JP2015084653A - 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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Abstract
Description
そこで、本発明は、上述した実情に鑑み、幹細胞を、未分化状態を維持させたまま、効率良く増殖させる方法を提供することを目的とする。
(1)トウガシ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)トウガシ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、トウガシ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、トウガシ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、トウガシ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。
本発明に係る幹細胞の増殖促進剤又は未分化状態維持剤は、トウガシの抽出物を有効成分として含有するものである。本発明に係る幹細胞の増殖促進剤又は未分化状態維持剤によれば、幹細胞の未分化状態を維持させたまま、幹細胞増殖を促進でき、当該薬剤は、再生医療や再生美容等の組織再生の分野において有用な薬剤である。さらに、幹細胞の未分化状態維持又は増殖促進のための研究用試薬として、本発明に係る幹細胞の増殖促進剤又は未分化状態維持剤を使用することができる。
幹細胞の培養条件としては、例えば35〜38℃(好ましくは36〜37℃)が挙げられる。
以下に、トウガシを用いた溶媒抽出物の製造例を示す。
なお、本実施例で使用したトウガシは、市販のトウガシである。
トウガシの乾燥物100gに精製水800mL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、トウガシの熱水抽出物を1.5g得た。
トウガシの乾燥物100gに50(v/v)%エタノール水溶液400mLを加え、常温において7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、トウガシの50%エタノール抽出物を1.3g得た。
トウガシの乾燥物100gにエタノール1Lを加え、常温において7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、トウガシのエタノール抽出物を2.3g得た。
以下に、実施例1において製造した製造例1〜3のトウガシの抽出物を用いた、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1〜3)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)
未分化状態維持効果は、培養開始時のマウスES細胞におけるNanog mRNAの発現量を内部標準であるGapdh mRNAの発現量に対する割合として算出したNanogの遺伝子相対発現量(Nanog遺伝子発現量/Gapdh遺伝子発現量)の値を100%未分化状態とし、これに対し、培養3日後のES細胞におけるNanogの遺伝子相対発現量の値を算出し、評価した。
これらの試験結果を以下の表1に示す。
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、トウガシの抽出物(製造例1〜3)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。
これらの試験結果を以下の表2に示す。
Claims (5)
- トウガシ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。
- トウガシ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。
- 幹細胞を、トウガシ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、トウガシ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、トウガシ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。
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