JP3627862B2 - Topical skin preparation - Google Patents

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JP3627862B2
JP3627862B2 JP2002179095A JP2002179095A JP3627862B2 JP 3627862 B2 JP3627862 B2 JP 3627862B2 JP 2002179095 A JP2002179095 A JP 2002179095A JP 2002179095 A JP2002179095 A JP 2002179095A JP 3627862 B2 JP3627862 B2 JP 3627862B2
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cassytha
skin
preparation
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JP2004018497A (en
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由貴 山下
泰三 関
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Noevir Co Ltd
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Noevir Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、優れた効果を有する細胞賦活剤及び抗酸化剤、さらに係る細胞賦活剤及び抗酸化剤を有効成分として配合することにより、皮膚の老化及び肌荒れの防止或いは改善に優れた効果を有する皮膚外用剤に関する。さらに詳しくは、スナヅル属(Cassytha L.)植物抽出物を有効成分とする細胞賦活剤及び抗酸化剤、並びにスナヅル属(Cassytha L.)植物抽出物を配合した老化及び肌荒れ改善用の皮膚外用剤に関する。
【0002】
【従来の技術】
加齢などによる真皮線維芽細胞の機能低下は、コラーゲンやエラスチン等の真皮マトリックスの減少や変性を引き起こし、シワや皮膚の弾性の低下といった老化症状の重要な要因となっている。また、紫外線等の外来ストレスによる酸化傷害も、シワ,シミ,皮膚の弾性の低下といった老化症状の原因となっている。これまでの皮膚外用剤の分野では、係る細胞の機能低下や酸化傷害による老化症状を防止あるいは改善するために、様々な細胞賦活剤や抗酸化剤の検索及び配合検討がなされてきた。細胞賦活剤としては、例えば、ポンカンのエッセンス(特開2001−131045)、ツリガネニンジン属,クサギ及びそれらの抽出物(特開2000−178198)、有機溶媒によるクロレラ抽出物(特開平11−335293)等が知られており、抗酸化剤としては、例えば、キク科へテロテカ属植物抽出物(特開平11−180886)やカユアンギンの抽出物(特開平10−182413)等が知られている。
【0003】
しかし、すでに報告されている生理活性物質は、老化現象の一部の過程にのみ作用している場合が多く、本質的な改善効果としては不十分であると考えられた。また、皮膚外用剤の基剤中に配合した場合、有効な効果を得るにはかなりの高濃度を配合しなければならず、製剤に好ましくない色や臭いを付与してしまう場合があるなど、作用効果や安定性の面ですべてを満足できるものが少ないのが現状であった。
【0004】
【発明が解決しようとする課題】
そこで、本発明においては、優れた効果を有する細胞賦活剤及び抗酸化剤を見出し、さらに係る細胞賦活剤及び抗酸化剤を有効成分として配合することにより、皮膚の老化及び肌荒れの防止或いは改善に優れた効果を有する皮膚外用剤を提供することを目的とした。
【0005】
【課題を解決するための手段】
本発明者らは、皮膚の老化症状や肌荒れの予防や改善に優れた有効成分を見出すために、種々の物質について真皮線維芽細胞及び表皮細胞の賦活作用と抗酸化作用に関する検討を行った。その結果、スナヅル属(Cassytha L.)植物抽出物に優れた真皮線維芽細胞及び表皮細胞の賦活作用と抗酸化作用を見出し、本発明を完成するに至った。
【0006】
スナヅルの利用としては、特開2001−226218にスナヅルの水蒸気蒸留水を含有することを特徴とする化粧料組成物(特開2001−226218)が開示されており、特開2001−226231にスナヅルの育毛剤組成物が開示されている。しかし、スナヅル属(Cassytha L.)植物抽出物が優れた効果を有する細胞賦活剤及び抗酸化剤として機能すること、さらに係る細胞賦活剤及び抗酸化剤を有効成分として皮膚外用剤に配合することにより、皮膚の老化及び肌荒れの防止或いは改善に優れた効果を有することに関しては、本発明により初めて明らかとなったことである。
【0007】
【発明の実施の形態】
スナヅル属(Cassytha L.)植物は、クスノキ科(Lauraceae)の植物で、オーストラリアを中心に約20種が熱帯から亜熱帯地域に分布している。スナヅル属(Cassytha L.)植物は、つる性の多年生草本で、成熟株では根も明瞭な葉もない寄生植物である。これらの特性はクスノキ科では例外的なので、スナヅル科という独立の科とされる場合もあるが、花や果実などの形態からクスノキ科スナヅル亜科の単独属として扱われている。スナヅル属(Cassytha L.)植物としては、スナヅル(Cassytha filiformis L.),ケスナヅル(Cassytha filiformis var. duripraticola),イトスナヅル(Cassytha pergracilis ),カシィサ シリオラタ(Cassytha ciliolata)等が知られている。
【0008】
これらスナヅル属(Cassytha L.)植物を使用する際は、抽出物を用いるのが一般的である。抽出には、スナヅル属(Cassytha L.)植物の茎,葉,花,種子,根,芽,果実などのいずれの部位を用いても構わないが、簡便に利用するには、全草を用いるとよい。抽出の際は、生のまま用いてもよいが、抽出効率を考えると、細切,乾燥,粉砕等の処理を行った後に抽出を行うことが好ましい。抽出は、抽出溶媒に浸漬するか、超臨界流体や亜臨界流体を用いた抽出方法でも行うことができる。抽出効率を上げるため、撹拌や抽出溶媒中でホモジナイズしてもよい。抽出温度としては、5℃程度から抽出溶媒の沸点以下の温度とするのが適切である。抽出時間は抽出溶媒の種類や抽出温度によっても異なるが、1時間〜14日間程度とするのが適切である。
