DEMONSTRATED LEADER IN THE DISCOVERY AND DEVELOPMENT OF MELANOCORTIN AGONIST TREATMENTS
We’ve only just started tapping the utility of melanocortin pathways in treating patients after establishing ourselves with Vyleesi® (bremelanotide injection) for the treatment of hypoactive sexual desire disorder in premenopausal women, as the first FDA-approved melanocortin agent. We’re focused on amplifying its commercial platform in North America, supporting commercialization partners globally, and subsequently re-licensing to committed partners in the US and worldwide.
Our development arm builds on our proven success in bringing a melanocortin therapeutic from the lab to market by using our experience to propel our programs in ocular and autoimmune diseases through our clinical pipeline.
Melanocortin Receptor Programs
Vyleesi® MC4r Agonist
PL9643 MCR Agonist
PL9643 MCR Agonist
PL8177 MCR1 Agonist (Oral)
NATRIURETIC PEPTIDE RECEPTOR PROGRAMS
PL5028 NPR-A/C Agonist
PIONEERING A NEW TREATMENT PARADIGM
FOR OCULAR DISEASES
The need for innovative treatments for ocular indications remains unmet. Specifically, dry eye disease (DED) is a chronic, painful, and debilitating inflammatory eye condition that causes irritation, redness, discharge, and blurred vision. Over 20 million people in the US are estimated to be living with DED.
Palatin is developing a truly novel class of drugs that selectively bind to melanocortin receptors (MCR), with both MCR1 and pan-agonists, to directly activate natural pathways that resolve disease inflammation in the eye. Melanocortin agonists provide potential advantages over current options to better meet the needs of patients and clinicians by directly addressing harmful inflammation, resulting in rapid, global improvement of affected tissues.
Our PL9643 ophthalmic solution (topical eye drops) is advancing into late-stage clinical studies. Our phase 2 study demonstrated improvements in both the signs and symptoms of DED after just 2 weeks of treatment, with no safety signals and excellent tolerability.
Additional melanocortin receptor agonists are under investigation to resolve other inflammatory ocular diseases, including non-infectious uveitis, diabetic retinopathy, and diabetic macular edema.
ADVANCING A NOVEL APPROACH TO TREATING AUTOIMMUNE DISEASES
There’s incredible potential to address the underlying inflammation in autoimmune diseases that physicians commonly treat with broad immunosuppressants that increase the risk of complications. The presence of high MCR1 levels in the gut makes ulcerative colitis (UC) a target for melanocortin receptor agonist therapy. This will benefit the nearly 1 million people in the US who suffer from an autoimmune disease that manifests as chronic inflammation of the colon.
Our oral MCR1 agonist (PL8177) was developed to resolve inflammation directly in the colon, avoiding broad immunosuppression and adverse effects with our potent, selective compound. This delayed-release, oral formulation is designed to deliver drug to diseased bowel, maximizing local treatment while avoiding systemic adverse effects.
Two phase 1 studies have produced promising results. The first demonstrated significant safety and tolerability of PL8177; the second highlighted the value of an oral, delayed-release polymer formulation that can achieve local release without systemic absorption. We’ve scheduled a phase 2 trial in UC for the second half of 2021.