A Depression Trial Pause, Polar Ice Loss and an AI-Agent Breach

This briefing covers a pause in late-stage azetukalner depression trials, a reconciled satellite record of Greenland and Antarctic ice loss, Spain's first reported AI-agent data breach, and human cortical organoids growing through much of the available cortex in specially engineered mice.

Stories in this briefing

1. Azetukalner Depression Trials Pause New Enrollment

   Xenon Pharmaceuticals has paused new enrollment in Phase III azetukalner studies for major and bipolar depression after neuropsychiatric adverse events emerged. Current participants continue while the company considers dose changes. Executives described brief confusion, speech difficulty, impaired coordination and a small number of events grouped as psychosis, but complete rates and comparisons with placebo remain unpublished. The action does not affect the drug's epilepsy programme, and public evidence does not establish that azetukalner caused every event.

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2. Faster Glaciers Dominate Decades of Polar Ice Loss

   A reconciled record built from 42 estimates across 27 satellite missions finds Greenland and Antarctica lost 11.309 trillion tonnes of ice between 1979 and 2023. Faster glacier discharge produced 84% of the combined loss and contributed to 31.4 millimetres of sea-level rise. Loss rates accelerated after the 1990s, despite a temporary slowdown after 2020. This reconstruction measures past change, not future sea-level rise, and uncertainty remains greatest in parts of East Antarctica.

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3. Spain Reviews a Reported AI-Agent Data Breach

   Spain's privacy regulator received the country's first breach notification alleging that an AI agent used valid credentials, searched for vulnerabilities, changed personal data and viewed invoices. The report suggests one system may have linked several attack stages, shortening defenders' response time. But it is not a completed investigation. The organization, model, provider, affected population and forensic logs remain undisclosed, and authorities have not determined how much human prompting or supervision occurred.

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4. Human Brain Organoids Expand Through Engineered Mouse Cortex

   Human cortical organoids occupied 91.9% of the combined cortical tissue volume measured in seven specially engineered mice three months after transplantation. The grafts developed blood supply, neural activity and connections across the host nervous system, offering a way to study human development and injury inside a living body. The tissue remained immature and artificially organized, however. The mice retained a predominantly mouse nervous system, and the experiment demonstrated neither human-like cognition nor a treatment for replacing damaged cortex.

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