DIPHOSPHORYL-LIPID-A OBTAINED FROM THE NONTOXIC LIPOPOLYSACCHARIDE OF RHODOPSEUDOMONAS-SPHAEROIDES IS AN ENDOTOXIN ANTAGONIST IN MICE

被引:115
作者
QURESHI, N
TAKAYAMA, K
KURTZ, R
机构
[1] WILLIAM S MIDDLETON MEM VET ADM MED CTR,MYCOBACTERIOL RES LAB,2500 OVERLOOK TERRACE,MADISON,WI 53705
[2] UNIV WISCONSIN,COLL AGR & LIFE SCI,DEPT BACTERIOL,MADISON,WI 53706
关键词
D O I
10.1128/IAI.59.1.441-444.1991
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Diphosphoryl lipid A (DPLA) obtained from the nontoxic lipopolysaccharide (LPS) of Rhodopseudomonas sphaeroides ATCC 17023 did not induce interleukin-1 release by murine peritoneal macrophages. However, it blocked this induction by toxic deep-rough chemotype LPS (ReLPS) from Escherichia coli D31m4. Previously, we obtained similar results on the induction of tumor necrosis factor (TNF) by macrophages. These results showed that DPLA is able to block in vitro the induction of two important mediators of gram-negative bacterial sepsis. We then wanted to determine whether DPLA could also block the induction of TNF by LPS in animals. Mice were treated with 100-mu-g of R. sphaeroides DPLA and challenged 60 min later with 1.0-mu-g of ReLPs from E. coli. The serum TNF level was measured after 60 min. Treatment of mice with this DPLA blocked the rapid and transient rise of TNF caused by ReLPS. This result suggested that R. sphaeroides DPLA might be able to protect animals against endotoxin shock caused by gram-negative bacterial infection.
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收藏
页码:441 / 444
页数:4
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