A monosaccharide precursor of Escherichia coli lipid A has the ability to induce tumor-cytotoxic factor production by a murine macrophage-like cell line, J774.1.
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| Abstract |
A monosaccharide precursor of Escherichia coli lipid A, designated lipid X, which is a diacylglucosamine 1-phosphate with beta-hydroxymyristoyl groups at positions 2 and 3, was shown to have the ability to induce the production of tumor necrosis factor (TNF)-like tumor-cytotoxic factor by a murine macrophage-like cell line, J774.1. This cytotoxic factor was released from J774.1 cells grown in the presence of lipid X and related compounds, and it was assayed as to its lytic activity against [3H]thymidine-labeled L929 cells. Dose-response studies revealed that lipid X induced the production of smaller amounts of the tumor-cytotoxic factor than LPS at low concentrations, but it induced that of considerable amounts at and over 1 microgram/ml. Elimination of 1-phosphate or 3-O-beta-hydroxymyristoyl group from lipid X completely prevented the induction of producing this factor by the macrophages. Therefore, it is suggested that both 1-phosphate and 3-O-beta-hydroxymyristoyl groups are essential for the biologic activity of lipid X, as to the induction of the tumor-cytotoxic factor production in the macrophages.
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| Authors | F Amano, M Nishijima, Y Akamatsu |
| Journal | Journal of immunology (Baltimore, Md. : 1950) (J Immunol) Vol. 136 Issue 11 Pg. 4122-7 (Jun 01 1986) ISSN: 0022-1767 [Print] United States |
| PMID | 3701065 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
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