【0009】
抽出溶媒としては、水の他、メタノール,エタノール,プロパノール,イソプロパノール等の低級アルコール、1,3−ブチレングリコール,プロピレングリコール,ジプロピレングリコール,グリセリン等の多価アルコール、エチルエーテル,プロピルエーテル等のエーテル類、酢酸エチル,酢酸ブチル等のエステル類、アセトン,エチルメチルケトン等のケトン類などの溶媒を用いることができ、これらより1種又は2種以上を選択して用いる。また、生理食塩水,リン酸緩衝液,リン酸緩衝生理食塩水等を用いてもよい。さらに、水や二酸化炭素,エチレン,プロピレン,エタノール,メタノール,アンモニアなどの1種又は2種以上の超臨界流体や亜臨界流体を用いてもよい。
【0010】
スナヅル属(Cassytha L.)植物の上記溶媒による抽出物は、そのままでも使用することができるが、濃縮,乾固した物を水や極性溶媒に再度溶解したり、或いはこれらの生理作用を損なわない範囲で脱色,脱臭,脱塩等の精製処理を行ったり、カラムクロマトグラフィー等による分画処理を行った後に用いてもよい。スナヅル属(Cassytha L.)植物の前記抽出物やその処理物及び分画物は、各処理及び分画後に凍結乾燥し、用時に溶媒に溶解して用いることもできる。また、リポソーム等のベシクルやマイクロカプセル等に内包させて用いることもできる。
【0011】
本発明における細胞賦活剤及び抗酸化剤は、上述のスナヅル属(Cassytha L.)植物抽出物を有効成分とする。また、係る細胞賦活剤及び抗酸化剤であるスナヅル属(Cassytha L.)植物抽出物を皮膚外用剤に配合することにより、老化及び肌荒れの予防や改善に優れた効果を発揮する。
【0012】
本発明におけるスナヅル属(Cassytha L.)植物抽出物の配合量は、皮膚外用剤の種類や目的等によって調整することができるが、皮膚外用剤の全量に対して、0.0001〜10.0重量%が好ましく、より好ましくは、0.001〜5.0重量%である。
【0013】
本発明に係る皮膚外用剤は、ローション,乳液,ゲル,クリーム,軟膏剤,粉末,顆粒等、種々の剤型で提供することができる。
【0014】
なお、本発明に係る皮膚外用剤には、スナヅル属(Cassytha L.)植物抽出物の他に、通常医薬品,医薬部外品,皮膚化粧料,洗浄料に配合される、油性成分,保湿剤,粉体,色素,乳化剤,可溶化剤,洗浄剤,紫外線吸収剤,増粘剤,薬剤,香料,樹脂,防菌防黴剤,アルコール類等を適宜配合することができる。また、本発明の効果を損なわない範囲において、他の細胞賦活剤,抗酸化剤,植物抽出物との併用も可能である。
【0015】
【実施例】
さらに実施例により、本発明の特徴について詳細に説明するが、本発明の技術的範囲はこれによってなんら限定されるものではない。
【0016】
まず、本発明のスナヅル属(Cassytha L.)植物抽出物の調製方法について示す。
【0017】
[調製方法1]
スナヅル属(Cassytha L.)植物の乾燥粉砕物1kgに50重量%エタノール水溶液を10リットル加え、室温で7日間浸漬した。抽出液をろ過して回収し、溶媒を除去した後、スナヅル属(Cassytha L.)植物抽出物を得た。
【0018】
[調製方法2]
スナヅル属(Cassytha L.)植物の乾燥粉砕物1kgに水を9リットル加え、90℃にて6時間還流して抽出した。抽出液をろ過して回収し、溶媒を除去した後、スナヅル属(Cassytha L.)植物抽出物を得た。
【0019】
[調製方法3]
スナヅル属(Cassytha L.)植物の乾燥粉砕物1kgにメタノールを9リットル加え、室温で7日間浸漬した。抽出液をろ過して回収し、溶媒を除去した後、スナヅル属(Cassytha L.)植物抽出物を得た。
【0020】
[調製方法4]
超臨界抽出装置にスナヅル属(Cassytha L.)植物を投入し、40℃において15MPaの気圧下で二酸化炭素の超臨界流体を用いて抽出した。抽出物を回収し、スナヅル属(Cassytha L.)植物抽出物を得た。
【0021】
次に、スナヅル属(Cassytha L.)植物抽出物の真皮線維芽細胞の賦活作用を示す。
【0022】
評価は、以下の手順で行った。正常ヒト真皮線維芽細胞を1ウェル当たり2.0×10個となるように96穴マイクロプレートに播種した。播種培地には、ダルベッコ改変イーグル培地(DMEM)に1%のウシ胎児血清を添加したものを用いた。24時間培養後、スナヅル抽出物を添加した試験培地に交換し、さらに48時間培養した。次いで3−(4,5−ジメチル−2−チアゾリル)−2,5−ジフェニルテトラゾリウムブロミド(MTT)を400μg/mL含有する培地に交換して2時間培養し、テトラゾリウム環の開環により生じるフォルマザンを2−プロパノールにて抽出し、マイクロプレートリーダーにて550nmの吸光度を測定した。同時に濁度として650nmにおける吸光度を測定し、両測定値の差により細胞賦活作用を評価した。また、測定法の妥当性を確認するために、スナヅル抽出物を添加した培地の代わりに、ダルベッコ改変イーグル培地(DMEM)に5%のウシ胎児血清を添加したものを陽性コントロールとし、測定を行った。得られた評価結果を、スナヅル抽出物が無添加の場合の細胞賦活作用を100とした相対値にて表1に示す。
【0023】
【表1】

Figure 0003627862
【0024】
表1より、スナヅル抽出物を0.25〜1.00mg/mL添加した場合に、無添加の場合と比較して、危険率1%未満で有意な線維芽細胞の賦活作用が認められた。このことから、スナヅル抽出物は、優れた線維芽細胞賦活作用を有することが明らかとなった。
【0025】
次に、スナヅル属(Cassytha L.)植物抽出物の表皮細胞の賦活作用について示す。
【0026】
