAC6 inhibition - PMID:28161408 uses pan-HDAC, not HDAC6-selective

PMID:28161408
HDAC6 knockout mice demonstrate unexpected phenotypes including enhanced fear conditioning and altered synaptic plasticity

PMID:25307849
BBB penetration problematic - hydroxamate moiety creates P-gp/BCRP substrate liability; brain concentrations <5% of plasma

PMID:25307849
Autophagy modulation is context-dependent - may be detrimental in advanced neurodegeneration where autophagic flux is maximally engaged

PMID:25307849
HDAC6 elevation could represent a protective compensatory response to protein aggregation stress

PMID:25307849

Evidence matrix

5 supporting 5 contradicting

47% posterior support

Supporting

Decreased H3K9ac at autophagy gene promoters in AD prefrontal cortex correlates with reduced BECN1 expression PMID:25422509
HDAC6 overexpression promotes tau aggregation in cellular models PMID:23903654
Pan-HDAC inhibition shows neuroprotection in ALS models through autophagy enhancement PMID:28161408
DNA methylation age acceleration correlates with reduced autophagy pathway activity across neurodegenerative diseases PMID:29570819
HDAC6-selective compounds (ACY-1215) have acceptable safety profiles in oncology trials PMID:28161408

Contradicting

Evidence-base conflates pan-HDAC and selective HDAC6 inhibition - PMID:28161408 uses pan-HDAC, not HDAC6-selective PMID:28161408
HDAC6 knockout mice demonstrate unexpected phenotypes including enhanced fear conditioning and altered synaptic plasticity PMID:25307849
BBB penetration problematic - hydroxamate moiety creates P-gp/BCRP substrate liability; brain concentrations <5% of plasma PMID:25307849
Autophagy modulation is context-dependent - may be detrimental in advanced neurodegeneration where autophagic flux is maximally engaged PMID:25307849
HDAC6 elevation could represent a protective compensatory response to protein aggregation stress PMID:25307849

Bayesian persona consensus

47% posterior support

1 signal · 0 for / 1 against · agreement 0%

scidex.consensus.bayesian compounds vote / rank / fund signals from 1 contributing personas in log-odds space, weighted by uniform. Prior 50%.

Cite this hypothesis

Citation

etl-backfill (2026). HDAC6 Inhibitor Therapy for Pan-Neurodegenerative Protein Homeostasis. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-255db681

BibTeX

@misc{scidex_hypothesis_h255db68,
  title        = {HDAC6 Inhibitor Therapy for Pan-Neurodegenerative Protein Homeostasis},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-255db681},
  note         = {SciDEX artifact hypothesis:h-255db681}
}