JP3950194B2 - Skin inflammation inhibitor - Google Patents

Skin inflammation inhibitor Download PDF

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Publication number
JP3950194B2
JP3950194B2 JP04796597A JP4796597A JP3950194B2 JP 3950194 B2 JP3950194 B2 JP 3950194B2 JP 04796597 A JP04796597 A JP 04796597A JP 4796597 A JP4796597 A JP 4796597A JP 3950194 B2 JP3950194 B2 JP 3950194B2
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JP
Japan
Prior art keywords
sericin
skin
atopic dermatitis
hydrolyzate
skin inflammation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP04796597A
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Japanese (ja)
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JPH10245345A (en
Inventor
直之 安田
英幸 山田
正和 野村
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Seiren Co Ltd
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Seiren Co Ltd
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  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
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Description

【0001】
【発明の属する技術分野】
本発明は繭、生糸から抽出されるタンパク質に関する。本発明に係るタンパク質はアトピー性皮膚炎による肌のかゆみ、チクチク感の軽減、減少に優れた効果があることから、皮膚外用剤など医薬品、化粧水、クリームなどの化粧品、皮膚に直接触れる衣料などの様々な分野で利用できるものである。
【0002】
【従来の技術】
アトピー性皮膚炎の発症原因は不明であるが、以前から知られている免疫異常以外に、食事や皮膚生理機能の異常など様々な原因が絡み合って発症すると考えられている。アトピー性皮膚炎は表皮性掻痒を特徴とし、掻破による表皮剥離が掻痒の強さに比例して増加する。表皮剥離は化膿菌などによる二次感染、あるいは表皮に付着した物質が容易に経皮吸収されるため、香粧品の成分によって急性の刺激反応を生ずることもある。また、表皮剥離は機械的刺激にも弱く、肌着などの衣料との摩擦により、湿疹などを生ずることもある。そのため、このような皮膚を正常化させるには長期間を要する。
一般にアトピー性皮膚炎の治療はステロイド系外用剤により実施されるが、長期使用により、皮膚の萎縮、血管拡張などの副作用が伴う。その他では、入浴時に保湿入浴剤を使用する、あるいは機械的刺激を少なくして皮膚を洗浄するなどの治療が実施されるが、入浴直後の経皮水分蒸散量は高く、皮膚は乾燥しやすい。アトピー性皮膚炎は皮膚の乾燥状態が掻痒感を増強することもあり、必ずしも満足できる治療法はなかった。そのため、安全性の高い治療薬、治療材料が求められていた。
【0003】
【発明が解決しようとする課題】
そこで我々はアトピー性皮膚炎の患者らに開発が望まれている安全性の高い治療薬、治療材料を提供することを目的とした。
本発明の目的は、人体に対し安全で、熱を加えても失活せず、水溶性で適用範囲が広く、優れた皮膚炎症予防・治療効果を示す新規皮膚炎症防止剤を提供することにある。
【0004】
本発明は繭又は生糸に含有されるセリシンを、酸、アルカリ、または酵素により部分加水分解して抽出した後精製して得られる、純度90%以上で平均分子量が約20Kであるセリシン加水分解物を有効成分とするアトピー性皮膚炎防止剤である。
【0005】
本発明で用いるセリシンの加水分解物は、純度90%以上の高精製度のタンパク質(ペプチド)の状態のものであり、繭又は生糸に含有されるセリシンを、酸、アルカリ、あるいは酵素によって部分加水分解して抽出してから、例えば次の(1),(2)のいずれかの方法で回収する。
(1) メタノール、エタノール、ジオキサン等の水溶性有機溶媒を混合してセリシンを析出させた後、これを濾別乾燥して、セリシンを粉体として得る。
(2) 特開平4−202435号公報に提案されているように、限外濾過膜、あるいは逆浸透膜に付した後、乾燥することによりセリシン粉体を得る。
【0006】
かくして得た加水分解物としてのセリシンは水溶性であり、熱に対しても安定である。アトピー性皮膚炎等の発症部位やその程度等に応じた適宜の使用形態にすることができる。
即ち水溶液の状態で患部に塗布したり、軟膏等の外用薬や化粧料におけるようにクリーム、乳液、ローション、ゲル等に混入して用いることもできる。またガーゼや粘着性シート等に付着させて用いることもできる。さらに肌着やブラジャー等の着用素材に由来するアトピー性皮膚炎に対してはこれらを構成する素材にセリシンを付着させて用いることもできる。繊維素材に付着させる場合には、繊維編織物にセリシン水溶液を含浸させ乾燥熱固定する方法等によりセリシンを付着させることができる。これらにおけるセリシンの量はその効果を発現しうる量であれば特に制限はなく、全体に対したとえば0.1〜50重量%、より好ましくは0.5〜5重量%程度が用いられる。
次に実施例により本発明を具体的に説明する。
【0007】
【実施例】
セリシンの製造:
絹織物1Kgを、0.2重量%炭酸ナトリウム(試薬特級)水50L中で2時間処理してセリシン加水分解物を抽出した。得られた抽出液を平均孔径0.2μmのフィルターで濾過して、凝集物を除去した。濾液(凝集物を除去した抽出液)を透析膜(ナカライテスク社製 分画分子量3500)により脱塩し、セリシン加水分解物水溶液を得た。この水溶液をエバポレーターにより濃縮を行ない、セリシン加水分解物の10%溶液を得た。得られたセリシン加水分解物は、平均分子量約20Kであった。得られたセリシン加水分解物溶液は除菌処理を行ない無菌環境下で褐色ビンに封入し、冷暗所で保管し本試験に用いた。
【0008】
症例1:
接触性皮膚炎と診断された24歳の女性についてセリシンの効果を試験した。
(現病歴)
約3年前より乳房下部、両肩、背部に掻痒性皮疹が発生し、アトピー性皮膚炎と考えていた。初診時、乳房下部、両肩、背部のブラジャーに接触する部分に一致して色素沈着を伴う落屑性紅斑を認めた。
(試験内容)
上記患者に対して患者の同意のもとに、セリシン加水分解物0.5%水溶液を患部に入浴後塗布した。セリシン加水分解物水溶液の塗布による皮膚変化の結果を表−1に示す。
【0009】
【表1】

