Patent Application
20200190143
The present invention relates to a peptide having binding ability to cell-receptor, a microcapsule including the peptide linked thereto, and a cosmetic composition containing the microcapsule.
A microcapsule is a base technology used in various fields, such as those of pharmaceuticals, paints, electronics and cosmetics, and is particularly receiving attention in the pharmaceutical and cosmetic fields as the best tool for maintaining the initial titer of an active ingredient (Journal of Controlled Release, 58, 9, 1999).
However, when applied to the human body, a cosmetic composition containing the microcapsule known at present does not exhibit a noticeably improved effect compared to a cosmetic composition not using the microcapsule.
Recently, development of delivering the microcapsule to target cells based on the drug delivery system principle is continuing. However, techniques known at present are still unsatisfactory due to the molecular instability of the microcapsule, problems related to binding affinity to target cells, and the like.
(Patent Document 1) KR 10-1051557 B1
An objective of the present invention is to provide a peptide having high binding affinity to target cells.
Another objective of the present invention is to accurately and stably deliver an active ingredient to target cells.
Still another objective of the present invention is to provide a cosmetic composition having improved delivery efficiency of an active ingredient to the skin.
An aspect of the present invention provides a peptide having binding ability to cell-receptor, in which the peptide includes any one sequence of SEQ ID NOS: 1 to 3.
Another aspect of the present invention provides a microcapsule including the peptide linked to the surface thereof.
Still another aspect of the present invention provides a cosmetic composition containing the microcapsule.
According to an aspect of the present invention, a peptide has superior selective binding affinity to a target. According to another aspect of the present invention, a microcapsule has superior physicochemical stability. Therefore, a cosmetic composition containing the microcapsule bound to the peptide can exhibit high delivery efficiency of an active ingredient included in the capsule to target cells, thereby manifesting superior skin-condition improvement effects.
Hereinafter, a detailed description will be given of the present invention.
An aspect of the present invention pertains to a peptide having binding ability to cell-receptor, in which the peptide includes any one sequence of SEQ ID NOS: 1 to 3.
As used herein, the term “binding ability to cell-receptor” means the ability to bind to receptors formed on cells.
The amino acid sequences of the peptides of SEQ ID NOS: 1 to 3 are shown in Table 1 below.
In Table 1, Ala represents alanine, Asp represents aspartic acid, Glu represents glutamic acid, Gly represents glycine, His represents histidine, Ile represents isoleucine, Lys represents lysine, Phe represents phenylalanine, Pro represents proline, Ser represents serine, Trp represents tryptophan, Tyr represents tyrosine, and Thr represents threonine.
In one aspect, cells targeted by the peptide may include melanocytes, keratinocytes or fibroblasts.
Also, the cell receptor may include a fibroblast growth factor receptor, an integrin receptor or a melanocortin receptor. Specifically, the melanocortin receptor may be a melanocortin 1 receptor (MC1R).
In an exemplary embodiment, the peptide of SEQ ID NO: 1 targets fibroblasts, and may bind to a fibroblast growth factor receptor.
Also, in an exemplary embodiment, the peptide of SEQ ID NO: 2 targets melanocytes, and may bind to a melanocortin receptor.
Also, in an exemplary embodiment, the peptide of SEQ ID NO: 3 targets keratinocytes, and may bind to an integrin receptor, especially a beta-1 family integrin receptor.
In one aspect, the peptides do not bind to cells other than respective target cells or receptors thereof, and the binding affinity thereof is high. Therefore, when a predetermined component is linked to the peptide, high delivery efficiency thereof to the target can be expected.
Another aspect of the present invention pertains to a microcapsule including the peptide linked to the surface thereof. The peptide may be linked onto a microcapsule by binding a hydrophilic group on the microcapsule, for example, a carboxyl group, to an N-terminus on the peptide, but the linking method is not limited, and may be performed through various methods well-known to those skilled in the art.
