Funded Projects

Effective medications for opioid use disorder (MOUD) are approved by the Food and Drug Administration for the treatment of people with opioid use disorder; however, only a small fraction of patients who would benefit from these medications actually use them. Several reasons contribute to low MOUD use, including lack of insurance; lack of knowledge about the medications, both among patients and providers; stigma associated with MOUD; and social norms. Innovative methods are needed to help increase MOUD use. One such option is peer-led interventions that might increase patients’ interest in MOUD. One existing peer-led intervention is the Harnessing Online Peer Education (HOPE) online community intervention that has been designed to reduce stigma and increase health behavior change among stigmatized populations, such as people living with HIV. This project will investigate whether and how HOPE can be adapted for people with opioid use disorder. It will assess whether HOPE can effectively increase MOUD requests, MOUD uptake, and sustained adherence to MOUD as well as reduce overdose rates.  

Poor medication-assisted treatment (MAT) retention disproportionately affects low-income racial/ethnic minority individuals with opioid use disorder (OUD) and increases risk for relapse; therefore, evidence-based interventions are needed to improve MAT retention. Peer recovery coaches (PRCs), trained individuals with experiences with substance use disorder, may be uniquely suited to address common MAT retention barriers among underserved populations, including stigma, challenges navigating services, housing instability, and other structural and psychosocial factors. Preliminary work by the research team suggests that behavioral activation (BA) by PRCs may be a feasible, scalable reinforcement-based approach for improving MAT retention for low-income minority OUD individuals. The study builds upon the research team’s formative work to adapt and evaluate the effectiveness and implementation of a PRC-delivered BA intervention (Peer Activate) to improve MAT retention for low-income, minority individuals with OUD.

Chronic low back pain (CLBP) is a problem affecting millions of Americans. Psychosocial approaches are efficacious for addressing the multidimensional nature of CLBP. Three of the most widely implemented nonpharmacological techniques for CLBP management are cognitive therapy (CT), mindfulness meditation (MM), and behavioral activation (BA). However, there is a critical lack of research examining if these techniques work via the mechanisms specified by theory. Ecological momentary assessment (EMA) and ActiGraph technology embedded within a randomized controlled trial, consisting of daily measures of process and outcome, is ideal for testing mechanism models both during treatment and during the critical period following treatment. The current proposal seeks to utilize EMA and ActiGraph to examine if changes in cognitive content, cognitive process, and activity level are mechanisms specific to CT, MM, and BA, respectively, for reducing pain interference. Elucidating the mechanisms of pain coping skills will lead to streamlined CLBP interventions.

MAT is the most effective intervention for opioid use disorder (OUD), and methadone maintenance treatment (MMT) is the most commonly prescribed MAT; however, approximately half of people who begin MMT discontinue within a year, and half of people retained in MMT have an opioid relapse within six months. Chronic pain, affecting most people on MMT, could be contributing to relapse in this group. Novel behavioral interventions that address both chronic pain and opioid relapse among people on MAT are needed. Mindfulness Oriented Recovery Enhancement (MORE) was recently developed to treat both pain and opioid misuse. MORE is a group intervention that combines training in mindfulness, cognitive reappraisal, and positive emotion regulation skills to target the dysfunctional cognitive, affective, and behavioral pathways that lead to opioid use relapse. The objective of this proposal is to examine the impact of MORE on opioid relapse and chronic pain among individuals receiving MMT.

For individuals with moderate to severe opioid use disorder (OUD), medication-assisted treatments (MATs) such as oral methadone and extended-release naltrexone (XR-NTX) are the gold standard in initiating and maintaining long-term recovery. Still, many patients struggle with persistent sleep disturbance and stress reactivity in the early stages of recovery, which drive relapse behaviors. This proposal constitutes a novel mechanistic approach to understanding the role of the orexin system in sleep disturbance and circadian rhythms of stress in OUD patients who are maintained on MATs and are early in recovery. This study will determine whether the FDA-approved sleep medication suvorexant (SUVO) improves sleep continuity and decreases diurnal measures of stress, and whether improvement of sleep/stress processes translates to improved OUD treatment outcomes. Its findings will fill critical gaps in our understanding of the role of the orexin system in sleep disturbance and circadian rhythms of stress that impact OUD recovery.

