KR20150057918A - Composition for skin whitening - Google Patents

Abstract

The present invention relates to a composition for skin whitening. According to the present invention, stevioside shows whitening effect by inhibiting synthesis of melanin of skin, thereby being used as a pharmaceutical composition and a cosmetic composition.

Description

Composition for skin whitening [

The present invention relates to a composition for whitening skin.

It is a common desire to have white skin. The color or brightness of the skin is genetically determined by the concentration and distribution of melanin in the human skin but is also influenced by environmental or physiological conditions such as sunlight, fatigue or stress. Melanin is produced by a nonenzymatic oxidation reaction in which tyrosine, an amino acid, is catalyzed by an enzyme called tyrosinase, which is subsequently converted to dopa (DOPA) and dopaquinone. The pathway for the formation of melanin is known, but the mechanism by which the melanin synthesis induces tyrosinase is not yet elucidated.

On the other hand, commonly known whitening ingredients include substances inhibiting the activity of tyrosinase enzymes such as kojic acid or arbutin, hydroquinone, vitamin C (L-ascorbic acid) There are plant extracts. By inhibiting the synthesis of melanin pigment, they can brighten the skin tone to realize skin whitening, and it is possible to improve skin hypercholesterolemia such as stain or freckles due to ultraviolet rays, hormones or heredity. However, when applied to skin, there is a problem that the use amount is limited due to safety problems such as irritation and redness, or the effect is insignificant, so that a practical effect can not be expected.

Therefore, it is urgently required to develop a composition which is safe in living body, stable in its effective component, and more effective than a substance having an existing whitening effect, among other things.

Thus, the present inventors confirmed that stevioside inhibited melanin synthesis and showed a whitening effect, thereby completing the present invention.

Accordingly, an object of the present invention is to provide a skin whitening composition comprising a compound represented by the following formula (1) as an active ingredient:

[Chemical Formula 1]

As means for solving the above problems,

There is provided a pharmaceutical composition for skin whitening comprising a compound represented by the following general formula (1) as an active ingredient.

[Chemical Formula 1]

As another means for solving the above problems,

A cosmetic composition for skin whitening comprising a compound represented by the following formula (1) as an active ingredient.

[Chemical Formula 1]

Stevioside according to the present invention inhibits the melanin synthesis of the skin to exhibit a whitening effect and thus can be used for medicines and cosmetics.

Hereinafter, the configuration of the present invention will be described in detail.

In order to exert an excellent effect when the whitening ingredient is applied to the actual skin, it exhibits a high activity whitening activity at a low concentration, has an excellent ability to permeate and absorb the skin, has a low volatility so that it can stay for a sufficient time to exhibit a whitening effect, It is preferable that the active ingredient remains stable on the composition or on the skin, is easy to be formulated into medicines or cosmetics, and is safe for the skin. However, the components satisfying all of the above-mentioned characteristics among the known components are not common. For example, some whitening ingredients are excellent in whitening activity even at a low concentration in an in vitro test, but they are difficult to be applied to real skin because of their ability to be absorbed through the skin. Other active ingredients have low hydrophilicity and are difficult to formulate into medicines or cosmetics. In addition, some of the whitening ingredients may be degraded or transformed into other compounds when exposed to heat, light, or oxygen, and the effects may already be lost before application to the skin.

As can be seen in the following examples, stevioside exhibits remarkably excellent whitening effect at a low concentration, so it can be used as an effective ingredient for medicines and cosmetics for skin whitening.

Accordingly, the present invention provides a pharmaceutical composition for skin whitening comprising a compound represented by the following general formula (1) as an active ingredient.

[Chemical Formula 1]

The compound of formula (1) may be isolated from or synthesized from plant extracts, or a commercially available compound may be used.

The pharmaceutical composition for skin whitening of the present invention may contain the compound of Formula 1 in the form of a glycoside, a non-glycoside, or a pharmaceutically acceptable salt of the compound of Formula 1.