The microcapsule may include a wide variety of polymers, examples of which include polymers, heat-sensitive polymers, light-sensitive polymers, magnetic polymers, pH-sensitive polymers, salt-sensitive polymers, chemically sensitive polymers, polymer electrolytes, polysaccharides, peptides, proteins and/or plastics, but are not limited thereto. Examples of the polymer include, but are not limited to, poly(N-isopropylacrylamide) (PNIPAAm), poly(styrene sulfonate) (PSS), poly(allyl amine) (PAAm), poly(acrylic acid) (PAA), poly(ethylene imine) (PEI), poly(diallylmethylammonium chloride) (PDADMAC), poly(pyrrole) (PPy), poly(vinylpyrrolidone) (PVPON), poly(vinyl pyridine) (PVP), poly(methacrylic acid) (PMAA), poly(methyl methacrylate) (PMMA), polystyrene (PS), poly(tetrahydrofuran) (PTHF), poly(phthalaldehyde) (PTHF), poly(hexyl viologen) (PHV), poly(L-lysine) (PLL), polyvinyl alcohol (PVA), poly(L-arginine) (PARG), and poly(lactic-co-glycolic acid) (PLGA).
In an exemplary embodiment, the capsule may be provided in the form of a bilayer, in which the outer layer may include polyvinyl alcohol and the inner layer may include poly(lactic-co-glycolic acid) (PLGA).
Also, the microcapsule may include at least one material capable of generating an effective neutral charge, a negative charge or a positive charge on the outer layer of the capsule. In some cases, the charge of the capsule may aid to prevent or promote aggregation or clustering of the particles.
In one aspect, the peptide may be included in a density of 0.1 to 10 peptides/μm2 based on the total cross-sectional area of the microcapsule, and the density of the peptide is preferably 0.3 to 8 peptides/μm2, and most preferably 0.4 to 7 peptides/μm2. The density of the peptide may mean the number of peptide strands present per unit surface area of the microcapsule.
For example, if the density of the peptide on the microcapsule is less than 0.1 peptides/μm2 or exceeds 10 peptides/μm2, a skin-condition improvement effect similar to that of a microcapsule to which the peptide is not linked may result, and given the above density range, good binding affinity to target cells and active ingredient delivery efficiency may be manifested.
In one aspect, the microcapsule further includes an active ingredient encapsulated in the capsule, and the active ingredient may include at least one selected from the group consisting of amino acids, plant-derived proteins or hydrolysates thereof, and yeast ferments, lysates thereof or filtrates thereof. Also, the active ingredient encapsulated in the capsule may include various plant extracts and fruit extracts thereof. Specifically, the plant extract may include a Narcissus tazetta bulb extract, a Leucojum aestivum bulb extract, etc., and the fruit extract may include a Hylocereus undatus fruit extract.
Also, the amino acids are not limited, and may include arginine, alanine, glutamine, glycine, isoleucine, leucine, lysine, histidine, proline, tyrosine, serine, valine, phenylalanine, tryptophan, threonine, aspartic acid, and the like.
In an exemplary embodiment, the plant-derived protein may include a lupine protein, and the yeast may include Pichia pastoris. In an exemplary embodiment, the yeast ferment may be a Pichia ferment lysate filtrate.
In the above aspect, each of the plant-derived protein or the hydrolysate thereof, and the yeast ferment, the lysate thereof or the filtrate thereof may be contained in an amount of 0.0001 to 30 wt % based on the total weight of the active ingredient. If the amount thereof is less than 0.0001 wt %, the effects thereof may become insignificant. On the other hand, if the amount thereof exceeds 30 wt %, stability problems such as discoloration and odor problems may occur. Each of the plant-derived protein or the hydrolysate thereof, and the yeast ferment, the lysate thereof or the filtrate thereof is preferably contained in an amount of 0.01 to 30 wt %, more preferably 0.01 to 25 wt %, based on the total weight of the active ingredient.
The amino acids may be contained in an amount of 0.00001 to 0.1 wt %, preferably 0.0001 to 0.1 wt %, and more preferably 0.0001 to 0.05 wt %, and the plant extract or the fruit extract may be contained in an amount of 0.0001 to 30 wt %. Each of the plant extract and the fruit extract is preferably contained in an amount of 0.001 to 20 wt %, and most preferably 0.001 to 15 wt %.
If the amount of amino acids is less than 0.00001 wt %, the effects thereof may become insignificant. On the other hand, if the amount thereof exceeds 0.1 wt %, problems related to unstable viscosity of the resulting formulation may occur.
If the amount of the plant extract or the fruit extract is less than 0.0001 wt %, the effects thereof may become insignificant. On the other hand, if the amount thereof exceeds 30 wt %, problems related to discoloration, odor and unstable viscosity of the resulting formulation may occur.
When the amounts of the components listed above fall in the above ranges, it is possible to obtain excellent moisturizing, skin barrier enhancement, whitening, wrinkle reduction and skin elasticity improvement effects.
