Chinese scientists have discovered "itch" neurons in the brain or may help treat chronic itchy disease
December 19, 2018 Source: Xinhua Author: WANG Lin-lin
Window._bd_share_config={ "common":{ "bdSnsKey":{ },"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":" 0","bdSize":"16"},"share":{ }};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')) .src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];Patients with chronic itching often have uncontrollable excessive scratching behavior due to itching, which seriously damages the skin and affects the quality of life. Recently, Sun Yangang, a team of the Institute of Neuroscience of the Chinese Academy of Sciences, discovered a group of special “itch†neurons in the brain of mice. Once activated, it causes itching. Industry experts believe that this potential target is expected to treat chronic itchy disease. The results were published on the 14th in the well-known academic journal Neuron.
Itching is the same as visual, auditory and other perceptions, and is also the product of brain processing. Itching is an important protective mechanism for animals. Itching can cause scratching, while scratching can remove potentially harmful foreign objects on the skin. Therefore, itch is important for the survival of animals.
At present, human understanding of the mechanism of itch information processing is still very limited, and there is a temporary lack of effective treatment for chronic itch disease. Therefore, studying the neural mechanisms of itch information processing will help develop new therapies for the treatment of chronic itch disease. For the study of itch, the molecular and cellular mechanisms of itch in the skin, sensory neurons and spinal cord have been studied before, and there are few studies on how the brain processes itch and how to dynamically regulate itch.
Sun Yangang's research group used mice as the research object, and found that there is a special type of excitatory neurons in the gray matter around the midbrain aqueduct, killing or inhibiting this group of neurons, can significantly reduce the itch-induced scratching behavior. Conversely, activation of this group of neurons can induce strong scratching behavior in the absence of peripheral itch irritation.
Industry experts believe that the study reveals the cells and loop mechanisms that regulate itch information processing in the midbrain region, and a group of specific neurons in the brain region are critical for the production of the “itch-scratch†vicious circle during itching. This is expected to change the current thinking of solving the chronic itching problem. This study suggests that our future intervention in neurons responsible for itch information processing in the brain may be a new method for treating chronic itchy disease.
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