JP3827259B2 - Keratinization promoter - Google Patents

Keratinization promoter Download PDF

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JP3827259B2
JP3827259B2 JP14315397A JP14315397A JP3827259B2 JP 3827259 B2 JP3827259 B2 JP 3827259B2 JP 14315397 A JP14315397 A JP 14315397A JP 14315397 A JP14315397 A JP 14315397A JP 3827259 B2 JP3827259 B2 JP 3827259B2
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Prior art keywords
acid
keratinization
calcium
epidermal
skin
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JPH10316575A (en
Inventor
季栄 安田
裕紀子 太田
洋子 遠藤
紳太郎 井上
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Kao Corp
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Kao Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、ケイ酸関連物質、例えばケイ酸、メタケイ酸、オルトケイ酸、水ガラスなどと、カルシウム、例えば塩化カルシウム、炭酸カルシウムなどを有効成分とする表皮角質化促進剤に係る。更に詳しくは、表皮細胞の角質化を促進することで皮膚バリア機能を改善し、アトピー性皮膚炎や乾癬、乾皮症、肌荒れ、頭皮のフケ症、唇の荒れなど各種皮膚疾患の改善に有効な、ケイ酸関連物質およびカルシウムを有効成分とする表皮角質化促進剤に関する。
【0002】
【従来の技術】
健全な皮膚表皮における角質層は、優れたバリア機能を有し、体内の水分蒸散を防ぐと共に、外来抗原などの異物が体内に侵入することや外的刺激が体内に伝わることを防ぐなど、生体防御に重要な役割を果たしている。それに対し、アトピー性皮膚炎、乾癬、乾皮症、肌荒れ、頭皮のフケ症、唇の荒れなど各種皮膚疾患においては、健全な角質層の形成が妨げられていることが知られている(J.Soc.Cosmet.Chem.Japan、23巻、1号、5頁、1989年)。
【0003】
この角質層の形成不全すなわち不全角化は、皮膚のバリア機能の低下をもたらし、水分の蒸散や外来の異物の侵入、外的刺激の体内への伝達が容易となり、皮膚の乾燥や各種皮膚疾患の惹起あるいは悪化に結びつくと考えられる。
【0004】
このような皮膚疾患を防止し、健常な皮膚を維持するために、ある種の成分を投与することにより皮膚のトラブルを正常化することが考えられる。従来、上記目的のための主たる方法として、保湿成分を投与することで皮膚の乾燥状態を防ぎ潤いを持たせることが行われてきた。
【0005】
しかし、前記従来の方法は、一般的に角質表面の水分補給あるいは保湿成分の一部補給を行うものであり、その効果が一時的なものに留まり、皮膚バリアーの回復効果を持続的に与える事ができず(武村俊之:ファルマシア、28巻、1頁、1992年)、この問題の解決が望まれていた。
【0006】
【発明が解決しようとする課題】
かかる事情に鑑み、本発明者等は、表皮細胞自身の角質化を促進させる事を意図し、培養表皮細胞での探索を鋭意検討してきた。各地の温泉水について検討したところ、メタケイ酸とカルシウムを高濃度で含有する温泉水に強い表皮細胞角質化促進作用を見出した。
【0007】
さらに検討を重ねた結果、ケイ酸関連物質とカルシウムの共存によりに強い表皮細胞角質化促進作用を見出し、本発明を完成した。その目的とするところは、表皮細胞の角質化促進作用、それによるアトピー性皮膚炎、乾癬、乾皮症、肌荒れ、頭皮のフケ症、唇の荒れなどの各種皮膚疾患の防止、バリア機能の回復効果を有する表皮角質化促進剤を提供するにある。