Among the most common symptoms experienced by individuals suffering with opioid use disorder (OUD) are severe sleep and circadian disruptions. The relationship between opioid dependence and sleep and circadian systems is not well understood. A circadian-dependent mechanism has been shown to modulate fentanyl reward-related behaviors in the nucleus accumbens (NAc). The study team will use a combination of behavioral, slice electrophysiology, and molecular approaches to 1) investigate the role of the circadian transcription factor NPAS2 in medium spiny neurons with dopamine 1 (D1R-MSNs); 2) assess the impact of fentanyl on synaptic plasticity at D1R-MSNs and investigate whether NPAS2 mediates the potentiation of excitatory synapses at specific diurnal phases; 3) elucidate the cell-type-specific NPAS2-dependent transcriptional mechanisms of fentanyl-seeking and relapse behaviors; and 4) investigate whether NPAS2 rescue and buprenorphine medication-assisted treatment (MAT) improve fentanyl-induced sleep disturbances. This study will define the role for circadian-dependent transcriptional mechanisms and uncover the therapeutic potential of NPAS2 for opioid dependence and relapse.

Profound sleep disturbances during abstinence have long been suspected of perpetuating vulnerability to relapse of people who misuse or are addicted to opioids. An animal model has shown that long-term sleep deficiency results in a persistent state of physiological dysregulation that is expected to modify the biology of abstinence and increase relapse potential. This study seeks to discover how persistent sleep restriction during withdrawal from opioid use increases vulnerability to relapse in the animal model by testing whether persistent sleep restriction during abstinence from opioid use is sufficient to increase opioid drug seeking. The functional outcome measure will be the degree of mitigation of opioid seeking. These studies will provide a basis for novel translational approaches to target mechanisms that are demonstrated to cause increased vulnerability to relapse.

Chronic pain and opioid use disorders (OUD) are burgeoning interrelated epidemics. Sleep disturbances are prevalent, treatable, and increasingly recognized as risk factors for both chronic pain and OUD. Sleep disruption impairs endogenous pain inhibition, linked to analgesic efficacy and rewarding properties of mu-opioid receptor (MOR) agonists. It is not known, however, whether sleep disturbance causally alters mechanisms that contribute to OUD risk. Sleep continuity disruption (SCD) and/or sleep fragmentation (SF) may alter cerebral MOR availability, and these forms of sleep disruption may increase OUD risk. This study aims to 1) evaluate whether experimental SCD and/or SF alter resting or pain-evoked MOR binding potential (BP) in brain regions associated with pain inhibition; 2) examine whether SCD and/or SF alters the analgesic response; and 3) determine whether MOR BP in brain regions of interest are associated with analgesia and abuse liability.

Opioid use disorder (OUD) is a chronic and relapsing brain disease that affects over 2 million Americans. Despite effective evidence-based treatments in the form of behavioral interventions and FDA-approved medication for addiction treatment (MAT), relapse rates are high. The Collaboration Linking Opioid Use Disorder and Sleep Study will investigate patients on MAT to elucidate potential causal mechanisms between sleep deficiency and OUD. The aims of this study are to 1) test whether there are different neurocognitive connectivity patterns between patients with adequate vs. deficient sleep in brain systems involved in addiction and assess the extent to which these “neural fingerprints” predict ongoing opioid use; 2) evaluate the potential biologic, psychiatric, and pharmacologic mechanisms that explain the causal pathway between sleep deficiency and opioid use; and 3) test ecologic factors such as psychosocial, family, and neighborhood contextual factors associated with OUD and their contribution to sleep deficiency among patients in MAT.

Substance use disorders (SUDs) can have devastating consequences for people with serious mental illness (SMI). SUDs can increase morbidity and mortality and are associated with higher healthcare and social costs, homelessness, and incarceration. Unfortunately, despite the availability of effective treatments, most individuals with co-occurring SMI and SUD (COD) never receive SUD treatment. We propose to evaluate system, provider, and patient-level facilitators and barriers and develop an implementation strategy and toolkit to promote the use of medication-assisted treatment (MAT) for people with COD. Aims 1–3 seek to assess organizational capacity (at the system and provider level); organizational readiness (at the provider level); and perceived needs, attitudes, and preferences (at the patient level) to identify barriers and facilitators. In Aim 4, we will use findings from Aims 1–3 to guide development of the implementation strategy and toolkit, using stakeholder input and a systematic process for strategy development.

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