Psilociraptor said...
Lapis_29 said...
Psilociraptor said...
This isn't one i've gone particularly deep into in terms of the mechanisms... But in my limited understanding, borrelia and other neurotropic bacteria cross-seed their own amyloids with human amyloids and initiate biofilm formation leading to the plaque structures. It certainly should be treatable in the sense of preventing progression. I'm optimistic that it's probably treatable in the sense of reversing it. However, if it is a biofilm disease... I'm not so optimistic about commonplace antibiotics.
Anyways I would recommend digging around Miklossy's work. She's done a lot on this connection. Here's a paper to start. You'll probably find more in the reference section https://www.ncbi.nlm.nih.gov/pubmed/27314530
according to miklossy, the amyloid plaque is a defense mechanism in the brain meant to defend itself against pathogenic invasion. so its a symptom NOT the cause of dementia/alzheimers. The pathogens do not secrete their own amyloid plaque.
the plaque is meant to sort of surround and isolate the invading pathogen, neutralize it. But the side effect is gumming up the brain works.Read the paper I linked. Or just the title
Bacterial AND human amyloids are found in the plaques. Amyloids are common components of bacterial biofilms and they can cross-seed with amyloids produced by other species. I realize this is apparently in conflict with the traditional view that amyloids are protective mechanisms. And I'm not really sure whether that has been resolved. But other researchers too have found that, for example, gut microbes produce amyloids that instigate amyloid "misfolding" in the brain. There is some sort of interplay between bacterial and human amyloids whether or not human amyloids are meant to be protective. Miklossys paper suggests that this interaction is involved in biofilm formation. Which is in agreement with the fact that amyloids are basic components of biofilms in general
I haven't read this one yet, but it seems like it might be helpful in this issue http://jb.asm.org/content/198/19/2579.fullhuh, well then miklossy's theory has evolved recently, interesting. Last I read she theorized the amyloids were protective mechanisms secreted by the brain, but this study would indicate they are possibly a result of biofilms. Thats a new development I was unaware of, wow.