Still another aspect of the present invention pertains to a cosmetic composition containing the microcapsule. The composition may be used for moisturizing, skin barrier enhancement, whitening, wrinkle reduction or skin elasticity improvement.
In the present specification, “skin barrier enhancement” means promotion of differentiation of skin keratinocytes, thus strengthening the outermost layer of the skin to thereby improve the state of the skin.
In one aspect, the composition may promote the synthesis of keratin 1, keratin 5, keratin 10, keratin 14, filaggrin, loricrin, elastin, collagen and the like.
In one aspect, the amount of the microcapsule in the cosmetic composition may be 0.0001 to 30 wt %, preferably 0.001 to 20 wt %, and most preferably 0.01 to 10 wt %.
If the amount of the microcapsule in the cosmetic composition is less than 0.0001 wt %, the effects thereof are insignificant. On the other hand, if the amount thereof exceeds 30 wt %, the dispersibility of the capsule in the composition may decrease and the viscosity of the resulting cosmetic composition may be changed.
In the present specification, the microcapsule in which the active ingredient is blended in an optimal amount and is encapsulated is called “CellActive Code”. Also, a variety of formulations, such as toners, ampoules, serums, eye creams, nourishing creams and lotions may be manufactured using the composition containing the microcapsule. Encapsulating the active ingredient in the microcapsule is called smart capsulation. Also, the technique of accurately delivering the composition containing the microcapsule (smart capsule) including the active ingredient encapsulated therein to target cells is called “CellActive Technology”.
A better understanding of the present invention will be given through the following preparation examples and examples. These preparation examples and examples are merely set forth to illustrate the present invention but are not to be construed as limiting the scope of the present invention.
The peptides of SEQ ID NOS: 1 to 3 shown in Table 1 were synthesized through an FMOC solid-phase method using an automated synthesizer (PeptrEx-R48, Peptron, Daejeon, Korea). The peptides thus synthesized were purified and analyzed through reverse-phase high-performance liquid chromatography (HPLC) (Prominence LC-20AB, Shimadzu, Japan) using RP columns (Shiseido Capcell Pak), and identified using a mass spectrometer (HP 1100 Series LC/MSD, Hewlett-Packard, Roseville, USA).
A lipid concentrate part (ceramide, cholesterol, hydrogenated lecithin) was placed in a separate dissolution tank and warmed to 70° C. and thus dissolved, and a hydrophilic bioactive material part (panthenol, raffinose, niacinamide, Camellia sinensis leaf water) was placed in a separate dissolution tank and warmed to 45° C. and thus dissolved. The lipid concentrate part prepared above was placed in a dissolution tank containing a lipid stabilizer part and agitated for 5 min at a speed of 1,500 rpm using an agitator at 50° C., and the hydrophilic bioactive material part was added thereto, agitated for 5 min at a speed of 1,500 rpm using an agitator and homogenized, thus preparing a first concentrate phase in which the excess of hydrophilic active ingredient was bulkily homogenized. Moreover, the first concentrate phase was agitated for 1 hour at a low speed of 500 rpm using an agitator at 50° C., whereby the first concentrate phase was sufficiently hydrated. The first concentrate phase thus hydrated was placed in a high-pressure emulsifying machine at 50° C. and treated two times at a pressure of 9,000 bar, thereby forming a second concentrate phase in which the excess of hydrophilic bioactive material was positioned in the aqueous phase formed between the innermost aqueous phase and the lipid bilayer and was concentrated and encapsulated to a nano size. The second concentrate phase was then cooled to 28° C. with gentle agitation at a speed of 500 rpm using an agitator and thus stabilized, thereby manufacturing a peptide-unbound microcapsule. The diameter of the microcapsule thus manufactured was about 0.2 micrometer.
The peptide of Preparation Example 1 was attached to the microcapsule manufactured in Preparation Example 2-1.
