Funded Projects

There is an urgent need to find new ways to treat chronic pain through better targeting of underlying biological processes. Research shows that flexible synapses within the amygdala brain region play a role in the progression of pain from acute to chronic, but the details are not fully understood. The receptor glutamate delta 1 helps to form and maintain synapses in the amygdala in inflammatory and neuropathic pain. This project will study how the shape and characteristics of glutamate delta 1 affect pain conditions that involve the amygdala, toward informing future development of pain medications. 

Pain caused by the degeneration of discs between vertebrae in the spine makes up a significant proportion of all chronic low back pain conditions. Although opioids are prescribed as treatments for this chronic condition, they often do not provide effective pain management, and currently there are no treatments that target the underlying disc disease. Notochordal cells mature into the cells that make up discs between vertebrae. Preliminary studies have shown that notochordal cells can be made from induced pluripotent stem cells, offering a potential replacement for diseased cells between discs. This study aims to develop a novel treatment for painful disc degeneration using a microgel/microtissue embedded with human notochordal cells made in the lab from induced pluripotent stem cells.

Up to 5 percent of adolescents suffer from high-impact chronic musculoskeletal (MSK) pain, and only about 50 percent with chronic MSK pain who present for treatment recover. Current treatments for chronic MSK pain are suboptimal and have been tied to the opioid crisis. Discovery of robust markers of the recovery versus persistence of pain and disability is essential to develop more resourceful and patient-specific treatment strategies, requiring measurements across multiple dimensions in the same patient cohort in combination with a suitable computational analysis pipeline. Preliminary data has implicated novel candidates for neuroimaging, immune, quantitative sensory, and psychological markers for discovery. In addition, a standardized specimen collection, processing, storage, and distribution system is in place, along with expertise in machine learning approaches to extract reliable and prognostic bio-signatures from a large and complex data set. This project will facilitate risk stratification and a resourceful selection of patients who are likely to respond to current multidisciplinary pain treatment approaches.

Social safety net programs and Medicaid that provide basic necessities such as shelter, health care, and food to people with low incomes are particularly important for women parents who use drugs. This project will examine the separate and combined impact of state social safety net program eligibility and administration on opioid-related behavioral outcomes for women parents experiencing poverty. Findings from this research will provide actionable recommendations for changes to these programs that may promote health and well-being for these women.

American Native (AN) communities experience high rates of trauma that compromise the mental health of parents and caregivers that in turn increases their children?s risk for suicide and substance use during adolescence and young adulthood. Without intervention, this intergenerational cycle may repeat. The goal of this study is to understand opioid use, suicide, and the social network characteristics of Fort Peck Assiniboine and Sioux parents and caregivers to determine how the social network of parents/adult caregivers are related to both risk for and protection from suicide and opioid use. This supplement will examine the effectiveness of a community health worker delivered, culturally tailored prevention intervention called Wa?Kan Ye?Zah on caregiver and child behavioral and mental health outcomes and assess the benefits of culturally enhancing the intervention for caregivers? well-being.

The widespread misuse of opioids has underscored the need to develop nonaddicting pain medications. Chronic pain is a major factor contributing to insomnia, and sleep disruption due to chronic pain causes patients to seek relief, exacerbating the drive for prescription opioids. In opioid use disorder, withdrawal from opiates induces insomnia, posing an additional challenge for successful abstinence. This study aims to determine whether treatment of opioid withdrawal-induced insomnia with nociceptin/orphanin FQ receptor (NOPR) agonists will mitigate the drive for opiate use. A major component of the arousal/withdrawal circuitries resides in the locus coeruleus (LC), which expresses MOPRs. The study will determine whether and how the NOPR system engages LC circuits to reduce arousal and insomnia-related phenotypes and assess the hypotheses that 1) the NOPR system is a component of the endogenous sleep/wake regulatory system and 2) NOPR agonists can act as therapeutic interventions to reduce opiate use.

Opioids are widely used pain treatments, despite their relative ineffectiveness for chronic pain and their high potential for misuse and addiction. There is thus an urgent need for alternative, non-addictive pain treatments. Genetic and functional studies of human pain disorders and animal models of pain have validated Nav1.7, a voltage-gated sodium channel as an attractive target for new pain treatments. Currently available blockers of these channels can sometimes provide symptomatic relief for patients but have worrisome side effects affecting the brain and heart. This study aims to develop and validate an innovative site-directed RNA editing strategy that will offer the ability to create new versions of molecules to block Nav1.7, toward establishing a novel, non-addictive approach to treat chronic pain.