評価は、以下の手順で行った。正常ヒト表皮細胞を1ウェル当たり2.0×10個となるように96穴マイクロプレートに播種した。播種培地には、市販のクラボウ社製Humedia−KG2を用いた。24時間培養後、スナヅルの全草から調製方法1により調製したスナヅル抽出物を添加した試験培地に交換し、さらに24時間培養した。次いで3−(4,5−ジメチル−2−チアゾリル)−2,5−ジフェニルテトラゾリウムブロミド(MTT)を100μg/mL含有する培地に交換して2時間培養し、テトラゾリウム環の開環により生じるフォルマザンを2−プロパノールにて抽出し、マイクロプレートリーダーにて550nmの吸光度を測定した。同時に濁度として650nmにおける吸光度を測定し、両測定値の差により細胞賦活作用を評価した。評価結果を、スナヅル抽出物が無添加の場合の細胞賦活作用を100とした場合の相対値にて表2に示す。
【0027】
【表2】
Figure 0003627862
【0028】
表2より、スナヅル抽出物を1.00〜5.00mg/mL添加した場合に、無添加の場合と比較して危険率1%未満で有意な表皮細胞の賦活作用が認められた。このことから、スナヅル抽出物は、優れた表皮細胞の賦活作用を有することが明らかとなった。
【0029】
次に、スナヅル属(Cassytha L.)植物抽出物の抗酸化作用について示す。
【0030】
評価は、以下の手順で行った。50重量%エタノール水溶液にて1.0mg/mLに希釈したスナヅル抽出物溶液を96穴マイクロプレートに100μL添加した。次に、0.2mMの濃度になるようにエタノールにて調製した1,1−ジフェニル−2−ピクリルヒドラジル(DPPH)溶液を96穴マイクロプレートに100μL添加した。攪拌しながら暗所に放置し、24時間後に516nmの吸光度を測定した。スナヅル抽出物が無添加の場合の吸光度を(A)、スナヅル抽出物溶液の吸光度を(B)としたとき、式(1)の値をラジカル消去率とした。
式(1) {1−(B)/(A)}×100(%)
スナヅルの全草より調製方法1によって得られた抽出物の実験結果を表3に示す。
【0031】
【表3】
Figure 0003627862
【0032】
表3より明らかなように、スナヅル抽出物には優れた抗酸化作用があることが分かった。
【0033】
続いて、本発明に係るスナヅル属(Cassytha L.)植物抽出物を配合した実施例の処方を示す。
【0034】
[実施例1〜4]乳液
Figure 0003627862
製法:(1)〜(6)の油相成分を80℃にて加熱溶解する。一方(7)〜(10)の水相成分を80℃にて加熱溶解する。これに前記油相成分を攪拌しながら加え、ホモジナイザーにより均一に乳化する。乳化終了後、冷却を開始し、(11)と(12)を順次加え、均一に混合する。
【0035】
【表4】
Figure 0003627862
【0036】
[実施例5]化粧水
(1)エタノール 15.0(重量%)
(2)ポリオキシエチレン(40E.O.)硬化ヒマシ油 0.3
(3)香料 0.1
(4)精製水 81.36
(5)クエン酸 0.02
(6)クエン酸ナトリウム 0.1
(7)グリセリン 3.0
(8)ヒドロキシエチルセルロース 0.1
(9)スナヅル抽出物(花)[調製方法3] 0.02
製法:(1)に(2)及び(3)を溶解する。溶解後、(4)〜(8)を順次添加した後、十分に攪拌し、(9)を加え、均一に混合する。
【0037】
[実施例6]クリーム
(1)スクワラン 10.0(重量%)
(2)ステアリン酸 2.0
(3)水素添加パーム核油 0.5
(4)水素添加大豆リン脂質 0.1
(5)セタノール 3.6
(6)親油型モノステアリン酸グリセリン 2.0
(7)グリセリン 10.0
(8)パラオキシ安息香酸メチル 0.1
(9)アルギニン(20重量%水溶液) 15.0
(10)精製水 40.7
(11)カルボキシビニルポリマー(1重量%水溶液) 15.0
(12)スナヅル抽出物(全草)[調製方法1] 1.0
製法:(1)〜(6)の油相成分を80℃にて加熱溶解する。一方(7)〜(11)の水相成分を80℃にて加熱溶解する。これに前記油相成分を攪拌しながら加え、ホモジナイザーにより均一に乳化する。乳化終了後、冷却を開始し、40℃にて(12)を加え、均一に混合する。
【0038】
[実施例7]美容液
Figure 0003627862
製法:(1)〜(6)の水相成分を混合し、75℃にて加熱溶解する。一方、(7)〜(14)の油相成分を混合し、75℃にて加熱溶解する。次いで、上記水相成分に油相成分を添加して予備乳化を行った後、ホモミキサーにて均一に乳化する。乳化終了後に冷却を開始し、50℃にて(15)を加える。さらに40℃まで冷却し、(16)を加え、均一に混合する。
【0039】
[実施例8]水性ジェル
(1)カルボキシビニルポリマー 0.5(重量%)
(2)精製水 86.3
(3)水酸化ナトリウム(10重量%水溶液) 0.5
(4)エタノール 10.0
(5)パラオキシ安息香酸メチル 0.1
(6)香料 0.1
(7)スナヅル抽出物(果実)[調製方法4] 0.1
(8)ポリオキシエチレン(60E.O.)硬化ヒマシ油 0.1
(9)グリセリン 2.0
(10)カシィサ シリオラタ抽出物(全草)[調製方法3] 0.1
(11)ケスナヅル抽出物(花)[調製方法1] 0.1
(12)イトスナヅル抽出物(茎)[調製方法1] 0.1
製法:(1)を(2)に加え、均一に攪拌した後、(3)を加える。均一に攪拌した後,(4)に予め溶解した(5)を加える。均一に攪拌した後、予め混合しておいた(6)〜(8)を加える。均一に攪拌した後、(9)〜(12)を順次加え、均一に混合する。
【0040】
[実施例9]クレンジング料
(1)スクワラン 81.95
(2)イソステアリン酸ポリオキシエチレングリセリル 15.0
(3)精製水 3.0
(4)スナヅル抽出物(花)[調製方法4] 0.02
(5)イトスナヅル抽出物(茎)[調製方法4] 0.03
製法:(1)と(2)を均一に溶解する。これに、(3)〜(5)を順次加え、均一に混合する。
【0041】
[実施例10]洗顔フォーム
(1)ステアリン酸 16.0(重量%)
(2)ミリスチン酸 16.0
(3)親油型モノステアリン酸グリセリン 2.0
(4)グリセリン 20.0
(5)水酸化ナトリウム 7.5
(6)ヤシ油脂肪酸アミドプロピルベタイン 1.0
(7)精製水 36.5
(8)ケスナヅル抽出物(茎)[調製方法3] 0.5
(9)カシィサ シリオラタ抽出物(茎)[調製方法2] 0.5
製法:(1)〜(4)の油相成分を80℃にて加熱溶解する。一方(5)〜(7)の水相成分を80℃にて加熱溶解し、油相成分と均一に混合撹拌する。冷却を開始し、40℃にて(8)と(9)を加え、均一に混合する。
【0042】
[実施例11]メイクアップベースクリーム
