JP4245862B2 - Topical skin preparation - Google Patents

Topical skin preparation Download PDF

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JP4245862B2
JP4245862B2 JP2002149492A JP2002149492A JP4245862B2 JP 4245862 B2 JP4245862 B2 JP 4245862B2 JP 2002149492 A JP2002149492 A JP 2002149492A JP 2002149492 A JP2002149492 A JP 2002149492A JP 4245862 B2 JP4245862 B2 JP 4245862B2
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extract
preparation
bruguiera
skin
added
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JP2003342148A (en
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彰 葉谷
速 前田
泰三 関
由美子 奥村
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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、オヒルギ属(Bruguiera)植物抽出物を有効成分とする細胞賦活剤及び抗酸化剤、並びにオヒルギ属(Bruguiera)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、オヒルギ属(Bruguiera)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】
【発明の実施の形態】
オヒルギ属(Bruguiera)植物は、マングローブ林の主要構成種であり、奄美大島を北限として、サモア諸島からオーストラリア北部,マレーシア,スリランカ,アフリカ東岸に囲まれた地域に広く分布しており、ヒルギ科(Rhizophoraceae)植物の共通した特長である胎生種子をつくる。オヒルギ属(Bruguiera)植物としては、オヒルギ(Bruguiera gymnorrhiza (L.) Lam.),シロバナヒルギ(Bruguiera cylindrica (L.) Blume),ニセオヒルギ(Bruguiera exaristata Ding Hou),ハイネッシイオヒルギ(Bruguiera hainesii C.G.Rogers),ヒメヒルギ(Bruguiera parviflora (Roxb.) Wight et Arnold ex Griffith),ロッカクヒルギ(Bruguiera sexangula (Lour.) Poir.)等が知られている。
【0007】
これらオヒルギ属(Bruguiera)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、オヒルギ属(Bruguiera)植物の幹,枝,果実,葉,花,種子,樹皮,樹液,根,芽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、葉や種子を用いるとよい。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。
【0008】
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。
【0009】
オヒルギ属(Bruguiera)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。オヒルギ属(Bruguiera)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。
【0010】
本発明における細胞賦活剤及び抗酸化剤は、上述のオヒルギ属(Bruguiera)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オヒルギ属(Bruguiera)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。
【0011】
本発明におけるオヒルギ属(Bruguiera)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。
【0012】
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。
【0013】
なお、本発明に係る皮膚外用剤には、オヒルギ属(Bruguiera)植物抽出物の他に、通常医薬品,医薬部外品,皮膚化粧料,毛髪用化粧料及び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。
【0014】
【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。まず、本発明のオヒルギ属(Bruguiera)植物抽出物の調製方法について示す。
【0015】
[調製方法1]
オヒルギ属(Bruguiera)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、オヒルギ属(Bruguiera)植物抽出物を得た。
【0016】
[調製方法2]
オヒルギ属(Bruguiera)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、オヒルギ属(Bruguiera)植物抽出物を得た。
【0017】
[調製方法3]
オヒルギ属(Bruguiera)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、オヒルギ属(Bruguiera)植物抽出物を得た。
【0018】
[調製方法4]
超臨界抽出装置にオヒルギ属(Bruguiera)植物を投入し、40℃において15MPaの大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、オヒルギ属(Bruguiera)植物抽出物を得た。
【0019】
次に、オヒルギ属(Bruguiera)植物抽出物の真皮線維芽細胞の賦活作用を示す。
【0020】
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、オヒルギ属(Bruguiera)植物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。オヒルギの葉,実,及び根から調製方法1によって得られた抽出物の評価結果を、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。
【0021】
【表1】

Figure 0004245862
【0022】
表1より、オヒルギの葉から調製方法1により得られた抽出物では、オヒルギ抽出物を0.063〜0.50mg/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。また、オヒルギの実から調製方法1により得られた抽出物では、オヒルギ抽出物を1.0mg/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。さらに、また、オヒルギの根から調製方法1により得られた抽出物では、オヒルギ抽出物を0.031〜0.125mg/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。以上のことから、オヒルギ属(Bruguiera)植物抽出物は、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。
【0023】
次に、オヒルギ属(Bruguiera)植物抽出物の表皮細胞の賦活作用について示す。
【0024】
