JP6247472B2 - 幹細胞の未分化状態維持剤及び増殖促進剤 - Google Patents
幹細胞の未分化状態維持剤及び増殖促進剤 Download PDFInfo
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Description
(1)コロハの抽出物を有効成分として含有する幹細胞の増殖促進剤。
(2)コロハの抽出物を有効成分として含有する幹細胞の未分化状態維持剤。
(3)幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の製造方法。
(4)幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の増殖促進方法。
(5)幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の未分化状態維持方法。
幹細胞の未分化状態維持は、例えば、本発明に係る幹細胞の未分化状態維持剤又はコロハの抽出物非存在下で培養した幹細胞と比較して、本発明に係る幹細胞の未分化状態維持剤又はコロハの抽出物存在下で培養した該幹細胞において幹細胞未分化マーカー遺伝子の発現レベルがmRNAレベル又はタンパク質レベルで培養開始時の発現レベルと同程度のレベルに有意に維持されているか否かを決定することで評価することができる。幹細胞未分化マーカー遺伝子としては、例えばNanog遺伝子(Cell Res. 2007 Jan; 17(1):42-9. Review. Nanog and transcriptional networks in embryonic stem cell pluripotency. Pan G, Thomson JA.)等が挙げられる。
以下に、コロハを用いた溶媒抽出物の製造例を示す。
コロハ種子の乾燥物25gを粉砕し、得られた粉砕物に精製水500mLを加え、95〜100℃において2時間の抽出を行った。次いで、得られた抽出液を濾過に供し、さらに得られた濾液を濃縮及び凍結乾燥に供することで、コロハ種子の熱水抽出物を5.8g得た。
コロハ種子の乾燥物50gを粉砕し、得られた粉砕物にエタノール500mLを加え、常温において3日間の抽出を行った。次いで、得られた抽出液を濾過に供し、さらに得られた濾液を濃縮乾固に供することで、コロハ種子のエタノール抽出物を1.8g得た。
コロハ種子の種皮及び表層の一部を除いた乾燥物25gを粉砕し、得られた粉砕物に精製水500mLを加え、95〜100℃において2時間の抽出を行った。次いで、得られた抽出液を濾過に供し、さらに得られた濾液を濃縮及び凍結乾燥に供することで、コロハ種子胚乳の熱水抽出物を6.0g得た。
コロハ全草の乾燥物25gを粉砕し、得られた粉砕物に精製水500mLを加え、95〜100℃において2時間の抽出を行った。次いで、得られた抽出液を濾過に供し、さらに得られた濾液を濃縮及び凍結乾燥に供することで、コロハ全草の熱水抽出物を6.5g得た。
コロハ全草の乾燥物25gを粉砕し、得られた粉砕物にエタノール500mLを加え、常温において3日間の抽出を行った。次いで、得られた抽出液を濾過に供し、さらに得られた濾液を濃縮乾固に供することで、コロハ全草のエタノール抽出物を2.5g得た。
以下に、実施例1において製造した製造例1〜5のコロハの抽出物を用いた、幹細胞に対する未分化状態維持効果及び増殖促進効果の実験例とその結果を示す。
Dulbecco's Modified Eagle Medium培養液(Gibco社製)に、ウシ胎児血清(FBS、15%、Sigma社製)、ヌクレオシド液(100倍希釈、大日本製薬社製)、非必須アミノ酸液(100倍希釈、大日本製薬社製)、β2-メルカプトエタノール液(100倍希釈、大日本製薬社製)、L-グルタミン液(100倍希釈、大日本製薬社製)、ペニシリン(100unit/mL、Sigma社製)とストレプトマイシン(100μg/mL、Sigma社製)を加えて調製した培地を用いて、マウス胚性幹細胞(マウスES細胞:コスモバイオ社製)を、ゼラチン(Sigma社製)でコートした6cmディッシュに5x105個播種し、各抽出物(製造例1〜5)を最終濃度が0.001%になるように培地に添加し、3日間培養を続けた。
ATGCCTGCAGTTTTTCATCC(配列番号1)
GAGGCAGGTCTTCAGAGGAA(配列番号2)
Gapdh(内部標準)用のプライマーセット:
TGCACCACCAACTGCTTAGC(配列番号3)
TCTTCTGGGTGGCAGTGATG(配列番号4)
ヒト幹細胞培養液(TOYOBO社製)を用いて培養したヒト体性幹細胞(DSファーマバイオメディカル社製)を、6cmディッシュに3x105個播種し、コロハの抽出物(製造例1〜5)を最終濃度が0.001%になるように添加し、3日間培養を続けた。
Claims (8)
- コロハ(Trigonella Foenum-graecum)の抽出物を有効成分として含有する幹細胞の増殖促進剤。
- 前記抽出物が、熱水又はエタノール抽出物である、請求項1記載の幹細胞の増殖促進剤。
- コロハの抽出物を有効成分として含有する幹細胞の未分化状態維持剤。
- 前記抽出物が、熱水又はエタノール抽出物である、請求項3記載の幹細胞の未分化状態維持剤。
- 幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の製造方法。
- 幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の増殖促進方法。
- 幹細胞を、コロハの抽出物を含有する培地で培養する工程を含む、幹細胞の未分化状態維持方法。
- 前記抽出物が、熱水又はエタノール抽出物である、請求項5〜7のいずれか1項記載の方法。
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