(1)スクワラン 10.0(重量%)
(2)セタノール 2.0
(3)グリセリントリ−2−エチルヘキサン酸エステル 2.5
(4)親油型モノステアリン酸グリセリル 1.0
(5)プロピレングリコール 11.0
(6)ショ糖脂肪酸エステル 1.3
(7)精製水 70.4
(8)酸化チタン 1.0
(9)ベンガラ 0.1
(10)黄酸化鉄 0.4
(11)香料 0.1
(12)スナヅル抽出物(茎)[調製方法2] 0.1
(13)ケスナヅル抽出物(茎)[調製方法1] 0.1
製法:(1)〜(4)の油相成分を混合し、75℃にて加熱溶解後する。一方、(5)〜(7)の水相成分を混合し、75℃にて加熱溶解し、これに(8)〜(10)の顔料を加え、ホモミキサーにて均一に分散させる。この水相成分に前記油相成分を加え、ホモミキサーにて乳化する。乳化終了後に冷却を開始し、40℃にて(11)〜(13)の成分を加え、均一に混合する。
【0043】
Figure 0003627862
製法:(1)〜(6)の油相成分を混合し、75℃にて加熱溶解する。一方、(7)〜(10)の水相成分を混合し、75℃にて加熱溶解し、これに(11)〜(15)の顔料を加え、ホモミキサーにて均一に分散する。油相成分を加え、乳化を行う。乳化終了後に冷却を開始し、40℃にて(16)〜(18)の成分を順次加え、均一に混合する。
【0044】
[実施例13]油中水型エモリエントクリーム
(1)流動パラフィン 30.0(重量%)
(2)マイクロクリスタリンワックス 2.0
(3)ワセリン 5.0
(4)ジグリセリンオレイン酸エステル 5.0
(5)塩化ナトリウム 1.3
(6)塩化カリウム 0.1
(7)プロピレングリコール 3.0
(8)1,3−ブチレングリコール 5.0
(9)パラオキシ安息香酸メチル 0.1
(10)スナヅル抽出物(茎)[調製方法1] 0.5
(11)精製水 45.9
(12)香料 0.1
(13)ケスナヅル抽出物(花)[調製方法4] 2.0
製法:(5)と(6)を(11)の一部に溶解して50℃とし、50℃に加熱した(4)に撹拌しながら徐々に加える。これを混合した後、70℃にて加熱溶解した(1)〜(3)に均一に分散する。これに(7)〜(10)を(11)の残部に70℃にて加熱溶解したものを撹拌しながら加え、ホモミキサーにて乳化する。乳化終了後に冷却を開始し、40℃にて(12)と(13)を加え、均一に混合する。
【0045】
[実施例15]パック
(1)精製水 68.9(重量%)
(2)ポリビニルアルコール 12.0
(3)エタノール 10.0
(4)グリセリン 5.0
(5)ポリエチレングリコール(平均分子量1000) 2.0
(6)カシィサ シリオラタ抽出物(茎)[調製方法1] 1.0
(7)スナヅル抽出物(花)[調製方法2] 1.0
(8)香料 0.1
製法:(2)と(3)を混合し、80℃に加温した後、80℃に加温した(1)に溶解する。均一に溶解した後、(4)〜(5)を加え、攪拌しながら冷却を開始する。40℃まで冷却し、(6)〜(8)を加え、均一に混合する。
【0046】
[実施例17]入浴剤
(1)香料 0.3(重量%)
(2)スナヅル抽出物(茎)[調製方法1] 0.5
(3)イトスナヅル抽出物(茎)[調製方法3] 0.5
(4)炭酸水素ナトリウム 50.0
(5)硫酸ナトリウム 48.7
製法:(1)〜(5)を均一に混合する。
【0047】
本発明の実施例1〜8について使用試験を行い、シワ,タルミ,肌のハリ,及び肌荒れの改善効果を評価した。その際、実施例1において、配合したスナヅル抽出物を精製水に代替し、比較例1として同時に使用試験を行った。
【0048】
各試料について、シワ,タルミ,肌のハリの低下,及び肌荒れといった症状が顕著に認められる50〜60才代の男女パネラー各20名にブラインドにて1カ月間使用させ、使用前後の皮膚状態の変化を観察して評価した。皮膚症状の指標として、シワ,タルミ,肌のハリ,肌荒れについて、「改善」,「やや改善」,「変化なし」の三段階で評価し、表5に各評価を得たパネラー数にて示した。
【0049】
【表5】
Figure 0003627862
【0050】
表5より、シワ,タルミ,肌のハリ,及び肌荒れについて、スナヅル属(Cassytha L.)植物抽出物を含有しない比較例使用群においては、半数以上のパネラーに改善が認められなかったが、スナヅル属(Cassytha L.)植物抽出物を配合した実施例使用群においては、6割以上のパネラーに明確な改善が認められた。
【0051】
以上のように、本発明の実施例においては、従来の比較例よりも、シワ,タルミ,肌のハリ,及び肌荒れといった皮膚症状の改善に優れた効果を有していた。
【0052】
【発明の効果】
以上詳述したように、本発明により、優れた効果を有する細胞賦活剤及び抗酸化剤を得ることが出来た。また、係る細胞賦活剤及び抗酸化剤を有効成分として配合することにより、皮膚の老化及び肌荒れの防止或いは改善に優れた効果を有する皮膚外用剤を得ることが出来た。[0001]
BACKGROUND OF THE INVENTION
The present invention has an excellent effect in preventing or improving skin aging and rough skin by blending as an active ingredient a cell activator and an antioxidant having an excellent effect, and further such cell activator and antioxidant as active ingredients. It relates to an external preparation for skin. In more detail, the cell activator and antioxidant which use a genus Snass ( Cassytha L.) plant extract as an active ingredient, and the skin external preparation for the improvement of aging and rough skin which mix | blended Snass genus ( Cassytha L.) plant extract About.