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、オヒルギの実から調製方法1により調製したオヒルギ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、細胞賦活剤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。
【0025】
【表2】
Figure 0004245862
【0026】
表2より、オヒルギの実から調製方法1により得られた抽出物では、オヒルギ抽出物を0.008〜0.20mg/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、オヒルギ属(Bruguiera)植物抽出物は、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。
【0027】
次に、オヒルギ属(Bruguiera)植物抽出物の抗酸化作用について示す。
【0028】
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任意の濃度に希釈したオヒルギ抽出物溶液を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。オヒルギ抽出物無添加の場合の吸光度を(A)、オヒルギ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(%)
オヒルギの葉及び根より調製方法1によって得られた抽出物の実験結果を表3に示す。
【0029】
【表3】
Figure 0004245862
【0030】
表3より明らかなように、オヒルギ属(Bruguiera)植物抽出物には優れた抗酸化作用があることが分かった。
【0031】
続いて、本発明に係るオヒルギ属(Bruguiera)植物抽出物を配合した実施例の処方を示す。
【0032】
Figure 0004245862
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。
【0033】
【表4】
Figure 0004245862
【0034】
[実施例7]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)オヒルギ抽出物(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。
【0035】
[実施例8]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)オヒルギ抽出物(根)[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)〜(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、(11)を加え、冷却を開始し、40℃にて(12)を加え、均一に混合する。
【0036】
Figure 0004245862
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。
【0037】
[実施例10]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 86.1
(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)オヒルギ抽出物(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)ヒメヒルギ抽出物(葉)[調製方法3] 0.1
(11)シロバナヒルギ抽出物(根)[調製方法1] 0.1
(12)ハイネッシイオヒルギ抽出物(葉)[調製方法3] 0.1
(13)ニセオヒルギ抽出物(葉)[調製方法1] 0.1
(14)ロッカクヒルギ抽出物(葉)[調製方法2] 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)〜(14)を順次加え、均一に混合する。
【0038】
[実施例11]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)オヒルギ抽出物(根)[調製方法4] 0.02
(5)ニセオヒルギ抽出物(葉)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。
【0039】
[実施例12]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)シロバナヒルギ抽出物(葉)[調製方法3] 0.5
(9)ヒメヒルギ抽出物(根)[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。
【0040】
[実施例13]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)オヒルギ抽出物(葉)[調製方法2] 0.1
(13)ロッカクヒルギ抽出物(葉)[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。
【0041】
Figure 0004245862
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。
【0042】
[実施例15]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)オヒルギ抽出物(葉)[調製方法1] 0.5
(11)精製水 45.9
(12)香料 0.1
(13)シロバナヒルギ抽出物(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。
【0043】
[実施例16]ヘアートニック
(1)エタノール 50.0(重量%)
(2)精製水 49.898
(3)シロバナヒルギ抽出物(葉)[調製方法3] 0.001
(4)ハイネッシイオヒルギ抽出物(実)[調製方法4] 0.001
(5)香料 0.1
製法:(1)〜(5)の成分を混合,均一化する。
【0044】
[実施例17]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)ヒメヒルギ抽出物(葉)[調製方法1] 1.0
(7)ハイネッシイオヒルギ抽出物(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。
【0045】
Figure 0004245862
製法:(1)〜(6)の油相成分を混合し、75℃にて加熱溶解後する。一方、(7)〜(10)の水相成分を75℃にて加熱溶解し、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。
【0046】
[実施例19]入浴剤
(1)香料 0.3(重量%)
(2)オヒルギ抽出物(葉)[調製方法1] 0.5
(3)ニセオヒルギ抽出物(葉)[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1〜10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、配合したオヒルギ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 0004245862
【0050】
表5より、シワ,タルミ,肌のハリ,及び肌荒れについて、オヒルギ属(Bruguiera)植物抽出物を含有しない比較例使用群においては、ほとんど改善が認められなかったが、オヒルギ属(Bruguiera)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. More specifically, B. gymnorrhiza genus (Bruguiera) cell activator and an antioxidant as an active ingredient a plant extract, and to B. gymnorrhiza genus (Bruguiera) skin external agent for aging and skin roughness improvement formulated with plant extracts.
