JP2020110190A - 薬物輸送タンパク質および/または薬物代謝酵素をコード化する遺伝子を一過的に過剰発現する摂取できる凍結保存細胞 - Google Patents
薬物輸送タンパク質および/または薬物代謝酵素をコード化する遺伝子を一過的に過剰発現する摂取できる凍結保存細胞 Download PDFInfo
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Abstract
Description
手短に言うと、1日目に、「FreeStyle」293細胞および293−F細胞の各々を、補充CD293培地(すなわち、4mMのL−グルタミン(カリフォルニア州、カールズバッド所在のLife Technologies Corp社のGibco(登録商標)、カタログ番号25030−081から得られる)が補充されたCD293培地(カリフォルニア州、カールズバッド所在のLife Technologies Corp社の「Gibco」、カタログ番号11913−019から得られる))または6mMのL−グルタミンが補充された補充Excell(商標)293無血清培地(ミズーリ州、セントルイス所在のSigma−Aldrich社、Sigma、カタログ番号14571Cから得られる)を使用して、0.7〜1.0×106細胞/mlの密度で、適切なサイズの振盪フラスコ中に継代培養した。Cellometer(マサチューセッツ州、ロレンス所在のNexcelom Bioscience社から得られる)を使用して、細胞生存率および細胞の数を決定した。
手短に言うと、HEK293細胞を、100:1:1:1:10の比率で、カリフォルニア州、カールズバッド所在のLife Technologies Corp社の「Gibco」、カタログ番号11965118から得られるDMEM(高グルコース);カリフォルニア州、カールズバッド所在のLife Technologies Corp社の「Gibco」、カタログ番号15140−122から得られるペニシリン−ストレプトマイシン(10,000単位/ml);カリフォルニア州、カールズバッド所在のLife Technologies Corp社の「Gibco」、カタログ番号25030−081から得られるL−グルタミン(200mM);カリフォルニア州、カールズバッド所在のLife Technologies Corp社の「Gibco」、カタログ番号11360から得られるピルビン酸ナトリウム;ミズーリ州、セントルイス所在のSigma−Aldrich Corp社から得られるFBSを含有する平板培養用培地を使用して、5 Layer Corning(登録商標)CellStack(登録商標)(マサチューセッツ州、チュークスベリ所在のCorning Inc. Life Sciences社から得られる)内で培養した。1日目に、EPの約24時間前に、HEK293細胞をトリプシン処理し、細胞生存率および細胞の数を決定し、その後、細胞を、30〜40%のコンフルエンシーで新しい多層室フラスコに継代培養した。細胞を5%のCO2と共に37℃でインキュベーションした。
手短に言うと、基質溶液を、pH7.4のクレブス緩衝液(Krebs-Henseleit Buffer)(ミズーリ州、セントルイス所在のSigma−Aldrich社、Sigma、カタログ番号K3753から得られる)中の、OATP1B1*1aおよびOATP1B1*1bについて、2μMのエストラジオール−17β−グルクロニド(99%の低温E17βGおよび1%の[3H]−E17βG);OATP1B3について、2μMのCCK−8(99%の低温CCK−8および1%の[3H]−CCK−8);OAT1短について、1μMのパラ−アミノ馬尿酸(PAH)(90%の低温PAHおよび10%の[3H]−PAH);OAT1長について、1μMまたは3μMのパラ−アミノ馬尿酸(PAH)(90%の低温PAHおよび10%の[3H]−PAH);OAT3について、1μMまたは2μMのエストロン−3−硫酸(99%の低温E3Sおよび1%の[3H]−E3S);OAT1およびOCT2について、30μMの臭化テトラエチルアンモニウム(100%の[14C]−TEA);MATE1およびMATE2Kについて、10μMのメトホルミン(100%の[14C]−メトホルミン)または10μMの臭化テトラエチルアンモニウム(100%の[14C]−TEA)を使用して調製し、少なくとも20分間に亘り37℃でインキュベーションした。