Funded Projects

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

This project proposes to develop novel Gpr151 antagonists to facilitate long-term abstinence in opioid-dependent individuals. Gpr151 is an orphan G-protein coupled receptor that is expressed almost exclusively in the medial habenula and co-localizes with ?-opioid receptors to regulate the inhibitory effects of opioids on habenular neurons. Mice with a null mutation in Gpr151 (Gpr151-/- mice) are resistant to the stimulant and rewarding effects of opioids and self-administer lower quantities of oxycodone. Based on this preliminary work, the study will seek to identify Gpr151 antagonists through a variety of methods and optimize them for potency, selectivity, drug metabolism, pharmacokinetics, and brain penetration properties. The study will evaluate effects of those with the most favorable drug-like physiochemical properties on electrophysiological responses of medial habenula to opioid drugs and assess the in vivo efficacy of these novel antagonists in wild-type and Gpr151-/- mice.

NOFO Title: Administrative Supplements to Existing NIH Grants and Cooperative Agreements (Parent Admin Supp Clinical Trial Optional)
NOFO Number: PA-18-591
Summary:

Neurostimulation techniques, such as transcranial direct current stimulation (tDCS), have been used as interventions for substance use disorders. This is a supplement to the currently NIDA-funded UG3 DA047793, “tDCS to Decrease Opioid Relapse,” which will measure behavioral and brain responses following tDCS stimulation delivered during tasks that use a particular brain network involved in cognitive control, and utilizing FMRI to assess the effects. This supplement allows the researchers to add an EEG measurement to the study, to get a complete picture of how tDCS might affect the function of key brain networks in ways that could be helpful for SUDs.

NOFO Title: Device-Based Treatments for Substance Use Disorders (UG3/UH3, Clinical Trial Optional)
NOFO Number: PAR-18-494

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

Although medications are available to treat opioid use disorder (OUD), adherence with treatment programs remains a problem. Nalmefene is an opioid receptor antagonist that was previously approved for treatment of opioid overdose–induced respiratory depression that has a longer duration of action than naloxone. AP007 is a unique formulation of nalmefene-loaded poly(lactic-co-glycolic acid) (PLGA) microparticles that when injected intramuscularly continually releases an effective dose of nalmefene and thus reduces opioid cravings in OUD patients. This group is developing AP007 and will have a lead formulation selected based on in vitro release kinetics data and in vivo pharmacokinetics data in rats. The objectives of the project are to determine safety and efficacy of AP007 in a swine opioid use/withdrawal model, preliminary safety in a first-in-human Phase 1 study, and preliminary efficacy in a Phase 2a multidose study. These results will be used to develop Phase 2 human and Phase 3 clinical studies.

NOFO Title: NIH Exploratory/Developmental Research Grant Program (Parent R21 Clinical Trial Required)
NOFO Number: PA-18-344
Summary:

Chronic pain is a significant public health problem associated with tremendous personal and economic burden. First-line treatment consists of opioid medications, but despite only moderate efficacy and unpleasant side effects, rates of opioid prescriptions have quadrupled over the past 15 years, and this has contributed to high rates of misuse, overdose, and mortality. Clearly, alternative, or non-opioid strategies for treating pain are needed. In this context, “opioid-sparing” medications refer to compounds that can be combined with and enhance the analgesic effects of lower-dose opioids without increasing the rewarding properties of either drug. There is preclinical evidence suggesting that cannabidiol (CBD) may have the potential to function as “opioid-sparing” medications, but its ability to alter opioid-mediated analgesia in humans has yet to be determined. This proposal will fill this gap by conducting a double-blind, placebo-controlled, within-subject randomized crossover study of the effects of CBD and morphine co-administration on pain sensitivity and subjective reinforcement on 28 healthy males and females. This is the first known study to investigate the ability of CBD to alter morphine’s analgesic effects in humans. If successful, the model will have a lasting impact on our ability to develop and test medications that reduce our reliance on chronic use of opioid medications for pain relief.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

