Funded Projects

This project is focused on identifying the clinical, genetic, and neural characteristics that convey risk for prescription opioid addiction. We will leverage the central biorepository and electronic health record (EHR) database of the Geisinger Health System to conduct large-scale genomics research and phenotype development. Through a collaboration with Regeneron Pharmaceuticals, the Geisinger biobank currently contains DNA samples on about 110,000 participants and includes both Illumina OmniExpressExome genotyping and whole exome sequence data, including common and rare variants, from over 60,000 of these subjects. This discovery cohort contains thousands of chronic musculoskeletal pain patients who have been taking greater than 120 mg equivalents of morphine for more than three months. Using EHR and self-report tools to develop a case definition and quantitative scoring, we will derive a clinical/genetic profile of prescription opioid addiction. This profile will be enhanced via integration of neuroimaging data.

The HEALthy Brain and Child Development National Consortium (HBCD-NC) will establish a normative model of developmental trajectories over the first 10 years of life. All sites in the HBCD-NC will carry out a common research protocol and will assemble and distribute a comprehensive research dataset to the scientific community. The HBCD-NC will collect neural, behavioral, physiological, and psychological measures, as well as biospecimens, to characterize neurodevelopmental trajectories. Most participants will be recruited in the second trimester of pregnancy, with a smaller subset recruited at birth, and followed for the first 10 years of life. This study will take place at Washington University in St. Louis, Missouri, and will recruit participants from an urban environment with a high African American population.

Little is known about what motivates people to use multiple drugs. Understanding these factors is important for tailoring treatment services. Behavioral economic theory, which determines how much value individuals assign to drugs and potential negative consequences, provides a framework to understand the choices people make. This project will identify patterns, motivating factors, and long-term trajectories of opioid-involved polysubstance use behaviors and treatment. This research will use a range of methods to analyze substance use episodes as well as examine motives and preferences associated with polysubstance use behaviors and how they change over time. The findings will be combined into a toolkit to inform timing, type, and tailoring of interventions and policies to guide implementation of effective clinical strategies and policies for managing polysubstance use in healthcare systems.

Hospital inpatient stays due to opioid-related health problems are a reachable moment for increasing access to treatment with medications for opioid use disorder (MOUD). Hospitalized patients with opioid use disorder (OUD) are at particularly high risk for morbidity, mortality, and high medical costs in the U.S. This study will substantially inform the care management of OUD in hospitalized patients. The project includes a comparative effectiveness research trial and an implementation research trial, which will lead to models of broad dissemination for treatment approaches to this largely unaddressed population. They will examine whether (1) in hospitals with addiction medicine consultation services, hospital-initiated extended-release buprenorphine (XR-BUP), compared with other OUD medications, results in increased engagement in treatment with MOUD following hospital discharge and (2) training hospitals without such consultation services on best practices for initiating MOUD using consultation service hubs improves medication uptake in hospitals and increased MOUD treatment engagement following discharge.

Despite increased efforts to understand the neurodevelopmental sequelae of in utero opioid and other substance exposure on long-term behavioral, cognitive, and societal outcomes, important questions remain, specifically, 1) How is brain growth disrupted by fetal substance and related pre- and post-natal exposures? and 2) How are these disrupted growth patterns causally related to later cognitive and behavioral outcomes? This project seeks to formulate an approach to addressing these key questions and decipher the individual and cumulative effect of these intertwined pre- and post-natal exposures on child neurodevelopment. First, researchers will address the legal, ethical, and mother-child care and support concerns implicit in this study. Next, they will integrate across our areas of neuroimaging expertise to develop, implement, and harmonize a multi-modal MRI and EEG protocol to assess maturing brain structure, function, and connectivity. Finally, researchers will develop and test advanced statistical approaches to model and analyze this multidimensional and longitudinal data.