The pharmaceutically acceptable salt of the compound of Formula 1 may be an acid addition salt formed using an organic acid or an inorganic acid, and the organic acid may be, for example, formic acid, acetic acid, propionic acid, lactic acid, butyric acid, isobutyric acid, trifluoroacetic acid The organic acid may be selected from the group consisting of hydrochloric acid, hydrobromic acid, hydrochloric acid, hydrobromic acid, hydrobromic acid, hydrobromic acid, hydrobromic acid, hydrobromic acid, malic acid, maleic acid, malonic acid, fumaric acid, succinic acid, monoamide, glutamic acid, tartaric acid, oxalic acid, citric acid, glycolic acid, glucuronic acid, , Benzenesulfonic acid, p-toluenesulfonic acid and methanesulfonic acid-based salts, and the inorganic acid includes, for example, hydrochloric acid, bromic acid, sulfuric acid, phosphoric acid, nitric acid, carbonic acid and boric acid-based salts. Preferably in the hydrochloride or acetate form, more preferably in the hydrochloride form.

The above-mentioned acid addition salts may be obtained by a) directly mixing the compound of formula 1 and an acid, or b) dissolving and mixing one of them in a solvent or a water solvent, or c) Lt; RTI ID = 0.0 > acid < / RTI > in a solvent and mixing them.

In addition to the above, additionally saltable forms include, but are not limited to, the salts of gabapentin, pregabalin, nicotinate, adipate, hemimarate, cysteine, acetylcysteine, methionine, arginine, Aspartate and the like.

When the compound of Chemical Formula 1 of the present invention is used as a medicine, it may further contain one or more active ingredients showing the same or similar functions. For example, a known skin whitening component may be included. The addition of an additional skin whitening ingredient may further enhance the skin whitening effect of the composition of the present invention. When the above ingredients are added, skin safety, easiness of formulation, and stability of effective ingredients can be considered according to the combined use. In one embodiment of the present invention, the composition is a whitening ingredient known in the art and includes substances inhibiting tyrosinase enzyme activity such as kojic acid, arbutin, etc., hydroquinone, vitamin C (L-Ascorbic acid), derivatives thereof, and various plant extracts. The additional component may be included in an amount of 0.0001 to 10% by weight based on the total weight of the composition, and the content range may be adjusted according to requirements such as skin safety, ease of formulation of the compound of Formula 1 .

In addition, the pharmaceutical composition for skin whitening of the present invention may further comprise a pharmaceutically acceptable carrier.

Pharmaceutically acceptable carriers may contain a variety of ingredients such as buffer, injectable sterile water, normal saline or phosphate buffered saline, sucrose, histidine, salts and polysorbates.

The pharmaceutical composition of the present invention can be administered orally or parenterally, and can be administered in the form of a general pharmaceutical preparation, for example, various forms of oral and parenteral administration at the time of clinical administration. In the case of formulation, , An extender, a binder, a wetting agent, a disintegrant, a surfactant, and the like.

Solid formulations for oral administration include tablets, pills, powders, granules, capsules and the like, which may be prepared by mixing the pharmaceutical composition of the present invention with at least one excipient such as starch, calcium carbonate, Sucrose, lactose, gelatin, and the like.

In addition to simple excipients, lubricants such as magnesium stearate talc are also used. Examples of liquid formulations for oral administration include suspensions, solutions, emulsions, syrups and the like. Various excipients such as wetting agents, sweeteners, fragrances, preservatives and the like may be included in addition to water and liquid paraffin, which are simple diluents commonly used.

Formulations for parenteral administration include sterilized aqueous solutions, non-aqueous solutions, suspensions, emulsions, freeze-dried preparations, and suppositories. Propylene glycol, polyethylene glycol, vegetable oil such as olive oil, injectable ester such as ethyl oleate, and the like can be used as the non-aqueous solvent and suspension agent. Examples of the suppository base include witepsol, macrogol, tween 61, cacao butter, laurin, glycerogelatin and the like.

In the present invention, the term " whitening effect "refers to not only brightening the skin tone by inhibiting the synthesis of melanin pigment but also improving skin hypercholesterolemia due to ultraviolet rays, hormones or heredity, such as spots or freckles.

The pharmaceutical composition of the present invention can provide a desired whitening effect when an effective amount of the compound of Formula 1 is included. In the present invention, the term "effective amount" means the amount of a compound capable of exhibiting a skin whitening effect. An effective amount of the compound of formula (1) contained in the composition of the present invention will vary depending on the form in which the composition is commercialized, how the compound is applied to the skin, and the time on the skin. For example, when the composition is commercialized as a pharmaceutical product, the compound of Formula 1 may be contained at a higher concentration than that of a cosmetic product that is routinely applied to skin.

