The challenge of traditional neuropharmacology

Today’s neuroactive medicines often lack precision, as they primarily target receptors distributed ubiquitously throughout the nervous system. By contrast, the diseases these drugs treat typically originate in specific cell types or restricted brain regions. The broad activity of existing medicines leads to reduced efficacy, harmful side effects, suboptimal dosing, medication noncompliance, and drug discontinuation.

By leveraging a unique class of proteins, we can precisely target cell types and neurocircuits where our medicines are needed: on the source of the neurophysiological abnormality. With this approach, we substantially enhance efficacy and limit side effects.

Receptor

Challenges

  • Broad activity
  • Suboptimal efficacy
  • Life-limiting side effects

Our solution: Precision through receptor-associated proteins

Receptors don’t act alone. Instead, communities of associated proteins modulate receptor expression and function. These receptor-associated proteins, (RAPs), can be harnessed to precisely steer neuromedicines to disease-driving neuronal tissues.

Whereas the neurotransmitter receptors themselves are widespead, RAPs often function in discrete and specific cell types or brain regions. By embedding region-specific RAPs into our drug discovery and development processes, we create novel drugs that act only on disease-relevant areas where those RAPs are present, freeing patients of their symptoms and the side effects of their treatment regimen.

Receptor-Associated Proteins

Advantages

  • Region-selective activity
  • Optimal efficacy
  • Opportunity for fuller life
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Enabling drug discovery and development

Over the past decade, our discovery platform has been built, refined, and tested to identify drugs with remarkable selectivity that enhance patient benefit. Our first program, designed to treat drug-resistant seizure disorders, is in clinical development.

Rapport’s platform integrates cutting-edge genetics with functional proteomics to discover RAPs that are regionally localized and involved in disease-related signaling. We then leverage these RAPs to develop precision medicines that modulate neurotransmitter receptors with greater efficacy and reduced side effects.

Challenges

  • Broad activity
  • Suboptimal efficacy
  • Life-limiting side effects
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Advantages

  • Region-selective activity
  • Optimal efficacy
  • Opportunity for fuller life
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Scientific Publications

Nicotinic acetylcholine receptor redux: Discovery of accessories opens therapeutic vistas

Matta et al. Science (2021) 373: 6539

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Targeting receptor complexes: a new dimension in drug discovery

Rosenbaum et al. Nature Reviews Drug Discovery (2020) 19: 884

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Proteins for increased surface expression of the α6β4 nicotinic acetylcholine receptor: Nothing but good news?

Grant and Lester. The Journal of Clinical Investigation (2020) 130: 5685

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Functional α6β4 acetylcholine receptor expression enables pharmacological testing of nicotinic agonists with analgesic properties

Knowland et al. The Journal of Clinical Investigation (2020) 130:6158

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Hair cell α9α10 nicotinic acetylcholine receptor functional expression regulated by ligand binding and deafness gene products.

Gu et al. PNAS (2020) 117: 24534

Read Hair cell α9α10 nicotinic acetylcholine receptor functional expression regulated by ligand binding and deafness gene products. Now
Enhancement of the Medial Olivocochlear System Prevents Hidden Hearing Loss

Boero et al. The Journal of Neuroscience (2018) 38: 7440

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Getting a Handle on Neuropharmacology by Targeting Receptor-Associated Proteins

Maher et al. Neuron (2017) 96: 989

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The mammalian efferent vestibular system plays a crucial role in vestibulo-ocular reflex compensation after unilateral labyrinthectomy

Hübner et al. Journal of Neurophysiology (2017) 117: 1553

Read The mammalian efferent vestibular system plays a crucial role in vestibulo-ocular reflex compensation after unilateral labyrinthectomy Now
Discovery and Characterization of AMPA Receptor Modulators Selective for TARP-γ8

Maher et al. The Journal of Pharmacology and Experimental Therapeutics (2016) 357: 394

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The nicotinic a6 subunit gene determines variability in chronic pain sensitivity via cross-inhibition of P2X2/3 receptors

Wieskopf et al. Science Translational Medicine (2015) 7:287

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A randomized, double-blind, placebo-controlled trial evaluating the efficacy and safety of ABT-594 in patients with diabetic peripheral neuropathic pain

Rowbotham et al. Pain (2009) 146: 245

Read A randomized, double-blind, placebo-controlled trial evaluating the efficacy and safety of ABT-594 in patients with diabetic peripheral neuropathic pain Now