The peptide of Preparation Example 1 was attached to the surface of the microcapsule by linking the N-terminus of the peptide to the carboxyl group on the surface of the peptide-unbound microcapsule. Specifically, the peptide-unbound microcapsule was resuspended in a MES (2-(N-morpholino)ethanesulfonic acid) buffered saline (pH 5.5) and allowed to react with EDAC (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide) and NHS (N-hydroxysuccinimide) for about 1 hr. Thereafter, the microcapsule was centrifuged at about 15000 rpm for about 1 hour, thus removing EDAC and NHS to thereby activate the surface of the peptide-unbound microcapsule. Thereafter, the microcapsule was suspended in about 100 ml of PBS (phosphate-buffered saline), and was then allowed to react with about 0.1 g of the peptide of SEQ ID NO: 1 at room temperature. Thereafter, unreacted peptide was removed through washing with a PBS buffer. The peptide-linked microcapsules were manufactured using the peptides of SEQ ID NOS: 2 and 3 in the same manner as above, with the exception that the amounts of reagents that were added were adjusted. Whether the peptide was attached onto the microcapsule was evaluated through a Kaiser test. Additionally, the peptide density on the surface of the microcapsule was measured to be about 2 peptides/μm2 using a scanning electron microscope (JSM-7100F).
The microcapsule to which the peptide of SEQ ID NO: 1 was linked was referred to as capsule 1, the microcapsule to which with the peptide of SEQ ID NO: 2 was linked was referred to as capsule 2, and the microcapsule to which the peptide of SEQ ID NO: 3 was linked was referred to as capsule 3.
A microcapsule was manufactured in the same manner as in Preparation Example 2, with the exception that the amount of the peptide that was added and the peptide density on the microcapsule were adjusted. The experimental groups were divided as follows depending on the density.
B16 melanoma cells were treated with 10 μM of each of capsules 1 to 3, and cell viability was evaluated. A control group was treated with kojic acid and arbutin. As a result, the cell viability was hardly changed upon treatment with the capsule of the present invention, indicating that there was no cytotoxicity.
In order to evaluate whether capsules 1 to 3 were able to bind to cells other than respective target cells, binding to various types of cells was measured. As a result, it was confirmed that capsules 1 to 3 hardly bound to cells other than respective target cells.
The binding affinity of capsule 1 to cells was evaluated using flow cytometry (FACS) through fluorescence immunoassay. The cells used were fibroblasts, keratinocytes, lymphocyte, monocytes, melanocytes, dendritic cells and skin neuron. Based on the results of measurement, the binding rate of capsule 1 to fibroblasts, which are target cells, was about 75%, but the binding affinity thereof to cells other than the target cells was very low (
Capsule 2 was tested in the same manner as in Example 2-1. As a result, the binding affinity of capsule 2 to melanocytes, as target cells, was about 70%, but the binding rate thereof to other cells was very low (
Capsule 3 was tested in the same manner as in Example 2-3. As a result, the binding rate of capsule 3 to keratinocytes, as target cells, was about 85%, but the binding rate thereof to other cells was very low (
The binding affinity of the microcapsule, the surface of which was linked with the peptide, and the microcapsule, the surface of which was not linked with the peptide, to fibroblasts and the absorption ability of the active ingredient were compared.
The binding process was delayed by culturing capsule 1 and target cells together at 4° C. for 1 hour, after which the binding affinity of the microcapsule, the surface of which was linked with the peptide, and the microcapsule, the surface of which was not linked with the peptide, to fibroblasts was measured. The binding affinity of capsule 1 to fibroblasts was as high as about 4 times the binding affinity of the microcapsule to which the peptide was not linked.
The microcapsule, the surface of which was linked with the peptide, was reacted with fibroblasts, and the amounts of elastin and collagen that were produced were measured.
