Funded Projects

The nation’s opioid epidemic remains a public health emergency, marked by high rates of opioid use and misuse among adults and a correlated rising incidence of neonatal opioid withdrawal syndrome (NOWS) in infants exposed to opioids before they are born. There are currently no pharmacotherapies approved by the Food and Drug Administration (FDA) for the treatment of NOWS. This research will complete manufacturing and clinical trial activities to evaluate and support FDA approval of a pediatric-appropriate formulation of lofexidine, a non-opioid medication approved for mitigation of opioid withdrawal symptoms in adults, as a first line-therapy in NOWS patients through two clinical trials to (1) identify an optimal dosing regimen of lofexidine for treatment of NOWS, and (2) evaluate the risks and benefits of its use in improving withdrawal symptoms, limiting infant exposure to other off-label narcotic medications and shortening the infant’s overall stay in the hospital.

While effective treatments exist for substance use disorders, adhering to treatment and retaining patients in treatment can be a challenge. The objectives of this project are to facilitate the implementation of loyalty/reward-based programs to increase adherence to medical treatment among patients with substance use disorders through innovative solutions to common challenges. Building on experience developing software to promote patient appointment attendance, the project will build a new tool to test on a sample of 10 providers and 10 patients who are prescribed but not fully adherent to substance use disorder treatment. Patients will receive tailored text messages (in English or Spanish) encouraging adherence, self-report their treatment adherence (which will be verified through smart pill caps and biological testing), earn points for adherence that can be exchanged for rewards customized for them based on a baseline survey, and report their satisfaction with the program and process at the end of the 4-week study. This pilot will assess the feasibility and perceived usefulness of the product in support of eventual larger-scale testing in a clinical trial.

This project will design and test optimized temporal patterns of stimulation to improve the efficacy of commercially available spinal cord stimulation (SCS) systems to treat chronic neuropathic pain. Researchers will build upon a validated biophysical model of the effects of SCS on sensory signal processing in neurons within the dorsal horn of the spinal cord to better understand how to improve the electrical stimulus patterns applied to the spinal cord. They will use sensitivity analyses to determine the robustness of stimulation patterns to variations in electrode positioning, selectivity of stimulation, and biophysical properties of the dorsal horn neural network. Researchers will demonstrate improvements from these new stimulus patterns by 1) measuring their effects on pain-related behavioral outcomes in a rat model of chronic neuropathic pain and by 2) quantifying the effects of optimized temporal patterns on spinal cord neuron activity. The outcome will be mechanistically derived and validated stimulus patterns that are significantly more efficacious than the phenomenologically derived standard of care patterns; these patterns could be implemented with either a software update or minor hardware modifications to existing SCS products.

High relapse rates among people with opioid use disorder (OUD) indicate that addiction involves appetitive pathways. Peripheral stimulation of the glucagon-like peptide-1 receptor (GLP-1R) “satiety” pathway could reduce heroin seeking and taking. Pretreatment with a GLP-1R agonist reduces heroin taking, seeking, and drug-induced reinstatement in rats. This project tests whether GLP-1R agonists can reduce relapse in humans with OUD. A pilot study will be conducted to determine whether once-daily treatment with the shorter acting GLP-1R agonist, liraglutide, can safely and effectively reduce cravings among OUD patients. Animal models will be used to test the efficacy and safety of a longer-acting GLP-1R agonist, semaglutide, and then a clinical trial will be conducted to test whether semaglutide will reduce relapse and use in animal models. If successful, the study will show that treatment with GLP-1R agonists can safely and effectively reduce opioid craving, seeking, and relapse.

FDA-approved medications for treating opioid use disorder are effective, but there is a significant unmet need for alternatives, especially relapse prevention. NIDA and the FDA have encouraged investigators to expand the range of therapeutic outcomes, beyond measurement of abstinence. Insomnia is a clinically significant, but understudied, correlate/predictor of relapse to substance use. Yet most medications for treating insomnia have limited efficacy and can produce side effects. The orexin (OX) system plays a key role in sleep and substance use, offering a promising avenue for study. This project will address whether OX-1/2 antagonism is a mechanism that can directly improve outpatient opioid abstinence, or whether OX antagonism corrects sleep deficiencies and indirectly improves opioid abstinence. Specific aims are to determine whether nightly treatment with the OX-1/2 antagonist suvorexant, relative to placebo, 1) increases outpatient opioid abstinence and 2) improves sleep efficiency on the residential detoxification unit. The study will also determine 3) whether improved sleep efficiency predicts greater opioid abstinence (regardless of group assignment).

