JP6793037B2 - Egf又はbfgfを含む培地で培養した脂肪由来幹細胞の増殖及び治療能力を検出するマーカー並びにその用途 - Google Patents
Egf又はbfgfを含む培地で培養した脂肪由来幹細胞の増殖及び治療能力を検出するマーカー並びにその用途 Download PDFInfo
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Description
実施例1−1:ヒト脂肪由来間質幹細胞の培養
ドナーから脂肪組織を分離し(Antorogen社、大韓民国京畿道所在)、得られた脂肪組織から脂肪由来間質幹細胞を分離した。血液を除去するために脂肪組織を同じ容量のKRB(クレブスリンガー重炭酸塩)溶液で34回洗浄した。脂肪組織と同じ容量のコラゲナーゼ溶液を入れ、37℃の水浴中で反応させた。これを遠心分離用チューブに移し入れ、20℃、1200rpmで10分間遠心分離した。上澄み液である脂肪層を除去し、下層のコラゲナーゼ溶液が揺れないように注意して分離した。基礎培地を入れて懸濁させた後、20℃、1200rpmで5分間遠心分離した。この時、下に沈むものが間質血管細胞群であるので、上澄み液を除去した。間質血管細胞群を基礎培地に懸濁させ、培養容器に接種して37℃、5%CO2インキュベーターで24時間培養した。培養液を除去した後、リン酸緩衝溶液で洗浄し、基礎培地又は基礎培地に塩基性線維芽細胞増殖因子(bFGF)が1ng/mlの濃度で含まれた培地、又は基礎培地に上皮細胞増殖因子(EGF)が5ng/mlの濃度で含まれた培地を用いて増殖させた。脂肪由来間質幹細胞が培養容器の80〜90%程度に成長したらトリプシンを処理し、単一細胞に分離して取得した。得られた細胞を増殖培地で1:31:4に希釈して継代培養を行った(特許文献1)。培養培地の組成による遺伝子発現の差を分析するために、10%FBSを含むDMEMである基礎培地で培養した5継代細胞と基礎培地に1ng/mlbFGFを含む増殖培地で培養した5継代の細胞を回収した。
実施例2-1:ヒト脂肪由来間質幹細胞の培養
ドナー17人から脂肪組織を分離して、(Antorogen社、大韓民国京畿道所在)実施例1と同様に、脂肪由来幹細胞を培養した。
全RNAは、QIAGENキット(RNeasy Maxi kit:cat#75162)を使用して分離し、Experion RNA StdSens(Bio-Rad社)チップを用いて定量した。まず、培養された前記脂肪由来幹細胞を150μlのβ-メルカプトエタノールを添加した15mlのキット内の分解緩衝液に溶解させた。これに15mlの70%エタノールを入れてよく混ぜた後、3000gで5分間遠心分離することによって全RNAを膜に付着させた。二回洗浄した後、1.2mlのRNaseの存在しない水を加えて全RNAを分離した。
前記抽出された全RNAをIllumina TotalPrep RNA Amplification Kit(Ambion社)を用いてハイブリダイゼーションした。T7 Oligo(dT)プライマーを用いてcDNAを合成し、ビオチン-UTPを用いて、in vitro転写(in vitro transcription)を実施してビオチン標識cRNAを製造した。製造されたcRNAは、ナノドロップ(NanoDrop)を用いて定量した。脂肪由来幹細胞で製造されたcRNAをHuman-6 V2(Illumina社)チップにハイブリダイゼーションした。ハイブリダイゼーションした後、非特異的ハイブリダイゼーションを除去するために、Illumina Gene Expression System洗浄液(Illumina社)を用いてDNAチップを洗浄し、洗浄したDNAチップは、ストレプトアビジン-Cy3(Amersham社)の蛍光染色剤で標識した。蛍光標識されたDNAチップは、共焦点レーザースキャナー(Confucal Laser Scanner、Illumina社)を用いてスキャンし、各スポットに存在する蛍光のデータを得てTIFF形式のイメージファイルとして保存した。TIFFイメージファイルをBead Studio version 3(Illumina社)で定量し、各スポットの蛍光値を定量した。定量した結果は、Avadis Prophetic version 3.3(Strand Genomics社)プログラムで「クォンタイル(quantile)」機能を用いて補正した。
17組のドナーの脂肪幹細胞の試料(基礎培地と増殖培地の培養細胞)を用いて、実施例2で確認された遺伝子の発現量をRT-PCR法により分析し、実施例2の方法により全RNAを分離した。
各試料の全RNA2μg、プライマーである50M オリゴ(dT)1μlと10mM dNTP 2.5μlを入れて、RNase阻害剤であるDEPCが含まれている滅菌水で全体が25μl になるようにしてRNA/プライマー混合溶液を作製した。65℃で5分間反応させた後、55℃に移して保管した。次に、10× RT 緩衝液5μl 、25mM MgCl210μl、0.1 M DTT5μl、RNase inhibitor1μl、SuperScriptIII逆転写酵素1μlを入れて全体が25μlになるようにした後、55℃で保管中のRNA/プライマー混合溶液と混合してから55℃で50分間反応させた。その後、85℃で5分間反応させることで逆転写酵素を不活性化させた後、氷に入れて反応を終結させた。マーカー遺伝子を定量するための標準的な遺伝子としてRPL13Aを使用した。