Figure 0003950194
【0010】
上記のようにセリシン加水分解物の塗布を始めてから約3週間後に症状は改善が認められ、2ケ月後にはほとんど治癒した。この期間中ステロイド剤等の外用は一切行わなかった。
【0011】
症例2:
アトピー性皮膚炎と診断された28歳の女性についてセリシンの効果を試験した。
(現病歴)
約5年前より、両耳に皮疹が発生し、ステロイド外用剤により消失、中止により発症を繰り返した。2年前からは、顔面と膝の裏側に皮疹が出現した。
(試験内容)
上記患者に対して患者の同意のもとに、セリシン加水分解物0.5%水溶液を患部に入浴後塗布した。セリシン加水分解物水溶液の塗布による皮膚変化の結果を表−2に示す。
【0012】
【表2】
Figure 0003950194
【0013】
上記のようにセリシン加水分解物の塗布を始めてから約1ケ月後に症状は改善が認められ、2ケ月後にはほとんど治癒した。この期間中ステロイド剤等の外用は一切行わなかった。
【0014】
上記2症例とも長期間アトピー性皮膚炎、接触性皮膚炎の症状を示し、一般の治療では改善効果を示さなかった患者に対して高い有効性が確認された。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to proteins extracted from silkworms and raw silk. Since the protein according to the present invention has an excellent effect on the reduction and reduction of itching, tingling sensation caused by atopic dermatitis, pharmaceuticals such as external preparations for skin, cosmetics such as skin lotions, creams, clothing that directly touches the skin It can be used in various fields.
[0002]
[Prior art]
The cause of the onset of atopic dermatitis is unknown, but in addition to the previously known immune abnormalities, it is thought that various causes such as diet and abnormal skin physiology are involved. Atopic dermatitis is characterized by epidermal pruritus, and epidermal peeling due to scratching increases in proportion to the strength of pruritus. In epidermis peeling, secondary infection by Pseudomonas aeruginosa or the like, or substances adhering to the epidermis are easily transdermally absorbed, so that an acute irritation reaction may occur depending on the components of the cosmetic product. Moreover, epidermis peeling is also weak against mechanical irritation, and eczema may be caused by friction with clothing such as underwear. Therefore, it takes a long time to normalize such skin.
In general, atopic dermatitis is treated with a steroid-based external preparation, but side effects such as skin atrophy and vasodilation are associated with long-term use. In other cases, treatments such as using a moisturizing bath agent at the time of bathing or washing the skin with less mechanical irritation are performed, but the amount of transdermal moisture transpiration immediately after bathing is high, and the skin tends to dry. In the case of atopic dermatitis, the dryness of the skin may increase the itching sensation, and there is not always a satisfactory treatment. Therefore, highly safe therapeutic drugs and therapeutic materials have been demanded.
[0003]
[Problems to be solved by the invention]
Therefore, we aimed to provide highly safe therapeutic agents and therapeutic materials that are desired to be developed by patients with atopic dermatitis.
An object of the present invention is to provide a novel skin inflammation preventive agent that is safe for the human body, does not deactivate even when heat is applied, is water-soluble, has a wide range of applications, and exhibits excellent skin inflammation prevention / treatment effects. is there.
[0004]
The present invention relates to a sericin hydrolyzate having a purity of 90% or more and an average molecular weight of about 20K, which is obtained by partially hydrolyzing and extracting sericin contained in silkworms or raw silk with acid, alkali or enzyme . Is an anti-atopic dermatitis inhibitor.
[0005]
The sericin hydrolyzate used in the present invention is in a highly purified protein (peptide) state having a purity of 90% or more, and sericin contained in silkworms or raw silk is partially hydrolyzed by acid, alkali or enzyme. After decomposing and extracting, for example, it is recovered by one of the following methods (1) and (2).
(1) After mixing sericin by mixing water-soluble organic solvents, such as methanol, ethanol, and dioxane, this is separated by filtration and dried to obtain sericin as powder.
(2) As proposed in JP-A-4-202435, after being applied to an ultrafiltration membrane or a reverse osmosis membrane, sericin powder is obtained by drying.
[0006]
