Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
  • A61K36/18—Magnoliophyta (angiosperms)
  • A61K36/185—Magnoliopsida (dicotyledons)
  • A61K36/22—Anacardiaceae (Sumac family), e.g. smoketree, sumac or poison oak
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23K—FODDER
  • A23K20/00—Accessory food factors for animal feeding-stuffs
  • A23K20/10—Organic substances
  • A23K20/158—Fatty acids; Fats; Products containing oils or fats
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/14—Prodigestives, e.g. acids, enzymes, appetite stimulants, antidyspeptics, tonics, antiflatulents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
  • A61P3/02—Nutrients, e.g. vitamins, minerals
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/04—Antibacterial agents

Definitions

• the present invention relates to a rumen fermentation improving agent, a composition for a feed, and a feed each containing cashew nut shell liquid, and a breeding method for a ruminant or the like using the same.
• ruminants such as cattle and sheep
• a feed is digested and fermented by microorganisms in their rumens, and the ruminants live by utilizing the fermentation products. Therefore, it is a loss of energy efficiency when methane is generated from the rumens. Further, because methane is a greenhouse gas that influences the global warming, it is important to reduce the amount of methane produced in the rumens of the ruminants.
• a methanogen in a rumen reduces carbon dioxide by utilizing hydrogen to thereby produce methane.
• the contribution ratio of methane to the global warming is second highest after carbon dioxide, and it is considered that methane emitted from ruminants accounts for 15 to 20% of the total emission of methane.
• the antibiotic exhibits an action of promoting the growth by its effects of (1) prevention of pathogenic bacterial infection of a domestic animal, (2) improvement in metabolism, and (3) suppression of proliferation of harmful enterobacteria, but the details thereof are still unclear.
• the antibiotics are distributed widely in the environment, and accordingly, an appearance of antibiotic-resistant bacteria has become a social problem.
• the addition of an antibiotic to a feed has been regulated strictly, and in Europe, the use of the antibiotic for promoting the growth was banned by January 2006. Further, there is a strong demand from producers for livestock products that are bred without using an antibiotic, and hence, the need of an alternative to the antibiotic is growing.
• Ionophores such as monensin, which are antibiotics, are widely used in a feed for a ruminant.
• Monensin exhibits a selective suppressing effect with respect to a rumen microorganism and has, as a result, functions of reducing methane production and promoting propionic acid production.
• Propionic acid has higher ATP production efficiency compared with other volatile fatty acids, and hence, feed efficiency is improved owing to the promotion of propionic acid production.
• Non-patent Document 1 an oil extracted from a plant
• Non-patent Document 2 a vaccine against lactic acid-producing bacteria
• Non-patent Document 3 an egg yolk antibody against lactic acid-producing bacteria
• Patent Document 1 gluconic acid
• Non-patent Document 4 cashew nut shell liquid has an antibacterial action (Non-patent Document 4) and a coccidiosis-relieving action (Patent Document 2). Further, as for the rumen function-improving effects of a ruminant, an in vitro test result using anacardic acid (Non-patent Document 5) is reported, but there is no disclosure on the reproducibility, application, and the optimum content on an actual animal.
• Patent Document 1 WO 01/028551
• Patent Document 2 JP 08-231410 A
• Non-patent Document 1 Benchaar et al., Can. J. Anim. Sci. 86, 91-96 (2006)
• Non-patent Document 2 Shu et al., FEMS Immunology & Medical Microbiology, 26(2), 153-158 (1999)
• Non-patent Document 3 DiLorenzo et al., J. Anim. Sci., 84, 2178-2185 (2006)
• Non-patent Document 4 Muroi, H. et al., Bioorganic &Medicinal Chemistry 12, 583-587 (2004)
• Non-patent Document 5 Van Nevel C. J., et al., Applied Microbiology 21, 365-366 (1971)
• An object of the present invention is to promote the growth of a ruminant and to improve feed efficiency by improving the rumen fermentation in the ruminant and contributing to suppressing the generation of greenhouse gas.