Negative Affect (NA) and stress are key features of Opioid Use Disorder (OUD) and often lead to drug use and relapse. The Autonomic Nervous System (ANS) dominates physiological responses to emotions and stress, yet its function and how it unfolds over time and in real-world settings remains understudied in the context of OUD. With new wearable technologies, ANS function can be measured through heart rate variability (HRV) and can be recorded continuously via wearable sensors, providing a non-invasive method to examine physiological mechanisms underlying stress and NA in real-world settings and in real-time. The present research will serve as a pilot study to assess 1. The role of autonomic function (indexed by HRV) as a marker of NA and stress in people with OUD 2. Participants’ adherence to wearing sensor devices and response rates to daily questionnaires. To achieve these objectives, we will monitor participants for 14 days and quantify self-reports measures of stress, overall daytime HRV patterns, and the magnitude, frequency, and duration of reduced HRV instances. Our findings can help advance technologies to address the opioid epidemic, and our understanding of physiological markers as objective measures and predictors of NA and stress in OUD.

There is an urgent and unmet clinical need for a reliable technology to prevent maternal opioid use relapse and neonatal opioid withdrawal syndrome (NOWS) in their infants. This project aims to assess risk for these outcomes based on individual genetic and clinical factors. The research will expand previous studies of genetic and clinical predictors of opioid-related adverse outcomes. The goal is to develop a risk predictor algorithm and software tool for use in an electronic health record, toward personalized risk assessment and prevention of maternal relapse and NOWS. 

Analgesia for post-operative populations remains a significant health need that calls for innovative therapies which improve both safety and outcome measures. Recent FDA drug safety warnings and studies focusing on post-operative analgesia have highlighted the imperative need for new approaches that can be utilized for common clinical scenarios. Accordingly, novel treatment options that are safe and afford additional benefit in relief of pain are needed. In this proposal, the development of an innovative surgical sealant technology is proposed that functions at the level of the surgical wound bed and actively delivers local pharmacologic agents to therapeutically address post-operative pain. New formulations of several analgesic regimens will be assessed for their ability to seal wounds and provide appropriate pain management.

It is unclear if long-term use of opioids by head and neck cancer patients affects risk for depression, which is higher in this population compared to people without cancer. This knowledge could inform interventions such as increased opioid prescription safety or alternative pain management approaches and could thus help reduce the risk for depression-related outcomes. This project will use data from a national cancer database linked to Medicare claims and a Veterans Administration database to determine whether people with head and neck cancer that take opioid medications for more than 90 days have increased risk for new-onset or worsening depression or suicide death.

Critical limb ischemia is the most severe form of peripheral artery disease, is very painful, and can lead to amputation and even death. Most patients with this condition live with chronic pain, but comprehensive and effective treatment is lacking. This project will use existing data from three databases to study medical pain management approaches used over time by individuals with critical limb ischemia – toward creating an integrated, patient-centered, and multimodal pain management approach for this condition.

An important step for identifying new, non-addictive chronic pain treatments is the search for new, non-opioid molecular targets that reflect the human condition. Recent findings show an increase in levels of two proteins (calcium channel alpha-2delta-1 subunit and thrombospondin) in sensory and spinal cord neurons after nerve injury. This increase is associated with the development of neuropathic pain. This project will determine if chronic injury to key nerve fibers involved in pain cause changes in rat behavior that indicate altered mood. These nerve fibers include the trigeminal nerve that communicates pain, touch, and temperature sensations from the face to the brain and the L5/6 spinal nerves often associated with back and leg pain. This research will also test whether small protein-like molecules (peptides) that block calcium channel alpha-2delta-1 subunit and thrombospondin also block the mood-related behaviors.

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.

Buprenorphine is used for treatment of opioid use disorder (OUD), and patients often take it for many years by slowly dissolving it in the mouth. In 2022, the U.S. Food and Drug Administration warned about possible oral complications from buprenorphine use, including tooth decay, oral infections, and tooth loss. However, this warning was largely based on small studies with no comparison group and no assessment of other risk factors such as limited dental care. This project will follow two groups of individuals with OUD who take either sublingual buprenorphine or methadone, to compare their oral health and understand barriers and facilitators of dental care. The results will be used to plan an intervention for preventing and treating oral diseases in this patient group.