Funded Projects

This project will develop PIDA, which will allow researchers to measure the activity of pain-sensitive human neurons in response to pain stimuli and potential pain treatments. The tool will use automated digital microscopes in the absence or presence of a potential pain medication. Since this tool contains human neurons, it may be more effective at predicting the efficacy of potential pain drugs in human patients than the animal models that are currently used.

The ability to de-risk lead compounds during pre-clinical development with advanced “organoid-on-a-chip” technologies shows promise. Development of microphysiological models of the peripheral nervous system is lagging. The technology described herein allows for 3D growth of high-density axonal fiber tracts, resembling peripheral nerve anatomy. The use of structural and functional analyses should mean drug-induced neural toxicity will manifest in these measurements in ways that mimic clinical neuropathology. The goals of this proposal are to establish our human model using relevant physiological measurements in tissues fabricated from human iPS cells and to validate the model system with a library of compounds, comparing against conventional cell culture models. Validating the peripheral nerve model system with drugs known to induce toxicity via a range of mechanisms will demonstrate the ability of the system to predict various classifications of neuropathy, yielding a high-content assay far more informative than traditional in vitro systems.

Some chemotherapy treatments damage nerves outside the brain and spinal cord. This condition, chemotherapy-induced peripheral neuropathy, involves tingling, burning, weakness, or numbness in hands and/or feet and affects nearly 70% of cancer patients receiving chemotherapy. Common pain medications, including opioids, can relieve pain for short intervals but are not suitable for long-term therapy. This project will conduct studies to investigate the safety and tolerability of a novel strategy to treat neuropathic pain: modifying the activity of the dorsal root ganglia, which are nerve cells in the spinal cord that communicate pain signals to and from the brain.

Some chemotherapy treatments damage nerves outside the brain and spinal cord. This condition, chemotherapy-induced peripheral neuropathy, involves tingling, burning, weakness, or numbness in hands and/or feet and affects nearly 70% of cancer patients receiving chemotherapy. Common pain medications, including opioids, can relieve pain for short intervals but are not suitable for long-term therapy. This project will develop and test a new type of treatment (reduced size cyclic analogs) for this condition. The research will evaluate the ability of this therapy to reduce inflammation and pain, as well as to repair nerve damage.

Thoracic (chest) surgeries often cause both short-term (acute) and long-term (chronic) pain and long-term opioid use. Unique genetic and clinical risk factors affect individual responses to surgical pain and pain medications. Current trial-and-error approaches to managing post-surgical pain and opioid prescribing are not ideal. This project will develop predictive software within a medical device that takes into account an individual’s genetic and clinical information to predict the likelihood of chronic pain following thoracic surgery. 

 Non-Invasive Brain Stimulation (NIBS) has been successfully applied for the treatment of chronic pain (CP) in some disease states, where treatment induced changes in brain activity revert maladaptive plasticity associated with the perception/sensation of CP [25-28]. However, the most common NIBS methods, e.g., transcranial direct current stimulation, have shown limited, if any, efficacy in treating neuropathic pain. It has been postulated that limitations in conventional NIBS techniques’ focality, penetration, and targeting control limit their therapeutic efficacy . Electrosonic Stimulation (ESStim™) is an improved NIBS modality that overcomes the limitations of other technologies by combining independently controlled electromagnetic and ultrasonic fields to focus and boost stimulation currents via tuned electromechanical coupling in neural tissue . This proposal is focused on evaluating whether our noninvasive ESStim system can effectively treat CP in carpal tunnel syndrome (CTS), both as a lone treatment and in conjunction with physical therapy (PT). Investigators hypothesize ESStim can be provided synergistically with PT, as both can encourage plasticity-dependent changes which could maximally improve a CTS patient’s pain free mobility. In parallel with the CTS treatments, the team will build multivariate linear and generalized linear regression models to predict the CTS patient outcomes related to pain, physical function, and psychosocial assessments as a function of baseline disease characteristics. The computational work will be used to develop an optimized CTS ESStim dosing model. 

 Quell Therapeutics uses the Optopatch platform for making all-optical electrophysiology measurements in neurons at a throughput sufficient for phenotypic screening. Using engineered optogenetic proteins, blue and red light can be used to stimulate and record neuronal activity, respectively. Custom microscopes enable electrophysiology recordings from 100’s of individual neurons in parallel with high sensitivity and temporal resolution, a capability currently not available with any other platform screening technology. Here, researchers combine the Optopatch platform with an in vitro model of chronic pain, where dorsal root ganglion (DRG) sensory neurons are bathed in a mixture of inflammatory mediators found in the joints of osteoarthritis patients. The neurons treated with the inflammatory mixture become hyperexcitable, mimicking the anticipated cellular pain response. Investigators calculate the functional phenotype of arthritis pain, which captures the difference in action potential shape and firing rate in response to diverse stimuli. The team will screen for small molecule compounds that reverse the pain phenotype while minimizing perturbation of neuronal behavior orthogonal to the pain phenotype, the in vitro “side effects.” The highest ranking compounds will be chemically optimized and their pharmacokinetic, drug metabolism, and in vivo efficacy will be characterized. The goal is to advance therapeutic discovery for pain, which may ultimately help relieve the US opioid crisis.

