Does Prolonged Antibiotic Use Kill Brain Cells?

Gone are the days where prolonged antibiotic use is without healthy scrutiny. Even in allopathic circles, there appears to be hesitation when it comes to prescribing antibiotics unnecessarily. However, the potential adverse effects that can be tied up with such use are still being revealed. A new study published in the Journal Cell Reports notes a new concern to add to that file.

Studies in mice have revealed that antibiotics strong enough to kill off gut bacteria can also stop the growth of new brain cells in the hippocampus [1]. It appears that researchers have uncovered an interesting clue as to why this link exists: “a type of white blood cell seems to act as a communicator between the brain, the immune system and the gut [1].” Once again, research is revealing just how inextricable the gut and brain really are.

The study saw researchers give mice enough antibiotics to almost decimate their gut microbiota. Interestingly, those that lost their healthy gut bacteria where shown to perform worse in memory tests. They also showed a loss of new brain cell creation or neurogenesis in the hippocampus. Here’s where it gets interesting though: the white blood cell link.

“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 [1].”


The researchers did assert that antibiotics are still remarkably useful but noted the adverse effects that can be tied up with prolonged use [2]. Concerningly, “reconstitution with normal gut flora (SPF) did not completely reverse the deficits in neurogenesis unless the mice, also had access to a running wheel or received probiotics [2].”

Wolf remarked,

“We found prolonged antibiotic treatment might impact brain function. But probiotics and exercise can balance brain plasticity and should be considered as a real treatment option [1].”

She noted her surprise that the fecal transplant option recovered the broad gut bacteria but did not recover neurogenesis. “This might be a hint towards direct effects of antibiotics on neurogenesis without using the detour through the gut,” she remarked before speculating on what their next course of investigation must be [1].

This provides the latest piece on insight not only into the importance of the gut microbiome, but also the role of human monocytes. While their role in inflammation had long been uncovered, we could be discovering just how important they are in other aspects of human health [3].

But the major takeaway from this piece of work is that, when the use of antibiotics cannot be avoided, the use of probiotics and exercise becomes even more important. After all, I think we’d all rather a probiotic and a walk in the sun or a quick jog than a faecal transplant. It turns out the jog and the probiotic are even better when it comes to protecting and promoting brain function.


The Spinal Centre Comment:

This article was written by The Australian Spinal Research Foundation; we thank them for the content.



[1] Staff Writer Cell Press, 2016. “Antibiotics that kill gut bacteria also stop growth of new brain cells.” Cell Reports via Science Daily retrieved 15 February 17

[2] Mohle L, Mattei D, Heimesaat M, Bereswill S, Fischer A, Alutis M, French T, Hambardzumyan D, Matzinger P, Dunay I and Wolf S. 2016.  LY6Chi monocytes provide a link between antibiotic-induced changes in gut microbiota and adult hippocampal neurogenesis. Cell Press. Voume 15, Issue 9, p1945-1956 31 May 2016, retrieved 15 February 2017

[3] Gaidt M, Ebert T, Chauhan D, Schmidt T, Schmid-Burgk J, Rapino F, Robertson A, Cooper M, Graf T and Hornung V. 2016. Human monocytes engage an alternative inflammasome pathway. Immunity. Volume 44, Issue 4, p833-846 retrieved 15 February 2017

Article sourced from Australian Spinal Research Foundation


You must be logged in to post a comment.

The Spinal Centre – Neuro-Musculoskeletal SolutionsThe Spinal Centre provides the Best Natural Medicines, Health Products and Nutritional Solutions to Free You of Pain and Improve Your Spinal Health.The Spinal Centre is a leader in the management and treatment of spinal pain and disability including:

  • Chronic Back and Neck Pain
  • Cervical and Lumbar Disc Injuries with or without neruological changes
  • All forms of arthritis including rheumatoid arthritis, psoriatic arthritis and osteoarthritis
  • Neurodegenerative diseases such as Parkinson’s and Alzheimer’s disease
  • Neuromuscular problems such as chronic back pain, headaches, migraines, neck or spinal pains
  • Myofascial pain syndromes such as fibromyalgia, diffuse muscular or joint pains
  • Austistic spectrum disorders including ADD, ADHD, learning difficulties and autism
  • Fatigue, energy and mood disorders including chronic fatigue and depression

The Spinal Centre focuses on resolution with the development of individualised treatment programs using Conservative and Integrative Medicine; combining genetic, metabolic and nutritional testing with specific natural medicines to enhance your health and achieve your genetic potential.We have helped thousands – Why Not You?