【0008】
【課題を解決するための手段】
上述の目的は、ケイ酸関連物質およびカルシウムを含有することを特徴とする表皮角質化促進剤によって達成される。
【0009】
【発明の実施の形態】
以下、本発明の構成について詳説する。
【0010】
本発明の構成成分であるケイ酸関連物質は、ケイ酸およびケイ酸塩をさすものである。具体的には例えばメタケイ酸,オルトケイ酸,メタ二ケイ酸,メタ三ケイ酸,水ガラス,あるいはこれらの化学的に可能な塩、具体的にはナトリウム塩,カリウム塩,マグネシウム塩,アルミニウム塩,カルシウム塩等の塩が挙げられ、さらに具体的には、メタケイ酸ナトリウム,ケイ酸ナトリウム,ケイ酸カリウム,オルトケイ酸ナトリウム等が挙げられる。
【0011】
ケイ酸は、水に不溶であること、メタケイ酸,オルトケイ酸,メタ二ケイ酸,メタ三ケイ酸は溶液中にしか存在しないこと、ケイ酸,メタケイ酸,オルトケイ酸,メタ二ケイ酸,メタ三ケイ酸のマグネシウム塩も水に不溶であることから、本発明の表皮角質化促進剤に用いるケイ酸関連物質としては、メタケイ酸ナトリウム,ケイ酸ナトリウム,ケイ酸カリウム,オルトケイ酸ナトリウム,水ガラスが利用しやすいため、より好ましい。
【0012】
また、本発明の構成成分であるケイ酸関連物質を表皮角質化促進剤として化粧料等の水溶液等の形態で用いる場合は、これらの他更に酸を含有させ、pHを2〜10に調整するのが好ましい。入浴剤などのように、形態としては固体であっても使用時に水溶液となるものについても、酸を含有させ、使用状態でのpHが2〜10になるように調整するのが好ましい。
【0013】
pHを調整するために用いる酸は、特に限定されるものではないが、具体的には例えばクエン酸,酢酸,リンゴ酸,有機酸,ギ酸,アスパラギン酸等の酸性アミノ酸,塩酸,硫酸等が挙げられる。
【0014】
ケイ酸関連物質の組成物への配合量としては、その用途や剤型により異なるが、皮膚外用剤、化粧料または入浴剤などの用途、剤型を用いる場合は、総量を基準として0.1〜99重量%が好ましく、特に0.1〜50重量%が好ましい。さらには単位ケイ素あたりのカルシウムのモル比が、10以上となることが好ましい。
【0015】
ケイ酸関連物質の投与量は、患者あるいは不全角化の生じた人の年齢、体重、症状あるいは投与方法等により異なるが、皮膚外用剤や化粧料に適用する場合には、経皮投与によって1回当たり1〜50mg投与できるように配合し、あるいは入浴剤に適用する場合においては、一日あたり10〜30分入浴する場合、湯浴中の濃度が1〜5000mg/lとなるように配合するのが好ましい。
また、培養細胞系に添加して用いる場合には、0.1〜100000μM添加するのが好ましい。
【0016】
また同じく本発明の構成成分であるカルシウムは水に溶解してカルシウムイオンを発するものを好適に用いることができる。具体的には例えば塩化カルシウム、水酸化カルシウム、炭酸カルシウムが挙げられる。
【0017】
カルシウムの組成物への配合量としては、その用途や剤型により異なるが、皮膚外用剤、化粧料または入浴剤などの総量を基準として0.1〜99重量%が好ましく、特に0.1〜50重量%が好ましい。
【0018】
カルシウムの投与量は、患者あるいは不全角化の生じた人の年齢、体重、症状あるいは投与方法等により異なるが、皮膚外用剤や化粧料に適用する場合には、経皮投与によって1回当たり1〜50mg投与できるように配合し、あるいは入浴剤に適用する場合においては、一日あたり10〜30分入浴する場合、湯浴中の濃度が1〜5000mg/lとなるように配合するのが好ましい。
また、培養細胞系に添加して用いる場合には、0.1〜10mM添加するのが好ましい。
【0019】
これら2種の化合物からなる本発明の表皮角質化促進剤を適用する際の形態としては、固体のケイ酸関連物質およびカルシウムの組成物、またはこれらを水、中和水、酸性水などで希釈したもの、あるいは希釈したものにさらにメチルパラベン等の防腐剤などを適宜添加したもの等が挙げられる。
【0020】
本発明の表皮角質化促進剤は、その使用目的に応じて、通常用いられる医学的に許容される公知の成分、皮膚外用剤、化粧料または入浴剤等の通常用いられる公知の成分とともに経皮適用組成物に配合することができる。
