JP2022531846A - 間葉系幹細胞由来のエキソソーム生産方法およびこれから製造された培養液 - Google Patents
間葉系幹細胞由来のエキソソーム生産方法およびこれから製造された培養液 Download PDFInfo
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Abstract
Description
脂肪組織は、通常、脂肪吸入術で得ることができるが、これに限定されない。脂肪吸入により得られた脂肪組織から次のようにヒト脂肪由来間葉系幹細胞を分離した:
摘出した脂肪組織をリン酸緩衝生理食塩水(Phosphate buffered saline,PBS)で洗浄した。洗浄した脂肪組織を小さい切片に作成した後、0.1%type II collagenaseを添加した。37℃で30分間処理した後、10%ウシ胎児血清(FBS)と低濃度グルコースDMEM(low-glucose Dulbecco’s Modified Eagle’s Medium)(10% FBS low-glucose DMEM)を添加して酵素反応を不活性化し、300xgで10分間2回遠心分離を行った。上澄み液(supernatant)を捨てて、残ったペレットを10%FBS低濃度グルコースDMEMで浮遊した後、100μmのナイロンメンブレン(nylon membrane)を通過したろ液を300xgで10分間遠心分離して、ペレットを集めた。
前記培養した幹細胞からエキソソームの分離のために、4~10継代の間葉系幹細胞を継代培養時に、EGF 5ng/mlを添加した完全培地(complete media)で80%~100%コンフルエンシー(confluency)まで72時間ごとに培地を交換しながら培養して、分化能と増殖能を増加させた。
100mmペトリ皿で培養した100%コンフルエンシーの間葉系幹細胞(5×106Cells)をPBSで3回洗浄し、低濃度グルコースDMEMに基質培地を交換した。前記基質培地にTNFαを50ng/mlの濃度で処理しつつ、シクロヘキシミド(cycloheximide)の濃度を増加させて共に処理した間葉系幹細胞から分離したエキソソームの濃度をNTAで測定した。
実施例3の基質培地にTNFα(50ng/ml)とCycloheximide(5,000ng/ml)を処理した後、所定の時間の間37℃、5%CO2培養器で培養した培養液から幹細胞エキソソームを分離し、エキソソームの濃度をNanoparticle-Tracking Analysis(NTA)で測定して、表2に示した。下記表2を参照すると、30時間~100時間の間TNFα(50ng/ml)とCycloheximide(5,000ng/ml)を処理した場合、細胞培養液1ml当たり1.1×1011以上のエキソソームが分離されることを確認できた。
150mmペトリ皿で培養した100%コンフルエンシー(1.5×107Cells)の間葉系幹細胞をPBSで3回洗浄した。低濃度グルコースDMEMに交換した間葉系幹細胞にTNFα(50ng/ml)とcycloheximide(5ug/ml)の併用添加(実施例14)、cycloheximide(5ug/ml)の添加(実施例15)、TNFα(50ng/ml)の添加(比較例1)、1uMのStaurosporineの添加(比較例2)、2uMのStaurosporineの添加(比較例3)、Thapsigargin(5uM)の添加(比較例4)、アミノ酸欠乏培地(HBSS:Hank’s balanced salt solution)(比較例5)、ブドウ糖欠乏培地[Gluc(-):Glucose-depleted media](比較例6)、基質培地(10%PBS low-glucose-DMEM)(比較例7)で48時間培養した。その後、上述した分離方法によって培養液からエキソソームを分離した。
Claims (15)
- 間葉系幹細胞から細胞サンプルを収得する段階と、
前記細胞サンプルを低濃度グルコースDMEM(low-glucose Dulbecco’s Modified Eagle’s Medium)培地で継代培養する段階と、
前記継代培養した細胞をタンパク質合成阻害酵素が含まれた基質培地で培養させた後、細胞培養液を収得する段階と、
前記細胞培養液からエキソソームを分離する段階と、を含むことを特徴とする間葉系幹細胞由来のエキソソーム生産方法。 - 前記細胞培養液を収得する段階において、
前記基質培地は、TNFαをさらに含むことを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記タンパク質合成阻害酵素は、
シクロヘキシミド(Cycloheximide)、アニソマイシン(Anisomycin)、アウリントリカルボン酸(Aurintricarboxylic acid)、ジフテリア毒素(Diphtheria toxin)、エデイン(Edeine)、フシジン酸(Fusidic acid)、パクタマイシン(Pactamycin)、ピューロマイシン(Puromycin)、リシン(Ricin)、フッ化ナトリウム(Sodium fluoride)、スパルソマイシン(Sparsomycin)、テトラサイクリン(Tetracycline)およびトリコデルマ(Trichoderma)からなる群から選択されるいずれか一つ以上であることを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記基質培地は、
TNFα:タンパク質合成阻害酵素の割合が1:10~1:2000であることを特徴とする請求項2に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記TNFαは、5~500ng/mlの濃度で含まれることを特徴とする請求項4に記載の間葉系幹細胞由来のエキソソーム生産方法。
- 前記TNFαおよびタンパク質合成阻害酵素の処理時間は、30時間~100時間であることを特徴とする請求項2に記載の間葉系幹細胞由来のエキソソーム生産方法。
- 前記細胞培養液は、
エキソソームの数、エキソソーム由来タンパク質およびエキソソーム由来RNAのうちいずれか一つ以上の含有量を増加したことを特徴とする請求項2に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記細胞培養液1ml当たり1.1×1011個以上のエキソソームが分離されることを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。
- 前記細胞サンプルを継代培養する段階において、
前記培地は、EGF、FGF-2、GDF11、KGF、HGF、PDGF、VEGF、IGFおよびTGF-bからなる群から選択される一つ以上を含み、
4~10継代培養することを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記エキソソームのマーカーは、
CD63、CD9、CD81、S1PR1およびS1PR3からなる群から選択される一つ以上であることを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記サンプルを収得する段階において、
前記間葉系幹細胞は、
脂肪組織または胎盤組織から収得することを特徴とする請求項1に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 前記幹細胞は、
胚性幹細胞、成体幹細胞または誘導多能性幹細胞(Induced pluripotent stem cell,IPS)であることを特徴とする請求項11に記載の間葉系幹細胞由来のエキソソーム生産方法。 - 請求項1~12のいずれか一項に記載の方法を用いて生産された間葉系幹細胞由来のエキソソームを含む培養液。
- 請求項1~12のいずれか一項に記載の方法を用いて生産された間葉系幹細胞由来のエキソソームを有効成分として含む薬学組成物。
- 請求項1~12のいずれか一項に記載の方法を用いて生産された間葉系幹細胞由来のエキソソームを有効成分として含む化粧料組成物。
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EP3943597B1 (en) | 2024-04-17 |
BR112022008056B1 (pt) | 2024-01-23 |
CN113973498A (zh) | 2022-01-25 |
BR112022008056A2 (pt) | 2022-12-06 |
EP3943597A1 (en) | 2022-01-26 |
KR102184428B1 (ko) | 2020-11-30 |
US20220348881A1 (en) | 2022-11-03 |
CN113973498B (zh) | 2023-04-14 |
US11879138B2 (en) | 2024-01-23 |
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JP7449590B2 (ja) | 2024-03-14 |
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