[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 activation and antioxidant activity in the genus Bruguira plant extract, and have completed the present invention.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The genus Bruguiera is a major constituent species of mangrove forests, and is widely distributed from the Samoa Islands to northern Australia, Malaysia, Sri Lanka, and the east coast of Africa, with Amami Oshima as the northern limit. Rhizophoraceae ) Produces embryo seeds, a common feature of plants. The B. gymnorrhiza belonging to the genus (Bruguiera) plant, B. gymnorrhiza (Bruguiera gymnorrhiza (L.) Lam. ), Shirobanahirugi (Bruguiera cylindrica (L.) Blume) , Niseohirugi (Bruguiera exaristata Ding Hou), high net Castanopsis B. gymnorrhiza (Bruguiera hainesii C. G. Rogers), Bruguiera parviflora (Roxb.) Wight et Arnold ex Griffith, Bruguiera sexangula (Lour.) Poir.
[0007]
When using these Bruguiera plants, it is common to use extracts. For extraction, any part of the stem, branch, fruit, leaf, flower, seed, bark, sap, root, bud, etc. of the genus Bruguiera can be used. Use leaves and seeds. 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, homogenization may be performed 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.
[0008]
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.
[0009]
The extract of the genus Bruguiera using the above solvent can be used as it is, but the concentrated and dried product can be dissolved again in water or a polar solvent, or the physiological action thereof is not impaired. You may use, after performing purification processes, such as decoloring, deodorizing, and desalting, or performing the fractionation process by column chromatography etc. The extract of the genus Bruguiera and its treated product and fractions can be freeze-dried after each treatment and fractionation and dissolved in a solvent at the time of use. It can also be used by encapsulating in vesicles such as liposomes or microcapsules.
[0010]
The cell activator and antioxidant in the present invention contain the above-mentioned Bruguiera plant extract as an active ingredient. Moreover, the effect which is excellent in prevention and improvement of aging and rough skin is exhibited by mix | blending the plant extract of the genus Brugiera which is such a cell activator and antioxidant with a skin external preparation.
[0011]
The compounding amount of the genus Bruguiera plant extract in the present invention can be adjusted depending on the type and purpose of the external preparation for skin, but is 0.0001 to 10.0% by weight based on the total amount of the external preparation for skin. Is more preferable, and 0.001 to 5.0% by weight is more preferable.
[0012]
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.
[0013]
The external preparation for skin according to the present invention contains oily ingredients that are usually blended in pharmaceuticals, quasi-drugs, skin cosmetics, hair cosmetics and cleansing agents in addition to the plant extract of Brugiera. , Moisturizers, powders, pigments, emulsifiers, solubilizers, detergents, UV absorbers, thickeners, drugs, fragrances, resins, antibacterial / 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.
[0014]
【Example】
Further, the features of the present invention will be described in detail by way of examples. First, the method for preparing the extract of the genus Bruguiera of the present invention will be described.
[0015]
[Preparation Method 1]
10 kg of a 50 wt% aqueous ethanol solution was added to 1 kg of a dry pulverized product of the genus Bruguiera and soaked at room temperature for 7 days. The extract was collected by filtration, and after removing the solvent, a Bruguiera plant extract was obtained.
[0016]
[Preparation Method 2]
Nine liters of water was added to 1 kg of a dry pulverized product of the genus Bruguiera and the mixture was extracted by refluxing at 90 ° C. for 6 hours. The extract was collected by filtration, and after removing the solvent, a Bruguiera plant extract was obtained.
