Funded Projects

Naloxone is a safe and effective opioid antagonist, but currently available products are burdened with high cost and limited accessibility due to a need for a prescription or being kept behind-the-counter. In response to the FDA putting out an unprecedented call for an over the counter naloxone product, Pocket Naloxone Corp. is developing a novel intranasal delivery method for naloxone intended to be low-priced and widely accessible. This project will culminate in a New Drug Application to the FDA for over-the-counter approval to meet the urgent need for widespread access to a reliable, easy-to-use naloxone product for use in an emergency by non-medical individuals.

Opioid use and addiction affects more than 2 million Americans and contribute to a large proportion of all drug overdose deaths. Current treatments for opioid use disorder (e.g., methadone and buprenorphine) are not always effective, may be misused, and can have side effects that discourage treatment continuation. Therefore, Cerevel Therapeutics is evaluating a novel compound, CVL-936, which targets brain molecules called dopamine D3 receptors. These receptors are involved in the brain’s reward and relapse pathways and are present in higher levels in people with addictions. In animal studies, the molecule reduced self-administration of nicotine and fentanyl, including in relapse situations. The project will test the safety and tolerability of CVL-936 in animals and healthy humans and will examine its effectiveness in reducing craving in people with 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.

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.

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.

Opioids can be effective analgesics but can also be fatal due to opioid-induced respiratory depression after overdose. This project will use cutting-edge molecular, physiological, behavioral, and imaging techniques to better understand and distinguish opioid-induced respiratory depression and opioid-mediated analgesia. Nerve cell-specific, single-cell transcriptomic analysis will be used to identify functional markers expressed in nerve cells that play a specific role in opioid-induced respiratory depression, but not opioid analgesia. This research study will help to identify novel therapeutic targets that could selectively rescue opioid-induced respiratory depression while maintaining the beneficial pain-relieving effects of opioids. 

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. 

Prescription opioids provide pain relief, but overdose can be fatal because opioids also depress breathing through opioid-induced persistent apnea, when breathing stops. This research will determine whether targeted activation of a specific, opioid-insensitive brain region that triggers exhalation can increase tolerance to fentanyl-induced apnea. The research also seeks to identify the receptors responsible for this exhalation, which could be targets for new medications that prevent the negative impact of opioids on breathing. This research lays the groundwork for more preclinical and translational studies to prevent opioid-induced persistent apnea. 

The widespread availability of fentanyl and other potent synthetic opioids has dramatically increased opioid-related fatal overdoses. This project will develop and manufacture immune molecules (monoclonal antibodies) to reverse and treat overdose from fentanyl by keeping it out of the brain. This research will advance promising results in animal studies (preventing and reversing fentanyl- and carfentanil-induced breathing problems and irregular heartbeat) to clinical testing in people with opioid use disorder and others at high risk of opioid overdose from accidental or deliberate exposure to fentanyl and fentanyl-like drugs.

There are currently no medications approved by the U.S. Food and Drug Administration to treat methamphetamine use disorder, even though risky patterns of methamphetamine use and overdose deaths have increased in recent years. Research using animal models shows that immune molecules that latch onto methamphetamine (anti-methamphetamine antibodies) show promise in blocking the effects of the drug. This project aims to identify a long-acting monoclonal antibody targeted to methamphetamine and conduct development and safety studies to prepare for future testing of the antibody treatment in humans.

Currently no medications are approved by the U.S. Food and Drug Administration to treat cocaine use disorder, which compromises cognitive function associated with achieving goals such as working memory, the ability to update information, and mental flexibility. This project will test whether  stimulating dopamine activity in the brain with the drug rotigotine (approved to treat Parkinson’s disease) is effective for treating cocaine use disorder. Past research has also shown that rotigotine can improve nerve cell and cognitive function in Alzheimer’s disease. This project will conduct a clinical trial to test whether treatment with rotigotine combined with cognitive behavioral therapy can reduce cocaine use in people with cocaine use disorder.

This project aims to develop a new way to stimulate the delta opioid receptor to treat withdrawal and abstinence from chronic opioid use. Withdrawal can cause pain, depression, and anxiety, which contribute to relapse. The research will test promising drug candidates in animal models with the intention of bringing at least one effective and safe compound to the final stage of drug development before human clinical trials can begin.