JP2012025773A - Lipase inhibitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To find out substances having an excellent lipase inhibiting action among natural products whose safety has been confirmed, and to provide a new lipase inhibitor comprising the same as active ingredients.SOLUTION: As the effective ingredients of the lipase inhibitor, one or more kinds of extracts selected from the group consisting of a Medicago sativa extract, an Ilex latifolia extract, a Lonicerae japonica extract, a Mentha piperita extract, a Syzygium aromaticum extract, a Hedera helix extract, an Olea europaea extract and an Apocynum venetum extract are incorporated.

Description

  The present invention relates to a novel lipase inhibitor. In more detail, through the lipase inhibitory action, the occurrence of malodor caused by fats and oils present in the living environment such as food and drinks, cosmetics, daily goods, etc., and those that come into direct contact with skin such as cosmetics and daily goods The present invention relates to a lipase inhibitor useful for suppressing rough skin caused by oils and fats present and for suppressing obesity caused by oils and fats present in foods and drinks.

  Oils and fats contained in food and drink are hydrolyzed by lipases produced by microorganisms and the like present in the environment to produce glycerol and fatty acids. The resulting fatty acid is oxidized to produce aldehydes and the like, causing bad odor and deterioration, which is a big problem in maintaining the quality of food and drink.

  In the skin, fatty acids are produced from sebum by the action of lipase produced by microorganisms present in the skin or lipase from epidermal keratinocytes, and the resulting fatty acid activates neutrophils to activate them. The sphere releases active oxygen, which causes acne and dermatitis.

  On the other hand, lipase, which is a kind of digestive enzyme, promotes digestion and absorption by degrading fats and oils in food and drink that are eaten and consumed. Therefore, it is thought that obesity, hyperlipidemia, atherosclerosis and arteriosclerosis can be treated and prevented by inhibiting the action of lipase.

  Examples of lipase inhibitors that inhibit the activity of lipases that adversely affect foods and drinks, cosmetics, skin, etc. include, for example, lemongrass, allspice, cinnamon, cloves, asen, guava, medusait, cora Lipase inhibitors using extracts from plants such as de cavalo, loquat, dokkatsu, ryokyoko, betel palm, bay beetle, sun pens, katsumeshi have been proposed (see Patent Documents 1 to 5), but are effective and safe. At present, what has been satisfactory in terms of sex has not been developed yet.

JP 2001-120237 A JP 2000-103741 A Japanese Patent Laid-Open No. 11-228338 JP-A-10-265364 JP-A-5-255100

  Therefore, an object of the present invention is to find a substance having an excellent lipase inhibitory action from natural products whose safety has been confirmed, and to provide a novel lipase inhibitor containing the substance as an active ingredient.

  In order to achieve the above object, the lipase inhibitor provided by the present invention includes alfalfa extract, bitter tea extract, gold and silver flower extract, peppermint extract, clove extract, kizuta extract, olive extract. And one or more extracts selected from the group consisting of Rahuma tea extract as an active ingredient.

  In the lipase inhibitor of the present invention, the alfalfa extract is an extract obtained by extracting the stem and / or leaf of alfalfa with a polar solvent, and the bitter tea extract is a bitter tea extract. It is an extract obtained by extracting leaves with a polar solvent, and the gold-silver flower extract is an extract obtained by extracting flowers, leaves or stems of gold-silver flowers with a polar solvent, and the peppermint The extract is an extract obtained by extracting the above-ground part of peppermint with a polar solvent, and the clove extract is an extract obtained by extracting the buttocks of clove with a polar solvent, The product is an extract obtained by extracting stems and / or leaves of edible lizard with a polar solvent, and the olive extract is obtained by extracting olive leaves with a polar solvent. Is an extract, the Lafuma tea extract is preferably an extract obtained by extracting with a polar solvent leaf of Lafuma tea.

  The present invention provides a novel lipase inhibitor. According to the lipase inhibitor of the present invention, through the lipase inhibitory action, the decomposition of fats and oils contained in foods and drinks and cosmetics can be prevented, and the odor and deterioration of foods and drinks and cosmetics can be suppressed. Prevention / treatment of acne and dermatitis through inhibitory action, obesity, hyperlipidemia, atherosclerosis, arteriosclerosis etc. through lipase inhibitory action become possible. Moreover, since the lipase inhibitor of this invention has little bad influence with respect to flavor and feeling of use, such as food / beverage products and cosmetics used as an addition object, it can be used with respect to a wide range of addition object. Furthermore, since each plant body used as an extraction raw material of an active ingredient exists in large quantities in nature and can be stably supplied, the lipase inhibitor of the present invention can be produced at low cost.

