Momentum is building at Jnana Therapeutics Inc. The firm has raised $107 million in a series C round and banked another $50 million up front from a new drug discovery and development pact with Roche Holding AG, which could potentially deliver significant near-term milestones and more than $2 billion in future milestone payments. It also commenced recruitment onto a first-in-human study of its lead drug candidate, JNT-517, an inhibitor of the phenylalanine transporter SLC6A19, which is in development for phenylketonuria.

Researchers have identified miR-124 signaling and its effects on AMPA receptor neurotransmission as a biological mechanism linking the shared risk scores of schizophrenia and bipolar disorders to their shared symptoms. The work, which appeared online in Neuron on Nov. 14, 2022, focused on schizophrenia and bipolar disorder, which are both highly heritable disorders that share substantial risk. Beyond their implications for those two specific disorders, the findings illustrate a path to connecting risk scores and behaviors via their biological link.

Neurons are specialized cells with a high metabolic demand to fulfill their function, survive or keep a healthy half-life. In this sense, the anabolism and catabolism of proteins and lipids could be associated to different neurodegenerative diseases. At the 2022 annual meeting of the Society for Neuroscience, scientists reported the latest discoveries on neuron metabolic needs at a session on 'Powering Thoughts: The Regulation of Neuronal Energy Metabolism and Mitochondria.'

Two phase III failures with Roche Holding AG subsidiary Genentech Inc.’s gantenerumab in staving off mild cognitive impairment tied to Alzheimer’s disease (AD) revealed the level of amyloid-beta removal was lower than the company expected. The protein amyloid beta accumulates in the brains of AD patients and its removal is suspected to be an eventual boon to AD patients. But there are still plenty of doubts. Top-line results from Genentech’s phase III Graduate I and II studies show gantenerumab, a fully human monoclonal IgG1 antibody, missed the primary endpoints of slowing clinical decline in those with mild cognitive impairment due to AD and mild AD dementia.

Ono Pharmaceutical Co. Ltd. has entered a worldwide drug discovery collaboration agreement with Captor Therapeutics SA to develop novel small-molecule degrader drugs against a currently undrugged target of interest in neurodegenerative diseases.

Stimulating the brain via implanted electrodes is used to treat both movement disorders such as Parkinson’s disease, and some psychiatric conditions such as obsessive compulsive disorder. But researchers are also working on ways to make such implanted electrodes listen instead of talk – and translate neuronal signals for people that have lost the ability speak, or the ability to move. At the Neurophysiology: Decoding and Neural Processing II session of the 2022 Annual Meeting of the Society for Neuroscience in San Diego, researchers from the Wyss Center for Bio and Neuroengineering (Switzerland) presented a device implanted in the brain that allowed restoration of movement and speech.

One way psychiatric disorders differ from neurological disorders is by the absence of anatomically defined neuropathology. “Alzheimer's disease, Parkinson's disease or stroke have a very clear picture of what cells are changing and how they're changing. The specific changes are very clear under a microscope, but in psychiatric diseases one hasn't been able to see that,” Daniel Geschwind told BioWorld.