Funded Projects

High rates of relapse and overdose deaths pose significant challenges to the treatment of Opioid Use Disorder (OUD). Anti-opioid immunotherapies (i.e., vaccines and monoclonal antibodies) have great potential to reduce long-term opioid use and overdose, with minimal risk of side effects, when used in conjunction with pharmacological treatments and/or behavioral therapies. The ability of an anti-opioid vaccine to induce antibodies that render an opioid less effective, or less rewarding, and protect from accidental overdose could provide an important therapeutic option for patients undergoing treatment for OUD. The goal of this collaborative study is to design, develop, and evaluate vaccines for use in the treatment of opioid use disorder

High rates of relapse and overdose deaths pose significant challenges to the treatment of Opioid Use Disorder (OUD). Anti-opioid immunotherapies (i.e., vaccines and monoclonal antibodies) have great potential to reduce long-term opioid use and overdose, with minimal risk of side effects, when used in conjunction with pharmacological treatments and/or behavioral therapies. The ability of an anti-opioid vaccine to induce antibodies that render an opioid less effective, or less rewarding, and protect from accidental overdose could provide an important therapeutic option for patients undergoing treatment for OUD. The goal of this collaborative study is to design, develop, and evaluate vaccines for use in the treatment of opioid use disorder

Quality implementation of evidence-based programs (EBPs) in community settings for youth is critical for reducing the burden of alcohol, tobacco and other drug (ATOD) use and its consequences. EBPs delivered in schools are an efficient way to reach large populations of young people, including those underserved by other settings, and reduce and prevent ATOD use. Yet youth rarely receive EBPs as intended in community settings, including schools. This training and research plan will prepare the investigator to become an independent scholar in the implementation of theories and frameworks to better understand factors related to program delivery—approaches to enhancing ATOD programs for youth in community settings. More specifically, the training will allow him to expand the application of Consolidated Framework for Implementation Research (CFIR) to inform approaches to enhancing effective EBP delivery. The proposed training and research plan extends current implementation research to focus applying implementation theories, frameworks and strategies in other community settings (schools) and on economic evaluation of implementation strategies. The results are expected to improve current efforts to deliver EBPs in diverse community settings and aid in applying evidence-based implementation strategies in the school context to ultimately reduce and prevent ATOD use among youth.

Evidence-based behavioral treatments for pain are among the most effective and safe approaches, but they are underused, especially among patients taking opioids long-term. Despite known risks to long-term opioid therapy (including opioid use disorder and overdoses), patients may be reluctant to try something different to manage their pain. This project brings together two evidence-based behavior change interventions—motivational interviewing and contingency management—into an online format. The research will test whether web-based tools or mobile apps influence a patient’s willingness to consider using non-medication treatments for pain. The research will assess feasibility, acceptability to patients and providers, and broad-scale implementation.

The incidence of Neonatal Opioid Withdrawal Syndrome (NOWS) in the United States has increased more than fivefold since 2004 to almost 7 per 1,000 hospital births. It is unknown how these effects are modulated by associated maternal, neonatal, and environmental factors and how the environment, maternal health, and parenting styles modify trajectories of brain connectivity and neurodevelopment. This study leverages the established infrastructure and longstanding collaborations of four clinical sites and the data coordinating center of the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network to address current critical knowledge gaps in childhood brain structure and connectivity and on medical, developmental, and behavioral trajectories in early childhood. The study will analyze a well-characterized observational cohort using clinical and neuroimaging measures to improve understanding of the structural and functional sequelae resulting from prenatal opioid exposure and NOWS and their interactions with the maternal-infant dyad.

Chronic pain may be linked to poorer outcomes in those using medication-assisted treatments (MAT) to treat opioid use disorders (OUD). Psychosocial interventions for pain have been effective in patients with chronic pain and substance use disorders, but these interventions have not been thoroughly examined in the OUD population receiving MAT. The study team previously refined and adapted a psychosocial pain management intervention (PPMI) to be delivered by telephone for patients with OUD receiving MAT. The current study will understand the potential applicability of this intervention to other high-risk groups, such as veterans, study the longer-term impact of PPMI, and gather data to inform the implementation of PPMI in MAT patients. This work will provide a robust test of the PPMI intervention to help enhance MAT outcomes in a larger and more representative group of participants while also paving the way for future implementation of interventions to improve MAT retention.

Opioids remain the gold standard for treating moderate to severe pain, but their use is limited by numerous adverse effects, including tolerance, dependence, abuse, and overdose. Adverse effects could be avoided by combining an opioid with another drug, such that smaller doses of the opioid (in combination with another drug) produce the desired therapeutic effect. Direct-acting serotonin type 2 (5-HT2) receptor agonists interact in a synergistic manner with the opioid morphine to produce antinociceptive effects, suggesting a 5-HT2 receptor agonist could be combined with small amounts of an opioid to treat pain, thereby lowering the risk associated with larger doses. Unfortunately, very little is known about interactions between 5-HT2 receptor agonists and other opioids. The proposed studies will evaluate the therapeutic potential of mixtures of opioids and 5-HT2 receptor agonists using highly translatable and well-established procedures to characterize the antinociceptive, respiratory-depressant (overdose), positive-reinforcing (leading to misuse), and discriminative-stimulus (subjective) effects of drug mixtures as well as the impact of chronic treatment on the development of tolerance to and physical dependence on opioids. If successful, these studies will provide proof-of-concept for this innovative approach to pain treatment and evaluate the utility of targeting 5-HT receptors for analgesic drug development.

