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. 1994 May;1(3):295–298. doi: 10.1128/cdli.1.3.295-298.1994

Lipopolysaccharide-reactive immunoglobulin E is associated with lower mortality and organ failure in traumatically injured patients.

J T DiPiro 1, R G Hamilton 1, T R Howdieshell 1, N F Adkinson Jr 1, A R Mansberger Jr 1
PMCID: PMC368251  PMID: 7496965

Abstract

Antilipopolysaccharide (anti-LPS) immunoglobulin G (IgG) and IgM have been associated with protection from LPS effects in vivo. We investigated the presence of IgE and anti-LPS in 32 patients that had experienced severe traumatic injury and in 35 healthy volunteers; we also investigated whether IgE anti-LPS was associated with important clinical events. Plasma samples were collected daily from patients in the intensive care unit and on one occasion from volunteers; the samples were assayed for IgE anti-LPS. IgE anti-LPS was assayed by enzyme-linked immunosorbent assay with monoclonal anti-human IgE as the capture antibody. Detection was accomplished with biotin-labeled LPS (Escherichia coli J5 mutant) followed by streptavidin-peroxidase with 2,2'-azino(3-ethylbenzthiazoline)sulfonic acid as the substrate. The assay was demonstrated to be specific for IgE and LPS-biotin by nonreactivity of control sera with high-titer anti-LPS IgG and IgM and by inhibition with unlabeled LPS. IgE anti-LPS was detected in 1 of 35 healthy controls (2.9%) and 25 of 32 traumatically injured patients (78%) (P < 0.001). The presence of IgE anti-LPS was associated with a lower incidence of death (P = 0.026) and of renal failure (P = 0.0012). There was no apparent temporal relationship between detection of IgE anti-LPS and clinical events. IgG anti-LPS was detected more frequently in patients that were positive for IgE anti-LPS (P = 0.06) but was not associated with clinical events. The inability to detect IgE anti-LPS may be related to adverse clinical events through depletion of specific IgE due to LPS exposure after trauma or through saturation of the assay by IgE with other specificities. We have reported increased total IgE concentrations in these patients. (J.T. DiPiro, R.G. Hamilton, T. R. Howdieshell, N. F. Adkinson, and A. R. Mansberger, Ann. Surg. 215:460-466, 1992).

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Selected References

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