USE OF A MATERIAL, THE MAIN CONSTITUENT OF WHICH IS A TRIGLYCERIDE, AS AN AGENT WITH BIOLOGICAL EFFECT ON THE INTESTINAL MUCOSA AND PREPARATION CONTAINING SUCH AGENT

Abstract: The material, the main constituent of which is a triglyceride which contains both one or more linear, saturated or unsaturated acyl groups containing 2 - 5 carbon atoms, and one or more linear, saturated or unsaturated acyl groups containing 16 - 24 carbon atoms, is used as an agent with biological effect on the intestinal mucosa. This agent does not exhibit the drawbacks, which usually accompany the prior art agents with biological effect on the intestinal mucosa.

Description: USE OF A MATERIAL, THE MAIN CONSTITUENT OF WHICH IS A TRIGLYCERIDE, AS AN AGENT WITH BIOLOGICAL EFFECT ON THE INTESTINAL MUCOSA AND PREPARATION CONTAINING SUCH AGENT The invention comprises the use of a material, the main constituent of which is a triglyceride, as an agent with biological effect on the intestinal mucosa, especially an agent, which prevents development of and reconstitutes atrophic mucosa, and a preparation containing such agent. The prior art agents with biological effect on the intestinal mucosa are either enteral or parenteral. The prior art enteral agents, which reconstitute atrophic mucosa and prevent development of atrophic mucosa, are either fibres (vide e.g. John H. Cummings, The Role of Dietary Fiber in Enteral Nutrition, Abbott International LTD, Abbott Park, Illinois 60064) or free fatty acids (vide the Review Bacterial short-chain fatty acids and mucosal diseases of the colon, Br. J. Surg. 1988, vol. 75, April, 346-348). The fibres exhibit the disadvantage comprising generation of voluminosity in the faeces, and for that reason low residue diets have been developed. The free fatty acids exhibit the drawback of a bad smell and a bad taste. Furthermore the free fatty acids are subject to the so-called first pass effect, i.e. they are rapidly eliminated by the liver after being absorbed from the intestines into the blood stream, and thus, they will not be circulated in the blood stream and will thus only exert a minor effect on the intestinal mucosa. The prior art parenteral agents, which reconstitute atrophic mucosa and prevent development of atrophic mucosa, are free fatty acids (vide Koruda et al., Gastroenterology 1988; 95:715-20, Effect of Parenteral Nutrition Supplemented With Short-Chain Fatty Acids on Adaptation to massive Small Bowel Resection), but with parenteral administration the free fatty acids develop acidosis. Thus the purpose of the invention is the provision of an agent with biological effect on the intestinal mucosa, which is not accompanied by the above indicated drawbacks. Now, surprisingly according to the invention it has been found that members of a specific group of triglycerides are able to fulfil this purpose. Thus, the invention comprises the use of a material, the main constituent of which is a triglyceride, which contains both one or more linear, saturated or unsaturated acyl groups containing 2 - 5 carbon atoms, and one or more linear, saturated or unsaturated acyl groups containing 16 - 24 carbon atoms, as an agent with biological effect on the intestinal mucosa. The above indicated triglycerides are described p_er se in DE 1418149, but it does not appear from DE 1418149 that they can be used as agents with biological effect on the intestinal mucosa. Surprisingly it has been found that the agent according to the invention does not exhibit any of the drawbacks which accompany prior art agents with biological effect on the intestinal mucosa. Furthermore, besides their capacity as agents with biological effect on the intestinal mucosa, they are able to function as emulsifiers, and thus, they can be introduced into the organism as emulsifiers for nutritional fats and thus at the same time perform two distinct and separate functions. In a preferred embodiment of the use according to the invention the triglyceride has the general formula r OR 2 r OR 2 or I- OR, or I - OR, L 0R 3 OR, wherein R, and R 3 are identical or different, each representing a linear, saturated or unsaturated acyl group containing 2 - 5 carbon atoms, and wherein R 2 and R 4 are identical or different, each representing a linear, saturated or unsaturated alkyl group containing 16 - 24 carbon atoms. These agents exhibit both an excellent biological effect on the intestinal mucosa and an excellent effect as an emulsifier. Also, the invention encompasses a preparation containing an agent used in the invention. In a preferred embodiment of the preparation according to the invention the