Funded Projects

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.

Cholecystokinin B receptor (CCKBR) is a molecule found in the brain that helps regulate anxiety and depression but also influences the development of tolerance to opioids. CCKBR levels are also increased in models of nerve injury-induced (neuropathic) pain. Therefore, targeting CCKBR may offer a new approach to treating neuropathic pain and the associated anxiety and depression. Researchers have developed mouse antibodies that can inactivate CCKBR. However, to be usable in humans without causing an immune response, these antibodies need to be modified to include more human sequences. This project will use a fragment of the CCKBR antibody, modify it with the addition of human antibody sequences, and then select the clones that bind most strongly and specifically to human CCKBR. These will then be tested in cell and animal models of neuropathic pain to identify the most promising candidates for further evaluation in humans.

Opioid use disorder (OUD) is a significant public health problem in the United States. Particularly troubling is the rapid evolution of an opioid epidemic within the past decade, characterized by a surge in unintentional overdose deaths involving synthetic opioids, such as fentanyl. The current standard of care for opioid overdose is reversal with opioid antagonist naloxone. Naloxone is effective at reversing overdose from prescription opioids and heroin, but less effective when combating fentanyl, due to fentanyl?s high potency. Therapeutic monoclonal antibodies (mAbs) against fentanyl could overcome this problem by specifically preventing the drug from entering the central nervous system, averting overdose and attenuating opioid-induced respiratory depression. This study will develop and design of laboratory protocols needed to establish a Good Manufacturing Practice (GMP) process, quality assurance protocol, and stability profile for a new human mAb against fentanyl. Subsequent production of current GMP material will enable Good Laboratory Practice (GLP) toxicology studies in rats and dogs and eventually a Phase I/IIa clinical trial. This material will also be used in final opioid-induced respiratory depression studies in mice and non-human primates to confirm therapeutic efficacy of final drug product. If successful, these activities will enable filing for an investigational new drug application for this mAb candidate with the FDA.

This project seeks to develop a first-in-class (FIC), peripherally restricted and long-acting drug with potential to reduce or replace opioid for moderate to severe pain, and that will be non-addictive, safe, and convenient to use. The program is based on strong scientific evidence showing that activation of a receptor called MAS1 produces opioid-independent and peripheral pain relieving activity in a wide range of animal models of chronic pain, including inflammatory, neuropathic, and bone cancer pain. This project focuses on the development of potent, stable, and specific molecules that stimulate MAS1. Researchers will then attach peptides that stimulate MAS to antibody carriers that make them last longer and selectively affect only the peripheral nervous system, which could allow for once a week or twice a month dosing while maintaining the drug’s efficacy and reducing potential side effects, and test the resulting molecule in animal models.

The proposed SBIR Phase II program seeks to select a first-in-class, peripherally-restricted, and long-acting somatostatin receptor 4 (LA-SSTR4) agonist clinical candidate for development as a novel non-addictive analgesic able to replace opioids for the treatment of moderate-to-severe chronic pain. The program is based on strong scientific evidence showing that activation of peripheral SSTR4 produces broad spectrum analgesic activity and pursues a unique therapeutic strategy.   Unlike opioids, SSTR4 agonists do not induce constipation, respiratory depression, dependence, addiction, or abuse. Finally, unlike SSTR2 and SSTR5, SSTR4 expression in the pituitary and pancreas is very low, supporting that selective SSTR4 agonists are unlikely to perturb peripheral endocrine functions. The preceding SBIR Phase I program has already established the feasibility of conjugating a short-acting, potent, and selective peptide SSTR4 agonist to the antibody carrier. The resulting LA-SSTR4 agonist lead series has high agonist potency and selectivity for SSTR4 and has demonstrated antinociceptive activity in an animal pain model. The proposed SBIR Phase II program seeks to: optimize the existing lead series and select a clinical candidate for development,  validate and prioritize the indication(s) for clinical development using disease-relevant mouse pain models, and characterize the pharmacokinetics and safety/toxicology profile of the clinical candidate in rat and non-human primates to help design subsequent investigational new drug (IND)-enabling studies.