Do you know: Scientists reveal a hidden role of gut microbes in anxiety: could probiotics be the first mental health progress?
Could the key to alleviate anxiety in our ngut? Scientists from the Duke-Nus Medical School and the National Neurology Institute have found a vital connection between stomach microbes and anxiety-related behavior. Their research, published today in Embo molecular medicineIt recommends that microbial metabolites have a direct role to play in regulating brain activity linked to anxiety. This result opens exciting possibilities for newly-established probiotic therapies to improve mental health.
The prevalence of mental health disorders has been rising over the years. According to the latest Nationwide Study, 1 in 7 people in Singapore have a mental health disorder, including depression disorders and anxiety[1]. In 2019, mental health disorders were one of the four main causes of disease burden in Singapore[2].
Therefore, the research team aimed at investigating the role of a microbe in anxious behavior. In pre -clinical studies, the scientists noticed in a germ -free environment, those who were not exposed to living microbes, with much more concern than those with typical residential living microbes.
Further investigation showed that the increased concern was associated with increased activity in a brain region that was associated with feelings such as fear and anxiety, the basolateral amygdala (BLA). This was further recognized that it was associated with specialized proteins within brain cells called the SK2 channels that are dependent on calcium, involving anxiety behavior. In conditions when the body and brain are exposed to live microbe metabolites, the SK2 routes act as a crush, which prevents neurons being too scheduled and shot too often.
Associate Professor Shawn Je explained from Duke-Nus’s behavioral program and one of the main authors:
“Our results show the specific and complex neural process that connects microbes with mental health. The people showed no living microbes higher levels of anxious behavior than those with living bacteria. Essentially, the lack of these microbes affected the way in which the brain, especially in areas that control fear and anxiety, leading to anxious behavior. “
To better understand the role of microbes in this process, the researchers introduced a living microbe in germ -free mice[3]. This reduced the raised neuronal activity in the basolateral amygdala and thus SK2 channel activity. As a result, the mice showed much less anxious behavior to their emotional answers like those who were exposed to microbes.
The researchers also tried treatment with indoles, microbial metabolites that produce certain microbes. When indoles were given to the germ -free mice, they showed reduced activity in the basolateral amygdala and showed less concern behavior. This showed that our native microbes produce metabolites, which suggest that there is a direct link between our microbiot and keeps a mental balance.
Professor Sven Pettersson of the Department of Research, Singapore National Institute of Neuroscience, which is also the main author of the study: said:
“Evolutionary protection mechanism is to establish hunger signs and control hunger. Therefore, it can be viewed as the first major wave of anxiety exposure to the newborn, simply says,” If you do not eat, You will die. We report a similar mechanism in which indoles can regulate levels of anxiety in mammals.
The implications of these observations are multiple: for example, it opens to the therapeutic potential of focusing on the gut-brain axis to anxiety-related disorders. “In other words, it opens for customized therapies according to the 21st century precision medicine. Studies like this show the close inheritance relationship between our native microbes and higher complexity of life,” Pettersson ends.
Professor Patrick Tan, Deputy Vice-Old Senior Research at Duke-Nus said:
“Our results emphasize the deep evolutionary links between microbes, nutrition and brain function. Just in the brain-it is also in the stomach. “
The team now hopes to explore clinical trials to find out whether probiotics or indole-based supplements can be effectively used in humans as a natural concern treatment. If successful, this could begin a new era in mental health care – one where microbes help to keep our mind at ease.
[1] Institute of Mental Health, Singapore Mental Health Study
[2] The Ministry of Health 28 October 2020 Results of World Disease Study 2019 Study Results https://www.moh.gov.sg/news-highlights/details/global-burden- Findings-Disease-2019-Findings Findings
[3] The study was carried out in accordance with the National Advisory Committee on Laboratory Animal Research Committee (NACARR).
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