GABAergic Hub Stabilization Through α5-Subunit Inverse Agonists

GABAergic Hub Stabilization connectomics market 45% proposed
Composite
43%
Novelty
60%
Feasibility
45%
Impact
50%
Mechanistic
55%
Druggability
55%
Safety
30%
Confidence
45%

Mechanistic description

GABAergic Hub Stabilization Through α5-Subunit Inverse Agonists

Evidence for (5)

  • Inhibitory deficits precede and drive network hyperactivity in AD models

    PMID:20167333

  • Activity-dependent degeneration explains hub vulnerability - highly active neurons accumulate more pathology

    PMID:22817841

  • GABA-A α5 is enriched in hippocampus and cortex, regions rich in hub neurons

    PMID:25834165

  • α5 inverse agonists reduce excitotoxicity without cognitive impairment in preclinical models

    PMID:26226646

  • Hub neurons show elevated oxidative stress and metabolic activity

    PMID:20644199

Evidence against (5)

  • RG1662 (α5 inverse agonist) failed in Down syndrome clinical trials - no cognitive benefit

    PMID:NCT02098369

  • Inverted U-shaped relationship: both excessive activity AND suppression alter amyloid dynamics

    PMID:25239499

  • Hyperexcitability in AD may be compensatory rather than pathogenic

    PMID:25239499

  • Field abandoned α5 inverse agonists - Roche discontinued RG1662

    PMID:26226646

  • Cognitive stimulation (increasing hub activity) is protective against AD

    PMID:25239499