• the inventors of the present invention have intensively studied in order to solve the above problems, and as a result, the inventors have found that a feed containing cashew nut shell liquid suppresses methane production and promotes propionic acid production in a rumen. Thus, the present invention has been accomplished.
• the present invention is as follows:
• a rumen fermentation improving agent comprising cashew nut shell liquid.
• composition for a feed for improving rumen fermentation comprising the rumen fermentation improving agent according to (1).
• a feed for improving rumen fermentation comprising the composition for a feed for improving rumen fermentation according to (2).
• a composition for a feed for improving rumen fermentation comprising cashew nut shell liquid.
• a feed for improving rumen fermentation comprising cashew nut shell liquid.
• a method of breeding a ruminant comprising allowing the ruminant to ingest the feed for improving rumen fermentation according to any one of (3), (5), and (6).
• a method of improving rumen fermentation of a domestic animal comprising administering cashew nut shell liquid to the domestic animal.
• the feed of the present invention may be preferably used for breeding ruminants such as cattle, goats, and sheep.
• a rumen fermentation improving agent of the present invention includes cashew nut shell liquid (CNSL).
• rumen fermentation-improving effects include a methane production-suppressing effect and a propionic acid production-promoting effect in a rumen.
• the cashew nut shell liquid to be used in the present invention is an oily liquid contained in the shell of the seed of a cashew nut tree ( Anacardium occidentale L.).
• the cashew nut shell liquid contains, as the components thereof, anacardic acids, cardanol, and cardol.
• cashew nut shell liquid in which anacardic acids are contained at a ratio of 40 mass % or more is preferred, and cashew nut shell liquid in which anacardic acids are contained at a ratio of 50 mass % or more is more preferred.
• anacardic acids there are three kinds of anacardic acids: an anacardic acid having three double bonds at 8-, 11-, and 14-positions (hereinafter, referred to as 15:3); an anacardic acid having two double bonds at 8- and 11-positions (hereinafter, referred to as 15:2); and an anacardic acid having one double bond at 8-position (hereinafter, referred to as 15:1).
• a ratio of (15:1):(15:2):(15:3) is preferably 80 to 100:85 to 120:140 to 180 and more preferably 90 to 95:100 to 110:150 to 160.
• the cashew nut shell liquid obtained by squeezing oil from cashew nut shells is preferred from the viewpoint that the production cost can be reduced.
• a ratio of the above-mentioned anacardic acids, cardanol, and cardol is preferably 50 to 80:1 to 30:5 to 40 from the viewpoint of the rumen function-improving effects, and is more preferably 55 to 65:5 to 20:10 to 30.
• the anacardic acids, cardanol, and cardol each have an antioxidant action, and thus it is considered that these components suppress the oxidation of each other. Therefore, the rumen fermentation improving agent of the present invention containing cashew nut shell liquid can exhibit rumen fermentation-improving effects more stably than by using anacardic acids, cardanol, or cardol alone, each having double bond(s) to be oxidized easily.
• the cashew nut shell liquid can be obtained by heating, but in the present invention, it is preferred that the cashew nut shell liquid be extracted under unheated conditions in order to prevent anacardic acids, which are main constituent components, from being denatured by heat.
• the cashew nut shell liquid can be obtained by an extracting method involving compressing the shell of a cashew nut or a method described in JP 08-231410 A.
• the cashew nut shell liquid used in the present invention may also be a liquid obtained by pulverizing/crushing the shell of a cashew nut.
• the cashew nut shell liquid used in the present invention is preferably unheated cashew nut shell liquid from the viewpoint of the stability of active ingredients.
• the content of the cashew nut shell liquid in the rumen fermentation improving agent of the present invention is, from the viewpoints of effects and costs, preferably 1 mass % to 100 mass %, more preferably 5 mass % to 90 mass %, and still more preferably 10 mass % to 80 mass %, with respect to a total amount of the rumen fermentation improving agent.
• the content is 1 mass % or more, the rumen fermentation effect can be exhibited effectively with a certain amount of the rumen fermentation improving agent.
