PERSISTENCE OF METABOLIC EFFECTS AFTER LONG-TERM ORAL-FEEDING OF A STRUCTURED TRIGLYCERIDE DERIVED FROM MEDIUM-CHAIN TRIGLYCERIDE AND FISH OIL IN BURNED AND NORMAL RATS

被引:12
作者
SWENSON, ES [1 ]
SELLECK, KM [1 ]
BABAYAN, VK [1 ]
BLACKBURN, GL [1 ]
BISTRIAN, BR [1 ]
机构
[1] NEW ENGLAND DEACONESS HOSP, NUTR INFECT LAB, 194 PILGRIM RD, BOSTON, MA 02215 USA
来源
METABOLISM-CLINICAL AND EXPERIMENTAL | 1991年 / 40卷 / 05期
关键词
D O I
10.1016/0026-0495(91)90229-P
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The persistence of metabolic effects following long-term oral feeding of a structured triglyceride rich in ω-3 fatty acids was studied in burned and normal rats, and compared with controls fed safflower oil, a long-chain triglyceride high in ω-6 fatty acid content. Male Sprague-Dawley rats were pair-fed a high fat diet as either structured triglyceride or safflower oil for 42 days. On day 43, a jugular catheter was placed, and rats received either a dorsal surface scald or sham injury. Following a 48-hour fast, body weight, nitrogen loss, energy metabolism, and liver weight were measured, and whole-body and tissue-specific protein kinetics were studied by constant intravenous infusion of [1-14C]leucine. Plasma albumin, free fatty acids, glucose, insulin, and triglyceride fatty acid composition were determined. Urinary nitrogen loss, energy expenditure, and plasma leucine concentration were elevated in burned rats, confirming the presence of an injury response. Rats previously fed structured triglyceride had greater liver weight, total liver protein, and percentage of leucine flux oxidized, and plasma levels of glucose and insulin were increased. Plasma leucine concentration was decreased in rats previously fed structured triglyceride. Plasma triglyceride and phospholipid fatty acid analysis showed a reduction in arachidonic acid and an increase in ω-3 fatty acids in rats previously fed structured triglyceride. Long-term feeding of structured triglyceride induced major systemic metabolic changes related to the dietary fatty acid composition that persist after the diet is discontinued. © 1991.
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收藏
页码:484 / 490
页数:7
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