The acquisition of Karuna Therapeutics Inc. by Bristol Myers Squibb Co. (BMS) was announced in December 2023, and closed as the BioEurope Spring meeting was convening in March. Along with the acquisition of Cerevel Therapeutics Inc. by Abbvie Inc., the deal signaled that big pharma companies were ready to get back into the brain diseases space.
Seaport Therapeutics Inc. has followed up its recent fundraiser with an oversubscribed $225 million series B financing that will help set it on the path to a phase IIb study in major depressive disorder. The company’s lead candidate is allopregnanolone, an endogenous neurosteroid that is taken orally and bypasses the liver. Once it is absorbed through the lymphatic system, allopregnanolone enters through a pathway that avoids the liver and the possibility of hepatoxicity and elevated liver enzyme counts, Michael Chen, Seaport’s chief scientific officer, told BioWorld.
The FDA has approved Cobenfy, a dual M1/M4 muscarinic agonist that offers a fundamentally different approach to treating schizophrenia. The fixed dose combination of xanomeline-trospium is the first to act via a novel mechanism for the serious psychiatric disorder in over 50 years, finally expanding the treatment options beyond dopamine-targeted therapies. Bristol Myers Squibb Co., which acquired Cobenfy developer Karuna Therapeutics Inc. for $14 billion in a deal that closed in March 2024, said the drug will be available in the U.S. from late October.
Nine years on from securing $3.84 million for a phase I clinical trial to test the formulation, with results showing it overcame side effects that had confounded its forerunner, the schizophrenia treatment Karxt met its PDUFA date Sept. 26 with no decision by midday. If approved, the fixed combination of xanomeline-trospium will be the first in a new drug class, and as a dual M1/M4 muscarinic agonist, the first new therapy to act via a novel mechanism for the serious psychiatric disorder in over 50 years.
Work at Karuna Therapeutics Inc. has led to the identification of substituted tetrahydropyrrolo-pyridinone compounds acting as muscarinic M4 receptor agonists and/or positive allosteric modulators.
Preclinical data of rabbits having convulsions has prompted the U.S. FDA to place a clinical hold on Neumora Therapeutics Inc.’s phase I study of NMRA-266 in healthy adults. Neumora said about 30 participants had been dosed so far in the single ascending and multiple ascending dose study, with no evidence of convulsions seen.
Adam Lenkowsky, chief commercial officer for Bristol Myers Squibb Co. (BMS), said his firm plans to launch Karxt (xanomeline-trospium) in the U.S. as soon as it’s approved by the U.S. FDA, and “expect[s] to accumulate sales in early 2025.” BMS tied a bow on the year by disclosing its plan to pay $330 per share to take over Karuna Therapeutics Inc. in a deal valued at $14 billion to bring aboard Karxt, which acts as a dual M1/M4 muscarinic acetylcholine receptor agonist. The FDA has assigned Sept. 26, 2024, as the PDUFA date for Karxt as a new treatment for schizophrenia in adults.
The pivotal phase III study of brilaroxazine from Reviva Pharmaceuticals Holdings Inc. for adults with schizophrenia hit its primary endpoint and two key secondary endpoints, following positive phase II data in 2021. The serotonin-dopamine signaling modulator, the company’s lead candidate, is a once-daily treatment. Results from the study showed brilaroxazine demonstrated reductions in all major symptom domains for the patients and the secondary endpoints at week 4 when comparing the 50-mg dose with placebo.
In a race with Karuna Therapeutics Inc. to get its schizophrenia drug to market, Cerevel Therapeutics Holdings Inc. has priced an underwritten public offering at $22.81 per share. The offering is worth of about $450 million, with the company estimating sales of the 19.7 million shares will yield net proceeds of about $433.6 million.
Just days after Karuna Therapeutics Inc. reported positive data from a third registrational trial of Karxt (xanomeline plus trospium) in schizophrenia, Puretech Health plc sold a portion of its royalty in Karxt in a potential $500 million agreement with Royalty Pharma. Puretech was a founder of Karuna and co-inventor of Karxt, an oral M1/M4-preferring muscarinic agonist.
