JP2019537427A - X染色体の再活性化のためのhdac阻害剤組成物 - Google Patents
X染色体の再活性化のためのhdac阻害剤組成物 Download PDFInfo
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Abstract
Description
本出願は、2016年10月27日に出願され、発明の名称が「HDAC INHIBITORS FOR REACTIVATION OF THE X CHROMOSOME」である、米国仮出願第62/413,928号の優先権および利益を主張し、その全内容を参照により本明細書に援用する。
参照による援用
Xist長鎖非コードRNA(lncRNA)は、哺乳動物細胞中で、染色体全体のサイレンシングおよびX染色体の3次元構造のリモデリングを含むプロセスにおいて、X染色体不活性化(XCI)を媒介する。本発明の実施形態によれば、Xist lncRNAと相互作用し、X染色体遺伝子のXist依存性転写型サイレンシングに必要とされるタンパク質成分には、SHARP、SMRT、HDAC3、SAF−A、およびLBRタンパク質が含まれる。図1Aに示されているように、Xist lncRNAはSHARPに直接結合し、SHARPはSMRTに直接結合し、HDAC3はSMRTに直接結合する。同様に図1Aに示されているように、Xistのいくつかの他の領域は、SAF−Aタンパク質に結合し、SAF−AはX染色体遺伝子のゲノムDNAに直接結合する。図1Bに示されているように、LBR膜貫通タンパク質は、Xistに直接結合する。
Xistサイレンシング複合体相互作用の標的化
Xist媒介沈黙化遺伝子の再活性化
実施例1.Xist複合体を精製するためのRNAアンチセンス精製(RAP)法
実施例2.Xist相互作用タンパク質の同定
どのタンパク質がXist媒介転写型サイレンシングに必要とされるかを決定するために、同定されたタンパク質の各々をノックダウンし、Xist発現を誘導したときに、X染色体上の遺伝子発現のサイレンシングが起こらないことについてアッセイした(図2)。
実施例4.SAF−A局在化
実施例5.XistおよびRNAポリメラーゼIIの共局在化
実施例6.SHARPの追加のキャラクタリゼーション
実施例7.PRC2の動員
実施例8.実施例1〜7の材料および方法
RNAアフィニティー精製−質量分析(RAP−MS)
質量分析
RAP−MS実験およびコントロール
実施例9.Xist−LBR相互作用
実施例10.LBR媒介サイレンシングの役割
実施例11.LBRの架橋および免疫沈降(CLIP)
実施例12.LBRの結合ドメイン
実施例13.LBRを介した不活性X染色体の動員
実施例14.LBRが媒介するXistの局在化
実施例15.活性遺伝子へのXistの局在化およびRNA PolIIの排除
実施例16.Xistのモデル
実施例17.実施例9〜16の材料および方法
実施例18.MLF細胞における再活性化のための材料および方法 図7A〜7I
Claims (20)
- 細胞内で沈黙化X染色体遺伝子の発現を活性化するための組成物であって、
前記細胞に対して細胞毒性ではないヒストンデアセチラーゼ(HDAC)阻害剤と、
デオキシリボ核酸(DNA)メチル化の阻害剤と、
を含んでなる前記組成物。 - 前記HDAC阻害剤が少なくともHDAC3タンパク質を阻害する、請求項1に記載の組成物。
- 前記HDAC阻害剤が、前記細胞に対して細胞毒性を示すことなく、HDAC3活性を阻害する濃度である、請求項1に記載の組成物。
- 前記HDAC阻害剤が、SAHA、RGFP966、スクリプタイド(Scriptaid)、RG2833(RGFP109)、PCI−24781(アベキシノスタット(abexinostate))、CUDC−101、レスミノスタット(Resminostat)、モセチノスタット(Mocetinostat)(MGCD0103)、HPOB、エンチノスタット(Entinostat)(MS0275)、ドロキシノスタット(Droxinostat)、4SC−202、トリコスタチン(Trichostatin)A(TSA)、ロシリノスタット(Rocilinostat)(ACY−1215)、およびそれらの組み合わせからなる群から選択される、請求項1に記載の組成物。
- 前記HDAC阻害剤が、SAHA、RGFP966、スクリプタイド(Scriptaid)、およびそれらの組み合わせからなる群から選択される、請求項1に記載の組成物。
- 前記DNAメチル化の阻害剤が、5−アザシチジン(5−アザ)、5−アザ−2’デオキシシチジン(5−アザ−2’−dc)、RG108、SGI−1027、およびそれらの組み合わせからなる群から選択される、請求項1に記載の組成物。
- 細胞内で沈黙化X染色体遺伝子を活性化する方法であって、
請求項1に記載の組成物を前記細胞に投与すること
を含んでなる前記方法。 - 前記細胞が対象内にある、請求項7に記載の方法。
- 前記細胞が有糸***後細胞である、請求項7に記載の方法。
- 前記沈黙化X染色体遺伝子がXist依存性沈黙化X染色体遺伝子である、請求項7に記載の方法。
- 細胞内で沈黙化X染色体遺伝子を活性化する方法であって、
沈黙化X染色体遺伝子を有する前記細胞に再活性化組成物を投与することを含んでなり、前記再活性化組成物が、
前記細胞に対して細胞毒性ではないヒストンデアセチラーゼ(HDAC)阻害剤を含んでなる、
前記方法。 - 前記HDAC阻害剤が、前記細胞に対して細胞毒性を示すことなく、HDAC3活性を阻害する濃度である、請求項11に記載の方法。
- 前記HDAC阻害剤が、SAHA、RGFP966、スクリプタイド(Scriptaid)、RG2833(RGFP109)、PCI−24781(アベキシノスタット(abexinostate))、CUDC−101、レスミノスタット(Resminostat)、モセチノスタット(Mocetinostat)(MGCD0103)、HPOB、エンチノスタット(Entinostat)(MS0275)、ドロキシノスタット(Droxinostat)、4SC−202、トリコスタチン(Trichostatin)A(TSA)、ロシリノスタット(Rocilinostat)(ACY−1215)、およびそれらの組み合わせからなる群から選択される、請求項11に記載の方法。
- 前記HDAC阻害剤が、SAHA、RGFP966、スクリプタイド(Scriptaid)、およびそれらの組み合わせからなる群から選択される、請求項11に記載の方法。
- 前記再活性化組成物が、デオキシリボ核酸(DNA)メチル化の阻害剤をさらに含んでなる、請求項11に記載の方法。
- 前記DNAメチル化の阻害剤が、5−アザシチジン(5−アザ)、5−アザ−2’デオキシシチジン(5−アザ−2’−dc)、RG108、SGI−1027、およびそれらの組み合わせからなる群から選択される、請求項15に記載の方法。
- 前記細胞が対象内にある、請求項11に記載の方法。
- 前記細胞が有糸***後細胞である、請求項11に記載の方法。
- 前記沈黙化X染色体遺伝子がXist依存性沈黙化X染色体遺伝子である、請求項11に記載の方法。
- 前記HDAC阻害剤が少なくともHDAC3タンパク質を阻害する、請求項11に記載の方法。
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