  In the present invention, "alfalfa extract", "bitter tea extract", "gold and silver flower extract", "peppermint extract", "clove extract", "horse extract", "olive extract" For “Rafuma tea extract”, alfalfa, bitter tea, gold and silver flowers, peppermint, clove, Japanese kizuta, olive or Raffma tea plants (hereinafter sometimes simply referred to as “each plant”) are used as extraction raw materials. The obtained extract, a diluted solution or a concentrated solution of the extract, a dried product obtained by drying the extract, or a crude product or a purified product thereof are included.

  Alfalfa (scientific name: Medicago sativa) used as a raw material for extraction is also known as Murasaki sago palm (Lucerne in Europe) and is a perennial plant belonging to the leguminous family. The newly sprouted one is called alfalfa sprouts and is edible. Alfalfa is used as a feed all over the world, and in China it is used as a folk medicine to strengthen the internal organs and remove bladder stones. Alfalfa is cultivated all over the world and is readily available from these regions. As an extraction raw material, alfalfa stems, leaves, and the like can be used.

  The bitter green tea (scientific name: Ilex latifolia) used as the raw material for the extraction is also known as Tarayo, and is an evergreen Takagi plant belonging to the aceae family. In addition to being drunk as tea, bitter tea is used as a folk medicine for headaches, redness of the eyes, tinnitus, etc. Biting tea is native to the warmer areas of Japan and China and is readily available from these regions. As the raw material for extraction, leaf parts, branch parts, trunk parts, bark parts, etc. of bitter tea can be used, but it is preferable to use leaf parts.

  Gold and silver flowers (scientific name: Lonicera japonica or Lonicera lanceolata) used as an extraction raw material are also called honeysuckle, and are vine evergreen shrub plants belonging to the family Lonicera. In addition to being drunk as tea, gold and silver flowers are used as folk medicines such as colds and various inflammations. Gold and silver flowers are native to the temperate zones of Japan and China and are readily available from these regions. As an extraction raw material, a flower part, a leaf part, a stem part, etc. of a gold and silver flower can be used, but it is preferable to use a flower part.

  Peppermint (scientific name: Mentha piperita) used as an extraction raw material is also called alias mint and is a perennial herbaceous plant belonging to the family Lamiaceae. Peppermint is used edible raw or drunk as tea, and its extract is used for beverages, cocktails, gums and the like. Peppermint is cultivated in various parts of the world, such as Europe and the United States, and is readily available from these areas. As an extraction raw material, an above-ground part of peppermint can be used.

  Clove (Syzygium aromaticum) used as a raw material for extraction is also known as clove, and is an evergreen tree plant belonging to the Myrtaceae family. In addition to being used in large quantities as a spice, clove is also used for medicinal purposes such as dental antibacterial agents and gastric agents. Clove is cultivated in the tropics ranging from Asia to Africa and is readily available from regions such as Indonesia and East Africa. As a raw material for extraction, a butterfly of a clove can be used.

  Kizuta (scientific name: Hedera helix) used as a raw material for extraction is also known as Ivy, and is an evergreen vine that belongs to the family Argiaceae. Kizuta is used as a folk medicine for arthritis in China. Kizuta is native to Europe, Africa, Asia, etc. and is readily available from these regions. As a raw material for extraction, a stem portion, a leaf portion, or the like of edible ivy can be used.

  Olives (scientific name: Olea europaea) used as a raw material for extraction is an evergreen tree plant belonging to the family Asteraceae. Olive oil collected from fruits is used for food, medicine and cosmetics. Olives are cultivated in the Mediterranean coast and in Asia including China, and are easily available from these regions. As an extraction raw material, an olive leaf part, a branch part, a bark part or the like can be used, but it is preferable to use a leaf part.

  Raffma tea (scientific name: Apocynum venetum) used as an extraction raw material is a perennial herbaceous plant belonging to the family Oleander. Raffma tea is used as a tea, as well as a folk medicine for cold prevention, hypertension and insomnia. Rafuma tea grows naturally in Europe and other Asian countries, including China, and is easily available from these regions. As the raw material for extraction, the leaf portion of whole rahama tea, whole grass, and the like can be used.