• a stock solution of cashew nut shell liquid may be directly orally administered.
• the rumen fermentation improving agent of the present invention may further contain, in addition to the cashew nut shell liquid, an arbitrary component(s) such as a component which is effective for the growth promotion of a ruminant, a nutritional supplement component, a component for enhancing the preservation stability.
• an arbitrary component(s) such as a component which is effective for the growth promotion of a ruminant, a nutritional supplement component, a component for enhancing the preservation stability.
• Examples of the arbitrary components include the followings: probiotics such as Enterococcus, Bacillus , and Bifidus ; enzymes such as amylase and lipase; vitamins such as L-ascorbic acid, choline chloride, inositol, and folate; minerals such as potassium chloride, iron citrate, magnesium oxide, and phosphates; amino acids such as DL-alanine, DL-methionine, L-lysine; organic acids such as fumaric acid, butyric acid, lactic acid, acetic acid, and their salts; antioxidants such as ethoxyquin, dibutylhydroxytoluene, butylhydroxy anisole, ferulic acid, vitamine C, and vitamine E; fungicides such as calcium propionate; binders such as carboxylmethyl cellurose (CMC), casein sodium, and sodium polyacrylate; emulsifiers such as lecithin, glycerin fatty acid ester and sorbit
• the formulation of the rumen fermentation improving agent of the present invention is not particularly limited, and the agent may be in an arbitrary form such as powder, liquid, solid, a tablet, a capsule, or emulsion.
• the rumen fermentation improving agent of the present invention can be produced by mixing cashew nut shell liquid and, if required, an arbitrary component, and forming the mixture into a preparation. Note that, depending on the form of the formulation, the pulverized/crushed product of the above-mentioned cashew nut shell or the cashew nut shell as it is without being subjected to any treatment is mixed with another arbitrary component, and the mixture can be used as the rumen fermentation improving agent of the present invention.
• the pulverized/crushed product as it is or the cashew nut shell as it is may be used as the rumen fermentation improving agent, and the rumen fermentation improving agent itself may be used as a composition for a feed or a feed.
• the composition for a feed of the present invention includes cashew nut shell liquid. Further, the composition for a feed of the present invention may also include the rumen fermentation improving agent.
• the content of the cashew nut shell liquid in the composition for a feed of the present invention is, from the viewpoints of effects and costs, preferably 0.5 to 500,000 mass ppm, more preferably 5 to 100,000 mass ppm, and still more preferably 50 to 50,000 mass ppm with respect to a dry mass of the composition for a feed.
• the composition for a feed of the present invention is mixed with another feed component used in pet foods and supplements for pets (hereinafter referred to as feed), to thereby produce a feed.
• feed is preferably for ruminants.
• the feed of the present invention includes cashew nut shell liquid. Further, the feed of the present invention may also include the composition for a feed.
• the content of the cashew nut shell liquid in the feed of the present invention is, from the viewpoints of effects and costs, preferably 0.5 to 50,000 mass ppm, more preferably 5 to 10,000 mass ppm, and still more preferably 50 to 5,000 mass ppm with respect to a dry mass of the feed. It should be noted that, in the rumen juice of an actual ruminant, it is considered that the cashew nut shell liquid is diluted about 10 fold, and hence, it is suggested that the cashew nut shell liquid be administered about 10 times the content of the effective content in vitro, in the case of being used in vivo.
• the feed of the present invention can be produced by adding cashew nut shell liquid or a composition for a feed including the cashew nut shell liquid as it is to a feed component and mixing the resultant.
• a powdery or solid composition for a feed when used, the form of the composition for a feed may be modified into a liquid form or a gel form for the purpose of facilitating the mixing process.
• the following may be used as a liquid carrier: water; a vegetable oil such as soybean oil, rapeseed oil, or corn oil; or a water-soluble polymer compound such as a liquid animal oil, polyvinylalcohol, polyvinylpyrrolidone, or polyacrylic acid.