There is a need for an opioid use disorder (OUD) treatment that can prevent relapse in detoxified subjects. Titan's proprietary subdermal implants can provide long-term, non-fluctuating therapeutic levels of drug continuously following a single office-based insertion procedure. The non-biodegradable solid matrix implant formulation virtually eliminates the risk of accidental drug dumping and associated serious toxicity, and its subdermal location assures patient compliance for the 6-month treatment duration. Nalmefene hydrochloride (nalmefene) is an opioid receptor antagonist approved for the management and reversal of opioid overdose. Prototype nalmefene implants inserted subdermally in rats delivered nalmefene continuously for months without any observable safety concerns. This proposed study will develop a 6-month implantable device that delivers nalmefene at a steady rate to prevent relapse to opioid dependence following opioid detoxification. This project will manufacture nalmefene implants, complete nonclinical safety and pharmacology studies, and conduct clinical studies in OUD subjects to support a New Drug Application.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

Kinoxis has developed a novel small-molecule lead, KNX100, that reduces the severity of opioid withdrawal symptoms in preclinical animal models of opioid use disorder (OUD). KNX100 was discovered from a phenotypic screen of compounds derived from a fragment-based drug discovery program targeting the brain oxytocin system. KNX100 has a favorable pharmacokinetic and safety profile and has undergone testing for efficacy signals in two rodents and two non-human primate species. The proposed activity is to progress the development of KNX100 to treat opioid withdrawal in OUD. The overall objective of the project is to establish the safety and tolerability of KNX100 to enable human efficacy testing to commence in patients requiring treatment for opioid withdrawal. The long-term objective for this development program is to generate human efficacy data to support KNX100 as a potential treatment for opioid withdrawal symptoms and ultimately enable a New Drug Application to the FDA.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

Buprenorphine (BUP) is an FDA-approved medication-assisted therapy (MAT) that improves outcomes and saves lives in patients with opioid use disorder (OUD). It is available in multiple dosage forms and routes of administration, including daily sublingual (SL) and buccal tablets and films, a monthly subcutaneous (SC) injectable, and a 6-month SC implant; however, these forms leave many patients untreated or undertreated. This product, in a partnership with Lyndra Therapeutics, aims to develop a once-weekly oral BUP dosage form for maintenance therapy for OUD, using a new oral dosage formulation developed by Lyndra. A long-acting oral BUP may address important limitations of current MATs by providing improved PK with less euphoria than SL, a patient- and provider-preferred route of administration, and an optimal dosing interval for improved patient adherence with the potential for cost-effective direct observed therapy.

NOFO Title: NIH Research Project Grant (Parent R01 Clinical Trial Not Allowed)
NOFO Number: PA-18-484
Summary:

Opioids remain the gold standard for treating moderate to severe pain, but their use is limited by numerous adverse effects, including tolerance, dependence, abuse, and overdose. Adverse effects could be avoided by combining an opioid with another drug, such that smaller doses of the opioid (in combination with another drug) produce the desired therapeutic effect. Direct-acting serotonin type 2 (5-HT2) receptor agonists interact in a synergistic manner with the opioid morphine to produce antinociceptive effects, suggesting a 5-HT2 receptor agonist could be combined with small amounts of an opioid to treat pain, thereby lowering the risk associated with larger doses. Unfortunately, very little is known about interactions between 5-HT2 receptor agonists and other opioids. The proposed studies will evaluate the therapeutic potential of mixtures of opioids and 5-HT2 receptor agonists using highly translatable and well-established procedures to characterize the antinociceptive, respiratory-depressant (overdose), positive-reinforcing (leading to misuse), and discriminative-stimulus (subjective) effects of drug mixtures as well as the impact of chronic treatment on the development of tolerance to and physical dependence on opioids. If successful, these studies will provide proof-of-concept for this innovative approach to pain treatment and evaluate the utility of targeting 5-HT receptors for analgesic drug development.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