  Each plant used as the raw material for extraction can be used as it is or after being dried, or as it is or after being pulverized by a pulverizer. Drying may be performed in the sun or using a commonly used dryer. Each plant used as an extraction raw material may be used after pretreatment such as degreasing with a nonpolar solvent such as hexane or benzene. By performing pretreatment such as degreasing, extraction treatment with a polar solvent of each plant can be performed efficiently.

  In the extraction process, it is preferable to use a polar solvent as the extraction solvent. Ingredients having a lipase inhibitory action contained in alfalfa, bitter tea, gold and silver flowers, peppermint, clove, black squirrel, olive or raffma tea can be easily extracted by extraction using a polar solvent as an extraction solvent.

  Specific examples of suitable polar solvents include water, hydrophilic organic solvents and the like, and these can be used alone or in combination of two or more at a temperature from room temperature to the boiling point of the solvent.

  The water that can be used as the extraction solvent in the present invention includes pure water, tap water, well water, mineral spring water, mineral water, hot spring water, spring water, fresh water, and the like, as well as those subjected to various treatments. Examples of the treatment applied to water include heating, sterilization, sterilization, filtration, ion exchange, adjustment of osmotic pressure, buffering, and the like. Accordingly, water that can be used as the extraction solvent in the present invention includes hot water, ion-exchanged water, physiological saline, phosphate buffer, phosphate buffered saline, and the like.

  Examples of the hydrophilic organic solvent that can be used as the extraction solvent in the present invention include lower alcohols having 1 to 5 carbon atoms such as methanol, ethanol, propylene alcohol, and isopropyl alcohol; lower aliphatic ketones such as acetone and methyl ethyl ketone; Examples thereof include polyhydric alcohols having 2 to 5 carbon atoms such as butylene glycol, propylene glycol, isopropylene glycol and glycerin.

  When using the liquid mixture of 2 or more types of polar solvents as an extraction solvent, the mixing ratio can be adjusted suitably. For example, when a mixed liquid of water and a hydrophilic organic solvent is used, if the hydrophilic organic solvent is a lower alcohol, 1 to 90 parts by weight with respect to 10 parts by weight of water, and the hydrophilic organic solvent is a lower aliphatic. It is preferable to mix 1 to 40 parts by weight with respect to 10 parts by weight of water if it is a ketone, and 10 to 90 parts by weight with respect to 10 parts by weight of water if the hydrophilic organic solvent is a polyhydric alcohol.

  The extraction treatment is not particularly limited as long as the soluble component contained in each plant can be eluted in the extraction solvent, and can be performed according to a conventional method. In the extraction process, it is not necessary to adopt a special extraction method, and any apparatus can be used at room temperature or under reflux heating.

  For example, the extraction raw material is put into a treatment tank filled with the extraction solvent, and the soluble components are eluted with occasional stirring. At this time, the extraction conditions can be appropriately adjusted according to the extraction raw material and the like. For example, when water is used as the extraction solvent, the amount of the extraction solvent is usually about 1 to 1000 times the weight of the extraction raw material (weight ratio), the extraction time is usually about 30 minutes to 2 hours, and the extraction temperature is usually 40 to 90 ° C. To the extent. When a mixed liquid of water and ethanol is used as the extraction solvent, the amount of the extraction solvent is usually about 1 to 100 times (weight ratio) of the extraction raw material, the extraction time is usually about 30 minutes to 2 hours, and the extraction temperature. Is usually about 40 to 80 ° C.

  An eluate can be obtained by eluting soluble components by extraction and then filtering to remove the extraction residue. The obtained extract is diluted, concentrated, dried, purified, etc. according to a conventional method in order to obtain a diluted or concentrated solution of the extract, a dried product of the extract, or a crude purified product or a purified product thereof. Processing may be performed.

  When purifying the obtained extract for the purpose of decolorization, deodorization, activity improvement, etc., the purification method is not particularly limited. Examples of the purification method include activated carbon treatment, resin adsorption treatment, ion exchange resin, liquid-liquid. Examples include counter-current distribution.

  Since the extracts from each plant have a unique odor and taste, it is possible to carry out purification for the purpose of decolorization, deodorization, etc. within a range that does not cause a decrease in the physiological activity. When added to food, it is not used in large quantities, so there is no practical problem even if it is not purified.

  The obtained extract can be used as it is as a lipase inhibitor, but it can also be used after being formulated according to a conventional method. In the case of formulating, a pharmaceutically acceptable carrier such as dextrin and cyclodextrin and other optional auxiliaries can be added to facilitate storage and handling. It can be made into any dosage form such as powder, granule, tablet, etc. by formulation. At the time of formulation, other substances having a lipase inhibitory action may be added as necessary.

