KM-391 was under development by Cellceutix Corporation (now Innovation Pharmaceuticals).[1][2] It remained under development as late as 2012 and reached the preclinical research stage of development for autism.[1][2] However, its development was eventually suspended.[1]
^ abcdefWebb S (August 2010). "Drugmakers dance with autism". Nat Biotechnol. 28 (8): 772–774. doi:10.1038/nbt0810-772. PMID20697394. Cellceutix, a biotech company in Beverly, Massachusetts, is also testing a preclinical compound for autism, KM-391, in a rodent model of autism developed by researchers at the Kennedy Krieger Institute in Baltimore. The autism-like symptoms are induced by injecting the chemical 5,7-dihydroxytryptamine (5,7-DHT) into the forebrain of newborn rat pups, leading to neonatal serotonin depletion, reduced brain plasticity and abnormal behaviors. In an initial study, KM-391 given over 90 days restored normal behaviors, and near-normal serotonin levels and increased brain plasticity relative to a nontreatment group and a group given Prozac. Another study measuring serotonin levels in three regions of the rat brain has confirmed the restoration of normal serotonin levels. Another small study added an oxytocin antagonist to the mix. The antagonist alone intensified the autism-related behaviors, such as repetitive behaviors and sensitivity to touch, but when given with KM-391, the frequency and intensity of these behaviors were reduced.
^Kumar B, Prakash A, Sewal RK, Medhi B, Modi M (2012). "Drug therapy in autism: a present and future perspective". Pharmacol Rep. 64 (6): 1291–1304. doi:10.1016/s1734-1140(12)70927-1. PMID23406740. Tab. 3. Drugs under different phases of development #: [...] [Drug:] KM 391: Action: Acts on serotonin uptake. Developmental stage: Preclinical stage. [...] # Source: http://clinicaltrials.gov/
^Majhi S, Kumar S, Singh L (2023). "A Review on Autism Spectrum Disorder: Pathogenesis, Biomarkers, Pharmacological and Non-Pharmacological Interventions". CNS Neurol Disord Drug Targets. 22 (5): 659–677. doi:10.2174/1871527321666220428134802. PMID36915952.