Methadone maintenance therapy has been shown to facilitate recovery and prevent deaths from opioid use disorder (OUD). This proposal is for development of a once-weekly oral methadone for maintenance therapy for OUD. Lyndra has developed an oral gastric residence dosage form that has been demonstrated to provide at least seven days of continuous delivery. A once-weekly oral methadone product could lower a major barrier to treatment for many patients, reduce the stigma and socioeconomic impact of medication-assisted therapy, and increase the capacity of methadone treatment centers by reducing the number of patient visits. This study will perform pharmaceutical development and pharmacological characterization of a once-weekly oral methadone dosage form, leading to the selection of a clinical candidate for a first-in-human trial and submission of an IND. Clinical trials will then be performed to evaluate the safety and pharmacokinetics of the once-weekly oral methadone dosage form in subjects with OUD.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

There is an urgent need to prevent and reduce opioid use disorder (OUD) by reducing the need for opioid analgesia and preventing the escalation of opioid dosing in patients at greater risk of using more opioids following surgery. Brivoligide is a non-opioid drug candidate that can alter the course of postoperative pain for patients most likely to suffer increased pain and utilize more opioids following surgery. A single administration of brivoligide at the time of surgery can reduce acute postoperative pain in these patients by 30 percent to 40 percent beyond what can be achieved with the current standard of care for at least 28 days and reduce opioid utilization by 40 percent over a 3-month period following surgery. This project will support the research necessary to achieve regulatory approval of brivoligide with a broad indication, which will initially focus on the reduction of postoperative pain following mastectomy, a soft-tissue surgery model suitable to detect long-term pain and opioid reduction benefits. Brivoligide appears to be a very promising pharmacotherapy with the potential to greatly contribute to stemming the tide in the opioid crisis.

NOFO Title: Administrative Supplements to Existing NIH Grants and Cooperative Agreements (Parent Admin Supp Clinical Trial Optional)
NOFO Number: PA-18-591
Summary:

New medication treatment approaches are needed to help address the severe epidemic of opioid use disorder (OUD) and opioid overdose deaths in the U.S. Currently available medications, such as methadone, buprenorphine, and extended release injection naltrexone (XR-NTX; trade name: Vivitrol), are highly efficacious, but their effectiveness in practice is limited by poor adherence, with many patients stopping treatment prematurely and relapsing. The goal of this proposal is to develop an innovative long-acting subcutaneous implanted formulation of naltrexone, the O’Neil Long-Acting Naltrexone Implant (OLANI), toward FDA approval. Expected to produce naltrexone blood levels sufficient to block the effects of opioids for 6 months after implant, OLANI circumvents the need for adherence to monthly injections with XR-NTX and could represent an important new addition to the medical armamentarium for treatment of OUD.

NOFO Title: Development of Medications to Prevent and Treat Opioid Use Disorders and Overdose (UG3/UH3) (Clinical Trial Optional)
NOFO Number: RFA-DA-19-002
Summary:

There is a need for longer-acting prophylactic pharmacologic options for opioid use disorder (OUD) patients during maintenance therapy. This study tests a titanium implant loaded with a formulation of naltrexone and a naturally occurring carboxylic acid. The device is implanted subcutaneously with local anesthetic during an in-office procedure. The technology is based on a unique formulation that keeps the pH within the reservoir low and promotes passive diffusion of naltrexone. The benefits of the product include complete medication adherence for one year after administration, fewer relapses, smooth profile ensuring complete prophylaxis without sub-therapeutic plasma troughs, full reversibility, and similar efficacy with less drug exposure. This technology has been validated clinically with another drug and tested preclinically with naltrexone. This project will finalize the chemistry manufacturing and controls, produce IND supplies, conduct an IND-enabling safety study, and submit the IND.