preparation is for enteral use, and the preparation is an aqueous fat emulsion, in which the agent constitutes 1-100% of the total fat. In a preferred embodiment of the preparation for enteral use according to the invention, in which the agent constitutes less than 100% of the total fat, the non agent fatty material is soy oil, sunflower oil, safflower oil, canola oil, fish oil, or MCT oils. Other examples are the structured lipids which are described in PCT/DK 89/00232, 89/00233, 89/00234, 89/00235, 89/00236, 89/00237, 89/00238, and 89/00239. Another embodiment of the preparation for enteral use can be formulated as indicated in Example 1 of European patent specification EP 0 246 747, except for the fact that necessary vitamins and minerals are added. These embodiments offer the possibility for production of a fat which is nutritionally balanced. In a preferred embodiment of the preparation according to the invention the preparation is for parenteral use, and the agent constitutes 1 -100% of the fat source. In a preferred embodiment of the preparation for parenteral use according to the invention the average diameter of the fat globules is between 5 and 1500 nm, less than 5% of the fat globules exhibit a diameter above 5000 n , and the preparation contains approx. 2-3% glycerol. Giycerol is added in such amount that the preparation is isotonic. Other isotonicity generating agents can be used. Also, other auxiliary agents, such as pH regulating agents, can be added. Example 1 illustrates the synthesis of a triglyceride within the scope of Claims 1 and 2, Examples 2 and 3 illustrate the production of a preparation according to Claim 3, whereby Example 2 is related to Claim 6 and Example 3 is related to Claim 4, and Example 4 illustrates the effect of a perorally administered preparation according to the invention on gut mucosal growth in rats. EXAMPLE 1 Synthesis of a lipid containing both butyric acid and long chain acids 30 g of a high oleic sunflower oil and 6 g of butyric acid dissolved in 150 ml heptane was shaken together with 3 g of Lipozyme (a commercially available lipase from Novo Nordisk A/S) at 40°C for 24 hours. Thereafter the immobilized lipase was filtered off and the mixture was introduced onto a column containing 600 g of activated alkaline Al 2 0 3 , and the column was eluted with 800 ml of diethyl ether. The diethyl ether was removed by evaporation under vacuum. The remaining lipid was 100% triglycerides, i.e. no mono- or diglyceride was present. The fatty acid composition was analyzed by conversion of the fatty acids to butyl esters, catalyzed by sodium butylate dissolved in butanol, and injection in a capillary gas chromatograph. The fatty acid composition of the lipid was as follows: For later reference this lipid is identified by the term lipid 89.034. EXAMPLE 2 A parenteral diet product is prepared according to the following formula: Composition for 100 ml Lipid 89.034 1.2 g Glyeerol 2.25 g Soy oil 10.0 g Water to 100 ml For the preparation of one liter of product the procedure is as follows: Production procedure I is mixed with II in a high shear mixer (Ultra Turrax). The pre-emulsion is homogenized in a high pressure homogenizer and then introduced into a suitable container. The product is finally pasteurized at 85°C for 0 minutes. Analytical data Particle size: 1.2 μm Osmolality: 260 mOsm/kg water pH: 7.1 EXAMPLE 3 An enteral diet product is prepared according to the following formula: Composition for 100 ml Protein: Soy protein hydrolysate (Nx6.25) 3.75 g Carbohydrate: Maltodextrins 13.75 g Fat: Medium chain triglycerid 1.73 g Corn oil 1.00 g Soy bean oil 0.35 g Lipid 89.034 0.39 g Water: to 100 ml For the preparation of one liter of product the procedure is as follows: Constituents I Tri-calcium dϊcitrate, 4H 2 0 1.044 g Tri-sodium citrate, 2H 2 0 1.84 g Tri-potassium citrate, H 2 0 2.42 g Citric acid, H 2 0 2.75 g Methionine 0.48 g Tryptophan 0.16 g Ascorbic acid 0.30 g Aspartam 0.315 g Vitamin premix 0.10 g II Soy protein hydrolyzate 37.0 g Water 200 ml III Maltodextrin 137.5 g Pectin 2.5 g Water 400 ml IV Viscoleo 17.3 g Corn oil 10.0 g Lipid 89.034 3.9 g Soy oil 3.5 g V Water to 1000 ml Production procedure I is dissolved in II. pH is measured to pH = 4.3. Maltodextrin and pectin are dissolved in water by heating to 50° C, III is mixed with I + II and IV is added. The product is homogenized on a high pressure homogenizer. The product is introduced into a suitable container and pasteurized at 85 °C for 10 minutes. Analytical data Particle size: 0.66 μm Osmolality: 266 mOsm/kg water pH: 4.3 EXAMPLE 4 This example illustrates the effect of perorally administered SLS on gut mucosal growth in rats, SLS being an abbreviation for a structured lipid with butyrate in 1 and 3 positions and long chain fatty acids from soy bean oil in the 2 position. 