Funded Projects

Sleep and circadian rhythms are understudied risk factors for opioid use disorder (OUD) and its treatment. Opioids affect sleep quality in a way that can inhibit recovery. The two most effective medications for OUD also cause sleep problems. This project will increase understanding about underlying circadian and behavioral mechanisms, such as changes in craving and/or the ability to regulate emotions, that link poor sleep with suboptimal opioid treatment response outcomes.

Human oral cancer is associated with significant chronic pain, and a comprehensive understanding of the biology and mechanisms underlying this chronic pain is critical for developing better pain management strategies. This project will determine molecular characteristics, including a specific signaling system (endosomal GPCR kinase), associated with chronic oral cancer pain, using tissue samples obtained from patients with this condition. The findings will then be used to inform studies in animal models of human oral cancer pain to enhance understanding how endosomal GPCR kinase contributes to human oral cancer pain.

Chronic pain results in long-term changes throughout the central nervous system. These include abnormal structure and function of the frontal cortex region of the brain, which relays pain messages and also the common pain-related conditions depression, anxiety, and cognitive impairment. Peripheral nerve injury results in widespread and long-lasting changes to DNA in the frontal cortex. DNA methylation, in which chemical tags are attached to DNA, is one way the body controls the activity of genes over time. This control occurs via proteins that recognize tagged DNA, and some of these proteins do not work properly in the frontal cortex many months after nerve injury. These changes occur after nerve injury and are linked to mechanical sensitivity. This project will determine this DNA-binding protein is a good target for finding new medications for chronic pain. 

Exposure to prescription opioids during pregnancy can alter growth of the fetus and cause persistent neurological problems during childhood. This project will identify biological underpinnings of oxycodone exposure on health of the placenta, brain development of the fetus, and behavioral problems observed in early infancy. This research will also assess whether melatonin supplementation can limit these harmful outcomes. Overall, the research aims to characterize the health effects of oxycodone used during pregnancy, as well as to point to new tools and molecular indicators (biomarkers) for diagnosing, treating, and preventing opioid harm to the fetus and mother.

This project addresses the significant challenge of providing evidence-based, non-pharmacologic pain management to veterans with chronic pain living in rural regions. This research will test whether an innovative, virtual complementary and integrative group-based treatment will improve rural veterans’ pain management, function, and well-being. The research will also devise, evaluate, and adapt strategies for implementing this intervention while working with the health care system, veteran patients, and communities. The scalable, 12-week intervention includes pain education, mindfulness, pain-specific exercises, and cognitive behavioral strategies.

Medications for opioid use disorder (OUD) are safe and effective. However, many people do not take them long enough to achieve sustained recovery, putting them at risk of overdose. Peer recovery support services—which are delivered by trained individuals with lived experience of addiction and recovery—may help people with OUD initiate and stay in medication treatment. This project will adapt peer recovery support services for use in outpatient substance use treatment settings and test their implementation and effectiveness in helping people with OUD achieve long-term recovery. If successful, the program could be implemented in a variety of outpatient treatment programs, including in underserved rural areas.

There are currently no reliable tools to measure pain objectively, and health care providers must rely on patient’s subjective reports and observations of patient behavior to determine the level of pain a person experiences. This hampers both effective pain management and the development of new pain medications. This project will assess an imaging technology called Radiocaine that in animal studies has been able to identify the origin of pain as well as its intensity. The goal is to use Radiocaine in clinical trials for pain treatments, thereby enhancing treatment effectiveness and facilitating development of new treatments.

Decreasing opioid dosing faster than advised by clinical recommendations often leaves chronic pain unaddressed and may increase the risk of overdose and suicide compared to continuing long-term opioid treatment. The MIRHIQL Resource Center will provide infrastructure support for the network as well as create a risk-benefit decision tool to help providers determine when opioids should be continued as prescribed, tapered, or tapered/discontinued. The center will first develop and validate a clinical definition for individuals who take long-term opioids, then study long-term outcomes in participants who receive treatment in primary care settings. This research will partner with many groups including individuals with lived experience, community health care providers who treat such individuals, research scientists, bioethicists, and professional societies

There is an urgent need for longer acting opioid overdose reversal medications to treat acute fentanyl intoxication and overdose. This project will develop a novel molecule (CS-1103) that sticks to fentanyl and removes it from the body. Previous research with animal models shows that CS-1103 has several features that make it attractive for a new medication. It can reverse fentanyl-induced respiratory depression, preventing another overdose; work in combination with naloxone; and appears to be safe and well-tolerated. The research will continue exploration of CS-1103 toward testing CS-1103 in human research participants.

Medications used to treat opioid use disorder (OUD) such as methadone and buprenorphine can cause central sleep apnea—a condition in which an individual momentarily stops breathing during sleep. This project will evaluate whether central sleep apnea, by worsening sleep quality and causing low blood oxygen levels, leads to nighttime arousal and emotional distress, which in turn increases the risk of relapse in individuals receiving treatment for OUD.

Neuropilin 1 receptor (NRP1) is a protein receptor that is active in neurons and is hypothesized to be a key mediator of sensory neuron sensitization that can lead to pain. This project will study the cellular mechanisms by which NRP1 leads to sensitization and which cell types—sensory neurons, microglia, or both—are responsible for NRP1’s role in pain. The findings can help validate NRP1 in sensory neurons and the spinal cord as a target to treat pain following nerve injury.

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. 

Opioid use during pregnancy is associated with significant harmful health outcomes for infants including preterm birth, neonatal opioid withdrawal syndrome, and impaired brain-related problems. This project will combine advanced imaging of the fetal brain and placenta, genetics, and tissue and blood samples from the placenta to determine how opioid use during pregnancy affects development of the fetal brain and placenta. This research will provide novel and early molecular indicators (biomarkers) to as well as identify new strategies for diagnosing, treating, and preventing opioid harm to the fetus and mother.