Funded Projects

Though prenatal exposure to opioids and other substances have adverse effects on neurodevelopment, advances in neuroimaging and developmentally sensitive phenotypic measurement now enable characterization of typical and atypical brain-behavior pathways on an unprecedented scale. The Brains Begin Before Birth (B4) Midwest Consortium, a partnership of neuroscience, substance use, perinatal mental health, and child welfare scientists at Washington University School of Medicine (WUSM) and neuroscience, bioethics, pediatric population health, maternal-fetal, and addiction scientists at Northwestern University (NU). This regional consortium will leverage the contrasting approaches of Illinois (punitive) and Missouri (non-punitive) to prenatal opioid use, providing a platform for examining the impact of jurisdictional variations on science and practice. The consortium provide a framework for addressing three major areas of challenge: (1) legal/ethical, (2) recruitment/retention, and (3) imaging/assessment methods.

Neonatal abstinence syndrome (NAS) rates have increased since 2000. To determine multifactorial genetic, psychosocial predictors of opioid-related maternal and infant outcomes using rigorous prospective longitudinal design, innovative combinatorial pharmacogenetic approach, fetal MRI, and neonatal brain resting state functional MRI analysis, we hypothesize that a combination of maternal and infant genetic profiles, maternal psychosocial factors, maternal opioid treatment response, fetal and neonatal neurodevelopment, and NAS treatment will affect maternal and childhood outcomes with prenatal opioid exposure. The specific aims are to (1) Identify high-risk genetic profiles and psychosocial factors in pregnant women with opioid use disorder (OUD) and predisposing to poor maternal opioid maintenance treatment outcomes; (2) Determine maternal-infant genetic profiles and maternal opioid treatment factors predicting adverse fetal development, severity of NAS, and neonatal brain function; and (3) Develop predictive models for maternal opioid relapse and poor long-term neurodevelopmental outcomes in children with in utero opioid exposure.

Multi-protein complexes have emerged as a mechanism for spatiotemporal specificity and efficiency in the function and regulation of myriad cellular signals. In particular, many ion channels are clustered either with the receptors that modulate them, or with other ion channels whose activities are linked. Often the clustering is mediated by scaffolding proteins, such as the AKAP79/150 protein that is a focus of this research. This research will focus on three different channels critical to nervous function. One is the"M-type" (KCNQ, Kv7) K+ channel that plays fundamental roles in the regulation of excitability in nerve and muscle. It is thought to associate with Gq/11- coupled receptors, protein kinases, calcineurin (CaN), calmodulin (CaM) and phosphoinositides via AKAP79/150. Another channel of focus is TRPV1, a nociceptive channel in sensory neurons that is also thought to be regulated by signaling proteins recruited by AKAP79/150. The third are L-type Ca2+ (CaV1.2) channels that are critical to synaptic plasticity, gene regulation and neuronal firing. This research will probe complexes containing AKAP79/150 and these three channels using"super-resolution" STORM imaging of primary sensory neurons and heterologously-expressed tissue-culture cells, in which individual complexes can be visualized at 10-20 nm resolution with visible light, breaking the diffraction barrier of physics. The researchers hypothesize that AKAP79/150 brings several of these channels together to enable functional coupling, which the researchers will examine by patch-clamp electrophysiology of the neurons. Förster resonance energy transfer (FRET) will also be performed under total internal reflection fluorescence (TIRF) or confocal microscopy, further testing for complexes containing KCNQ, TRPV1 and CaV1.2 channels. Since all three of these channels bind to AKAP79/150, the researchers hypothesize that they co-assemble into complexes in neurons, together with certain G protein-coupled receptors. Furthermore, the researchers hypothesize these complexes to not be static, but rather to be dynamically regulated by other cellular signals, which the researchers will examine using rapid activation of kinases or phosphatases. Several types of mouse colonies of genetically altered AKAP150 knock-out or knock-in mice will be utilized.

This project aims to develop a novel abuse deterrent formulation (ADF) that will be uniquely designed to prevent abuse of the prescription pill. The study will focus on the development of the ADF with design aspects specifically focused on abuse through insufflation, smoking, injection, and taking multiple pills. The study will also validate the design by putting the pill through a rigorous test following the procedures outlined by the FDA Abuse-Deterrent-Opioids-Evaluation and Labeling guidelines. The study could result in the development of a novel ADF that will be resistant to a wide range of tampering, resulting in a safer formulation and pill design.

More than 100 million adults in the U.S. suffer from intermittent or constant chronic pain, and chronic pain affects at least 10 percent of the world’s population. The primary pharmaceuticals for treatment of chronic pain have been natural or synthetic opioids, and the use of opioids for pain treatment has resulted in what has been called an “epidemic” of opioid abuse, addiction, and lethal overdoses. Through a process of rational drug design, the research team has generated a new chemical entity (NCE) and have given it the name Kindolor, a non-opiate, non-addicting molecule that was shown to reduce or eliminate chronic pain in five animal models at doses compatible with use of Kindolor in humans. This project intends to complete the pre-clinical studies required for an IND application, which, if approved, would allow for proceeding onto the Phase 1 and 2 studies to assess safety and efficacy of the compound against osteoarthritic pain.