30 Sprague Dawley rats (average 300 g) were randomly assigned to receive one of the following diets: 1) Standard rat Chow 2) Elemental diet and maltodextrin 3) Elemental diet and structured lipid emulsion (SLS) The elemental diets were Vivasorb from Pfrimmer. Diets 1) - 3) were provided in isocaloric amounts (230 kcal/kg body wt/day) for 8 days. The lipid content in diet 3) was 5% by weight. All diets contained choline chloride (194 μg/kcal). At day 8 the animals were anesthetized with C0 2 /0 2 mixture and exsanguinated, and the intestine was rapidly excised. 10 cm segments from the proximal jejunum and colon were obtained, opened longitudinally, rinsed in saline solution and scraped with a scalpel for complete removal of mucosa. The mucosal scrapings were weighed, freeze-dried and frozen at -20° C until analysis for protein 1 and DNA 2 . In addition 2 cm segments of the proximal jejunum and colon were excised and fixated in formalin for morphometric analysis. The dietary effect on the jejunal mucosal dry weight, protein and DNA content appears from the following table. Diets Mucosal DNA Mucosal weight Mucosal protein (μg/cm) (mg/cm) (mg/cm) 1) Chow 384.4 ± 38.9 11.6 ± 0.90 5.57 ± 0.45 2) Maltodextrin + Vivasorb 392.5 ± 41.1 10.5 ± 0.39 4.31 ± 0.32 3) SLS + Vivasorb 479.8 ± 41.6 11.5 ± 0.33 4.74 ± 0.37 Values are average of 10 independent determinations ± SEM Chow 1) is the normal, fibre containing diet. In case of some diseases, however, the normal fibre containing diet can not be used, and a fibre free, fluid diet has to be used. Thus, the diet 2) is the prior art diet most related to the diet according to the invention, 3). It appears from the above table that the diet according to the invention in all regards corresponding to the heads of the last three columns are superior to the prior art diet most related to the diet according to the invention. Also, the diet according to the invention comes close to the normal fibre containing diet in regard to mucosal protein, it comes very close to the normal fibre containing diet in regard to mucosal weight, and it supersedes the normal fibre containing diet in regard to mucosal DNA, thus indicating that the mitotic activity generated by the diet according to the invention is very high. References: 1. Lowry OH, Rosebrough NJ, Farr AL and Randall R: Protein measurement with the folin phenol reagent. J.Biol.Chem. 193: 265-275, 1951 2. Cesarone CF, Bolognesi C and Santi L: Improved microgluorometric DNA determination in biological material using 33258 Hoechst. Anal.Biochem. 100: 188- 197, 1979

Claims: CLAIMS 1. Use of a material, the main constitutent of which is a triglyceride which contains both one or more linear, saturated or unsaturated acyl groups containing 2 - 5 carbon atoms, and one or more linear, saturated or unsaturated acyl groups containing 16 - 24 carbon atoms, as an agent with biological effect on the intestinal mucosa. to Claim 1 , wherein the triglyceride has the general OR, r OR 2 or I- OR, or | - OR, 1 OR, L OR 4 wherein R, and R 3 are identical or different, each representing a linear, saturated or unsaturated acyl group containing 2 - 5 carbon atoms, and wherein R 2 and R 4 are identical or different, each representing a linear, saturated or unsaturated alkyl group containing 16 - 24 carbon atoms. 3. Preparation containing an agent with biological effect on the intestinal mucosa, wherein the agent is the agent used in Claim 1. 4. Preparation for enteral use according to Claim 3, wherein the preparation is an aqueous fat emulsion, in which the agent constitutes 1-100% of the total fat. 5. Preparation according to Claim 4, in which the agent constitutes less than 100% of the total fat, wherein the non agent fatty material is soy oil, sunflower oil, safflower oil, canola oil, fish oil, or MCT oils. 6. Preparation for parenteral use according to Claim 3, wherein the agent constitutes 1-100% of the fat source. 7. Preparation according to Claim 6, wherein the average diameter of the fat globules is between 5 and 1500 nm, wherein less than 5% of the fat globules exhibit a diameter above 5000 nm, and wherein the preparation contains approx. 2-3% glyeerol.

Inventors: FROEKJAER SVEN, HANSEN TOMAS TAGE, FROEKJAER, SVEN, HANSEN, TOMAS, TAGE
Applicants: NOVONORDISK AS, NOVO NORDISK A/S
Application year: 1990
Main classification: A61K31
IPC codes: A23L1, A61K9, A61K31, A61K36, A61P1, A61P43, C07C69