[0002]
[Prior art]
A decrease in the function of dermal fibroblasts due to aging causes a decrease or degeneration of the dermal matrix such as collagen and elastin, and is an important factor of aging symptoms such as wrinkles and a decrease in skin elasticity. In addition, oxidative damage due to external stress such as ultraviolet rays also causes aging symptoms such as wrinkles, spots, and a decrease in skin elasticity. Until now, in the field of topical skin preparations, various cell activators and antioxidants have been searched and formulated for the purpose of preventing or improving the aging symptoms due to such functional deterioration of cells and oxidative damage. Examples of the cell activator include ponkan essence (Japanese Patent Laid-Open No. 2001-131405), genus genus, peony and extracts thereof (Japanese Patent Laid-Open No. 2000-178198), chlorella extract using an organic solvent (Japanese Patent Laid-Open No. 11-335293), and the like. As the antioxidant, for example, an extract of the genus Heteroteca genus plant (JP-A-11-180886), an extract of cayuangin (JP-A-10-182413) and the like are known.
[0003]
However, the already reported physiologically active substances often act only in a part of the aging phenomenon, and it was considered that the essential improvement effect was insufficient. In addition, when blended into the base of the external preparation for skin, to obtain an effective effect, it must be blended in a fairly high concentration, and may give an unfavorable color and odor to the formulation, etc. At present, there are few things that can satisfy all of the effects and stability.
[0004]
[Problems to be solved by the invention]
Therefore, in the present invention, by finding a cell activator and an antioxidant having an excellent effect, and further blending such cell activator and antioxidant as active ingredients, it is possible to prevent or improve skin aging and rough skin. An object of the present invention is to provide a skin external preparation having an excellent effect.
[0005]
[Means for Solving the Problems]
In order to find an effective ingredient excellent in the prevention and improvement of skin aging symptoms and rough skin, the present inventors have examined the activation and antioxidant effects of various dermal fibroblasts and epidermal cells. As a result, the present inventors have found an excellent dermal fibroblast and epidermal cell activating effect and antioxidant effect in the genus Cassytha L. and have completed the present invention.
[0006]
As the use of the snack, JP-A No. 2001-226218 discloses a cosmetic composition (JP-A No. 2001-226218) characterized by containing a steam-distilled water of the snack. A hair restorer composition is disclosed. However, Snassula L. ( Cassytha L.) plant extract functions as a cell activator and an antioxidant having an excellent effect, and further, such a cell activator and an antioxidant are added to an external skin preparation as active ingredients. Thus, the present invention has been made clear for the first time with respect to having an excellent effect in preventing or improving skin aging and rough skin.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Cassytha L. is a plant belonging to the family Lauraceae, and about 20 species are distributed from tropical to subtropical areas, mainly in Australia. Cassytha L. plants are climbing perennial herbs and are parasitic plants with no roots or clear leaves in mature strains. Since these characteristics are exceptional in the camphor family, they may be regarded as an independent family called the snail family, but are treated as a single genus of the camphor family subfamily from the form of flowers and fruits. The cassytha (Cassytha L.) plants, cassytha filiformis (Cassytha filiformis L.), cassytha pubescens (Cassytha filiformis var. Duripraticola), Itosunadzuru (Cassytha pergracilis), Kashiisa Shiriorata (Cassytha ciliolata) and the like are known.
[0008]
When using these genus Cassytha L., it is common to use an extract. For extraction, any part of the stem, leaf, flower, seed, root, bud, fruit, etc. of the genus Cassytha L. may be used, but whole plant is used for convenient use. Good. In the extraction, it may be used as it is, but considering the extraction efficiency, it is preferable to perform the extraction after performing processing such as shredding, drying, and pulverization. The extraction can be performed by immersing in an extraction solvent or by an extraction method using a supercritical fluid or a subcritical fluid. In order to increase the extraction efficiency, the mixture may be homogenized in stirring or an extraction solvent. The extraction temperature is suitably about 5 ° C. to the boiling point of the extraction solvent. The extraction time varies depending on the type of extraction solvent and the extraction temperature, but it is appropriate to set it to about 1 hour to 14 days.
[0009]
Extraction solvents include water, lower alcohols such as methanol, ethanol, propanol, and isopropanol, polyhydric alcohols such as 1,3-butylene glycol, propylene glycol, dipropylene glycol, and glycerin, and ethers such as ethyl ether and propyl ether. And solvents such as esters such as ethyl acetate and butyl acetate, and ketones such as acetone and ethyl methyl ketone can be used, and one or more of these can be selected and used. Further, physiological saline, phosphate buffer, phosphate buffered saline, or the like may be used. Furthermore, you may use 1 type, or 2 or more types of supercritical fluids and subcritical fluids, such as water, a carbon dioxide, ethylene, propylene, ethanol, methanol, ammonia.
