only tested on mice, but still interesting as a starting point to see how gut and brain might be interconnected.
http://www.neuroscientistnews.com/r...lora-keeps-mind-sharp-some-help-immune-system
http://www.neuroscientistnews.com/r...lora-keeps-mind-sharp-some-help-immune-system
As well as impaired neurogenesis, the researchers also found that the population of a specific immune cell in the brain—the Ly6C(hi) monocytes—decreased significantly when the microbiota was switched off.
Could these immune cells be a previously unknown intermediary between the two organ systems? Wolf and her team tested and confirmed this hypothesis: when they removed just these cells from the mice, neurogenesis declined and when they gave the cells to the mice that had been on antibiotics, neurogenesis increased once again.