【0021】
【実施例】
以下、実施例により詳細に説明する。実施例に先立ち、ケイ酸関連物質とカルシウムの角質化促進試験について述べる。
【0022】
試験例1(角質化促進試験)
(1)方法
(a)培養表皮細胞
ヒト正常表皮細胞は市販品(Cascade Biology社製)を用いた。
【0023】
(b)細胞培養用培地
培地としては、MCDB153HAA培地(極東社製)をベースにして、これにハイドロコーチゾン(0.5μM)、エタノールアミン(0.1mM)、ホスホエタノールアミン(0.1mM)、インシュリン(5μg/ml)、およびEGF(上皮細胞成長因子:10ng/ml)を加えたK−GM培地を用いた。又細胞の増殖培養時には、これにBPE(牛脳下垂体抽出液)(Cascade
Biology社製)を添加して(4μl/ml培地)用いた。
【0024】
(c)Hepes緩衝液の調製
Hepes7.15g 、グルコース1.8g 、塩化カリウム0.22g 、塩化ナトリウム7.7g 、リン酸水素二ナトリウム・12水和物0.27g を精製水に溶解し、1N水酸化ナトリウム水溶液にてpH7.4に調製後、1lにメスアップした。
【0025】
(d)細胞培養
正常ヒト表皮細胞の細胞数をMCDB153HAA培地(BPE添加)にて1×104 個/mlに調製し、24穴コラーゲンコートプレート(コーニング社製)に1mlずつ播種し、95%空気(V/V)−5%(V/V)炭酸ガスの雰囲気下、37℃で4日間静置培養した。その後、本発明の構成成分であるケイ酸関連物質、カルシウムなどの表皮角質化促進剤を含有するMCDB153HAA培地(BPE添加:0.4μl/ml培地)に交換した。対照としてはMCDB153HAA培地(BPE添加:0.4μl/ml培地)を用いた。その後95%空気(V/V)−5%(V/V)炭酸ガスの雰囲気下、37℃で5日間静置培養した。この間2日置きに培地交換を行った。
【0026】
(f)角質膜形成能の測定
培養後、培養上清を吸引除去し、Hepes緩衝液で2回洗浄した後、細胞をトリプシン処理で剥離させ、総細胞数を測定した。その後、残りの細胞を20μg/mlのカルシウムイオノフォア(A23187)および1.25mMカルシウムイオンを含む500μlの培地にて37℃、2時間静置し、更に1%SDS(ラウリル硫酸ナトリウム)/20mM DTT(ジチオスレイトール)液に細胞を溶解し、100℃ 5分間熱処理をした。熱処理後、不溶化細胞数(角質化細胞数)を計測した。角化率(%)=(角質化細胞数/総細胞数)×100で算出し、結果は対照の角化率を100とした場合の角化促進率で表した。
【0027】
(2)結果
試験例1で用いた、ケイ酸関連物質とカルシウムの効果を表1、2に示した。薬剤無添加の対照に比べ、メタケイ酸ナトリウムやケイ酸ナトリウム、塩化カルシウム添加培養では表皮細胞角質率をそれぞれ濃度依存的に上昇させた。ケイ酸関連物質やカルシウムがヒト表皮細胞の角質化を促進することが分かった。さらにケイ酸関連物質とカルシウムの共存下では、特にケイ素/カルシウムのモル比が0.001以下で、ヒト表皮細胞自体の高い角質化促進が認められた。
【0028】
【表1】

Figure 0003827259
【0029】
【表2】
Figure 0003827259
【0030】
実施例1
メタケイ酸ナトリウム12.2mgを、20mM塩酸溶液9mlに溶解し、pHを1N水酸化ナトリウムで中和後、1M塩化カルシウム溶液を10μl添加し、精製水で10mlにメスアップした。それを、ポアサイズが0.2μmのニトロセルロース膜(アドバンテック東洋製、DISMIC−25)で濾過滅菌し、表皮角質化促進剤とした。
【0031】
実施例2
ケイ酸カリウム15.4mgを用いる以外は、実施例1と同様にして表皮角質化促進剤を調製した。
【0032】
実施例3
オルトケイ酸ナトリウム18.4mg、40mM塩酸溶液9mlを用いる以外は、実施例1と同様にして表皮角質化促進剤を調製した。
【0033】
実施例4
水ガラス16.9mgを用いる以外は、実施例1と同様にして表皮角質化促進剤を調製した。
【0034】
実施例5〜8