[0010]
An extract of the above-mentioned solvent of the genus Cassytha L. can be used as it is, but the concentrated and dried product is not dissolved again in water or a polar solvent, or these physiological functions are not impaired. It may be used after performing purification treatment such as decolorization, deodorization, and desalting within a range, or fractionation treatment by column chromatography or the like. The extract of the genus Cassytha ( Cassytha L.) and the treated product and fraction thereof can be freeze-dried after each treatment and fractionation and dissolved in a solvent before use. It can also be used by encapsulating in vesicles such as liposomes or microcapsules.
[0011]
The cell activator and antioxidant in the present invention contain the above-mentioned Cassytha L. plant extract as an active ingredient. Moreover, the effect | action excellent in prevention and improvement of an aging and rough skin is exhibited by mix | blending the cell extract and Casytha L. plant extract which is an antioxidant with the skin external preparation.
[0012]
Although the compounding quantity of the genus Snass (L.) plant extract in this invention can be adjusted with the kind, purpose, etc. of a skin external preparation, it is 0.0001-10.0 with respect to the whole quantity of a skin external preparation. % By weight is preferred, and more preferably 0.001 to 5.0% by weight.
[0013]
The external preparation for skin according to the present invention can be provided in various dosage forms such as lotion, emulsion, gel, cream, ointment, powder, granule and the like.
[0014]
The external preparation for skin according to the present invention includes oily ingredients and moisturizers usually incorporated in pharmaceuticals, quasi-drugs, skin cosmetics, and detergents in addition to the plant extract of Cassytha L. , Powders, pigments, emulsifiers, solubilizers, detergents, ultraviolet absorbers, thickeners, drugs, fragrances, resins, antibacterial and antifungal agents, alcohols, and the like can be appropriately blended. Moreover, in the range which does not impair the effect of this invention, combined use with another cell activator, an antioxidant, and a plant extract is also possible.
[0015]
【Example】
Further, the features of the present invention will be described in detail by way of examples, but the technical scope of the present invention is not limited by these.
[0016]
First, the preparation method of the genus Cassytha L. of this invention is shown.
[0017]
[Preparation Method 1]
10 liters of a 50 wt% ethanol aqueous solution was added to 1 kg of a dry pulverized product of a genus Cassytha L. and immersed for 7 days at room temperature. The extract was collected by filtration, and after removing the solvent, a genus Cassytha L. was obtained.
[0018]
[Preparation Method 2]
Nine liters of water was added to 1 kg of a dry pulverized product of the genus Cassytha L. and extracted by refluxing at 90 ° C. for 6 hours. The extract was collected by filtration, and after removing the solvent, a genus Cassytha L. was obtained.
[0019]
[Preparation Method 3]
Nine liters of methanol was added to 1 kg of a dry pulverized product of a genus Cassytha L. and immersed for 7 days at room temperature. The extract was collected by filtration, and after removing the solvent, a genus Cassytha L. was obtained.
[0020]
[Preparation Method 4]
A supercritical extraction apparatus was charged with a Cassytha L. plant and extracted using a supercritical fluid of carbon dioxide at 40 ° C. under a pressure of 15 MPa. The extract was recovered to obtain a Cassytha L. plant extract.
[0021]
Next, the dermal fibroblast activation effect of the Cassytha L. plant extract is shown.
[0022]
The evaluation was performed according to the following procedure. Normal human dermal fibroblasts were seeded in a 96-well microplate at 2.0 × 10 4 cells per well. The seeding medium used was Dulbecco's modified Eagle medium (DMEM) supplemented with 1% fetal bovine serum. After culturing for 24 hours, the culture medium was replaced with a test medium supplemented with a snazel extract and further cultured for 48 hours. Subsequently, the medium containing 400 μg / mL of 3- (4,5-dimethyl-2-thiazolyl) -2,5-diphenyltetrazolium bromide (MTT) was exchanged and cultured for 2 hours. Formazan generated by the opening of the tetrazolium ring was removed. Extraction was performed with 2-propanol, and absorbance at 550 nm was measured with a microplate reader. At the same time, the absorbance at 650 nm was measured as turbidity, and the cell activation effect was evaluated by the difference between the two measured values. In addition, in order to confirm the validity of the measurement method, instead of the medium supplemented with the snael extract, measurement was performed using Dulbecco's modified Eagle medium (DMEM) with 5% fetal calf serum as a positive control. It was. The obtained evaluation results are shown in Table 1 as relative values with the cell activation effect when the snaal extract is not added as 100.
[0023]
[Table 1]
Figure 0003627862
[0024]
From Table 1, a significant fibroblast activation effect was observed when the snaal extract was added at 0.25 to 1.00 mg / mL, compared to the case without addition, with a risk rate of less than 1%. From this, it was revealed that the snack extract has an excellent fibroblast activation effect.
[0025]
Next, it demonstrates about the activation effect | action of the epidermis cell of a Snassula ( Cassytha L.) plant extract.
[0026]
The evaluation was performed according to the following procedure. Normal human epidermal cells were seeded in a 96-well microplate at 2.0 × 10 4 cells per well. As a seeding medium, commercially available Humdia-KG2 manufactured by Kurabo Industries Co., Ltd. was used. After culturing for 24 hours, it was replaced with a test medium to which the snaal extract prepared by Preparation Method 1 was added from the whole snacle plant and further cultured for 24 hours. Then, the medium containing 100 μg / mL of 3- (4,5-dimethyl-2-thiazolyl) -2,5-diphenyltetrazolium bromide (MTT) was replaced and cultured for 2 hours. Formazan produced by the opening of the tetrazolium ring was removed. Extraction was performed with 2-propanol, and absorbance at 550 nm was measured with a microplate reader. At the same time, the absorbance at 650 nm was measured as turbidity, and the cell activation effect was evaluated by the difference between the two measured values. The evaluation results are shown in Table 2 as relative values when the cell activation effect when no snarl extract is added is defined as 100.