培養培地を、試験すべき細胞から吸引し、細胞を、予め暖めたKHB緩衝液で3回洗浄した。その後、細胞を10分間に亘り37℃で取り込み緩衝液と共にインキュベーションした。MATE1およびMATE2Kについて、細胞を洗浄し、10分間に亘り、20mMのNH4Clを含有するKHB緩衝液と共にプレインキュベーションした。試験は、各ウェル中に0.3mlの基質溶液を加えることによって開始し、37℃で5分間に亘り、OCT1およびOCT2のサンプルについては、10分間に亘り、インキュベーションした。
薬物輸送タンパク質および薬物代謝酵素、またはそれらの組合せからなる群より選択されるタンパク質をコード化する、1種類以上の一過的に過剰発現される遺伝子を含む、凍結保存された組換え細胞であって、前記薬物輸送タンパク質または前記薬物代謝酵素もしくはその組合せの活性が、凍結保存からの解凍後の該凍結保存された組換え細胞の集団において検出可能である、組換え細胞。
前記1種類以上の遺伝子が薬物代謝酵素をコード化する、実施形態1記載の組換え細胞。
前記薬物代謝酵素が、シトクロムP450、UDP−グルクロン酸転写酵素、アルコール脱水素酵素、モノアミン酸化酵素およびアルデヒド・オキシダーゼからなる群より選択される、実施形態2記載の組換え細胞。
ATP結合カセット輸送体および溶質輸送担体輸送タンパク質からなる群より選択されるタンパク質をコード化する1種類以上の遺伝子を一過的に過剰発現する、実施形態1記載の組換え細胞。
前記1種類以上の遺伝子が、MDR1/Mdr1a/Mdr1b、MRP1/Mrp1、MRP2/Mrp2、MRP3/Mrp3、MRP4/Mrp4、MRP5/Mrp5、MRP6/Mrp6、MRP7/Mrp7、MRP8/Mrp8、BCRP/Bcrp、BSEP/Bsep、OATP2/Oatp2、OATP1B3/Oatp1b3、OAT1/Oat1、OAT2/Oat2、OAT3/Oat3、OAT4/Oat4、OCT1/Oct1、OCT2/Oct2、OATP1/Oatp1、PEPT1/Pept1、PEPT2/Pept2、OCTN1/Octn1、OCTN2/Octn2、MATE1/Mate1、MATE2K/Mate2、URAT1/Urat1、ASBT/Asbt、およびNTCP/Ntcpからなる群より選択される、実施形態4記載の組換え細胞。
前記1種類以上の遺伝子が、MDR1/Mdr1a/Mdr1b、MRP1/Mrp1、MRP2/Mrp2、MRP3/Mrp3、MRP4/Mrp4、MRP5/Mrp5、MRP6/Mrp6、MRP7/Mrp7、MRP8/Mrp8、BCRP/Bcrp、およびBSEP/Bsepからなる群より選択されるATP結合カセット輸送体であるタンパク質をコード化する、実施形態4記載の組換え細胞。
前記1種類以上の遺伝子が、OATP2/Oatp2、OATP1B3/Oatp1b3、OAT1/Oat1、OAT2/Oat2、OAT3/Oat3、OAT4/Oat4、OCT1/Oct1、OCT2/Oct2、OCT3/Oct3、OATP1/Oatp1、PEPT1/Pept1、PEPT2/Pept2、OCTN1/Octn1、OCTN2/Octn2、MATE1/Mate1、MATE2K/Mate2、URAT1/Urat1、ASBT/Asbt、およびNTCP/Ntcpからなる群より選択される溶質輸送担体トランスポーターであるタンパク質をコード化する、実施形態4記載の組換え細胞。
前記1種類以上の遺伝子が、OATP1B1*1a、OATP1B1*1b、OATP1B3、OAT1、OAT3、OCT1、OCT2、MATE1およびMATE2Kから選択される、実施形態4記載の組換え細胞。
前記1種類以上の遺伝子が、ヒトまたはマウス、ラット、テンジクネズミ、イヌ、およびサルから選択される動物種から個別に由来する、実施形態1記載の組換え細胞。
前記細胞が哺乳類に由来する、実施形態1記載の組換え細胞。
前記細胞が、HEK293細胞、CHO細胞、MDCK細胞、LLC−PK1細胞、Caco−2細胞およびV79細胞からなる群より選択される、実施形態10記載の組換え細胞。
前記哺乳類が、ヒト、サル、イヌ、ラット、マウス、ブタおよびハムスターからなる群より選択される、実施形態10記載の組換え細胞。
