Elucidation of autoummune condition in periodontitis-accelerated atherosclerosis and control by oral tolerance

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Not only live bacteria but also the cellular components, such as LPS have been participated in acceleration of the atherosclerosis by periodontopathic bacteria,and affected expression of TLR,MLR and oxidant stress,or HSP. The increase in autoantigens by periodontal infection was TLR dependent and correlated with the increase in autoantibody in clinical samples.Furthermore, it was suggested that oxidative modefication of LDL by periodontopathic bacteria induced autoimmune disorder.In contrast, immunization with P.gingivalis GroEL suppressed atherosclerosis with the reduction of inflammatory markers and autoimmune markers. These results suggest that oral tolerance induction is effective in reducing arteriosclerosis.