実施例1,2,3,4の表皮角質化促進剤を、それぞれ0.1重量%メチルパラベン溶液で10倍希釈して、実施例5,6,7,8の表皮角質化促進剤を調製した。
【0035】
応用例1〜4(ローション)
実施例1,2,3,4いずれかの表皮角質化促進剤とラウリル硫酸ナトリウム、精製水を表3に示した量に調製して湯浴で80℃に加温して混合し、一方サラシミツロウ、セタノール、濃グリセリンを表3に示した量に調製して80℃に加温して混合し、この混合物へ加温した表皮角質化促進剤混合物を攪拌しながら徐々に加え、ホモジナイザー(TOKUSHUKIKAKOGYO製)で2.5分間激しく攪拌(2500rpm)した。攪拌しながら徐々に室温まで冷却して、100g中にメタケイ酸塩6mMを含むそれぞれの応用例1,2,3,4のローションを得た。
【0036】
【表3】
Figure 0003827259
【0037】
応用例5〜8(クリーム)
表4の成分▲3▼を約80℃で均一に混合溶解し、約80℃で均一に混合溶解しておいた成分▲1▼中に加えて乳化した後、約50℃で均一に混合溶解しておいた成分▲2▼を添加し、約30℃まで冷却して、応用例5,6,7,8のクリームを調製した。
【0038】
【表4】
Figure 0003827259
【0039】
応用例9〜12(オイリーヘアートニック)
実施例5,6,7,8いずれかの表皮角質化促進剤を37.2g用い、表5の組成に従って、親水性成分と親油性成分を混合攪拌して、処方例9,10,11,12のオイリーヘアートニックを得た。
【0040】
【表5】
Figure 0003827259
【0041】
応用例13〜16(ヘアークリーム)
実施例1,2,3,4いずれかの表皮角質化促進剤を含む下記表6に示す親水性成分を、約80℃で均一に混合溶解し、予め約80℃で均一に混合溶解しておいた親油性成分中に加えて乳化した後、約50℃で香料成分を添加し、約30℃になるまで攪拌を続け、処方例13,14,15,16のヘアークリームを調製した。
【0042】
【表6】
Figure 0003827259
【0043】
応用例17
表7に示した処方の入浴剤組成物を、粉体を混合する通常の方法で調製し、メタケイ酸ナトリウム40.00g、塩化カルシウム8.95gを含む入浴剤を100g作製した。
【0044】
【表7】
Figure 0003827259
【0045】
【発明の効果】
以上の如く、本発明により、皮膚表皮層内部で表皮細胞の角質化を促進し、皮膚バリアー機能を改善することにより、アトピー性皮膚炎、乾癬を始め、乾皮症、肌荒れ、頭皮のフケ症、さらに***の荒れなどの皮膚疾患の改善に有効な表皮角質化促進剤を提供できることは明らかである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an epidermis keratinization promoter comprising as active ingredients silicic acid-related substances such as silicic acid, metasilicic acid, orthosilicic acid, water glass and the like, and calcium such as calcium chloride and calcium carbonate. More specifically, it improves skin barrier function by promoting keratinization of epidermal cells, and is effective in improving various skin diseases such as atopic dermatitis, psoriasis, psoriasis, rough skin, scalp dandruff, and rough lips. Further, the present invention relates to an epidermal keratinization promoter containing silicate-related substances and calcium as active ingredients.