Expanding access to naloxone in the community through the pharmacy can be a critical mechanism for extending this lifesaving medication’s reach. This study will partner with two large retail pharmacy chains and integrate two interventions that provide knowledge and training for pharmacists to identify and effectively engage with patients who may be at high risk for an opioid overdose. The interventions will be combined into a cohesive educational program, implemented in 160 community pharmacies and tested for effectiveness. Study findings will create a generalizable, evidence-based training and toolkit for pharmacists caring for patients who use prescribed or illicit opioids, in more than 40 states adopting or expanding pharmacy naloxone.

The Coordinating Center (CC) will provide centralized logistical support and facilitate communication and coordination of activities across the cooperative. The CC will provide scientific leadership, which will include providing scientific expertise in the areas of implementation research and economic evaluation. The CC will establish an infrastructure for cross-site data collection, management, harmonization, and data sharing and provide expert methodological and statistical consultation.

Effective treatments are elusive for the majority of patients with neuropathic pain. Reactive oxygen and nitrogen species (ROS/RNS) are involved in neuropathic pain, because they drive mitochondrial dysfunction, cytokine production, and neuronal hyperexcitability; therefore, stimulation of endogenous antioxidants is predicted to simultaneously resolve multiple neuropathic pain mechanisms. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that is a potential therapeutic target because it regulates the expression of a large number of endogenous antioxidant-related genes and can be activated with a single drug. This project will test the hypothesis that Nrf2 activation increases multiple endogenous antioxidants, therefore reversing neuropathic pain behaviors and counteracting neuropathic pain mechanisms that are driven by ROS/RNS and could provide an effective pain therapy, with minimal abuse/addictive potential.

Clinician bias causes inequities in healthcare, and interventions are needed to mitigate and eradicate this bias. This project aims to develop and test the impact of two interventions on overcoming clinician implicit bias in the management of pain for children from ethnic minorities treated in the emergency department. The study will include pediatric patients from under-represented minority groups with pain from long-bone fractures or acute appendicitis who are cared for by racially and ethnically diverse caregivers. Researchers will use stakeholder-informed approaches to establish quality of care metrics and then use clinician audit and feedback as well as data from electronic health records to quantify evidence of bias.      

A large number of probationers/parolees with opioid use disorder have limited access to effective treatment. This study is the first random clinical trial in the United States that will assess the effectiveness of buprenorphine treatment using MedicaSafe, a system composed of secure pre-packaged buprenorphine/naloxone cartridges, designed to be dispensed by a SmartKey device that enables clinicians to track patient adherence. The study will initiate treatment at a community corrections office compared to referral to a community program. The public health impact of the proposed study would be widespread, as this model of care could be implemented throughout many areas of the United States with high rates of opioid use disorder in their probation/parolee populations that lack access to methadone treatment.

There is a critical need to expand research infrastructure to develop, test, and implement new clinical interventions and evidence-based opioid use disorder (OUD) treatment into diverse clinical settings. The University of Utah’s Greater Intermountain Node (GIN) will expand the existing NIDA Clinical Trial Network’s (CTN) infrastructure by developing and testing innovative OUD interventions, expanding the settings for CTN research, and bringing new research acumen to the CTN. GIN brings expertise in three spheres of OUD research: (1) non-addiction health care settings, (2) large health systems of care, and (3) implementation science. GIN’s specific aims include (1) enhance CTN’s ability to conduct research in primary care and non-addiction care settings; (2) enhance CTN’s ability to conduct research within integrated systems of care with “big data” resources; and (3) enhance CTN’s implementation of science research to integrate and disseminate evidence-based addiction care into diverse non-addiction and health system targets.

With nearly 116 million people suffering from chronic pain in the United States, there is a need for new analgesics without the risks posed by opioids. Antagonists acting at TRPV1 receptor have long been recognized as one of the most promising novel classes of non-opioid analgesics. Initial tests in humans have confirmed that this class of drugs produces analgesia and is safe and well-tolerated, but side effects include hyperthermia and partial loss of heat sensitivity, leading to most research being halted. This project will conduct a set of preclinical proof-of-concept studies in rats to support the claims that, at doses that have minimal, clinically acceptable, or negligible impact on cardiovascular function, a2 adrenoceptor agonists can diminish thermoregulatory effects of TRPV1 receptor antagonists.

Neuropathic pain—a debilitating form of chronic pain affecting millions of people—responds poorly to current analgesic treatment approaches. By better understanding the cellular mechanisms and compounds involved in neuropathic pain, researchers will be able to develop more targeted therapeutic approaches. This project will investigate the role that two proteins—Ly6e and Lynx1—play in various processes involved in the development of neuropathic pain, such as the activity of pain-triggering sensory neurons, interactions between neurons and immune cells, and the activity of an ion channel that has been implicated in the generation of pain signals.