JP6553046B2 - 筋芽細胞の筋管への分化を規格化するための装置および方法 - Google Patents
筋芽細胞の筋管への分化を規格化するための装置および方法 Download PDFInfo
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Description
前記パターンは、中央領域と、前記中央領域から前記パターンの縦軸に沿って両方向に延伸する2つの側部領域とを含んでなる細長い表面を有し、ここで、中央領域と各側部領域の間には輪郭の不連続性があり、前記パターンの長さは100〜1000μmであり、前記パターンの最大幅は50〜500μmであり、
前記中央領域の最大幅と前記側部領域の最大幅の間の比は2以上であり、
前記パターンの長さと最大幅の間の比は4以下である。
前記パターンの中央領域を画定する第1の楕円表面、および
前記パターンの側部領域を画定する第1の楕円の主軸に一致する主軸を有する第2および第3の楕円表面
の部分的重畳からなり、
第2および第3の楕円表面はそれらの横軸に沿って第1の楕円表面と交差する。
(i)前記装置を準備すること、
(ii)前記装置の少なくとも1つの細胞接着パターン上に筋芽細胞を付着させること、
(iii)筋管への細胞分化を促進し、かつ、細胞接着パターン上での筋管の伸長を拘束するために、前記筋芽細胞を所定のインキュベーション時間の間、分化培地中で培養すること
を含んでなる方法である。
・合成ヒドロゲル材料、例えば、ポリ(ヒドロキシエチルメタクリレート)(PolyHEMA)、ポリアクリルアミド(PAA);ポリエチレングリコール(PEG)、ポリアクリル酸、ポリ(ビニルアルコール)(PVA)、ポリビニルピロリドン、ポリイミド、ポリウレタンなど、および上述の材料とそれらの誘導体のハイブリッド;
・天然ヒドロゲル材料、例えば、アガロース、デキストラン、ゼラチン、マトリゲル、DNA、ポリイソシアノペプチドなど;
・シリコーン材料
が挙げられる。
・マイクロコンタクトプリンティング[Engler 2004]、
・深UV活性化[Tseng 2011]、
・マイクロパターン転写[Polio 2012]、
・光化学結合[Hahn 2006]。
図3は、種々の細胞接着パターンが形成された(領域1〜8)装置(前記装置はパターンの無い領域も含む(領域9))および各領域で形成された筋管の写真を示す。
筋管の規格化は、軟質基材上に形成された本発明によるパターン上で細胞を培養することにより、硬質基材上に形成された同じパターンに比べてさらに改善され得る。
本発明の1つの利点は、ハイコンテントスクリーニング(high content screening)細胞系アッセイとのその適合性であり、筋毒性試験および/または有効化合物スクリーニングなどの種々の適用を可能とする。
Claims (13)
- 基材(1)と該基材上で筋芽細胞を培養するための少なくとも1つの細胞接着パターン(2)とを含んでなる、筋芽細胞の、規格化された形態学的パラメーターを有する筋管への分化を制御するための装置であって、
前記パターン(2)は、中央領域(2C)と、前記中央領域から前記パターンの縦軸に沿って両方向に延伸する2つの側部領域(2L)とを含んでなる細長い表面を有し、ここで、中央領域(2C)と各側部領域(2L)の間には輪郭の不連続性があり、前記パターンの長さ(L)は100〜1000μmであり、前記パターンの最大幅(Wc)は50〜500μmであり、
前記中央領域(2C)の最大幅(WC)と前記側部領域(2L)の最大幅(WL)の間の比は2以上であり、
前記パターン(2)の長さ(L)と最大幅(WC)の間の比は4以下であり、
前記パターンが3つの楕円表面:
前記パターンの中央領域を画定する第1の楕円表面、および
前記パターンの側部領域を画定する第1の楕円の主軸に一致する主軸を有する第2および第3の楕円表面
の部分的重畳からなり、
第2および第3の楕円表面はそれらの横軸に沿って第1の楕円表面と交差する、
装置。 - 前記パターンがその縦軸(X)および該縦軸に対して垂直な横軸(Y)に対して対称である、請求項1に記載の装置。
- 前記パターンの長さ(L)と最大幅(WC)の間の比が2.5である、請求項1または2に記載の装置。
- 前記パターンの面積が5,000〜500,000μm2である、請求項1〜3のいずれか一項に記載の装置。
- 前記基材が硬質基材である、請求項1〜4のいずれか一項に記載の装置。
- 前記基材が軟質基材である、請求項1〜4のいずれか一項に記載の装置。
- 前記基材のヤング率が5〜15kPaである、請求項6に記載の装置。
- 筋芽細胞の筋管への分化を促進するための方法であって、
(i)請求項1〜7のいずれか一項に記載の装置を準備すること、
(ii)前記装置の少なくとも1つの細胞接着パターン上に筋芽細胞(ドナーからの初代細胞、細胞株、同質遺伝子細胞株、誘導幹細胞を含む)を付着させること、
(iii)横紋筋管への細胞分化を促進し、かつ、細胞接着パターン上での筋管の伸長を拘束するために、前記筋芽細胞を所定のインキュベーション時間の間、分化培地中で培養すること
を含んでなる、方法。 - 骨格筋細胞、特に、筋管または筋芽細胞における変化を誘導する化合物をスクリーニングするための方法であって、
(i)請求項1〜7のいずれか一項に記載の装置を準備すること、
(ii)前記装置の少なくとも1つの細胞接着パターン上に筋芽細胞を付着させること、
(iii)筋管への細胞分化を促進するために、前記筋芽細胞を分化培地中で培養すること、
(iv)前記培養物に少なくとも1つの化合物を加えること、
(v)筋管を前記化合物とともに所定の時間インキュベーションした後、筋管の画像解析を行い、骨格筋細胞、特に、筋管または筋芽細胞における形態学的変化を測定することにより、筋管に及ぼす前記化合物の影響を決定すること
を含んでなる、方法。 - 骨格筋細胞、特に、筋管または筋芽細胞における筋毒性に関連する化合物のスクリーニングを可能とする、前記筋芽細胞が健常ドナーまたは細胞株から得られ、かつ、筋芽細胞分化、筋管成熟、筋管萎縮、筋管肥大、および骨格筋細胞、特に、筋管における細胞傷害性の不在を測定することにより、筋毒性に関する前記化合物の影響を決定するために画像解析が行われる、請求項9に記載の方法。
- 創薬分野において、骨格筋細胞、特に、筋管または筋芽細胞の萎縮または肥大に作用する治療用化合物を同定するための、前記筋芽細胞が所定の筋関連病態に罹患しているドナーからまたは細胞株から得られ、かつ、萎縮または肥大特性に関する前記化合物の影響を決定するために画像解析が行われる、請求項10に記載の方法。
- 前記の測定される形態学的変化が、化合物とのインキュベーション後の筋管の最大幅を含んでなり、かつ、画像解析が筋管画像の2値化、前記筋管の距離地図の計算およびの前記距離地図からの各筋管の最大幅の計算を含んでなる、請求項9〜11のいずれか一項に記載の方法。
- 所定の値より大きい最大幅を有する筋管を計数することをさらに含んでなる、請求項12に記載の方法。
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