JP6235795B2 - 細胞のリプログラミングのための組成物 - Google Patents
細胞のリプログラミングのための組成物 Download PDFInfo
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Description
(1)標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させるための組成物であって、
培養によりコロニー形成した胎盤由来細胞から抽出されたエキソソームを含む、前記組成物。
(2)胎盤由来細胞が胎盤由来幹細胞を含む、(1)記載の組成物。
(3)リプログラミングに関わる転写因子として、Oct3/4遺伝子、Nanog遺伝子およびSox−2遺伝子の発現を亢進させるための組成物である、(1)または(2)記載の組成物。
(4)エキソソームが、Oct3/4遺伝子およびSox−2遺伝子を実質的に含まない、(1)〜(3)のいずれかに記載の組成物。
(5)標的細胞をリプログラミングするための組成物である、(1)〜(4)のいずれかに記載の組成物。
(6)標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させるための組成物の製造方法であって、
a)胎盤由来細胞を培養してコロニー形成させる工程と、
b)コロニー形成した胎盤由来細胞を取得してさらに培養する工程と、
c)工程b)で得られた培養上清からエキソソームを抽出する工程と、
を含む、前記方法。
(7)工程a)が、胎盤由来細胞を14cells/cm2以下の密度で播種して培養し、コロニー形成させる工程である、(6)記載の方法。
(8)組成物が、リプログラミングに関わる転写因子として、Nanog遺伝子、Oct3/4遺伝子およびSox−2遺伝子の発現を亢進させるための組成物である、(6)または(7)記載の方法。
(9)胎盤由来細胞が胎盤由来幹細胞を含む、(6)〜(8)のいずれかに記載の方法。
(10)標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させる方法であって、
a)胎盤由来細胞を培養してコロニー形成させる工程と、
b)コロニー形成した胎盤由来細胞を取得してさらに培養する工程と、
c)工程b)で得られた培養上清からエキソソームを抽出する工程と、
d)エキソソームと標的細胞とを接触させる工程と、
を含む、前記方法。
(11)工程a)が、胎盤由来細胞を14cells/cm2以下の密度で播種して培養し、コロニー形成させる工程である、(10)記載の方法。
(12)リプログラミングに関わる転写因子として、Nanog遺伝子、Oct3/4遺伝子およびSox−2遺伝子の発現を亢進させる、(10)または(11)記載の方法。
(13)胎盤由来細胞が胎盤由来幹細胞を含む、(10)〜(12)のいずれかに記載の方法。
(14)標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させることにより、標的細胞をリプログラミングする方法である、(10)〜(13)のいずれかに記載の方法。
(15)標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させることにより、多分化能を持つ細胞を製造する方法である、(10)〜(13)のいずれかに記載の方法。
(16)培養によりコロニー形成した胎盤由来細胞であって、体細胞のOct3/4遺伝子、Nanog遺伝子およびSox−2遺伝子の発現を亢進させるエキソソームを産出することを特徴とする、前記細胞。
帝王切開の分娩により、ヒトの胎盤組織を得た。この胎盤組織をリン酸緩衝生理食塩水(PBS)で3回洗浄した。胎盤組織から外膜を除去し、メスや剃刀等を用いて組織を個片化した。胎盤組織10gあたり40mlの3mg/mlのコラーゲナーゼ(collagenase)、4mg/mlのディスパーゼ(dispase)を含有する溶液で、37℃で60分間の酵素処理を行った。その後、孔径100μmのストレイナーでフィルトレーションし、遠心分離装置で600g、5分間遠心分離し、その上清をアスピレートした。次に、胎盤組織10gあたり35mlのACKバッファーで5分間、溶血処理し、胎盤組織10gあたり35mlの3%ウシ胎児血清(FBS)と5U/mlヘパリン(Heparin)で溶血反応を止めた。さらに、遠心分離装置で600g、15分間遠心分離し、その上清をアスピレートした。MSCGM培地(Lonza社)でペレットを再懸濁し、細胞数計測した。
上記のようにして得られた胎盤由来細胞を、MSCGM培地を含むφ10cmディッシュに800個播種した(14cells/cm2)。3日おきに培地交換しながら2週間培養した。増殖してきた細胞をCFC(コロニー形成細胞)とした。