The pharmaceutical composition of the present invention may be used alone or in combination with other methods for achieving the intended use.

The present invention can also be provided as a formulation of a whitening external preparation for skin comprising the compound of Formula 1 as an active ingredient.

When the compound of formula (1) is used as an external preparation for skin, it may further contain at least one selected from the group consisting of fatty substances, organic solvents, solubilizers, thickeners and gelling agents, softening agents, suspending agents, stabilizing agents, foaming agents, For example, those conventionally used in ionic or nonionic emulsifiers, fillers, sequestering and chelating agents, preservatives, vitamins, blockers, wetting agents, essential oils, dyes, pigments, hydrophilic or lipophilic active agents, And may contain adjuvants conventionally used in the field of dermatology, such as any other ingredient. The components can also be introduced in amounts commonly used in the field of dermatology.

When the compound of Formula 1 is provided as an external preparation for skin, it may have a formulation such as, but not limited to, ointments, patches, gels, creams or sprays.

The present invention can also be provided as a formulation of a whitening cosmetic composition containing the compound of Formula 1 as an active ingredient.

When the compound of Chemical Formula 1 is used as a cosmetic, the cosmetic product containing the compound of Chemical Formula 1 as an active ingredient may be prepared in the form of a general emulsified formulation and a solubilized formulation. For example, creams, essences, cosmetic creams, sprays, gels, packs, sunscreens, make-up bases, liquids such as lotions such as lotion, facial lotion, body lotion, A powder, a cleansing lotion, a makeup removing agent such as a cleansing oil, a cleaning agent such as a cleansing foam, a soap, a body wash and the like.

The cosmetic composition may further contain, in addition to the compound of Formula 1, a lipid, an organic solvent, a solubilizing agent, a thickening agent and a gelling agent, a softening agent, an antioxidant, a suspending agent, a stabilizer, a foaming agent, a fragrance, , Ionic or nonionic emulsifiers, fillers, sequestering and chelating agents, preservatives, vitamins, barrier agents, wetting agents, essential oils, dyes, pigments, hydrophilic or lipophilic active agents, lipid vesicles or cosmetics And may contain adjuvants commonly used in the cosmetics field, such as any of the other ingredients.

In the case of a wash-off type cosmetic such as a make-up removing agent, a detergent, etc. in which the active ingredient remains on the skin in a short period of time when the compound of formula (1) is produced into a cosmetic product, . On the other hand, in the case of leave-on type cosmetics, such as lotion, cream, essence, etc., in which the active ingredient remains on the skin for a long period of time, It may be included. In one embodiment of the present invention, although not limited thereto, the composition may contain 0.0001 wt% to 10 wt% (preferably 0.0001 wt% to 1 wt%) of the compound of Formula 1 based on the total weight of the composition . When the composition of the present invention contains less than 0.0001 wt% of the compound of the present invention, a sufficient whitening effect can not be expected. When the composition of the present invention is contained in an amount exceeding 10 wt%, undesired reactions such as allergy occur, To prevent this.

Hereinafter, the present invention will be described in detail with reference to examples. However, the following examples are illustrative of the present invention, and the present invention is not limited to the following examples.

Reference Example  1: Stevioside ( Stevioside ) Material information

[Chemical Formula 1]

(4α-13 - [(2- O -β-D-Glucopyranosyl-β-D-glucopyranosyl) oxy] kaur-16-en-18-oic acid-β-D-glucopyranosyl ester

CAS No .: 57817-89-7

Where to buy: Sichuan Hongjie Import & Export CO., LTD

Example 1 Whitening Effect - Confirming the Effect of Reducing Total Melanin

The compound of Chemical Formula 1 was added to the culture solution of mouse melanoma cell of B-16 mouse to test the whitening effect at the cellular level. (Lotan R., Lotan D. Cancer Res. 40: 3345-3350, 1980).

To evaluate the toxicity of melanoma cells in rats before the experiment, whitening evaluation was performed by selecting a concentration that is not toxic.

The compounds of formula (I) were tested in final concentrations of 1 ppm, 2.5 ppm, 5 ppm, 10 ppm, and 20 ppm in the culture medium. Arbutin, a control group, was added to the medium to a concentration of 200 ppm to prepare B-16 melanoma cells And cultured for 3 days.

