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Annales de la nutrition et de l'alimentation 1976

[Tolerance and metabolic results of long-term administration of a mixture of saturated triglycerides by recto-colic route in rabbits].

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A Dorier
J P Perret
C Bacques

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Rabbit's and Dog's colonic absorption of triglycerides is shown in previous works. Further, we are studying the possibility to use the rectal route for nutritive substances. This way remains now poorly used and an exceptional therapeutic. However, bringing triglycerides in adequate state would be an energetic, supply, all the more as it is very difficult to provide potent caloric source in parenteral nutrition. This is why we investigate, on the Rabbit, the issues of chronic administration of glycerides by rectal route, on caloric balance and on a biochemical view to seek for in lipid composition of tissues the print of lipids administrated by transanal way. The animals are individually housed in metabolism units feeding a standard diet and drinking ad libitum. The treated subjects are given by transanal way, twice a day, for eight weeds, a sum of 1 g/kg of medium chain triglycerides. The metabolic balance-sheet is daily drawn. The clinic balance-sheet is set on the end, by biological controls to explore the hepatic and renal function (prothrombine ratio, transaminases (SGOT, SGPT), ornithine, carbamyl transferase (OCT), urea, total proteins ratio and electrolyte imbalance. We measure also the concentration of total lipids plasma and tissue (liver, kidney, heart, lungs, perirenal adipose tissue). The triglyceride composition and fatty acid composition of different lipids fractions of control and treated subjects are analyzed by gas-liquid chromatography. The animals support perfectly, without damage, a chronic and massive (1 g/kg/each day) administration of medium chain triglycerides by rectal route. The growth of treated subjects is normal. On the opposite, they adjust their alimentary consumption with the caloric charge of the diet, this is the reason why the reduction is about 12p. 100 with respect to the control animals. The coli-rectal administration of saturated glycerides produces at middle end only qualitative variations of lipids extracts. They essentially affect the triglyceride and fatty acid fraction of the tissue lipids, they become intermediate between that of control animals and the mixture administered by the transanal way. These results prove the integration of the glycerides in the metabolic pathway. They show the problem of the colonic absorption for the liposoluble substances. They authorize researches in view of a possible caloric assistance by this way.

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