A Link Between Gut Bacteria and Neurogenesis: Mouse Study

Nisarg Joshi

Brain, GUT, Microbes

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I shared here many times that प्राण is cellular intelligence and memory. Mar the प्राण, do not retain प्राण and your body cells lose intelligence.

Lost cellular intelligence = Zombie cells = Prone to proliferation, inflammation, retard responses.

Here is the paper in support of this observation.

antibiotics = lack of prana = brain development hampered = memory function impaired.


Research


A Link Between Gut Bacteria and Neurogenesis: Mouse Study

Summary: According to a new mouse study, antibotics that are strong enough to kill gut bacteria can also halt the growth of hippocampal neurons.

Source: Cell Press.

http://neurosciencenews.com/neurogenesis-gut-bacteria-4253/

http://www.cell.com/cell-reports/pdf/S2211-1247(16)30518-6.pdf

Antibiotics strong enough to kill off gut bacteria can also stop the growth of new brain cells in the hippocampus, a section of the brain associated with memory, reports a study in mice published May 19 in Cell Reports. Researchers also uncovered a clue to why– a type of white blood cell seems to act as a communicator between the brain, the immune system, and the gut.

“We found prolonged antibiotic treatment might impact brain function,” says senior author Susanne Asu Wolf of the Max-Delbrueck-Center for Molecular Medicine in Berlin, Germany. “But probiotics and exercise can balance brain plasticity and should be considered as a real treatment option.”

Wolf first saw clues that the immune system could influence the health and growth of brain cells through research into T cells nearly 10 years ago. But there were few studies that found a link from the brain to the immune system and back to the gut.

In the new study, the researchers gave a group of mice enough antibiotics for them to become nearly free of intestinal microbes. Compared to untreated mice, the mice who lost their healthy gut bacteria performed worse in memory tests and showed a loss of neurogenesis (new brain cells) in a section of their hippocampus that typically produces new brain cells throughout an individual’s lifetime. At the same time that the mice experienced memory and neurogenesis loss, the research team detected a lower level of white blood cells (specifically monocytes) marked with Ly6Chi in the brain, blood, and bone marrow. So researchers tested whether it was indeed the Ly6Chi monocytes behind the changes in neurogenesis and memory.

In another experiment, the research team compared untreated mice to mice that had healthy gut bacteria levels but low levels of Ly6Chi either due to genetics or due to treatment with antibodies that target Ly6Chi cells. In both cases, mice with low Ly6Chi levels showed the same memory and neurogenesis deficits as mice in the other experiment who had lost gut bacteria. Furthermore, if the researchers replaced the Ly6Chi levels in mice treated with antibiotics, then memory and neurogenesis improved.

“For us it was impressive to find these Ly6Chi cells that travel from the periphery to the brain, and if there’s something wrong in the microbiome, Ly6Chi acts as a communicating cell,” says Wolf.

Researchers connect brain blood vessel lesions to intestinal bacteria

https://www.ninds.nih.gov/News-Events/News-and-Press-Releases/Press-Releases/Researchers-connect-brain-blood-vessel-lesions

A study in mice and humans suggests that bacteria in the gut can influence the structure of the brain’s blood vessels, and may be responsible for producing malformations that can lead to stroke or epilepsy. The research, published in Nature, adds to an emerging picture that connects intestinal microbes and disorders of the nervous system. The study was funded by the National Institute of Neurological Disorders and Stroke (NINDS), a part of the National Institutes of Health (NIH).

Cerebral cavernous malformations (CCMs) are clusters of dilated, thin-walled blood vessels that can lead to seizures or stroke when blood leaks into the surrounding brain tissue. A team of scientists at the University of Pennsylvania investigated the mechanisms that cause CCM lesions to form in genetically engineered mice and discovered an unexpected link to bacteria in the gut. When bacteria were eliminated the number of lesions was greatly diminished.

“This study is exciting because it shows that changes within the body can affect the progression of a disorder caused by a genetic mutation,” said Jim I. Koenig, Ph.D., program director at NINDS.

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