• the feed also preferably contains alginic acid, sodium alginate, xanthan gum, casein sodium, gum arabic, guar gum, or water-soluble polysaccharides such as tamarind seed polysaccharide.
• the species of animals that ingest the feed of the present invention is preferably ruminants.
• the feed of the present invention is suitable for breeding, for example, ruminants such as cows, goats, and sheep.
• the amount of feed ingested by an animal may be appropriately adjusted depending on the animal's species, body weight, age, sex, health condition, feed component, etc.
• the amount of cashew nut shell liquid contained in the feed is preferably 0.005 to 500 g per ruminant per day, more preferably 0.5 to 100 g per ruminant per day, and still more preferably 0.5 to 50 g per ruminant per day.
• Any method usually used may be adopted as a method of feeding animals and a method of breeding animals depending on the species of animals.
• Cashew nut shell liquid which was extracted by compressing cashew nut shells, was obtained from Cashew Trading Co., Ltd.
• rumen juice quadple gauze filtrate collected from a Holstein cow (fitted with rumen cannula) owned by Experiment Farm, Field Science Center for Northern Biosphere, Hokkaido University.
• the inoculum was diluted two fold with McDougal's artificial saliva (pH 6.8) and used.
• the culture was performed in such a manner that the concentration of CNSL in a test culture medium was 500 mg/L.
• 0.05 g of CNSL was dissolved in 1 ml of ethanol, and 100 ⁇ l of the solution was added to a Hungate tube. Ethanol was volatilized by leaving the resultant standing for several hours. Then, as a culture substrate, added therein were 0.15 g of corn starch, 0.025 g of blended feed powder, and 0.025 g of powdered orchard grass hay.
• Treatments include an additive-free (ethanol only: control) zone and a CNSL zone, and the culture was performed in quintuplicate in each zone.
• Methane, hydrogen, and carbon dioxide were analyzed by a TCD gas chromatography.
• concentration and composition of total volatile fatty acids (VFA) were determined by FID gas chromatography.
• Table 1 shows the results of gas production.
• Table 2 shows the results of the production of VFA.
• VFA concentration was not changed by adding CNSL, and thus there was no suppression of fermentation.
• the fermentation pattern changed remarkably, acetic acid production and butyric acid production decreased significantly, and propionic acid production increased significantly.
• CNSL cerevisiae NBRC10217 strain.
• Staphylococcos aureus strain isolated from a bovine Streptococcus bovis DSM20065 strain
• Bacillus subtilis NBRC3009 strain Escherichia coli ATCC11303 strain
• Pseudomonas aeruginosa NBRC12689 strain Pseudomonas aeruginosa NBRC12689 strain
• Saccharomyces cerevisiae NBRC10217 strain Saccharomyces cerevisiae NBRC10217 strain.
• MIC minimum growth-inhibitory concentration
• CNSL does not have an antibacterial action against Gram-negative bacteria, while CNSL has a high antibacterial action against Gram-positive bacteria. That is, CNSL has a selective antimicrobial action against rumen microorganisms.
• Cashew nut shell liquid which was extracted by compressing cashew nut shells, was obtained from Cashew Trading Co., Ltd.
• rumen juice quadple gauze filtrate collected from a Holstein cow (fitted with rumen cannula) owned by Experiment Farm, Field Science Center for Northern Biosphere, Hokkaido University.
• the inoculum was diluted two fold with McDougal's artificial saliva (pH 6.8) and used.
• the culture was performed in such a manner that the concentrations of CNSL in test culture media were 50, 100, 250, and 500 mg/L.
• CNSL was dissolved in 1 ml of ethanol, and 100 ml of the solution was added to a Hungate tube. Ethanol was volatilized by leaving the resultant standing for several hours. Then, as a culture substrate, added therein were 0.15 g of corn starch, 0.025 g of blended feed powder, and 0.025 g of powdered orchard grass hay.
• Treatments include an additive-free (ethanol only: control) zone and a CNSL zone, and the culture was performed in quintuplicate in each zone.
• Cashew nut shell liquid (CNSL), which was extracted by compressing cashew nut shells, was obtained from Cashew Trading Co., Ltd.