Cells were then trypsinized, detached from the culture, centrifuged, and extracted with melanin. The detached cells were incubated with 1 ml of sodium hydroxide solution (1N), boiled for 10 minutes to dissolve melanin, and the absorbance was measured at 400 nm using a spectrophotometer to measure the amount of melanin produced.

The amount of melanin was measured by the absorbance of 10 ⁶ cells per unit cell, and the amount of melanin produced relative to the control group was calculated as the inhibition rate (%). The results are summarized in Table 1. The experiment was repeated three times.

Reduction of total melanin levels at the cellular level by concentration sample Melanin production (Abs.) Inhibition rate (%) Control group (no addition) 0.234 - Control 1: Arbutin (200 ppm) 0.156 33.3 The compound of formula (1) (20 ppm) 0.069 70.5 The compound of formula (1) (10 ppm) 0.135 57.7 The compound of formula (1) (5 ppm) 0.141 39.7

As can be seen from the results of Table 1, the compound of formula (I) has remarkably superior melanin production inhibitory effect on the melanoma cells of the rat cultured in comparison with the known whitening substance arbutin (Arbutin).

Formulation example  1: Preparation of pharmaceutical preparations

1. Manufacturing of powder

0.001 g of the compound of formula (1)

Lactose 1g

The above components were mixed and packed in airtight bags to prepare powders.

2. Preparation of tablets

0.2 mg of the compound of formula (1)

100 mg of corn starch

100 mg of milk

Stearic acid  Magnesium 2 mg

After mixing the above components, tablets were prepared by tableting according to a conventional method for producing tablets.

3. Preparation of capsules

0.2 mg of the compound of formula (1)

100 mg of corn starch

100 mg of milk

Stearic acid  Magnesium 2 mg

After mixing the above components, the capsules were filled in gelatin capsules according to the conventional preparation method of capsules.

4. Manufacture of rings

0.003 g of the compound of formula (1)

Lactose 1.5 g

Glycerin 1 g

Xylitol  0.5 g

After mixing the above components, they were prepared so as to be 4 g per one ring according to a conventional method.

5. Manufacture of granules

2 mg of the compound of formula (1)

Soybean extract 50 mg

200 mg of glucose

600 mg of starch

After mixing the above components, 100 mg of 30% ethanol was added and dried at 60 캜 to form granules, which were then filled in a capsule.

Formulation example  2: Manufacture of cosmetics

1. Manufacture of softening longevity (skin lotion)

As the following composition, the number of softening times containing the compound of formula (1) as an active ingredient was prepared according to a conventional method.

0.1% by weight of the compound of formula (1)

Beta-1,3-glucan 1.0 wt%

Butylene glycol 2.0 wt%

Propylene glycol 2.0 wt%

Carboxyvinyl polymer 0.1 wt%

0.2% by weight of phage-12 nonylphenyl ether

Polysorbate 80 0.4 wt%

Ethanol 10.0 wt%

0.1% by weight triethanolamine

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

2. Manufacture of nutrition lotion (milk lotion)

As in the following composition, a nutritional lotion containing the compound of the formula (1) as an active ingredient was prepared by a conventional method.

0.1% by weight of the compound of formula (1)

Beta-1,3-glucan 1.0 wt%

4.0 wt%

Polysorbate 60 1.5 wt%

1.5% by weight of sorbitan sesquioleate

0.5% by weight liquid paraffin

Caprylic / capric triglyceride 5.0 wt%

Glycerin 3.0 wt%

3.0% by weight of butylene glycol

3.0% by weight of propylene glycol

Carboxyvinyl polymer 0.1 wt%

0.2% by weight triethanolamine

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

3. Manufacture of nutritional cream

A nutritional cream containing the compound of formula (1) as an active ingredient was prepared according to a conventional method, as shown below.

0.2% by weight of the compound of formula (1)

Beta-1,3-glucan 5.0 wt%

Wax 10.0 wt%

Polysorbate 60 1.5 wt%

≪ tb > < tb > < tb >

0.5% by weight of sorbitan sesquioleate

Liquid paraffin 10.0 wt%

Squalane 5.0 wt%

Caprylic / capric triglyceride 5.0 wt%

Glycerin 5.0 wt%

3.0% by weight of butylene glycol

3.0% by weight of propylene glycol

0.2% by weight triethanolamine

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

4. Manufacture of massage cream

A massage cream containing the compound of formula (I) as an active ingredient was prepared according to a conventional method, as shown below.

