Farmington, CT – Current research suggests that a common oral bacterium may exacerbate autoimmune disease. The related report by Nichols et al, "Unique Lipids from a Common Human Bacterium Represent a New Class of TLR2 Ligands Capable of Enhancing Autoimmunity," appears in the December 2009 issue of The American Journal of Pathology.
Multiple sclerosis (MS), a disease where the immune system attacks the brain and spinal cord, affects nearly 1 in 700 people in the United States. Patients with multiple sclerosis have a variety of neurological symptoms, including muscle weakness, difficulty in moving, and difficulty in speech.
Porphyromas gingivalis, a common oral bacterium in humans, produces a unique type of lipid, phosphorylated dihydroceramides (DHCs), which enhance inflammatory responses. These lipids are also likely produced by bacteria found in other parts of the body including the gastrointestinal tract. To determine if these lipids accentuate immune-mediated damage in autoimmune disease, researchers led by Robert B. Clark and Frank C. Nichols of the University of Connecticut Health Center administered phosphorylated DHCs in a mouse model of MS. The severity of disease was significantly enhanced by the addition of these lipids in a manner that was dependent on activation of the immune system. These data suggest that phosphorylated DHCs from bacteria commonly found in humans may trigger or increase the severity of autoimmune diseases such as multiple sclerosis.
The authors state that "while it is clear that the immune system in most individuals has the potential to attack self-tissues, the "tipping" factors that initiate and propagate autoimmune diseases such as multiple sclerosis in only a subset of individuals remain unknown. Overall, [their] results represent the first description that phosphorylated DHCs derived from common human bacteria are capable of enhancing autoimmune disease." Thus, these lipids may function as "tipping" factors, playing a previously unrecognized role in initiating or exacerbating human autoimmune diseases. In future studies, Dr. Clark and colleagues plan to characterize the effects of phosphorylated DHCs on specific cells of the immune system and to identify how and where these lipids are deposited in tissues throughout the body. In addition to the role of these lipids in triggering and worsening MS, the authors believe that phosphorylated DHCs may have the potential to serve both as new markers of MS disease activity and as new targets for therapeutic intervention.
2 comments:
This is really interesting. Noticed years ago MS higher in countries with lot of sea[Canada,Scandinavia, Hebrides -so oftedn wondedred if virus involved My notes said it was triggered by shock to system. In Med sea with turds around and ate local lobster[picks up affluent-why shell fish banned to Jews] but despite this Jews still get MS
I had shock of dysentry[bacteria infection] then 2 weeks later numness in legs Took ages to diagnose
and wasnt until after double vision [that went] after twin birth.
It would really make me sick to think that I got MS because I didn't brush (including our tongue), floss and use listerine enough so that this bacteria could live in my mouth and maybe cause MS to come alive in me. I have GERD since the diagnosis or MS and really bad gastritis...maybe it really is all related!
Post a Comment