[0002]
[Prior art]
The stratum corneum in the healthy skin epidermis has an excellent barrier function, prevents moisture evaporation in the body, prevents foreign substances such as foreign antigens from entering the body, and prevents external stimuli from being transmitted to the body. Plays an important role in defense. In contrast, various skin diseases such as atopic dermatitis, psoriasis, psoriasis, rough skin, scalp dandruff, and rough lips are known to prevent the formation of a healthy stratum corneum (J Soc.Cosmet.Chem.Japan, 23, 1, 5, 1989).
[0003]
This stratum corneum dysplasia, or keratokeratosis, causes a decrease in the barrier function of the skin, facilitating the transpiration of water, the entry of foreign substances, and the transmission of external stimuli into the body. This is thought to lead to the initiation or deterioration of
[0004]
In order to prevent such skin diseases and maintain healthy skin, it is conceivable to normalize skin troubles by administering certain components. Conventionally, as a main method for the above purpose, a moisturizing component has been administered to prevent the skin from being dried and moisturize.
[0005]
However, the conventional method generally replenishes the keratinous surface or partially replenishes the moisturizing component, and its effect remains temporary and provides a skin barrier recovery effect continuously. (Toshiyuki Takemura: Pharmacia, 28, 1, 1992), a solution to this problem was desired.
[0006]
[Problems to be solved by the invention]
In view of such circumstances, the present inventors have been diligently searching for cultured epidermal cells with the intention of promoting keratinization of the epidermal cells themselves. When we examined hot spring waters in various places, we found that the hot spring water containing metasilicate and calcium in high concentrations strongly promotes keratinization of epidermal cells.
[0007]
As a result of further investigations, the present inventors have completed the present invention by finding a strong keratinization promoting action due to the coexistence of silicate-related substances and calcium. Its purpose is to promote keratinization of epidermal cells, thereby preventing various skin diseases such as atopic dermatitis, psoriasis, psoriasis, rough skin, scalp dandruff, rough lips, and restoration of barrier function. It is in providing the epidermis keratinization promoter which has an effect.
[0008]
[Means for Solving the Problems]
The above object is achieved by an epidermal keratinization promoter characterized by containing a silicate-related substance and calcium.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail.
[0010]
The silicic acid-related substance that is a constituent of the present invention refers to silicic acid and silicate. Specifically, for example, metasilicic acid, orthosilicic acid, metadisilicic acid, metatrisilicic acid, water glass, or a chemically possible salt thereof, specifically, sodium salt, potassium salt, magnesium salt, aluminum salt, Examples thereof include salts such as calcium salts, and more specifically, sodium metasilicate, sodium silicate, potassium silicate, sodium orthosilicate, and the like.
[0011]
Silicic acid is insoluble in water, metasilicic acid, orthosilicic acid, metadisilicic acid, metatrisilicic acid is present only in solution, silicic acid, metasilicic acid, orthosilicic acid, metadisilicic acid, meta Since the magnesium salt of trisilicate is also insoluble in water, the silicate-related substances used in the epidermal keratinization promoter of the present invention are sodium metasilicate, sodium silicate, potassium silicate, sodium orthosilicate, water glass. Is more preferable because it is easy to use.
[0012]
Moreover, when using the silicic acid related substance which is a component of the present invention in the form of an aqueous solution such as cosmetics as an epidermal keratinization accelerator, an acid is further contained in addition to these, and the pH is adjusted to 2 to 10. Is preferred. Even in the case of a solid form such as a bath agent, it is preferable to adjust an acid to be contained so that the pH in the state of use is 2 to 10 even if it becomes an aqueous solution at the time of use.
[0013]
The acid used for adjusting the pH is not particularly limited, and specific examples include acidic amino acids such as citric acid, acetic acid, malic acid, organic acids, formic acid, aspartic acid, hydrochloric acid, sulfuric acid and the like. It is done.