Sericin as a hydrolyzate thus obtained is water-soluble and stable to heat. Appropriate forms of use can be made according to the onset site and the extent of atopic dermatitis.
That is, it can be applied to the affected area in the form of an aqueous solution, or can be used by being mixed in creams, emulsions, lotions, gels, etc. as in external medicines such as ointments and cosmetics. It can also be used by adhering to a gauze or an adhesive sheet. Furthermore, for atopic dermatitis derived from wearing materials such as underwear and brassiere, sericin can be attached to the materials constituting these. In the case of attaching to a fiber material, sericin can be attached by a method of impregnating a fiber knitted fabric with an aqueous solution of sericin and drying and fixing. The amount of sericin in these is not particularly limited as long as the effect can be exhibited. For example, 0.1 to 50% by weight, more preferably about 0.5 to 5% by weight, is used with respect to the whole.
Next, the present invention will be described specifically by way of examples.
[0007]
【Example】
Production of sericin:
1 kg of silk fabric was treated in 50 L of 0.2 wt% sodium carbonate (special grade reagent) water for 2 hours to extract sericin hydrolyzate. The obtained extract was filtered through a filter having an average pore size of 0.2 μm to remove aggregates. The filtrate (extract from which aggregates were removed) was desalted with a dialysis membrane (manufactured by Nacalai Tesque, molecular weight cut off 3500) to obtain an aqueous solution of sericin hydrolyzate. This aqueous solution was concentrated by an evaporator to obtain a 10% solution of sericin hydrolyzate. The obtained sericin hydrolyzate had an average molecular weight of about 20K. The obtained sericin hydrolyzate solution was sterilized, sealed in a brown bottle under aseptic environment, stored in a cool dark place, and used for this test.
[0008]
Case 1:
The effect of sericin was tested on a 24-year-old woman diagnosed with contact dermatitis.
(Current medical history)
From about 3 years ago, pruritic eruptions occurred on the lower breast, both shoulders, and back, which was considered atopic dermatitis. At the first visit, desquamated erythema with pigmentation was observed, corresponding to the parts of the lower breast, shoulders, and back that were in contact with the bra.
(contents of the test)
With the consent of the patient, a 0.5% aqueous solution of sericin hydrolyzate was applied to the affected area after bathing. Table 1 shows the results of skin changes caused by application of the aqueous sericin hydrolyzate solution.
[0009]
[Table 1]
Figure 0003950194
[0010]
As described above, symptoms improved after about 3 weeks from the start of application of the sericin hydrolyzate, and almost cured after 2 months. During this period, no external use of steroids was conducted.
[0011]
Case 2:
The effect of sericin was tested on a 28-year-old woman diagnosed with atopic dermatitis.
(Current medical history)
About 5 years ago, skin eruptions occurred in both ears, and disappeared due to topical steroids, and repeated onset when discontinued. From two years ago, a rash appeared on the face and the back of the knee.
(contents of the test)
With the consent of the patient, a 0.5% aqueous solution of sericin hydrolyzate was applied to the affected area after bathing. Table 2 shows the results of skin changes caused by application of the aqueous sericin hydrolyzate solution.
[0012]
[Table 2]
Figure 0003950194
[0013]
As described above, symptoms improved after about 1 month from the start of application of the sericin hydrolyzate, and almost cured after 2 months. During this period, no external use of steroids was conducted.
[0014]
Both of the above two cases showed symptoms of atopic dermatitis and contact dermatitis for a long time, and high effectiveness was confirmed for patients who did not show an improvement effect by general treatment.