前記細胞が肝細胞を含む、実施形態1記載の組換え細胞。
前記細胞が内皮細胞を含む、実施形態1記載の組換え細胞。
前記タンパク質の活性が、凍結保存からの解凍後の平板培養から少なくとも24時間後に前記細胞の集団において検出可能である、実施形態1記載の組換え細胞。
前記タンパク質の活性が、凍結保存からの解凍後の平板培養から少なくとも48時間後に前記細胞の集団において検出可能である、実施形態1記載の組換え細胞。
前記タンパク質の活性が、凍結保存からの解凍後の平板培養から少なくとも72時間後に前記細胞の集団において検出可能である、実施形態1記載の組換え細胞。
薬物輸送タンパク質および薬物代謝酵素からなる群より選択されるタンパク質をコード化する1種類以上の遺伝子を一過的に過剰発現する、一過的にトランスフェクションされた組換え細胞を調製する方法であって、細胞に、薬物輸送タンパク質または薬物代謝酵素をコード化する1種類以上の遺伝子を一過的にトランスフェクションする工程、およびトランスフェクションの48時間以内で一過的にトランスフェクションされた組換え細胞を凍結保存する工程を含む方法。
前記一過的にトランスフェクションする工程が、エレクトロポレーションを含む、実施形態18記載の方法。
Claims (8)
- 凍結保存された一過的にトランスフェクションされた組換え細胞を調製する方法であって、
細胞に、薬物輸送タンパク質をコード化する1種類以上の遺伝子を一過的にトランスフェクションして、一過的にトランスフェクションされた組換え細胞を提供する工程、および
一過的なトランスフェクションの48時間以内で前記一過的にトランスフェクションされた組換え細胞を凍結保存する工程、
を含み、
前記一過的にトランスフェクションされた組換え細胞の集団が、前記一過的にトランスフェクションされた組換え細胞を凍結保存する前に、検出可能なレベルで、前記薬物輸送タンパク質をコード化する1種類以上の遺伝子を一過的に過剰発現し、
前記細胞の一過的なトランスフェクションが、エレクトロポレーションを含み、
前記1種類以上の遺伝子がMATE2Kであり、前記細胞がHEK293である、
方法。 - 前記凍結保存前の検出可能なレベルが、前記薬物輸送タンパク質の特定の典型的基質に対しての該薬物輸送タンパク質の活性であり、
前記凍結保存前の検出可能なレベルが、少なくとも5の取り込み比である、
請求項1に記載の方法。 - 前記凍結保存前の検出可能なレベルが、前記薬物輸送タンパク質の特定の典型的基質に対しての該薬物輸送タンパク質の活性であり、
前記凍結保存前の検出可能なレベルが、5〜25の取り込み比である、
請求項1に記載の方法。 - 前記一過的にトランスフェクションされた組換え細胞の集団が、前記凍結保存からの解凍後に検出可能なレベルで、前記薬物輸送タンパク質をコード化する1種類以上の遺伝子を一過的に過剰発現し、
前記凍結保存からの解凍後の前記検出可能なレベルが、前記薬物輸送タンパク質の特定の典型的基質に対しての前記薬物輸送タンパク質の活性であり、
前記凍結保存からの解凍後の前記検出可能なレベルが、少なくとも5の取り込み比である、
請求項1に記載の方法。 - 前記一過的にトランスフェクションされた組換え細胞が、一過的なトランスフェクション後約24時間〜約48時間で凍結保存される、
請求項1に記載の方法。 - 凍結保存された一過的にトランスフェクションされた組換え細胞を調製する方法であって、
細胞に、薬物輸送タンパク質をコード化する1種類以上の遺伝子を一過的にトランスフェクションして、一過的にトランスフェクションされた組換え細胞を提供する工程、および
トランスフェクションの48時間以内で前記一過的にトランスフェクションされた組換え細胞を凍結保存する工程、
を含み、
前記細胞の一過的なトランスフェクションが、エレクトロポレーションを含み、
前記1種類以上の遺伝子がMATE2Kであり、前記細胞がHEK293である、
方法。 - 前記一過的にトランスフェクションされた組換え細胞が、トランスフェクション後30分間〜24時間で凍結保存される、請求項6に記載の方法。
- 請求項6に記載の方法により調製される、凍結保存された一過的にトランスフェクションされた組換え細胞。
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