[0014]
The amount of the silicic acid-related substance to be added to the composition varies depending on the use and dosage form, but when using a use or dosage form such as a topical skin preparation, cosmetic or bathing agent, the total amount is 0.1. -99 wt% is preferable, and 0.1-50 wt% is particularly preferable. Furthermore, the molar ratio of calcium per unit silicon is preferably 10 or more.
[0015]
The dosage of the silicate-related substance varies depending on the age, weight, symptoms, administration method, etc. of the patient or the person with keratinization, but when applied to an external skin preparation or cosmetic, 1 Formulated so that 1 to 50 mg can be administered per batch, or when applied to a bathing agent, if bathing for 10 to 30 minutes per day, mix so that the concentration in the hot water bath is 1 to 5000 mg / l. Is preferred.
Moreover, when adding and using to a cultured cell system, it is preferable to add 0.1-100,000 micromol.
[0016]
Similarly, calcium that is a constituent of the present invention can be suitably used that dissolves in water and emits calcium ions. Specific examples include calcium chloride, calcium hydroxide, and calcium carbonate.
[0017]
The amount of calcium to be added to the composition varies depending on the application and dosage form, but is preferably 0.1 to 99% by weight, particularly 0.1 to 99% by weight based on the total amount of the external preparation for skin, cosmetics, bathing agent, and the like. 50% by weight is preferred.
[0018]
The dose of calcium varies depending on the age, weight, symptoms, administration method, etc. of the patient or the person with keratinization, but when applied to an external preparation for skin or cosmetics, it is 1 per dose by transdermal administration. When blended so that -50 mg can be administered or applied to a bath agent, when bathing for 10-30 minutes per day, it is preferable to blend so that the concentration in the hot water bath is 1-5000 mg / l. .
Moreover, when adding and using for a cultured cell system, it is preferable to add 0.1-10 mM.
[0019]
As a form when applying the epidermal keratinization promoter of the present invention comprising these two compounds, a solid silicate-related substance and a calcium composition, or these are diluted with water, neutralized water, acidic water or the like. And those obtained by appropriately adding a preservative such as methylparaben to the diluted product.
[0020]
The epidermal keratinization promoter of the present invention is transdermally used together with commonly used known ingredients such as commonly used medically acceptable ingredients, skin external preparations, cosmetics or bathing agents, depending on the purpose of use. It can mix | blend with an application composition.
[0021]
【Example】
Hereinafter, the embodiment will be described in detail. Prior to the examples, a keratinization promotion test of silicate-related substances and calcium will be described.
[0022]
Test Example 1 (Keratinization promotion test)
(1) Method (a) Cultured epidermal cells Commercially available human epidermal cells (Cascade Biology) were used.
[0023]
(B) As a medium for cell culture, MCDB153HAA medium (manufactured by Kyokuto) was used as a base, and hydrocortisone (0.5 μM), ethanolamine (0.1 mM), phosphoethanolamine (0.1 mM), K-GM medium supplemented with insulin (5 μg / ml) and EGF (epidermal growth factor: 10 ng / ml) was used. When cells are grown and cultured, BPE (cattle pituitary extract) (Cascade)
Biology) (4 μl / ml medium) was used.
[0024]
(C) Preparation of Hepes buffer solution Hepes 7.15 g, glucose 1.8 g, potassium chloride 0.22 g, sodium chloride 7.7 g, disodium hydrogenphosphate dodecahydrate 0.27 g were dissolved in purified water. After adjusting the pH to 7.4 with an aqueous sodium hydroxide solution, the volume was adjusted to 1 liter.
[0025]
(D) Cell culture The number of normal human epidermal cells is adjusted to 1 × 10 4 cells / ml in MCDB153HAA medium (BPE added), and 1 ml is seeded on a 24-well collagen-coated plate (Corning), and 95%. Static culture was performed at 37 ° C. for 4 days in an atmosphere of air (V / V) -5% (V / V) carbon dioxide gas. Then, it replaced | exchanged for the MCDB153HAA culture medium (BPE addition: 0.4 microliter / ml culture medium) containing epidermal keratinization promoters, such as a silicic acid related substance and calcium which are the structural components of this invention. As a control, MCDB153HAA medium (BPE added: 0.4 μl / ml medium) was used. Thereafter, the cells were statically cultured at 37 ° C. for 5 days in an atmosphere of 95% air (V / V) -5% (V / V) carbon dioxide gas. During this period, the medium was changed every two days.
