What Researchers Did
Researchers tested whether hyperbaric oxygen therapy (HBOT) could improve memory and learning in mice bred to develop Alzheimer's disease, and examined whether it changed the activity of genes linked to a cell cleanup process called autophagy.
What They Found
This animal study found that Alzheimer's model mice given HBOT performed better in a water maze test than untreated Alzheimer's mice, needing less time to find the escape platform and spending more time in the target area (p less than 0.05 versus untreated Alzheimer's mice, and p less than 0.01 versus healthy mouse groups). Despite this improvement in maze performance, hippocampal brain tissue in HBOT-treated Alzheimer's mice still showed the same disorganized, damaged-looking neurons seen in untreated Alzheimer's mice, while healthy mice had normal-looking neurons whether or not they received HBOT. Gene testing found no difference between untreated Alzheimer's mice and untreated healthy mice, but five genes (Tgfb1, Mapk14, Bid, Atg7, and Akt1) were significantly higher in HBOT-treated Alzheimer's mice compared with untreated Alzheimer's mice.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
This was a small study in transgenic mice, and the brain tissue damage persisted despite HBOT, so the maze-test improvement did not correspond to visible tissue repair, meaning results may not translate to human Alzheimer's patients.