0.1% by weight of the compound of formula (1)

Beta-1,3-glucan 3.0 wt%

Wax 10.0 wt%

Polysorbate 60 1.5 wt%

≪ tb > < tb > < tb >

0.8% by weight of sorbitan sesquioleate

Liquid paraffin 40.0 wt%

Squalane 5.0 wt%

Caprylic / capric triglyceride 4.0 wt%

Glycerin 5.0 wt%

3.0% by weight of butylene glycol

3.0% by weight of propylene glycol

0.2% by weight triethanolamine

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

5. Manufacture of pack

A pack containing the compound of formula (1) as an active ingredient was prepared according to a conventional method, as shown below.

0.2% by weight of the compound of formula (1)

Beta-1,3-glucan 1.0 wt%

Polyvinyl alcohol 13.0 wt%

0.2% by weight of sodium carboxymethylcellulose,

Glycerin 5.0 wt%

Allantoin 0.1 wt%

6.0% by weight of ethanol

0.3% by weight of phage-12 nonylphenyl ether

Polysorbate 60 0.3 wt%

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

Formulation example  3: Topical  Produce

1. Manufacture of gel

As in the following composition, a gel containing the compound of formula (1) as an active ingredient was prepared according to a conventional method.

0.1% by weight of the compound of formula (1)

0.1% by weight of beta-1,3-glucan

0.05% by weight of sodium ethylenediaminetetraacetate

Glycerin 5.0 wt%

Carboxyvinyl polymer 0.3 wt%

5.0% by weight of ethanol

≪ tb > < tb > < tb >

Triethanolamine 0.3 wt%

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

2. Manufacture of ointment

An ointment containing the compound of formula (I) as an active ingredient was prepared according to a conventional method, as shown below.

0.5% by weight of the compound of formula (1)

Beta-1,3-glucan 10.0 wt%

Wax 10.0 wt%

Polysorbate 60 5.0 wt%

≪ tb > < tb > < tb >

0.5% by weight of sorbitan sesquioleate

Vaseline 5.0 wt%

Liquid paraffin 10.0 wt%

Squalane 5.0 wt%

SHARE BUTTER 3.0 wt%

Caprylic / capric triglyceride 5.0 wt%

Glycerin 10.0 wt%

Propylene glycol 10.2 wt%

0.2% by weight triethanolamine

Preservative 0.05 wt%

0.05% by weight of pigment

0.05% by weight fragrance

Purified water to 100%

3. Preparation of topical medicament (gel ointment)

A gel ointment agent containing the compound of the formula (1) as an active ingredient was prepared according to a conventional method.

0.5% by weight of the compound of formula (1)

Beta-1,3-glucan 10.0 wt%

1.5% by weight of polyacrylic acid (Carbopol 940)

5.0% by weight of isopropanol

Hexylene glycol 25.0 wt%

Triethanolamine 1.7 wt%

Deionized water to 100%

4. Preparation of topical medicines (patches)

As the following composition, a patch containing a compound of the formula (1) as an active ingredient was prepared by a conventional method.

0.5% by weight of the compound of formula (1)

Beta-1,3-glucan 3.0 wt%

Hexylene glycol 20.0 wt%

Diethylamine 0.7 wt%

1.0% by weight of polyacrylic acid (Carbopol 934P)

0.1% by weight of sodium sulfite

1.0% by weight of polyoxyethylene lauryl ether (E.O. = 9)

1.0% by weight of polyhydroxyethylene cetyl stearyl ether (Cetomacrogol 1000)

Viscous paraffin oil 2.5 wt%

2.5% by weight of caprylic acid ester / capric acid ester (Cetiol LC)

Polyethylene glycol 400 3.0 wt%

Deionized water to 100%

Claims (2)

A pharmaceutical composition for skin whitening comprising a compound represented by the following formula (1) as an active ingredient:
[Chemical Formula 1]

A cosmetic composition for skin whitening comprising a compound represented by the following formula (1) as an active ingredient:
[Chemical Formula 1]