[0027]
[Table 2]
Figure 0003627862
[0028]
From Table 2, when the snaal extract was added at 1.00 to 5.00 mg / mL, a significant epidermal cell activation effect was observed at a risk rate of less than 1% compared to the case of no addition. From this, it was revealed that the snack extract has an excellent activating effect on epidermal cells.
[0029]
Next, the antioxidant action of a plant extract of Cassytha L. will be described.
[0030]
The evaluation was performed according to the following procedure. 100 μL of a snarl extract solution diluted to 1.0 mg / mL with a 50 wt% aqueous ethanol solution was added to a 96-well microplate. Next, 100 μL of a 1,1-diphenyl-2-picrylhydrazyl (DPPH) solution prepared with ethanol to a concentration of 0.2 mM was added to a 96-well microplate. The mixture was left in the dark with stirring, and the absorbance at 516 nm was measured after 24 hours. Assuming that the absorbance in the case of no addition of the snail extract is (A) and the absorbance of the snail extract solution is (B), the value of the formula (1) is defined as the radical elimination rate.
Formula (1) {1- (B) / (A)} × 100 (%)
Table 3 shows the experimental results of the extract obtained by the preparation method 1 from the whole plant of snazel.
[0031]
[Table 3]
Figure 0003627862
[0032]
As apparent from Table 3, it was found that the snack extract had an excellent antioxidant effect.
[0033]
Then, the prescription of the Example which mix | blended the genus Cassytha L. which concerns on this invention is shown.
[0034]
[Examples 1 to 4] Emulsion
Figure 0003627862
Production method: The oil phase components (1) to (6) are heated and dissolved at 80 ° C. On the other hand, the aqueous phase components (7) to (10) are dissolved by heating at 80 ° C. The oil phase component is added to this while stirring and uniformly emulsified with a homogenizer. After the emulsification, cooling is started, and (11) and (12) are sequentially added and mixed uniformly.
[0035]
[Table 4]
Figure 0003627862
[0036]
[Example 5] Lotion (1) Ethanol 15.0 (% by weight)
(2) Polyoxyethylene (40E.O.) hydrogenated castor oil 0.3
(3) Fragrance 0.1
(4) Purified water 81.36
(5) Citric acid 0.02
(6) Sodium citrate 0.1
(7) Glycerin 3.0
(8) Hydroxyethyl cellulose 0.1
(9) Snail extract (flower) [Preparation method 3] 0.02
Production method: (2) and (3) are dissolved in (1). After dissolution, (4) to (8) are sequentially added, and then sufficiently stirred, (9) is added and mixed uniformly.
[0037]
[Example 6] Cream (1) Squalane 10.0 (% by weight)
(2) Stearic acid 2.0
(3) Hydrogenated palm kernel oil 0.5
(4) Hydrogenated soybean phospholipid 0.1
(5) Cetanol 3.6
(6) Lipophilic glyceryl monostearate 2.0
(7) Glycerin 10.0
(8) Methyl paraoxybenzoate 0.1
(9) Arginine (20% by weight aqueous solution) 15.0
(10) Purified water 40.7
(11) Carboxyvinyl polymer (1% by weight aqueous solution) 15.0
(12) Snail extract (whole plant) [Preparation method 1] 1.0
Production method: The oil phase components (1) to (6) are heated and dissolved at 80 ° C. On the other hand, the aqueous phase components (7) to (11) are dissolved by heating at 80 ° C. The oil phase component is added to this while stirring and uniformly emulsified with a homogenizer. After emulsification, cooling is started, and (12) is added at 40 ° C. and mixed uniformly.
[0038]
[Example 7] Cosmetic liquid
Figure 0003627862
Production method: The aqueous phase components (1) to (6) are mixed and dissolved by heating at 75 ° C. On the other hand, the oil phase components (7) to (14) are mixed and dissolved by heating at 75 ° C. Next, the oil phase component is added to the aqueous phase component and preliminary emulsification is performed, followed by uniform emulsification with a homomixer. Cooling is started after completion of emulsification, and (15) is added at 50 ° C. Cool further to 40 ° C., add (16) and mix evenly.
[0039]
[Example 8] Aqueous gel (1) Carboxyvinyl polymer 0.5 (% by weight)
(2) Purified water 86.3
(3) Sodium hydroxide (10% by weight aqueous solution) 0.5
(4) Ethanol 10.0
(5) Methyl paraoxybenzoate 0.1
(6) Fragrance 0.1
(7) Snail extract (fruit) [Preparation Method 4] 0.1
(8) Polyoxyethylene (60E.O.) hydrogenated castor oil 0.1
(9) Glycerin 2.0
(10) Cassis siriorata extract (whole plant) [Preparation method 3] 0.1
(11) Kessnar extract (flower) [Preparation method 1] 0.1
(12) Itonas extract (stem) [Preparation Method 1] 0.1
Manufacturing method: (1) is added to (2), and after stirring uniformly, (3) is added. After stirring uniformly, add (5) previously dissolved in (4). After stirring uniformly, the previously mixed (6) to (8) are added. After stirring uniformly, (9) to (12) are sequentially added and mixed uniformly.
[0040]
[Example 9] Cleansing Fee (1) Squalane 81.95
(2) Polyoxyethylene glyceryl isostearate 15.0
(3) Purified water 3.0
(4) Snail extract (flower) [Preparation Method 4] 0.02
(5) Itosnazal extract (stem) [Preparation method 4] 0.03
Manufacturing method: (1) and (2) are uniformly dissolved. To this, (3) to (5) are sequentially added and mixed uniformly.
