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. 1984 Jan;43(1):178–182. doi: 10.1128/iai.43.1.178-182.1984

Biological activities of Eikenella corrodens outer membrane and lipopolysaccharide.

A Progulske, R Mishell, C Trummel, S C Holt
PMCID: PMC263406  PMID: 6360893

Abstract

Highly purified preparations of the outer membrane and lipopolysaccharide (LPS) of Eikenella corrodens strain ATCC 23834 and the outer membrane fraction (OMF) of strain 470 were tested in in vitro biological assays. The OMFs of both strains were found to be mitogenic for BDF and C3H/HeJ murine splenocytes. The E. corrodens LPS was mitogenic for BDF spleen cells; however, doses of LPS as high as 50 micrograms/ml failed to stimulate C3H/HeJ cells. When incubated with T-lymphocyte-depleted C3H/HeJ splenocytes, the strain 23834 OMF demonstrated significant mitogenic activity, indicating that the OMF is a B-cell mitogen by a mechanism other than that elicited by conventional LPS. The E. corrodens 23834 OMF and LPS were stimulators of bone resorption when tested in organ cultures of fetal rat long bones. In contrast, the strain 470 OMF was only weakly stimulatory. Both OMFs and LPSs demonstrated "endotoxic" activity, since as little as 0.062 micrograms of E. corrodens LPS and 0.015 micrograms of the OMFs induced gelation in the Limulus amebocyte clotting assay. Thus, despite having a "nonclassical" LPS biochemistry, the E. corrodens LPS elicits classical endotoxic activities. These results also indicate that the surface structures of E. corrodens have significant biological activities as measured in vitro. The expression of such activities in vivo may play an important role in the pathogenesis of periodontitis as well as other E. corrodens infections.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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