[0026]
(F) Measurement of corneal membrane-forming ability After culture, the culture supernatant was removed by aspiration, washed twice with Hepes buffer, and the cells were detached by trypsin treatment, and the total number of cells was measured. Thereafter, the remaining cells were allowed to stand in 500 μl of a medium containing 20 μg / ml calcium ionophore (A23187) and 1.25 mM calcium ion at 37 ° C. for 2 hours, and further 1% SDS (sodium lauryl sulfate) / 20 mM DTT ( Cells were dissolved in a dithiothreitol solution and heat treated at 100 ° C. for 5 minutes. After heat treatment, the number of insolubilized cells (the number of keratinized cells) was counted. Keratinization rate (%) = (number of keratinized cells / total number of cells) × 100, and the result was expressed as a keratinization promotion rate when the control cornification rate was 100.
[0027]
(2) Results Tables 1 and 2 show the effects of the silicate-related substances and calcium used in Test Example 1. Compared with the drug-free control, the epidermal cell keratin rate was increased in a concentration-dependent manner in the culture with sodium metasilicate, sodium silicate, and calcium chloride. It was found that silicate-related substances and calcium promote keratinization of human epidermal cells. Furthermore, in the coexistence of a silicate-related substance and calcium, a high keratinization promotion of human epidermal cells per se was observed especially when the silicon / calcium molar ratio was 0.001 or less.
[0028]
[Table 1]
Figure 0003827259
[0029]
[Table 2]
Figure 0003827259
[0030]
Example 1
12.2 mg of sodium metasilicate was dissolved in 9 ml of 20 mM hydrochloric acid solution, the pH was neutralized with 1N sodium hydroxide, 10 μl of 1M calcium chloride solution was added, and the volume was made up to 10 ml with purified water. It was sterilized by filtration with a nitrocellulose membrane having a pore size of 0.2 μm (manufactured by Advantech Toyo Co., Ltd., DISMIC-25) to obtain an epidermal keratinization accelerator.
[0031]
Example 2
An epidermal keratinization promoter was prepared in the same manner as in Example 1 except that 15.4 mg of potassium silicate was used.
[0032]
Example 3
A skin keratinization promoter was prepared in the same manner as in Example 1 except that 18.4 mg of sodium orthosilicate and 9 ml of 40 mM hydrochloric acid solution were used.
[0033]
Example 4
An epidermal keratinization promoter was prepared in the same manner as in Example 1 except that 16.9 mg of water glass was used.
[0034]
Examples 5-8
The epidermal keratinization promoters of Examples 1, 2, 3, and 4 were each diluted 10-fold with a 0.1 wt% methylparaben solution to prepare epidermal keratinization promoters of Examples 5, 6, 7, and 8. .
[0035]
Application Examples 1-4 (Lotion)
The epidermis keratinization promoter of any of Examples 1, 2, 3 and 4, sodium lauryl sulfate, and purified water were prepared in the amounts shown in Table 3, heated to 80 ° C. in a hot water bath, and mixed. Beeswax, cetanol, and concentrated glycerin were prepared in the amounts shown in Table 3, heated to 80 ° C. and mixed, and the warmed epidermal keratinization accelerator mixture was gradually added to the mixture with stirring. The mixture was vigorously stirred (2500 rpm) for 2.5 minutes. The mixture was gradually cooled to room temperature with stirring to obtain lotions of application examples 1, 2, 3, and 4 containing 6 mM metasilicate in 100 g.