• rumen juice quadromeple gauze filtrate collected from a Holstein cow (fitted with rumen cannula) owned by Experiment Farm, Field Science Center for Northern Biosphere, Hokkaido University.
• CNSL was added to the feed in such a manner that the concentrations of CNSL in culture media were 0, 50, 100, and 200 mg/L, and the culture was performed in duplicate in each culture media.
• the culture period was 21 days. The culture was performed under dark conditions at all times.
• Table 5 shows the amount (ml) of collected gas.
• the amount of methane was decreased by adding CNSL.
• Table 6 shows the concentration (mmol/dl) of total volatile fatty acids (VFA) in the collected rumen juice.
• the total VFA concentration was not changed by adding CNSL (i.e. there is no suppression of fermentation).
• Table 7 shows the molar ratio (%) of acetic acid in the collected rumen juice
• Table 8 shows the molar ratio (%) of propionic acid in the collected rumen juice
• Table 9 shows the molar ratio (%) of butyric acid in the collected rumen juice.
• a first sampling of rumen contents was performed before starting the administration of CNSL.
• rumen function-improving effects were observed with the addition of 100 mg/L or more of CNSL in the test in vitro.
• concentration of CNSL in the rumen juice of the sheep it is required to mix 0.14 to 0.28 mass % (1,400 to 2,800 mass ppm) of CNSL into the feed, because CNSL is diluted in the rumen juice. Accordingly, 0.14 mass % of CNSL was added to the feed for the first two weeks and the sampling of rumen contents was performed once a week, i.e., twice in total.
• 0.28 mass % of CNSL was added to the feed for the next two weeks and the sampling of rumen contents was performed once a week, i.e., twice in total.
• the sampling of rumen contents was performed once a week, i.e., twice in total.
• Table 10 shows the amount of the produced gas (ml/day/tube) when the collected rumen juice was sealed in a test tube and cultured at 37° C. for 24 hours.
• the amount of methane was decreased significantly by adding CNSL.
• the accumulation of hydrogen accompanied by the decrease in methane was not observed, and hence, it is considered that hydrogen produced in anaerobic fermentation was smoothly transferred to an alternative hydrogen consuming system.
• Table 11 shows the total VFA concentration (mmol/dl), the molar ratio (%) of acetic acid, the molar ratio (%) of propionic acid, the molar ratio (%) of butyric acid in the collected rumen juice.
• the total VFA concentration was not changed by adding CNSL in an amount of 0.14 mass % (i.e. there is no suppression of fermentation). Further, with the addition of CNSL in an amount of 0.28 mass %, the fermentation pattern changed remarkably, acetic acid production decreased significantly, and propionic acid production increased significantly.
• Table 12 shows the ammonia concentration (mgN/dl) in the collected rumen juice.
• Example 5 The results in vitro obtained in Examples 1 to 4 correlated well with the results obtained in Example 5, which used sheep. That is, in an actual rumen, with the addition of CNSL, carbon dioxide and methane decreased significantly, and because the accumulation of hydrogen accompanied by the decrease in methane was not observed at that time, it is considered that hydrogen produced in anaerobic fermentation was smoothly transferred to an alternative hydrogen consuming system. Further, the concentration of total volatile fatty acids was not changed by adding CNSL (i.e. there is no suppression of fermentation). However, the fermentation pattern changed remarkably, acetic acid production decreased significantly, and propionic acid production increased significantly.
• Methane produced by cattle is a loss of feed energy and is also a greenhouse gas, and therefore, it is an urgent issue to reduce methane production from cattle from the viewpoints of zootechnical science and environmentology.
• methane production can be suppressed.
• propionic acid has the highest transformation efficiency of feed hexose energy among the volatile fatty acids and is an original substance of sugar to be changed into glucose after absorption, and hence, promotion of propionic acid production leads to saving of other original substances of sugar (e.g., amino acid).
• the feed containing cashew nut shell liquid can enhance the utilization efficiencies of energy and protein in domestic animals.

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