[0041]
[Example 10] Face washing foam (1) Stearic acid 16.0 (wt%)
(2) Myristic acid 16.0
(3) Lipophilic glyceryl monostearate 2.0
(4) Glycerin 20.0
(5) Sodium hydroxide 7.5
(6) Palm oil fatty acid amidopropyl betaine 1.0
(7) Purified water 36.5
(8) Kessnazal extract (stem) [Preparation Method 3] 0.5
(9) Cassis siriorata extract (stem) [Preparation method 2] 0.5
Production method: The oil phase components (1) to (4) are heated and dissolved at 80 ° C. On the other hand, the aqueous phase components (5) to (7) are heated and dissolved at 80 ° C., and mixed and stirred uniformly with the oil phase components. Cooling is started, and (8) and (9) are added at 40 ° C. and mixed uniformly.
[0042]
[Example 11] Make-up base cream (1) Squalane 10.0 (% by weight)
(2) Cetanol 2.0
(3) Glycerin tri-2-ethylhexanoate 2.5
(4) Lipophilic glyceryl monostearate 1.0
(5) Propylene glycol 11.0
(6) Sucrose fatty acid ester 1.3
(7) Purified water 70.4
(8) Titanium oxide 1.0
(9) Bengala 0.1
(10) Yellow iron oxide 0.4
(11) Fragrance 0.1
(12) Snail extract (stem) [Preparation method 2] 0.1
(13) Kessnazal extract (stem) [Preparation Method 1] 0.1
Production method: The oil phase components (1) to (4) are mixed and heated and dissolved at 75 ° C. On the other hand, the aqueous phase components (5) to (7) are mixed and dissolved by heating at 75 ° C., and the pigments (8) to (10) are added thereto and dispersed uniformly with a homomixer. The oil phase component is added to the water phase component and emulsified with a homomixer. Cooling is started after emulsification, and the components (11) to (13) are added at 40 ° C. and mixed uniformly.
[0043]
Figure 0003627862
Production method: The oil phase components (1) to (6) are mixed and dissolved by heating at 75 ° C. On the other hand, the water phase components (7) to (10) are mixed, dissolved by heating at 75 ° C., the pigments (11) to (15) are added thereto, and the mixture is uniformly dispersed with a homomixer. Add oil phase ingredients and emulsify. Cooling is started after the emulsification is completed, and the components (16) to (18) are sequentially added at 40 ° C. and mixed uniformly.
[0044]
[Example 13] Water-in-oil emollient cream (1) Liquid paraffin 30.0 (wt%)
(2) Microcrystalline wax 2.0
(3) Vaseline 5.0
(4) Diglycerin oleate 5.0
(5) Sodium chloride 1.3
(6) Potassium chloride 0.1
(7) Propylene glycol 3.0
(8) 1,3-butylene glycol 5.0
(9) Methyl paraoxybenzoate 0.1
(10) Snail extract (stem) [Preparation method 1] 0.5
(11) Purified water 45.9
(12) Fragrance 0.1
(13) Kessnar extract (flower) [Preparation Method 4] 2.0
Production method: Dissolve (5) and (6) in a part of (11) to 50 ° C., and gradually add to (4) heated to 50 ° C. with stirring. After mixing this, it disperse | distributes uniformly to (1)-(3) heated and melt | dissolved at 70 degreeC. (7) to (10) are added to the remainder of (11) heated and dissolved at 70 ° C. while stirring and emulsified with a homomixer. Cooling is started after the emulsification is completed, and (12) and (13) are added at 40 ° C. and mixed uniformly.
[0045]
[Example 15] Pack (1) 68.9 (% by weight) purified water
(2) Polyvinyl alcohol 12.0
(3) Ethanol 10.0
(4) Glycerin 5.0
(5) Polyethylene glycol (average molecular weight 1000) 2.0
(6) Cassis siriorata extract (stem) [Preparation method 1] 1.0
(7) Snail extract (flower) [Preparation method 2] 1.0
(8) Fragrance 0.1
Production method: (2) and (3) are mixed, heated to 80 ° C, and then dissolved in (1) heated to 80 ° C. After uniformly dissolving, (4) to (5) are added, and cooling is started while stirring. Cool to 40 ° C., add (6) to (8) and mix uniformly.
[0046]
[Example 17] Bath agent (1) Fragrance 0.3 (% by weight)
(2) Snail extract (stem) [Preparation method 1] 0.5
(3) Itonas extract (stem) [Preparation method 3] 0.5
(4) Sodium bicarbonate 50.0
(5) Sodium sulfate 48.7
Production method: (1) to (5) are mixed uniformly.
[0047]
The use test was performed about Examples 1-8 of this invention, and the improvement effect of wrinkles, tarmi, skin firmness, and rough skin was evaluated. At that time, in Example 1, the blended snack extract was replaced with purified water, and a use test was conducted simultaneously as Comparative Example 1.
[0048]
For each sample, 20 male and female panelists in their 50's to 60's who have significant symptoms such as wrinkles, tarmi, reduced skin firmness, and rough skin were blindly used for 1 month, and the skin condition before and after use was confirmed. Changes were observed and evaluated. As indicators of skin symptoms, wrinkles, tarmi, skin firmness, and rough skin were evaluated in three stages: “Improved”, “Slightly improved”, and “No change”. It was.
[0049]
[Table 5]
Figure 0003627862
[0050]
From Table 5, in wrinkles, tarmi, skin firmness, and rough skin, in a comparative example use group not containing a plant extract of the genus Cassytha, no improvement was observed in more than half of the panelists. In the example use group in which the genus ( Cassytha L.) plant extract was blended, a clear improvement was recognized in 60% or more of the panelists.
[0051]
As mentioned above, in the Example of this invention, it had the effect excellent in improvement of skin symptoms, such as a wrinkle, a sagging, skin firmness, and rough skin, compared with the conventional comparative example.
[0052]
【The invention's effect】
As described above in detail, according to the present invention, a cell activator and an antioxidant having excellent effects could be obtained. Moreover, the skin external preparation which has the effect excellent in prevention or improvement of skin aging and rough skin was able to be obtained by mix | blending such a cell activator and an antioxidant as an active ingredient.

Claims (1)

スナヅル属(Cassytha L.)植物抽出物を有効成分とする抗酸化剤。Antioxidant which contains a plant extract of Cassytha L. as an active ingredient.
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