We all experience anxiety to one degree or another, whether it's a job interview or a first date.. The authors of a new study believe that when it comes to anxiety, “good” bacteria can play a key role.. The results of scientific work are published in the journal Microbiome.

Introduction Researchers found that the absence of good bacteria in mice altered miRNA expression in brain regions that play a role in anxiety and depression, according to Pannochka, an online publication for girls and women aged 14 to 35.. net This is the first study to suggest a link between good bacteria and anxiety.. But what are the mechanisms behind the link between good bacteria and anxiety New research by Dr. Gerard Clarke helps shed light on this.

To achieve results, scientists studied mice without microorganisms. These mice were then colonized with good bacteria and placed under normal conditions..

The researchers note that mice exposed to sterile conditions are more likely to develop symptoms of anxiety, depression, sociability problems and cognitive dysfunctions.. Scientists find lack of good bacteria affects microRNAs in rodent brains. MicroRNAs are tiny RNA molecules that regulate gene expression..

Compared to normal mice, sterile mice had differences in 103 miRNAs in the amygdala (a brain region involved in emotional processing) and 31 microRNA changes in the prefrontal cortex (a brain region that influences behavior, planning, and impulse control).

Importantly, when the researchers injected bacteria into sterile mice later in life, some miRNA differences in the amygdala and prefrontal cortex disappeared..

Thus, scientists suggest that a good microbiome is required for the normal regulation of miRNAs..

“Good microbes seem to influence microRNAs in the amygdala and prefrontal cortex,” says Dr. Clarke.. “This is important because these miRNAs can influence physiological processes that are fundamental to the functioning of the central nervous system and the brain.”.

In addition, scientists examined the brains of adult rats whose bacteria were weakened by antibiotics.. They found that the miRNAs of these rats were similar to sterile mice.. More research is needed before scientists can draw any definitive conclusions about the link between good bacteria and anxiety.. However, researchers believe they have potential treatments for anxiety disorders..

Another study finds gut bacteria may prevent cancer.

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