Claims (1)

繭又は生糸に含有されるセリシンを、酸、アルカリ、または酵素により部分加水分解して抽出した後精製して得られる、純度90%以上で平均分子量が約20Kであるセリシン加水分解物を有効成分とするアトピー性皮膚炎防止剤。 A sericin hydrolyzate having a purity of 90% or more and an average molecular weight of about 20K, obtained by partially hydrolyzing and extracting sericin contained in silkworms or raw silk with an acid, alkali, or enzyme, is an active ingredient Atopic dermatitis inhibitor.
JP04796597A 1997-03-03 1997-03-03 Skin inflammation inhibitor Expired - Lifetime JP3950194B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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JP3950194B2 true JP3950194B2 (en) 2007-07-25

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100338684B1 (en) * 1999-02-26 2002-05-30 정찬복 The extracting method of sericin and use thereof
JP2001151663A (en) * 1999-11-25 2001-06-05 Iho Tokuma Method for extracting silk essence, extracted solution of silk essence, beauty solution, soap and shampoo containing the extracted solution of silk essence
JP4677078B2 (en) * 2000-06-14 2011-04-27 株式会社相生発酵 Skin cancer preventive agent
JP3805700B2 (en) * 2002-02-28 2006-08-02 セーレン株式会社 Multifunctional UV protection agent
JP2008208123A (en) * 2007-02-02 2008-09-11 Iwate Univ Method for obtaining sericin in wild silkworm's silk and use of the same to toilet water and the like
WO2013042955A2 (en) * 2011-09-20 2013-03-28 Republic Of Korea(Management : Rural Development Administration) Cosmetic compositions including hydrolysate from silkworm gland
CN112194715B (en) * 2020-11-03 2021-11-02 西南大学 Anti-inflammatory sericin peptide and application thereof
CN112225791B (en) * 2020-11-03 2021-10-22 西南大学 Sericin peptide and application thereof
CN112300258B (en) * 2020-11-03 2021-10-22 西南大学 Anti-inflammatory sericin peptide and application thereof

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