Funded Projects

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.

This research project will investigate the cannabinoid receptor 2 protein (CB2R) as a novel therapeutic target for opioid-induced respiratory depression caused by fentanyl, oxycodone, and heroin. This study will shed light on how the endocannabinoid system in the brainstem works to control breathing under normal conditions and during opioid-induced respiratory depression. The research aims to determine whether activation of the CB2R with a brain-penetrant CB2R-binding molecule is safe and clinically useful for treating opioid overdose prevention and reversal. This research will pave the way for discovering new medications that activate CB2R to reduce opioid-related deaths.

Naltrexone (NTX) has been proven as an important, safe, and effective therapy in helping patients overcome opioid addition and in preventing overdose. Unfortunately, the therapeutic potential of NTX has been blunted by poor adherence. To combat this issue, a system must be developed to deliver NTX for longer durations than are currently available with a more patient-friendly format. The goal of this research is to optimize and scale up our laboratory PLGA-based microparticle formulations of NTX delivery (either 2 months or 7–10 days) and bridge it to a Phase 1 clinical trial. This innovation will result in a more patient-friendly format consisting of less painful injections and improved release kinetics. PLGA-based drug delivery systems have been used successfully in a number of small-molecule products and are the most widely utilized and studied biocompatible polymer systems in controlled release. Thus, the regulatory and development hurdles with the FDA will be lower than with other novel excipients or technologies. The significance of this research and product development is that the final outcome of this project will ultimately provide a new, readily viable, essential tool to help patients overcome opioid dependence.

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.

Currently no medications are approved by the U.S. Food and Drug Administration for psychostimulant (cocaine and methamphetamine) use disorder. This project will develop a novel opioid molecule (PPL-138) that blocks cocaine and methamphetamine self-administration in animal models and that lacks rewarding properties that could lead to addiction. This research will conduct manufacturing and safety studies to prepare for Phase 1 clinical trials to determine safety in human patients.