Renal Sparing COX-2 Inhibitors for the Treatment of Inflammation and Acute Pain
GIBH-1014 is a new class of COX-2 selective inhibitor (CSI) that could fulfill an unmet medical need in inflammation and pain. Compound 1014, contains a chromene pharmacophore and possesses distinct physicochemical properties (i.e. non-sulfonamide, low molecular weight acid, appreciable aqueous solubility, and facile synthesis). Drug 1014 has unique intrinsic ADME properties, especially a relatively low volume of distribution resulting in higher concentrations of drug at sites of inflammation.
Indication and Market
There are about 53 million surgeries performed in the United States each year that require drugs for post-operative pain, and over half of these patients still experience inadequate pain relief. The treatment of moderate to severe acute pain is dominated by opioids. While they offer excellent pain relief, they come with undesirable side effects and abuse potential. The future market is highly receptive to better tolerated analgesics with opioid-sparing effects. The post-operative pain market is growing steadily and is expected to exceed $6.5 billion in the U.S, E.U. and Japan by 2018.
Acute Pain: Celecoxib is the only CSI available in the United States and, thus, there is an unmet need for a novel and safer CSI that would confer improved efficacy in acute pain. GIBH-1014 provides the opportunity to fulfill this unmet need. In pre-clinical rodent models, compound 1014 conferred anti-inflammatory efficacy comparable to celecoxib, but conferred superior efficacy in reducing acute pain (hyperalgesia). Another unique property of 1014 compared with NSAIDs and coxibs is its mitigated effect at therapeutic doses on lowering renal blood flow in volume-depleted animals. A superior renal profile would differentiate 1014 from other CSIs and provide a huge market potential in chronic use indications, notably in patients with compromised renal function.
Cancer: Many studies have shown the efficacy of CSIs in animal models of cancer prevention. Mechanistically, COX-2 has been shown to be very important in all stages of oncogenesis. A case in point is that the FDA approved celebrex for use in patients with familial adenomatous polyposis (FAP). Also, many studies have shown the efficacy of CSIs in animal models of cancer treatment. COX-2 is highly expressed in tumor and stromal cells and PGE2, a major product of COX-2-mediated arachidonic acid metabolism, is a contributing component of angiogenesis. GIBH-1014 is currently being evaluated in animal models of cancer prevention and treatment.
Compound 1014, was shown to be potent, efficacious, and selective both in vitro and in vivo. Drug 1014 is active against recombinant COX-2 (IC50 14 nM), but inactive against the COX-1 enzyme (IC50 >100 uM). The drug was shown to be efficacious in the rat carrageenan air pouch model (ED50 = 0.34 mg/kg), the rat carrageenan footpad edema model (ED50 = 3.0 mg/kg), rat hyperalgesia model (ED50 = 2.2 mg/kg) and the adjuvant arthritis model (ED50 = 0.4 mg/kg). The compound has a high degree of aqueous solubility, which affords the potential for parenteral formulation.
GIBH has filed intellectual property rights for composition of matter, production and medical use of compound 1014 for the treatment of acute and chronic pain as well as various cancers including lung, colon and pancreatic tumors. Patents include 201210202059.X, 201210468591.6, 201210525326.7 and 201210528349.3.
GIBH-1014 is a low molecular weight (340 daltons), water soluble, S-isomer, benzopyran chromene carboxylate.
Primary: Acute Pain
Secondary: Lung Cancer and Chronic Pain (if renal sparing in humans)
Compound 1014, is being formulated as a tablet suitable for oral dosing.
Lead optimization: Preclinical proof-of-concept in industry-standard models of acute pain and inflammation established. Candidate selection of the drug is scheduled for late 2013 and IND filing is to be initiated in 2014 for acute post-operative pain.
Commercial partners are being sought for development and marketing in the EU and North America.