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Intravenous Fat Emulsion Acutely Suppresses Neutrophil Chemiluminescence
Arnold P. Robin, M.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
Imtiaz Arain, M.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
Anan Phuangsab, PH.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
Oksana Holian, PH.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
Peter Roccaforte, PH.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
John A. Barrett, M.D.
Department of Surgery, University of Illinois College of Medicine, Chicago, Illinois
The immediate effect of intravenous fat emulsion on neutrophil oxidant release was studied. Opsonized nonencapsulated S. aureus was used to stimulate neutrophil activity. Luminol enhanced chemiluminescence was followed over 15 min and recorded as peak output (P; mV), integral under the curve (I; V·sec) and rate of increase (R; mV/sec). Eighteen chronically ill patients receiving glucose based total parenteral nutrition were studied before and after a 4- to 6-hr test infusion of 500 ml of 10% fat emulsion. P decreased from 719 ± 46 to 461 ± 42 mV (p < 0.001), I decreased from 169 ± 17 to 111 ± 12 V·sec (p < 0.001) and R decreased from 6.9 ± 1.0 to 4.0 ± 0.6 mV/sec (p < 0.001). Preincubation of normal whole blood with fat emulsion in vitro did not adversely affect chemiluminescence (11 studies), nor did incubation of normal neutrophils with patient postinfusion plasma (10 studies). We conclude that fat emulsion infusion acutely suppresses neutrophil chemiluminescence. The suppression is not a direct effect of the fat emulsion per se and is not due to inhibitory substances in the plasma following infusion. (Journal of Parenteral and Enteral Nutrition 13:608-613, 1989)
Journal of Parenteral and Enteral Nutrition, Vol. 13, No. 6,
608-613 (1989)
DOI: 10.1177/0148607189013006608
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