Chemistry:BI 425809
BI 425809 is an investigational nootropic to enhance the cognition and functional capacity in schizophrenia developed by Boehringer Ingelheim. As of May 2020, it is in phase III of clinical trial under the code name CONNEX-3.[1] BI 425809 is an inhibitor of glycine transporter 1 (Gly-T1) that in phase II improved cognition after 12 weeks in patients with schizophrenia. Doses of 10 mg and 25 mg showed the largest separation from placebo. If these encouraging results are confirmed in phase 3 trials, BI 425809 could provide an effective treatment for cognitive impairment associated with schizophrenia.[2] Schizophrenia is characterized by abnormalities in glutamatergic pathways related to NMDA receptor hypofunction. Inhibition of GlyT1 on the presynaptic membrane or astrocytes is hypothesized to increase glycine levels within the synapse. The NMDA receptor function may be enhanced by increasing levels of its co-agonist, glycine, within the synaptic cleft, which may lead to improvements in cognitive function.[3]
References
- ↑ Clinical trial number NCT04860830 for "A Phase III Randomized, Double-blind, Placebo-controlled Parallel Group Trial to Examine the Efficacy and Safety of BI 425809 Once Daily Over 26 Week Treatment Period in Patients With Schizophrenia (CONNEX-3)" at ClinicalTrials.gov
- ↑ "Efficacy and safety of the novel glycine transporter inhibitor BI 425809 once daily in patients with schizophrenia: a double-blind, randomised, placebo-controlled phase 2 study" (in English). The Lancet. Psychiatry 8 (3): 191–201. March 2021. doi:10.1016/S2215-0366(20)30513-7. PMID 33610228.
- ↑ "Evaluation of Pharmacokinetics and Pharmacodynamics of BI 425809, a Novel GlyT1 Inhibitor: Translational Studies". Clinical and Translational Science 11 (6): 616–623. November 2018. doi:10.1111/cts.12578. PMID 30136756.
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