The ongoing opioid crisis has led to renewed concerns about the clinical prescription of addictive opioid analgesics. However, there are currently no suitable alternatives for treating severe or malignant pain. Studies of opioid signaling mechanisms in mice deficient in ?-arrestin have suggested that biased agonists displaying preferential activation of G-protein signaling over ?-arrestin signaling could offer a promising avenue for the development of opioid analgesics with a reduced adverse effects profile. However, there is no concluding evidence showing that such biased signaling can indeed be associated with reduced opioid side effects and, consequently, an improved safety profile. This research will address the need for preclinical data to rigorously evaluate this hypothesis with a program of in vivo studies to compare the effects of “balanced” opioids (morphine, oxycodone, and fentanyl) with that of the “biased” agonists PZM21 and two novel ligands provided by colleagues at the NIDA IRP in nonhuman primates. The results of these studies will provide critical information regarding the dependence liability of “biased” agonists that, in clinical practice, might be given on a repeated, or chronic, basis, potentially adding a powerful new tool for the safer management of severe or malignant pain.

Washington state used federal Opioid-STR funding to develop the Washington State Hub and Spoke Model (H&S), an integrated care model to expand access to OUD medications by incorporating primary care and substance use treatment programs, referral organizations, nurse care managers, and care navigators. Based on the initial success, Washington provided more funding and developed a second-generation, low-barrier H&S model, to place medication initiation sites in nontraditional settings, such as emergency departments, syringe exchanges, jails, and homeless shelters, and to have community partners offer OUD medication maintenance. The study will determine the implementation and effectiveness of the new H&S model, maintaining a hybrid effectiveness-implementation approach, and utilizing social network analysis to understand how H&S networks develop to serve the OUD population. The findings will demonstrate what makes the H&S model effective for increasing OUD medication treatment, improving outcomes for people with OUD, and reaching individuals who may not seek treatment.

There is an urgent need for novel substance use disorder treatments aimed at treating polysubstance use disorders, such as opioid and methamphetamine co-use. One promising new target is the peptide ghrelin, which recent studies have implicated in drug- and reward-relevant behaviors. This research project will investigate the recently identified enzyme, ghrelin deacylase, that affects the activity of ghrelin to attenuate the rewarding and reinforcing effects of fentanyl and heroin in combination with methamphetamine. The researchers will also design and test new, long-acting forms of ghrelin deacylase that may be potential therapeutic candidates for the treatment of polysubstance use disorders.

Currently available treatments for opioid use disorder (OUD) are insufficient for many patients. Novel compounds that can promote alterations in brain connections (i.e., neural plasticity) possess enormous potential for improving substance use disorder (SUD) treatments. Psychedelic compounds induce neural plasticity and can elicit long-lasting, beneficial impacts on a wide variety of SUDs. However, these compounds have significant side effects, including hallucinations and cardiotoxicity. Researchers have developed a novel, synthetic derivative of the psychedelic ibogaine, called tabernanthalog, that does not have these side effects. This compound has demonstrated both short- and long-term therapeutic effects in a preclinical model of OUD. This research study will determine the molecular and neural mechanisms through which tabernanthalog affects opioid seeking. It will also evaluate whether the effects are specific to opioids and do not alter response to natural rewards and will examine the efficacy of tabernanthalog in a preclinical model of comorbid opioid and alcohol use disorder.

Novel treatments for opioid use disorder are urgently needed. Previous research has shown that angiotensin-converting enzyme (ACE) can control levels and activity of natural, “endogenous,” opioids in a way that might reduce the rewarding effects of opioids like fentanyl. ACE inhibitors have been used to treat hypertension for decades, with no evidence of addiction or dependence. This research will evaluate ACE effects on endogenous opioids toward generating new, domain-specific ACE inhibitors with optimized properties for treating opioid use disorder. The research will also test the behavioral impact of these compounds in preclinical models of opioid use disorder. 

Given recent increases in co-use of opioids and methamphetamine, there is a dire need for novel treatment strategies that prevent relapse to drug use in both opioid use disorder (OUD) and methamphetamine use disorder (MUD). The localization of certain receptors for the neurotransmitter glutamate—metabotropic glutamate receptor subtypes 2 and 3 (mGlu2/3)—and the mechanism through which they transmit signals, strongly suggest that activation of both of these receptors will effectively treat multiple symptoms that contribute to relapse, such as responsiveness to drug cues, physical withdrawal symptoms, neuroinflammation, and sleep disturbances. This project seeks to evaluate molecules that can activate mGlu2/3 receptors without binding to the same site as glutamate (i.e., positive allosteric modulators) as a novel pharmacological treatment for preventing relapse to OUD. The research also will examine the potential of such modulators for treating MUD.