[0017]
[Preparation Method 3]
Nine liters of methanol was added to 1 kg of a dry pulverized product of the genus Bruguiera and soaked at room temperature for 7 days. The extract was collected by filtration, and after removing the solvent, a Bruguiera plant extract was obtained.
[0018]
[Preparation Method 4]
A supercritical extractor was charged with a Bruguiera plant and extracted using a supercritical fluid of carbon dioxide at 40 ° C. under an atmospheric pressure of 15 MPa. The extract was collected to obtain a Bruguiera plant extract.
[0019]
Next, the activation effect | action of the dermal fibroblast of the Euglena genus ( Bruguiera ) plant extract is shown.
[0020]
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 Bruguiera plant extract and further cultured for 48 hours. Next, 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 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. Table 1 shows the evaluation results of the extract obtained by the preparation method 1 from leaves, berries, and roots, as relative values with the cell activation effect when the extract is not added as 100.
[0021]
[Table 1]
Figure 0004245862
[0022]
From Table 1, in the extract obtained by the preparation method 1 from the leaves of leeks, the risk rate is 1% when 0.063 to 0.50 mg / mL of the leeks extract is added compared to the case of no addition. A significant activation effect of fibroblasts was observed at less than 1. In addition, in the extract obtained from the method of preparing Japanese oak seeds by the preparation method 1, the significant fibroblasts with a risk rate of less than 1% when 1.0 mg / mL of the Japanese oak extract was added compared to the case of no addition. A cell activation effect was observed. Furthermore, in the extract obtained by the preparation method 1 from duckweed root, a risk rate of 1% is obtained when 0.031 to 0.125 mg / mL of duckweed extract is added compared to the case of no addition. A significant activation effect of fibroblasts was observed at less than 1. From the above, it was revealed that the plant extract of Brugiera has an excellent fibroblast activation action.
[0023]
Next, it shows about the activation effect | action of the epidermis cell of the genus Brugiera plant extract.
[0024]
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, the culture medium was replaced with a test medium supplemented with leeks extract prepared by Preparation Method 1 from leeks, and further cultured for 24 hours. Next, the medium containing 100 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. The evaluation results are shown in Table 2 as relative values when the cell activation effect when no cell activator is added is defined as 100.
[0025]
[Table 2]
Figure 0004245862
[0026]
From Table 2, in the extract obtained by the preparation method 1 from duckfruit, the risk rate is less than 1% when 0.008 to 0.20 mg / mL is added. A significant fibroblast activation effect was observed. From this, it was revealed that the plant extract of Bruguiera has an excellent activating effect on epidermal cells.
[0027]
Next, the antioxidant action of the extract of the genus Bruguiera will be described.
[0028]
The evaluation was performed according to the following procedure. 100 μL of a duckweed extract solution diluted to an arbitrary concentration with a 50 wt% ethanol aqueous 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 where no oak extract is added is (A) and the absorbance of the oak extract is (B), the value of 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 leaves and roots of leeks.
[0029]
[Table 3]
Figure 0004245862
[0030]
As is apparent from Table 3, it was found that the extract of Brugiera plant has an excellent antioxidant effect.
[0031]
Then, the prescription of the Example which mix | blended the Euglena ( Bruguiera ) plant extract based on this invention is shown.
[0032]
Figure 0004245862
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 emulsification, start cooling and add (11) and (12) sequentially and mix uniformly.
[0033]
[Table 4]
Figure 0004245862
[0034]
[Example 7] Lotion (1) Ethanol 15.0 (wt%)
(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) Oyster 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.
[0035]
[Example 8] 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) Oyster extract (root) [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 (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 is completed, add (11), start cooling, add (12) at 40 ° C., and mix uniformly.
[0036]
Figure 0004245862
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 emulsification, and (15) is added at 50 ° C. Cool further to 40 ° C, add (16) and mix evenly.