Very little research has been conducted on better understanding of phenotypic characterization of individuals with OUD (beyond DSM-5 diagnoses) and how these features predict illness severity, treatment retention or outcomes. The primary objective of the deep phenotyping study is to provide a comprehensive phenotypic characterization (e.g., domains of negative affect, reward salience, cognitive control, mental health) of a heterogeneous sample of individuals (n = 1,000) who currently meet one or more DSM-5 diagnostic criteria for OUD and are in treatment for OUD. In a subset of this sample (n = 100), the investigators conduct digital phenotyping to examine the utility of ecological momentary assessment (EMA), digital sensing and social media to predict retention, medication adherence and opioid use outcomes in patients receiving buprenorphine for OUD. It is anticipated that this foundational study will inform the feasibility and utility of such assessments that can be successfully embedded into imminent and future CTN and other OUD clinical trials.

Morbidity and mortality related to prescription opioids are accelerating in the United States. Identifying the factors that lead to new opioid dependence among opioid naïve patients is a critical opportunity to reduce prescription opioid dependence and unintended diversion. In the United States, the majority of individuals who become opioid dependent receive their first opioid prescription following surgical procedures, yet there are no clinical guidelines to inform appropriate postoperative opioid use. We will examine the patient factors that are associated with postoperative pain and opioid consumption among a cohort of patients undergoing common elective abdominal procedures. We will identify the provider characteristics in postoperative opioid prescribing practices, and design and implement a provider-directed intervention to optimize postoperative opioid prescribing. Findings will inform patients and providers regarding the risk of opioid dependence following surgery, and will establish a patient-centered data infrastructure that yields continuous feedback to providers regarding appropriate opioid prescribing practices.

This study will (1) test pharmacologic and behavioral strategies to improve OUD pharmacotherapy treatment retention and to improve outcomes among patients who have been successfully stabilized on OUD medications and want to stop medication and (2) identify predictors of successful outcome and develop a stage model of relapse risk.

Levo-alpha-acetylmethadol (LAAM) offers numerous behavioral and clinical advantages for select opioid use disorder (OUD) patients who do not respond to standard treatment. While LAAM was withdrawn from the market despite being approved for OUD treatment, this project seeks to develop novel, patentable, convenient dosage forms of LAAM, including novel LAAM oral dosage formulations and novel buccal film formulations of LAAM. Morphology, mechanical property, drug release kinetics, and stability of the oral dosage and buccal film formulations will be characterized to determine the instant release or steady release of LAAM, respectively. The two lead LAAM formulations with adequate release and stability profiles will be chosen through optimization studies both in vitro and in vivo. A human pharmacokinetic/pharmacodynamic study will then be carried out on the two selected formulations.

Mismanagement of orofacial chronic pain, such as temporomandibular joint and muscle disorders (TMJD) and oral cancer, substantially contributes to opioid overuse; overdose-related deaths; and cardiovascular, renal, and neurological complications at epidemic proportions. The current paradigm implies that orofacial conditions could trigger maladaptation of the immune system and plasticity supporting persistent inflammation, which influences the development and maintenance of orofacial chronic pain. LIGHT (TNFSF14) and Lymphotoxin-beta (LT?), members of the tumor necrosis factor superfamily, provide a balance between protective immunity and immunopathology during chronic inflammatory diseases. This project will test the hypothesis that targeting LIGHT and LT? signaling could prevent the development and inhibit the maintenance of chronic pain produced by TMJD and oral cancer, via peripheral mechanisms involving plasticity of immune, stromal, and tumor cells, as well as sensory neurons. The proposed research is significant as it advances our understanding of mechanisms regulating the development and maintenance of orofacial pain and offers new therapeutic targets and an immunotherapeutic approach for preventing and blocking chronic pain during TMJD and oral cancer.

This health care data mining study analyzes existing Veterans Health Administration data sets to examine patient and organizational characteristics associated with buprenorphine termination during outpatient OUD treatment. This project will generate data useful for predictive modeling on how to implement targeted approaches to improve retention in OUD treatment. An objective is to identify patient, provider and system targets to reduce unnecessary or inappropriate discontinuation of buprenorphine care. These analyses are critical for establishing initial constructs to evaluate reasons for treatment discontinuation based upon patient, provider and system factors in different health care settings.

The emergency department (ED) is an ideal venue to reach and intervene with adolescents and young adults (ages 16-30) at risk for opioid misuse, particularly as young adults may disconnect from primary care when transitioning out of pediatric medicine. This study will evaluate the efficacy of interventions of varying type/intensity to prevent/reduce opioid misuse or opioid use disorder (OUD). The research leverages technology that is appealing to youth to facilitate intervention delivery by health coaches. In this study, adolescents and young adults in the ED screening positive for opioid use or misuse will be randomly assigned to one of four intervention conditions with outcomes measured at 4, 8, and 12 months. Technology-driven, scalable interventions delivered via health coach allow for real-time tailoring to the rapidly changing opioid epidemic, with the potential for a sustainable impact on preventing escalation of opioid misuse among adolescents and young adults.

Ethnic groups show substantial variability in the experience of acute and clinical pain, with African Americans (AAs) having more clinical pain conditions and higher levels of pain severity and pain-related disability compared to non-Hispanic whites (NHW). Ethnic differences in opioid neurotransmitters suggest that these systems function less efficiently among AAs and may account for differences in pain and analgesic responses. The overwhelming majority of clinically used opioids elicit their effects through activation of the mu-opioid receptor, making it a relevant target for investigation. We propose to examine ethnic differences in the supraspinal endogenous opioid system using positron emission tomography (PET) imaging of mu-opioid receptors employing the mu-selective agonist [11C]carfentanil. Healthy AAs and sex-, age-, SES-matched NHW participants will undergo one baseline (non-pain) and one capsaicin-induced pain PET session using [11C]carfentanil. The current proposal will measure µ-opioid binding potential and examine its role in ethnic group differences in pain sensitivity.