[0036]
[Table 3]
Figure 0003827259
[0037]
Application examples 5-8 (cream)
Ingredient (3) in Table 4 is uniformly mixed and dissolved at about 80 ° C., added and emulsified in component (1) which has been uniformly mixed and dissolved at about 80 ° C., and then uniformly mixed and dissolved at about 50 ° C. Ingredient (2) was added and cooled to about 30 ° C. to prepare creams of application examples 5, 6, 7 and 8.
[0038]
[Table 4]
Figure 0003827259
[0039]
Application examples 9-12 (oily hair artnic)
Using 37.2 g of the epidermal keratinization promoter of any of Examples 5, 6, 7, and 8, and mixing and stirring the hydrophilic component and the lipophilic component according to the composition of Table 5, Formulation Examples 9, 10, 11, Obtained 12 oily artnics.
[0040]
[Table 5]
Figure 0003827259
[0041]
Application examples 13-16 (hair cream)
The hydrophilic components shown in the following Table 6 containing the epidermal keratinization promoter in any of Examples 1, 2, 3 and 4 were uniformly mixed and dissolved at about 80 ° C., and previously mixed and dissolved uniformly at about 80 ° C. After emulsification by adding to the oleophilic component, the flavor component was added at about 50 ° C., and stirring was continued until the temperature reached about 30 ° C. to prepare hair creams of Formulation Examples 13, 14, 15, and 16.
[0042]
[Table 6]
Figure 0003827259
[0043]
Application Example 17
A bath composition having the formulation shown in Table 7 was prepared by a conventional method of mixing powder, and 100 g of a bath containing 40.00 g of sodium metasilicate and 8.95 g of calcium chloride was prepared.
[0044]
[Table 7]
Figure 0003827259
[0045]
【The invention's effect】
As described above, according to the present invention, keratinization of epidermal cells is promoted inside the skin epidermis layer, and the skin barrier function is improved. Thus, atopic dermatitis, psoriasis, psoriasis, rough skin, scalp dandruff, etc. Furthermore, it is clear that an epidermis keratinization promoting agent effective in improving skin diseases such as rough lips can be provided.

Claims (4)

ケイ酸関連物質およびカルシウムを含有し、且つ単位ケイ素あたりのカルシウムの含有量がモル比で10以上であることを特徴とする表皮角質化促進剤。 An epidermis keratinization promoter comprising a silicic acid-related substance and calcium , and the content of calcium per unit silicon is 10 or more in molar ratio . ケイ酸関連物質が、ケイ酸,メタケイ酸,オルトケイ酸およびこれらの化学的に可能な塩からなる群から選択されるものである請求項1記載の表皮角質化促進剤。  The epidermal keratinization promoter according to claim 1, wherein the silicic acid-related substance is selected from the group consisting of silicic acid, metasilicic acid, orthosilicic acid and chemically possible salts thereof. ケイ酸関連物質とカルシウムを単位ケイ素あたりのカルシウムをモル比が10以上の割合で含有し、さらに酸を含有することを特徴とする表皮角質化促進剤。 An epidermis keratinization promoter comprising a silicic acid-related substance and calcium in a molar ratio of 10 or more per unit silicon, and further containing an acid . ケイ酸関連物質が、ケイ酸,メタケイ酸,オルトケイ酸およびこれらの化学的に可能な塩からなる群から選択されるものである請求項記載の表皮角質化促進剤。The epidermis keratinization promoter according to claim 3 , wherein the silicic acid-related substance is selected from the group consisting of silicic acid, metasilicic acid, orthosilicic acid and chemically possible salts thereof.
JP14315397A 1997-05-16 1997-05-16 Keratinization promoter Expired - Lifetime JP3827259B2 (en)

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GB2411833A (en) * 2004-03-08 2005-09-14 Skin Salveation Ltd Composition for use in the treatment of dry skin conditions
JP2009292809A (en) * 2008-05-09 2009-12-17 Kracie Home Products Ltd Skin touch feeling improver and skin cosmetic compounded with the same, and method for improving skin touch feeling
JP5219038B2 (en) * 2008-10-28 2013-06-26 学校法人順天堂 Skin keratinization promoter
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