Abstract
ABSTRACTLipopolysaccharide (LPS) obtained fromPorphyromonas gingivaliswas found to exhibit marked lethal toxicity in galactosamine-sensitized C3H/HeJ mice. Although no lethality was observed in mice intraperitoneally challenged with 1 mg ofP. gingivalisLPS without galactosamine, when they were sensitized with 30 mg of galactosamine, challenge with 1 and 10 μg of LPS resulted in 67 and 100% lethality, respectively. The lethal dose of LPS was almost the same in LPS-responsive C57BL/6 mice and non-LPS-responsive C3H/HeJ mice. Furthermore, when 1 μg ofP. gingivalisLPS was administered to each mouse 90 min before the challenge with the same LPS with galactosamine, tolerance to the lethal action of LPS was induced, and the mice were completely protected from death, even at a dose 100-fold greater than the lethal dose of LPS. Neither a lethal effect nor induction of tolerance to the lethality ofP. gingivalisLPS was exhibited bySalmonellaLPS in galactosamine-sensitized C3H/HeJ mice. A protein-LPS complex derived fromPseudomonas aeruginosa, which exhibited strong lethality and induced tolerance to a subsequent challenge with a lethal dose of LPS in galactosamine-sensitized LPS-responsive mice, did not exhibit lethal toxicity in galactosamine-sensitized C3H/HeJ mice and failed to induce tolerance in these mice to the lethality ofP. gingivalisLPS. These results indicate thatP. gingivalisLPS plays the central role in the activation of non-LPS-responsive C3H/HeJ mice.
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Dates
Type | When |
---|---|
Created | 5 years, 7 months ago (Dec. 31, 2019, 10:36 a.m.) |
Deposited | 1 year, 11 months ago (Sept. 24, 2023, 10:39 a.m.) |
Indexed | 1 year, 10 months ago (Oct. 9, 2023, 2:45 p.m.) |
Issued | 26 years, 1 month ago (July 1, 1999) |
Published | 26 years, 1 month ago (July 1, 1999) |
Published Print | 26 years, 1 month ago (July 1, 1999) |
@article{Tanamoto_1999, title={Induction of Lethal Shock and Tolerance byPorphyromonas gingivalisLipopolysaccharide in<scp>d</scp>-Galactosamine-Sensitized C3H/HeJ Mice}, volume={67}, ISSN={1098-5522}, url={http://dx.doi.org/10.1128/iai.67.7.3399-3402.1999}, DOI={10.1128/iai.67.7.3399-3402.1999}, number={7}, journal={Infection and Immunity}, publisher={American Society for Microbiology}, author={Tanamoto, Ken-Ichi}, editor={McGhee, J. R.}, year={1999}, month=jul, pages={3399–3402} }