When using the capsule to which the peptide was not linked, the amount of collagen that was produced was insignificant, but when using capsule 1, to which the peptide was linked, the production of collagen type 1 and type 3 was increased by at least about 1.7 times compared to the capsule to which the peptide was not linked (
7 days after the capsule reaction, elastin production by a maximum of 9 times or more was exhibited when using capsule 1, to which the peptide was linked, compared to when using the capsule to which the peptide was not linked (
An ampoule containing 30 wt % of capsule 1 based on the total weight thereof was manufactured, and the ampoule was uniformly applied twice a day over the face of each of 21 females, from 35 to 65 years of age and free of skin disease, for 28 days, and the extent of reduction of wrinkles around the eyes was observed. As a result, an effect of reducing wrinkles around the eyes by about 10% was confirmed (
After treatment with 10 μM of each of the microcapsule, the surface of which was linked with the peptide (capsule 2), and the microcapsule, the surface of which was not linked with the peptide, the binding affinity between melanocyte and alpha-melanocyte stimulating hormone (MSH) was measured. As a result, when using capsule 2, it was found that the binding affinity of melanocyte and alpha-MSH was reduced by 95% or more (
After treatment with 10 μM of each of the microcapsule, the surface of which was linked with the peptide, and the microcapsule, the surface of which was not linked with the peptide, the amounts of melanin that was synthesized were compared. As a result, when capsule 2 was administered, it was found that the production of melanin from melanocytes was greatly reduced (
A toner containing 15% of capsule 2 was uniformly applied twice a day over the face of each of 21 females, from 35 to 55 years of age and free of skin disease, for 14 days, and the whitening effect was evaluated. As a result, when the toner containing capsule 2 was applied, a significantly improved whitening effect was confirmed (
In order to evaluate the skin barrier improvement effect of capsule 3, to which the peptide was linked, the expression enhancement effect of keratin was measured. After treatment with 10 μM of each of the microcapsule, the surface of which was linked with the peptide, and the microcapsule, the surface of which was not linked with the peptide, the extent of expression of the above factors was measured. As a result, the amounts of keratin 1 and keratin 5 that were expressed were increased by about two times when using capsule 3 compared to when using the capsule to which the peptide was not linked (
Capsule treatment was performed in the same manner as in Example 5-1, and the filaggrin synthesis effect was measured. As a result, filaggrin expression by about 5 times was confirmed when using capsule 3 compared to when using the capsule to which the peptide was not linked (
A nourishing cream containing 20% of capsule 3 was uniformly applied twice a day over the face of each of 20 females, from 35 to 55 years of age and free of skin disease, for 14 days, and the skin dermal density and skin thickness were measured. As a result, when the nourishing cream containing capsule 3 was applied, the dermal density and skin thickness were significantly improved, and thus the skin barrier improvement effect was confirmed (
The experimental groups shown in Table 2 were tested as in Examples 3 to 6. The effect of using capsules 1-3, 2-3 and 3-3 (peptide density: 2 peptides/μm2) was determined to be 10, and the results of individual experimental groups were represented as values relative to the capsules 1-3, 2-3 and 3-3.
Table 3 below shows the experimental results corresponding to the experiment of Example 3, Table 4 below shows the experimental results corresponding to Example 4, and Table 5 below shows the experimental results corresponding to Example 6.
As a result, when the peptide density fell out of the range of 0.1 to 10 peptides/μm2, the skin-condition enhancement effect was found to be insignificant.
Pichia ferment lysate filtrate
Hylocereus undatus fruit extract
cordata extract, Chamomilla recutita flower
Lavandula angustifolia flower/leaf/stem
Foeniculum vulgare leaf extract
Camellia sinensis leaf water and other
Pichia ferment lysate filtrate
Leucojum aestivum bulb extract
Bellis perennis flower extract
Camellia sinensis leaf water and other
Pichia ferment lysate filtrate
Leucojum aestivum bulb extract
cordata extract & Chamomillarecutita flower
Lavandula angustifolia flower/leaf/stem
Foeniculum vulgare leaf extract
Camellia sinensis leaf water and other
Pichia ferment lysate filtrate
Leucojum aestivum bulb extract
Camellia sinensis leaf water and other
Pichia ferment lysate filtrate
Narcissus tazetta bulb extract
Aloe barbadensis leaf extract
Camellia sinensis leaf water and other
Pichia ferment lysate filtrate
Narcissus tazetta bulb extract
Houttuynia cordata extract & Chamomilla
recutita flower extract & Althaea officinalis
officinalis extract & Foeniculum vulgare
Camellia sinensis leaf water and other
SEQ ID NO: 1 (Ala-Lys-Ser-Thr) is the sequence of peptide that targets fibroblasts, and the peptide of SEQ ID NO: 1 is able to bind to a fibroblast growth factor receptor.
SEQ ID NO: 2 (Glu-Gly-His-Lys-Ile-Phe-Pro-Ser-Trp-Tyr) is the sequence of peptide that targets melanocytes, and the peptide of SEQ ID NO: 2 is able to bind to a melanocortin receptor.
SEQ ID NO: 3 (Ala-Asp-Gly-Ser-Pro) is the sequence of peptide that targets keratinocytes, and the peptide of SEQ ID NO: 3 is able to bind to an integrin receptor, especially a beta-1 family integrin receptor.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2017-0107511 | Aug 2017 | KR | national |
| 10-2018-0006114 | Jan 2018 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2018/000916 | 1/19/2018 | WO | 00 |
