Metabolic responses to lipid infusions in patients with liver cirrhosis.

Metabolic responses to lipid infusions in patients with liver cirrhosis. Research Abstract Details 

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Metabolic responses to lipid infusions in patients with liver cirrhosis. Abstract Text:

M J ,A Rieger,O Willmann,H U Lautz,H J Balks,A ,H Canzler,F W Schmidt,

Energy expenditure, whole body substrate oxidation rates and arterial substrate concentrations were measured in 14 patients with liver cirrhosis and 13 control subjects before and during sequential infusions of a long chain (LCT) or a medium chain triglyceride emulsion (MCT) without and with concomitant insulin plus glucose infusions. Resting energy expenditure, basal substrate oxidation rates and the arterial concentrations of glucose, lactate, triglycerides and ketones were normal, whereas plasma free fatty acids and glycerol were both increased in patients with liver cirrhosis. The arterial plasma triglyceride and free fatty acid concentrations as well as whole body lipid oxidation rate rose in response to LCT in both groups and the maximum lipid oxidation rate was 1.1 or 1.3 mg/kg fat free mass x min in controls and in cirrhotics, respectively (n.s.). Concomitantly, glucose oxidation rate fell to 65% of basal values in controls (p < 0.01), but remained nearly unchanged in the cirrhotic group (89% of the basal value; n.s.). The increase in plasma ketones was reduced to 67% of control values in liver cirrhosis (p < 0.01). Only a slight effect on energy expenditure was observed in both groups. When compared to controls, liver cirrhosis impaired insulin-induced increases in glucose disposal (-30%, p < 0.01) and in non oxidative glucose metabolism (-93%, p < 0.01). Concomitantly, normal increases in energy expenditure, glucose oxidation rate and the arterial plasma lactate concentrations and normal decreases in lipolysis, lipid oxidation and ketogenesis were observed in patients with liver cirrhosis. When lipids were given together with glucose, energy expenditure and lipid oxidation increased in controls, but glucose was the preferred fuel oxidised and lipid-induced thermogenesis was reduced in the cirrhotic group. Using a 50% MCT-emulsion, plasma free fatty acid concentrations further increased, but energy expenditure and lipid oxidation remained unchanged in both groups and further increases in plasma ketones were only observed in controls. Infusing glycerol in a subgroup of patients showed no thermogenic effect and a reduced glycerol clearance in liver cirrhosis.

Metabolic responses to lipid infusions in patients with liver cirrhosis. Publishing Authors By Initials

MJ ,A Rieger,O Willmann,HU Lautz,HJ Balks,A ,H Canzler,FW Schmidt,

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Metabolic responses to lipid infusions in patients with liver cirrhosis. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Clinical nutrition (Edinburgh, Scotland)

VOLUME: 11

Page Numbers: 193-206

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ISSN: 0261-5614

DAY: 14

MONTH: Aug

YEAR: 1992

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LANGUAGE: eng

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AFFILIATION: Medizinische Hochschule Hannover, Department Innere Medizin, Gastroenterologie und Hepatologie und Klinische Endokrinologie, Konstanty-Gutschow-Str. 8, D 3000, Hannover 61, Germany.

Country: England

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MEDLINETA: Clin Nutr

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