  The lipase inhibitor may contain any one of the extracts from each plant as an active ingredient, or may contain two or more kinds as an active ingredient. When two or more kinds are contained as active ingredients, the content ratio is not particularly limited, and can be appropriately adjusted according to the strength of physiological activity of each extract.

  The lipase inhibitor of the present invention can efficiently inhibit lipase activity. Therefore, according to the lipase inhibitor of the present invention, through the lipase inhibitory action, the decomposition of fats and oils contained in foods and drinks and cosmetics can be prevented, and malodor and deterioration of foods and drinks and cosmetics can be suppressed In addition, prevention / treatment of acne and dermatitis through lipase inhibitory action, obesity, hyperlipidemia, atherosclerosis, arteriosclerosis etc. through lipase inhibitory action can be achieved.

  Since the lipase inhibitor of the present invention has little adverse effect on the flavor and feeling of use of the addition object, it can be used for a wide range of addition objects. The addition object of the lipase inhibitor of this invention is not specifically limited, As the specific example, food-drinks, cosmetics, oral preparations, etc. are mentioned. Specific examples of foods and drinks to be added include beverages such as soft drinks, carbonated drinks, nutritional drinks, fruit drinks, and lactic acid drinks (including concentrates and powders for preparation of these drinks); ice cream, ice sherbet, shaved ice Frozen confectionery such as soba noodles, udon, harusame, gyoza rind, shumai rind, Chinese noodles, instant noodles, and other noodles; Fish and fishery processed foods such as kamaboko, ham and sausage; Dairy products such as processed milk and fermented milk; Fats and oils and fats processed foods such as salad oil, tempura oil, margarine, mayonnaise, shortening, whipped cream, dressing; sauce; Seasonings such as sauce; health and nutritional supplements in various forms such as tablets and granules; other soups, shii -Menu, salads, prepared foods, pickles, and examples of the cosmetics to be added subject, ointments, creams, milks, lotions, skin cosmetics such as packs and the like.

  The amount of lipase inhibitor added to foods and beverages and cosmetics can be adjusted as appropriate depending on the type of foods and beverages and cosmetics, the physiological activity of the extract, etc. In the case of food and drink, it is usually about 0.01 to 10% by weight, and in the case of cosmetics, it is usually about 0.001 to 5% by weight.

  EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated concretely, this invention is not limited to the following Example.

[Production Example 1]
50 wt% ethanol (1000 ml) was added to the alfalfa stems and leaves (100 g), and the mixture was extracted with a reflux condenser at 80 ° C. for 2 hours, followed by filtration with filter paper to obtain an extract. The obtained extract was concentrated and dried under reduced pressure to obtain 20.8 g (powder) of alfalfa extract (yield 20.8%).

[Production Example 2]
Water (1000 ml) was added to the leaf part (100 g) of the bitter tea, and the mixture was extracted for 2 hours at 90 ° C. using a reflux condenser, followed by filtration with filter paper to obtain an extract. The obtained extract was concentrated and dried under reduced pressure to obtain 30.1 g (powder) of bitter tea extract (yield 30.1%).

[Production Example 3]
50 wt% ethanol (1000 ml) was added to the flower part (100 g) of gold and silver flowers (Lonicera japonica), extracted with a reflux condenser at 80 ° C. for 2 hours, filtered through filter paper, and extracted liquid Got. The obtained extract was concentrated and dried under reduced pressure to obtain 35.2 g (powder) of gold and silver flower extract (yield 35.2%).

[Production Example 4]
70 wt% acetone (1000 ml) was added to the above-ground part (100 g) of peppermint (Mentha piperita), extracted with a reflux condenser at 80 ° C for 2 hours, filtered through filter paper, Obtained. The obtained extract was concentrated and dried under reduced pressure to obtain 15.3 g (powder) of peppermint extract (yield 15.3%).

[Production Example 5]
Ethanol (1000 ml) was added to the buttocks (100 g) of clove (Syzygium aromaticum), extracted at 80 ° C. for 2 hours using a reflux condenser, and then filtered through filter paper to obtain an extract. The obtained extract was concentrated and dried under reduced pressure to obtain 12.1 g (powder) of clove extract (yield 12.1%).