Non-steroidal anti-inflammatory drugs (NSAIDs) are a first line pharmacologic pain therapy for chronic musculoskeletal pain, and rheumatoid arthritis (RA) and moderate to severe osteoarthritis (OA) specifically. However, insufficient pain relief by NSAID monotherapy has encouraged the use of combination therapy. Combinations of NSAIDs plus weak opioids are widely used although objective evidence for efficacy is limited and they have many adverse events.  A growing body of evidence suggests that ?2/?3 subtype-selective positive allosteric modulators (PAM) of the ?- aminobutyric acid A receptor (GABAAR) may effectively restore central pain regulatory mechanisms thus providing effective relief of chronic pain with reduced prevalence and severity of side-effects.  Based on these promising preliminary studies and considerable supporting literature data, the research team will test the hypothesis that combination dosing of TPA-023B with an NSAID will work synergistically to suppress the acute and chronic pain components of chronic musculoskeletal pain. 

Chronic pelvic pain affects social and sexual quality of life in up to 20% of women in the United States. It is often managed with physical therapy approaches, but when these measures fail, injection therapies may be indicated. These include injection of botulinum neurotoxin, which leads to muscle relaxation in the pelvic floor and thus pain relief. However, botulinum neurotoxin has dose-dependent side effects and is expensive. Therefore, a precision injection technique to administer botulinum neurotoxin so that it remains effective while minimizing adverse effects and costs is needed. Hillmed Inc. has developed a technique to assess the pelvic floor and choose the optimal injection site, which has improved treatment outcome in initial analyses. They are now aiming to develop a commercializable, personalized precision injection medical device for botulinum toxin and software package that will enable clinicians to optimize botulinum neurotoxin injection. They will then assess the system’s efficacy in a clinical trial of women with chronic pelvic pain and healthy women.

Pelvic venous compression is a common cause of chronic pelvic pain in women. Because many women do not receive an accurate diagnosis for the cause of their pelvic pain, some take opioids to help manage their symptoms. This project will further develop a new diagnostic system specifically designed to treat limited blood flow in pelvic region. This system visualizes pelvic veins toward development of a method to relieve pressure that causes pain. 

For many individuals in recovery from a substance use disorder, certain cues—including stress and drug-related cues—can trigger a physiological state in which they are more likely to relapse. In this SBIR project, the investigators intend to deploy a system—consisting of a wearable sensor, a smartphone app, and a clinical portal—to provide individuals in recovery and their treatment providers with an opportunity to identify moments of high risk for relapse and to access real-time intervention opportunities. The sensors will identify signals of stress or drug use, interface with a smartphone app, and provide options for annotations, stress-reduction techniques, or contact with an individual’s support system and treatment providers, as well as log and encourage healthy behaviors. This study will deploy and optimize the system, as well as test its effects on addiction-related outcomes, such as rate of relapse.

Chemokines (hormones of the immune system that mediate innate immune inflammation) enhance pain, reduce opioid analgesia, and promote drug-seeking behavior and addiction, giving them a central role at the crossroads of chronic pain and the opioid crisis. Blocking chemokines (rather than opioid receptors) provides an exciting treatment opportunity for both pain and opioid use disorder. This research continues previous work studying the efficacy of RAP-103, a small, orally stable chemokine receptor blocker. The previous research has shown that RAP-103 is safety and effective in preclinical models that mimic human drug-taking. This research will now optimize the dose required to achieve decreased motivation to maintain opioid use, establish manufacturing scale-up feasibility, provide RAP-103 for safety testing in animals, and conduct stability testing of RAP-103 toward the goal of submitting an Investigational New Drug application to the FDA.

This project seeks to develop a first-in-class (FIC), peripherally restricted and long-acting drug with potential to reduce or replace opioid for moderate to severe pain, and that will be non-addictive, safe, and convenient to use. The program is based on strong scientific evidence showing that activation of a receptor called MAS1 produces opioid-independent and peripheral pain relieving activity in a wide range of animal models of chronic pain, including inflammatory, neuropathic, and bone cancer pain. This project focuses on the development of potent, stable, and specific molecules that stimulate MAS1. Researchers will then attach peptides that stimulate MAS to antibody carriers that make them last longer and selectively affect only the peripheral nervous system, which could allow for once a week or twice a month dosing while maintaining the drug’s efficacy and reducing potential side effects, and test the resulting molecule in animal models.