[0037]
[Example 10] Aqueous gel (1) Carboxyvinyl polymer 0.5 (% by weight)
(2) Purified water 86.1
(3) Sodium hydroxide (10% by weight aqueous solution) 0.5
(4) Ethanol 10.0
(5) Methyl paraoxybenzoate 0.1
(6) Fragrance 0.1
(7) Oyster extract (fruit) [Preparation Method 4] 0.1
(8) Polyoxyethylene (60E.O.) hydrogenated castor oil 0.1
(9) Glycerin 2.0
(10) Hirugirigi extract (leaves) [Preparation method 3] 0.1
(11) Shirobana hirugi extract (root) [Preparation method 1] 0.1
(12) Hynesioi hirugi extract (leaf) [Preparation method 3] 0.1
(13) Yellow leeks extract (leaves) [Preparation method 1] 0.1
(14) Rock lacquer extract (leaves) [Preparation method 2] 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 (14) are sequentially added and mixed uniformly.
[0038]
[Example 11] Cleansing fee (1) Squalane 81.95
(2) Polyoxyethylene glyceryl isostearate 15.0
(3) Purified water 3.0
(4) Oyster extract (root) [Preparation Method 4] 0.02
(5) Method for preparing Niseo hirugi extract (leaf) 4] 0.03
Manufacturing method: (1) and (2) are uniformly dissolved. To this, (3) to (5) are sequentially added and mixed uniformly.
[0039]
[Example 12] 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) Shirobana hirugi extract (leaves) [Preparation Method 3] 0.5
(9) Hirugigai extract (root) [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.
[0040]
[Example 13] Make-up base cream (1) Squalane 10.0 (wt%)
(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) Oyster extract (leaves) [Preparation method 2] 0.1
(13) Rock lacquer extract (leaves) [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 the emulsification is completed, and the components (11) to (13) are added at 40 ° C. and mixed uniformly.
[0041]
Figure 0004245862
Production method: The oil phase components (1) to (6) are mixed and dissolved by heating at 75 ° C. On the other hand, the aqueous phase components (7) to (10) are mixed and dissolved by heating at 75 ° C., and the pigments (11) to (15) are added thereto and 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.
[0042]
[Example 15] 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) Oyster extract (leaf) [Preparation method 1] 0.5
(11) Purified water 45.9
(12) Fragrance 0.1
(13) Shirobana hirugi 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, and (12) and (13) are added at 40 ° C. and mixed uniformly.
[0043]
[Example 16] Hair artnic (1) Ethanol 50.0 (% by weight)
(2) Purified water 49.898
(3) Shirobana hirugi extract (leaves) [Preparation method 3] 0.001
(4) Hynesioiohirugi extract (fruit) [Preparation method 4] 0.001
(5) Fragrance 0.1
Production method: Components (1) to (5) are mixed and homogenized.
[0044]
[Example 17] 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) Hirugigai extract (leaves) [Preparation method 1] 1.0
(7) Hynesioiohirugi 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.
[0045]
Figure 0004245862
Production method: The oil phase components (1) to (6) are mixed and heated and dissolved at 75 ° C. On the other hand, the aqueous phase components (7) to (10) are dissolved by heating at 75 ° C., the oil phase component is added, and the mixture is emulsified with a homomixer. Cooling is started after the emulsification is completed, and the components (11) to (13) are added at 40 ° C. and mixed uniformly.
[0046]
[Example 19] Bath agent (1) Fragrance 0.3 (% by weight)
(2) Oyster extract (leaf) [Preparation Method 1] 0.5
(3) Niseo hirugi extract (leaves) [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 1-10 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 oak extract was replaced with purified water, and a use test was simultaneously conducted 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 0004245862
[0050]
From Table 5, wrinkles, sagging, skin elasticity, and the rough skin, in the comparative example using a group containing no B. gymnorrhiza genus (Bruguiera) plant extracts, although little improvement was observed, B. gymnorrhiza genus (Bruguiera) plant extracts In the example use group in which the product was blended, 60% or more of panelists clearly improved.
[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 the cell activator and antioxidant which were such as an active ingredient.

Claims (1)

オヒルギ属(Bruguiera)植物抽出物を有効成分とする細胞賦活剤。A cell activator comprising a plant extract of Brugiera as an active ingredient.
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