Wound care procedures (WCPs), such as dressing changes, cause moderate to severe pain in 74% of patients, nearly half of whom experience severe pain. Mainstay recommendations to prevent pain during WCPs have focused on either administration of preventive and procedural analgesia or use of expensive, non-adherent dressings. However, it is unclear which patients to target for analgesia or expensive dressings, leading to their inappropriate over- or underuse. To achieve the aims of the study, a comprehensive set of wound, patient, and biological factors will be measured concurrently with pain during a dressing change among a sample of 450 inpatients with open wounds. A predictive model will be developed and biological mechanisms will be examined using logistic regression. The proposed study has the potential to make significant contributions because clinicians will be able to target those patients requiring preventive pain control, thereby eliminating the spiraling impact of painful procedures on nociceptor sensitization.

Neuropathic pain is a chronic and difficult to treat condition that affects people in different ways. This project aims to personalize treatments based on individual pain profiles. The research will develop an inexpensive test using a technique called quantitative sensory testing to predict how a patient will respond to two common pain medications. The research will also look for other factors in blood that enhance the accuracy of these predictions.

The development of non-addictive pain therapeutics can help counter opioid addiction and benefit patients, including those who suffer from neuropathic pain, in particular diabetic neuropathic pain (DNP). This project’s goal is to develop a safe, efficacious, and non-addictive small-molecule drug that activates Kv7 voltage-gated potassium channels to address overactive neuronal activity in DNP. Researchers will discover Kv7 activators that favor Kv7 isoforms altered in DNP and found in dorsal root ganglia, decrease off-target side effects observed with the use of earlier non-biased Kv7 activators, and optimize the absorption, distribution, metabolism, excretion, and toxicity profiles of these activators. This screening paradigm is intended to establish a clinic-ready, well-tolerated, and widely effective product to treat neuropathic pain.

Temporomandibular joint (TMJ) disorders, which affect the joint connecting the lower jaw and the skull, are common and difficult chronic pain conditions. Pain management strategies that harness the body’s own pain relief mechanisms (including placebo effects in which pain relief cannot be attributed to a specific treatment), can reduce the severity and duration of TMJ-related chronic pain. Although research suggests that placebo effects may have a genetic basis, few, if any, genetic studies have examined this possibility in individuals with TMJ disorders. This project will use in-depth genetic, sociodemographic, clinical, and psychological data collected from adults with chronic TMJ disorders to better understand how the placebo effect works.

Opioid use disorders (OUDs) in pregnancy are a U.S. public health crisis; the current standard of care is treatment with an opioid agonist such as buprenorphine (BPH), which has an associated risk for neonatal abstinence syndrome (NAS) and possible long-term neurodevelopmental consequences. As a novel treatment option for OUD in pregnancy, naltrexone would not expose the developing fetus to opioids, greatly reducing the risk for NAS and potentially improving maternal and infant outcomes. This study will evaluate the safety, efficacy, pharmacokinetics, and pharmacogenomics of naltrexone for pregnant women with OUDs, evaluating comprehensive mother-infant outcomes throughout the pregnancy and first year after birth. It will enroll 50 pregnant women stabilized pre-pregnancy on extended-release naltrexone (XR-NTX) and 50 comparison women on BPH from Boston Medical Center and the University of North Carolina in this multi-center prospective comparative cohort study.

People who use opioids in rural areas suffer worse health and less insurance coverage. The opioid problem in rural areas is of particular concern, as rural areas have higher overdose rates despite equivalent rates of OUD. This is because rural areas have a scant number of clinics and clinicians who provide medication treatment for OUD. Thus, people living in rural areas must travel long distances to access clinics that may or may not have expertise in providing treatment to patients with OUD. Telemedicine (TM) could efficiently increase capacity for delivery of buprenorphine in rural areas and may increase the number of patients receiving medication treatment and improve treatment retention and outcomes. While the development of medication treatments for opioid use disorder (MOUD) capacity in primary care settings with optimal/comprehensive services is desirable, the current opioid crisis with escalating overdose death rates in rural areas suggests a need to implement an efficient, cost-effective system of MOUD services that can be scaled up quickly. The use of a centralized and Medicare-covered TM vendor utilizing a developed methodology and established organizational infrastructure offers the great potential for a rapid rollout to increase access to MOUD and improve treatment retention in rural areas. This cluster randomized clinical trial with two phases will test expanded treatment access to improve retention on MOUD in highly affected rural areas. Phase I will include implementing telemedicine in a limited number of rural sites with varying levels of office-based opioid treatment (OBOT) to inform implementation strategies for the main trial, and Phase II will include evaluate comparative effectiveness between OBOT alone and OBOT + TM at 30 sites.