Upregulation of immunoregulatory Src homology 2 molecule containing inositol phosphatase and mononuclear cell hyporesponsiveness in oral mucosa during chronic periodontitis.

ABSTRACT: Our group and others have shown in vitro that repeated exposure of human mononuclear cells (MNC) to lipopolysaccharide can induce endotoxin tolerance, evidenced by downregulation of TLR2 and TLR4 mRNA and surface protein; moreover, the ability of the MNC to secrete inflammatory cytokines is reduced. In situ studies performed on diseased and healthy gingiva suggest that a similar pattern of endotoxin tolerance occurs in human oral mucosa with chronic periodontitis (CP). We hypothesized that this represents a fundamental immunoregulatory mechanism to restore immune homeostasis and protect the host from further tissue damage. In the current study, we extend these published studies by providing evidence that Src homology 2 containing inositol phosphatase, an inhibitor of NF-kappaB activation a

SUBMITTER: Muthukuru M 

PROVIDER: S-EPMC1360327 | biostudies-literature | 2006 Feb

REPOSITORIES: biostudies-literature