JP6856618B2 - 接着性ペプチド - Google Patents
接着性ペプチド Download PDFInfo
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- JP6856618B2 JP6856618B2 JP2018501837A JP2018501837A JP6856618B2 JP 6856618 B2 JP6856618 B2 JP 6856618B2 JP 2018501837 A JP2018501837 A JP 2018501837A JP 2018501837 A JP2018501837 A JP 2018501837A JP 6856618 B2 JP6856618 B2 JP 6856618B2
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Description
[X1−X2−X3−X4−X5]n
前記X1は任意のアミノ酸で、
X2、X3及びX4は、L、V、I、E及びAのうちいずれか一つのアミノ酸であり、各々同じまたは異なり、X5は、KまたはRのアミノ酸である。
[X6−X7−X8−X9−X10−X11]n
X6は、F、Y及びWのうちいずれか一つのアミノ酸で、
X7は、KまたはRのアミノ酸で、
X8は、A、M及びIのうちいずれか一つのアミノ酸で、
X9は、L、M及びGのうちいずれか一つのアミノ酸で、
X10は、任意のアミノ酸で、
X11は、C、S及びTのうちいずれか一つのアミノ酸である。
前記化学式Iにおいて、前記X2、X3またはX4のうち一つ以上は欠如されてもよい。
X12 1−15
[X1−X2−X3−X4−X5]n
X1は、極性の非荷電された任意のアミノ酸であり、
X2、X3及びX4は、L、V、I、E及びAのうちいずれか一つのアミノ酸であり、各々同じまたは異なり、
X5は、KまたはRのアミノ酸である。
[X6−X7−X8−X9−X10−X11]n
X6は、F、Y及びWのうちいずれか一つのアミノ酸で、
X7は、KまたはRのアミノ酸で、
X8は、A、M及びIのうちいずれか一つのアミノ酸で、
X9は、L、M及びGのうちいずれか一つのアミノ酸で、
X10は、任意のアミノ酸で、
X11は、C、S及びTのうちいずれか一つのアミノ酸である。
前記nは1または2である。
<実施例1.接着性ペプチドの製造>
細胞接着には、ペプチドを予めコートする方法とコートせず細胞培養液に直接添加して培養する二種類の方法で観察し、一致する結果を示した。コート方法を取る場合、PBSまたは、ウシ胎児血清を含まない細胞培養培地に一定濃度のペプチドを添加して、常温、30分間コートした後、溶液を除去した後、細胞を添加して多様な時間にかけて接着を測定した。また、培養培地にペプチドを添加する場合、細胞を懸濁する時、一定水準のペプチドを共に添加してよく懸濁した後培養皿に移した。細胞接着測定は次の通りに行われた。細胞接着は、ペプチドを添加しなかった場合を陰性対照群に、PBSそしてpoly−L−lysinをコートした場合を陽性対照群にして光学顕微鏡を介して通常の観察、アクチンフィラメント構造及び粗い細胞膜境界形態観察のために、F−actin染色及び共焦点顕微鏡分析、そして接着に対する定量化のために細胞の消費量またはDNA量を測定した。消費量は、CCK−8(Dojindo)を利用して、吸光度を測定して、DNA量は、ピコグリーン定量キット(Picogreenassay kit(Life Technologies))を製造者の方法のとおり利用して蛍光値を測定した。接着された細胞だけを定量化するために、接着されなかった細胞は捨ててPBSでさらに2回洗浄して表面に付いている細胞だけを消費量またはDNAを定量に使用した。
まず、タンパク質合成を阻害すると知られているEDTA、シクロヘキサミド(CHX)(10μM、37℃1時間)またはGAGで細胞を処理した後上述したような接着能を実験した。
次は、非タンパク質物質の関与の有無を調べて、その対象に細胞表面の細胞外メトリックス(Extracellualrmatrix,ECM)に多量含まれているプロテオグリカンとの関連性を分析した。
プロテオグリカンを構成する主な成分であるヘパラン硫酸(heparan sulfate)、ヘパリン(heparin)、コンドロイチン硫酸(chondroitin sulfate)、デルマタン硫酸(dermatansulfate)、ケラタン硫酸(keratan sulafate)等のグリコアミノグリカン(glycoaminoglycan)(GAG)は、ECMを構成する主な成分でもあるが、ECM構造の保存性(structuralintegrity of ECM)を維持して細胞の形態を維持すると共に、細胞の接着、細胞の極性(cellpolarity)を調節する。ECMが有するこのような機能は、環境に対する細胞の適応を誘導すると共に複雑な一連の代謝過程と直接的に関連していて、様々な生理学的役割を調節する複合的機能を有する。プロテオグリカンに対する本願ペプチドの分子親和力は、(i)アフィニティークロマトグラフィー、(ii)精製されたGAG成分を利用した競争的結合を介した細胞接着調査、(iii)GAG成分を含むECMを特異的に分解する酵素を処理してペプチドによる細胞接着促進の抑制調査、以上の三つの方法を介して検証した。酵素処理の場合、ヒアルロニダーゼ(hyaluronidase(Sigma))、コラゲナーゼ(collagenase(Sigma))を処理した。精製されたGAGは、hyaluronan(Sigma)、コンドロイチン硫酸(chondroitinsulfate(Sigma))、ヘパリン(heparin(Sigma))、ヘパラン硫酸(heparan sulfate(Sigma))を各々使用した。
(3)RGDと比較
Claims (10)
- 配列番号16〜22、24〜27、29〜37、42〜64、67及び68からなる群から選択されるアミノ酸配列からなる単離されたポリペプチド。
- 配列番号16〜20、22、24〜27、30〜37、42〜64、67及び68の第1アミノ酸はリシン残基に置換され、配列番号21の第1アミノ酸はアルギニンに置換され、配列番号29の第1アミノ酸はアスパラギン酸に置換されている請求項1に記載のポリペプチド。
- 配列番号16〜22、24〜27、30〜37、42〜64、67及び68の第1アミノ酸はアスパラギン酸又はグルタミン酸残基に置換され、配列番号29の第1アミノ酸はリシン又はアルギニン残基に置換されている請求項1に記載のポリペプチド。
- 配列番号16〜20、22、24〜27、30〜37、42〜64、67又は68のアミノ酸配列はN末端に14個以下のアルギニン残基をさらに含み、配列番号21のアミノ酸配列はN末端に14個以下のリシン残基をさらに含み、配列番号29のアミノ酸配列は14個以下のグルタミン酸残基をさらに含む請求項1に記載のポリペプチド。
- 前記ポリペプチドのN又はC−末端は、非反応性基で置き換えられたものである、請求項1乃至4のいずれか一項に記載のポリペプチド。
- 請求項1乃至4のいずれか一項に記載のポリペプチドをコードする、核酸分子。
- 請求項6に記載の核酸分子を含み、請求項1乃至4のいずれか一項に記載のポリペプチドを発現する、ベクター。
- イン・ビトロにおける、物質の接着性の向上のための請求項1乃至4のいずれか一項に記載のポリペプチドの使用。
- 請求項1乃至4のいずれか一項に記載のポリペプチドを含む接着用組成物。
- イン・ビトロにおいて、第1の生物学的若しくは非生物学的物質、及び/又は第2の生物学的若しくは非生物学的物質に請求項1に記載のポリペプチドを処理することにより、前記第1の生物学的若しくは非生物学的物質を第2の生物学的若しくは非生物学的物質に付着させる方法。
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