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Chinese researchers say this molecule might one day deliver the ‘perfect’ drug for depression

  • Scientists pinpoint biological pathway used by a common antidepressant and learn how to eliminate its notorious side effects
  • Research could revolutionise drug treatment by neutralising hallucinations, addiction risks

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Esketamine, a common drug to treat depression, can have serious side effects. Scientists in Shanghai say their discovery can lead to a better treatment. Photo: Shutterstock
Dannie Peng
In the long-standing quest to improve treatments and outcomes for hundreds of millions of people worldwide who suffer from depression, scientists in China have claimed a discovery they say has the potential to deliver the “perfect” medication.

The team, from the Interdisciplinary Research Centre on Biology and Chemistry at the Chinese Academy of Sciences, said it found a way to eliminate the drawbacks of esketamine – an approved but controversial antidepressant – by pinpointing its previously unknown working mechanism, according to a study published in Nature Neuroscience last week.

“Esketamine is the only fast-acting medication on the market that fights depression, but its fundamentals are vague. Now with our latest finding, we can make improvements and develop a better drug,” Chen Yelin, lead scientist of the study, told the South China Morning Post.

“This is important work that provides many new insights into the mechanisms of fast-acting antidepressants. These findings are likely to have a major impact on the development of novel therapeutic agents that can elicit fast antidepressant responses without psychomimetic effects,” the paper’s reviewers said.

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Esketamine, and its chemical variant ketamine – a powerful anaesthetics that has been used since the 1970s, and is also used as a recreational drug – have well-known antidepressant properties.

But esketamine – now a common prescription drug – has notorious side effects that include hallucinations and addiction.

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While the rates of depression globally have been on the rise, the Covid-19 pandemic made the situation much worse. In the first year of the global health crisis, the prevalence of anxiety and depression worldwide soared 25 per cent, according to the World Health Organization (WHO).
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