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Brainstem Opioid Receptors Act as a Brake on Chronic Pain

August 17, 2026

a schematic of the brain and a microscope image of cells in a region of the brainChao-Cheng Kuo

A cluster of nerve cells (cyan, right) in the mouse brain (cyan, left) play a role in both pain relief and the generation of chronic pain. WashU Medicine researchers found that certain receptors on the surface of these cells can shut off chronic pain.

Source: The Scientist

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About WashU Medicine

WashU Medicine is a global leader in academic medicine, including biomedical research, patient care and educational programs with 3,100 faculty. Its National Institutes of Health (NIH) research funding portfolio is the second largest among U.S. medical schools and has grown 78% since 2016. Together with institutional investment, WashU Medicine commits over $1.6 billion annually to basic and clinical research innovation and training. Its faculty practice is consistently among the top five in the country, with more than 2,550 faculty physicians practicing at 200 locations. WashU Medicine physicians exclusively staff Barnes-Jewish and St. Louis Children’s hospitals — the academic hospitals of BJC HealthCare — and Siteman Cancer Center, a partnership between BJC HealthCare and WashU Medicine and the only National Cancer Institute-designated comprehensive cancer center in Missouri and southern Illinois. WashU Medicine physicians also treat patients at BJC’s community hospitals in our region. With a storied history in MD/PhD training, WashU Medicine recently dedicated $100 million to scholarships and curriculum renewal for its medical students, and is home to top-notch training programs in every medical subspecialty as well as physical therapy, occupational therapy, and audiology and communications sciences.

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