[Production Example 6]
50% by weight ethanol (1000 ml) was added to the stems and leaves (100 g) of Hedera helix, extracted with a reflux condenser at 80 ° C. for 2 hours, filtered through filter paper, and extracted liquid. Got. The obtained extract was concentrated and dried under reduced pressure to obtain 25.7 g (powder) of a kizuta extract (yield 25.7%).

[Production Example 7]
70% by weight acetone (1000 ml) was added to the olive leaf part (100 g), followed by extraction at 80 ° C. for 2 hours using a reflux condenser, followed by filtration through filter paper to obtain an extract. The obtained extract was concentrated and dried under reduced pressure to obtain 33.2 g (powder) of olive extract (yield 33.2%).

[Production Example 8]
Water (1000 ml) was added to the leaf portion (100 g) of Raffma tea, extracted at 80 ° C. for 2 hours using a reflux condenser, and then filtered through filter paper to obtain an extract. The obtained extract was concentrated and dried under reduced pressure to obtain 29.8 g (powder) of Rahuma tea extract (yield 29.8%).

[Examples 1-8]
Alfalfa extract of Production Example 1 (Example 1), bitter tea extract of Production Example 2 (Example 2), gold and silver flower extract of Production Example 3 (Example 3), peppermint extract of Production Example 4 ( Example 4), Clove extract of Production Example 5 (Example 5), Kizutha Extract of Production Example 6 (Example 6), Olive Extract of Production Example 7 (Example 7), Ruffa of Production Example 8 Sample solutions with a sample concentration of 62.5 μg / ml to 10.0 mg / ml were prepared by dissolving and diluting the tea extract (Example 8) with 50 wt% ethanol, respectively.
50 μl of each sample solution obtained, 50 μl of lipase (Candida cylindracea origin, Biocatalysts; 15.4 U / mL), 5,5′-dithiobis (2-nitro-) dissolved in 0.1 M Tris-HCl buffer (pH 8.5) benzoic acid) (DTNB, 0.1 mg / mL) 340 μl and phenylmethylsulfonyl fluoride (PMSF, 3.5 mg / mL) 10 μl dissolved in ethanol were mixed well and allowed to stand at 30 ° C. for 5 minutes. 25 μl each of 2,3-dimercapto-1-propanol tributylate (BALB, 0.3 mg / mL) and sodium dodecylsulfate (SDS, 0.26 mg / mL) dissolved in ethanol were added to the enzyme reaction solution at 30 ° C. The reaction was allowed for 30 minutes. After the enzyme reaction was stopped by adding 500 μl of acetone, the absorbance at a wavelength of 414 nm proportional to the amount of hydrolysis of BALB was measured. As a control, the same operation and absorbance measurement were performed when 50 wt% ethanol was added instead of the sample solution.
From the measurement results, the lipase activity inhibition rate was calculated by the following formula.

[Formula 1]
Lipase activity inhibition rate (%) = 1-[(A1-A0) / (A3-A2)] × 100

  In Formula 1, “A0” is the absorbance when the sample solution is added (before starting the enzyme reaction), “A1” is the absorbance when the sample solution is added (after starting the enzyme reaction), and “A2” is the control. Absorbance (before the start of enzyme reaction), “A3” represents the absorbance of the control (after the start of enzyme reaction).

The lipase activity inhibition rate is measured by changing the sample concentration of the sample solution stepwise to 6.25 to 1000 μg / ml, and the sample concentration (IC ₅₀ ) (μg / mL) of the sample solution at which the inhibition rate becomes 50%. ) was determined to, _{IC 50} in examples 1-8 were respectively 190,170,280,170,210,340,230,150 (μg / mL).

  From these results, it was confirmed that alfalfa extract, bitter tea extract, gold and silver flower extract, peppermint extract, clove extract, kizuta extract, olive extract, and rafma tea extract have lipase inhibitory action. It was. Moreover, it was confirmed that the strength of the lipase inhibitory action of each extract can be adjusted by the concentration of the extract.

Claims (2)

  A lipase inhibitor comprising, as an active ingredient, one or more extracts selected from the group consisting of bitter tea extract, gold and silver flower extract, peppermint extract and olive extract.   The bitter tea extract is an extract obtained by extracting the leaf part of bitter tea with a polar solvent, and the gold-silver flower extract is a flower part, leaf part or stem part of the gold-silver flower with a polar solvent. An extract obtained by extraction, wherein the peppermint extract is an extract obtained by extracting the above-ground part of peppermint with a polar solvent, and the olive extract extracts an olive leaf part with a polar solvent. The lipase inhibitor according to claim 1, wherein the lipase inhibitor is obtained.