標準遺伝子のプライマーを使用してRT-PCR反応を行い、標準遺伝子RPL13Aの発現量が等しくなるようにcDNAの濃度を補正した。まず、それぞれのcDNAを20倍希釈した後、希釈された試料2μlを用いて、PCR反応を行った。PCRは、2×PCR premix(Hot start社)15μl、2μlのPRL13A正方向プライマー、2μlのPRL13A逆方向プライマー、11μlの蒸留水を入れて使用し、20サイクル、23サイクル、25サイクルを行った。この時のRT-PCR反応条件は、94℃で30秒、50℃で30秒、72℃で1分行った。使用されたRPL13Aプライマーは正方向5'-CATCGTGGCTAAACAGGTACTG-3 '(配列番号1)、逆方向5'-GCACGACCTTGAGGGCAGC-3'(配列番号2)である。PCR産物を2%アガロースゲルにロードして電気泳動した後、ゲルの写真を撮り、画像をTotalLab v1.0プログラム(Nonlinear Dynamix社)で定量した後、再び補正してPCRを行って定量するという方法で、各試料の濃度を同様に補正した。
同じ量になるように希釈したcDNAを用いて、前記遺伝子のセンスプライマー及びアンチセンスプライマーを用いてPCRを行った。cDNA3μl、2× premix10μl、プライマー各2μl(20 pmole)、蒸留水2μlを混合して溶液の総量を20μlになるように作製し、PCR反応は94℃で1分、54℃で30秒、72℃で1分とし、各遺伝子ごとのサイクルは異なるようにした。PCR産物を確認するために、2%アガロースゲルを用いて電気泳動し、イメージ装置を用いて分析した。リアルタイムRT-PCRは、Qiagen社(CA、USA)のDNASYBRI試薬とLightCycler(Roche社)を用いた。融解曲線(Melt Curve )分析により、PCR産物の質を評価し、遺伝子発現量は、LightCycler version 3.5 software(Roche社)を用いて分析した。前記RT-PCR/リアルタイムPCRで使用した遺伝子の特異的プライマーと対照プライマーの配列(配列番号1〜16)は、表1に記載した。
ドナーの脂肪幹細胞の試料(基礎培地と増殖培地で培養)を用いて、実施例3で確認された遺伝子のうち一部の発現量をウエスタンブロット分析法でタンパク質定量を介して分析した。
Claims (9)
- PTGER2遺伝子のmRNA又はそのタンパク質レベルを測定する製剤を含む、EGF又はbFGFを含む培地で培養された脂肪由来幹細胞が基礎培地で培養された脂肪由来幹細胞に比べて増殖能力に優れていることを確認するためのマーカー検出用組成物。
- 請求項1に記載の組成物であって、
AGPAT9、ANXA10、IGF2BP3、ITGA11、PAWR及びSFRP2からなる群より選択される1つ以上の遺伝子のmRNA又はそのタンパク質レベルを測定する製剤をさらに含む、
組成物。 - 前記遺伝子のmRNAレベルを測定する製剤が、前記遺伝子に特異的に結合するプライマー対又はプローブを含む、請求項1または2に記載の組成物。
- 前記タンパク質レベルを測定する製剤が、前記タンパク質に特異的な抗体を含むものである、請求項1または2に記載の組成物。
- 請求項1又は2の組成物を含む、EGF又はbFGFを含む培地で培養された脂肪由来幹細胞が基礎培地で培養された脂肪由来幹細胞に比べて増殖能力に優れていることを確認するためのマーカー検出用キット。
- 前記キットが、RT-PCRキット、DNAチップキット又はタンパク質チップキットである、 請求項5に記載のマーカー検出用キット。
- EGF又はbFGFを含む培地で培養された脂肪由来幹細胞のPTGER2遺伝子のmRNA又はそのタンパク質レベルを測定する段階を含む、前記脂肪由来幹細胞が基礎培地で培養された脂肪由来幹細胞に比べて増殖能力に優れていることを確認するための方法。
- 請求項7に記載の方法であって、
EGF又はbFGFを含む培地で培養した脂肪由来幹細胞のAGPAT9、ANXA10、IGF2BP3、ITGA11、PAWR及びSFRP2からなる群より選択される1つ以上の遺伝子のmRNA又はそのタンパク質レベルを測定する段階をさらに含む、
方法。 - 上皮増殖因子(EGF)又は塩基性線維芽細胞増殖遺伝子(bFGF)を含む培地で培養した脂肪由来幹細胞が、基礎培地で培養された脂肪由来幹細胞に比べて増殖能力に優れていることを確認するための、PTGER2遺伝子のmRNA又はそのタンパク質レベルを測定するための製剤の使用。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130067365A KR101603633B1 (ko) | 2013-06-12 | 2013-06-12 | EGF 또는 bFGF를 포함하는 배지에서 배양한 지방유래 줄기세포의 증식 및 치료능력 탐지 마커 및 이의 용도 |
KR10-2013-0067365 | 2013-06-12 | ||
PCT/KR2014/005110 WO2014200256A1 (ko) | 2013-06-12 | 2014-06-11 | Egf 또는 bfgf를 포함하는 배지에서 배양한 지방유래 줄기세포의 증식 및 치료능력 탐지 마커 및 이의 용도 |
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