上記のCFCを定法に従い、φ15cmディッシュに2x106個播種した(13,000cells/cm2)。70%コンフルエントになったら、PBSで3回洗浄後、無血清DMEMに培地交換した。その後、48時間、37℃、5%CO2、飽和水蒸気条件下でインキュベートした。48時間経過後、培養上清を回収し、遠心分離装置で2000g、20分間遠心分離し、その上清を回収し、孔径0.2μmのフィルターでフィルトレーションすることにより、細胞成分を除去した。
上記培養上清を遠心分離装置で10,000g、30分間遠心分離した後、さらにその上清を100,000g、70分間遠心分離した。このペレットをPBSに懸濁し、さらに100,000g、70分間遠心分離した。このペレットを培養上清20mlあたり100μlのPBSにサスペンドした。以上のようにしてエキソソーム1を製造した。
組織培養用6ウェルプレート(AGC旭硝子)を準備し、このディッシュにヒト皮膚線維芽細胞(Lonzaより入手)を1×105個ずつ播種した。24時間後、ディッシュにエキソソーム1〜3をそれぞれ100μlずつ加えた(この時点を0日とする)。1日目および3日目のタイミングで、totalRNAをISOGEN II(NIPPON GENE)を用いて回収した。
上記RNAからLightCycler Real−Time PCR System(Roche Applied Science)を用いて、Oct3/4遺伝子、Sox−2遺伝子、Nanog遺伝子、TERT遺伝子のmRNAを定量した。
Claims (17)
- 標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させるための組成物であって、
培養によりコロニー形成した胎盤由来細胞から抽出されたエキソソームを含む、前記組成物。 - 胎盤由来細胞が胎盤由来幹細胞を含む、請求項1記載の組成物。
- リプログラミングに関わる転写因子として、Oct3/4遺伝子、Nanog遺伝子およびSox−2遺伝子の発現を亢進させるための組成物である、請求項1または2記載の組成物。
- エキソソームが、Oct3/4遺伝子およびSox−2遺伝子を実質的に含まない、請求項1〜3のいずれか1項記載の組成物。
- 標的細胞をリプログラミングするための組成物である、請求項1〜4のいずれか1項記載の組成物。
- 標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させるための組成物の製造方法であって、
a)胎盤由来細胞を培養してコロニー形成させる工程と、
b)コロニー形成した胎盤由来細胞を取得してさらに培養する工程と、
c)工程b)で得られた培養上清からエキソソームを抽出する工程と、
を含む、前記方法。 - 工程a)が、胎盤由来細胞を14cells/cm2以下の密度で播種して培養し、コロニー形成させる工程である、請求項6記載の方法。
- 工程b)が、無血清培地中でさらに培養する工程である、請求項6または7記載の方法。
- 組成物が、リプログラミングに関わる転写因子として、Nanog遺伝子、Oct3/4遺伝子およびSox−2遺伝子の発現を亢進させるための組成物である、請求項6〜8のいずれか1項記載の方法。
- 胎盤由来細胞が胎盤由来幹細胞を含む、請求項6〜9のいずれか1項記載の方法。
- 標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させる方法であって、
a)胎盤由来細胞を培養してコロニー形成させる工程と、
b)コロニー形成した胎盤由来細胞を取得してさらに培養する工程と、
c)工程b)で得られた培養上清からエキソソームを抽出する工程と、
d)エキソソームと標的細胞とを接触させる工程と、
を含む、前記方法。 - 工程a)が、胎盤由来細胞を14cells/cm2以下の密度で播種して培養し、コロニー形成させる工程である、請求項11記載の方法。
- 工程b)が、無血清培地中でさらに培養する工程である、請求項11または12記載の方法。
- リプログラミングに関わる転写因子として、Nanog遺伝子、Oct3/4遺伝子およびSox−2遺伝子の発現を亢進させる、請求項11〜13のいずれか1項記載の方法。
- 胎盤由来細胞が胎盤由来幹細胞を含む、請求項11〜14のいずれか1項記載の方法。
- 標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させることにより、標的細胞をリプログラミングする方法である、請求項11〜15のいずれか1項記載の方法。
- 標的細胞において複数のリプログラミングに関わる転写因子の発現を亢進させることにより、多分化能を持つ細胞を製造する方法である、請求項11〜15のいずれか1項記載の方法。
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |