JP2020530998A - Cho細胞内の組込み部位 - Google Patents
Cho細胞内の組込み部位 Download PDFInfo
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- JP2020530998A JP2020530998A JP2020506795A JP2020506795A JP2020530998A JP 2020530998 A JP2020530998 A JP 2020530998A JP 2020506795 A JP2020506795 A JP 2020506795A JP 2020506795 A JP2020506795 A JP 2020506795A JP 2020530998 A JP2020530998 A JP 2020530998A
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Abstract
Description
本発明のさらに別の態様において、目的のタンパク質を高収率で産生する本発明のCHO細胞の使用が提供される。
S100A遺伝子クラスター内への1つ以上の異種ポリヌクレオチドの安定的な組込み
CHO細胞
タンパク質生産
細胞の選択および保持
標的を絞った組込みのためのZFN技術
遺伝子導入手法
Cel I測定−ZFN活性
接合PCR(jPCR)
IgG発現細胞のFACS濃縮
産生性/力価
実施例1:
ZFN活性を確認しドナープラスミドを調製した後に、電気穿孔法によりIgG抗体をコードする発現カセットおよび標的特異的ZFN13対を含む非線形プラスミドによって、これら細胞は同時に遺伝子導入された。従って、目的のIgGタンパク質をコードするドナープラスミドは、ランダムにまたは相同組換えを介して線形化されている。ZFN mRNAの潜伏期間と切断効率を改善するように、細胞に30℃で48時間の低温衝撃を加えた。電気穿孔法後の4日目または5日目に、ゲノムDNAを回収して不適正な塩基対に特異的な核酸分解酵素測定であるCel-I測定を実行して、ZFN活性を確認した。
実施例2:
実施例3:
S100A遺伝子クラスター内のホットスポット部位を検証するために、TIのために付加するジンクフィンガー核酸分解酵素を表3に示すように設計して生成し、実施例1で説明したような産生プールを形成した。図3Aは、個々のZFNの位置、およびNCBI参照配列:NW_003613854.1を持つS100A遺伝子クラスター内のホットスポット部位を示す。ZNF7〜14の組込み部位が示され、それらは「非破壊的で産生的」、「非破壊的で低/非産生的」、「破壊的で低/非産生的」の各部位に分類される。
実施例4:
実施例5:
本発明は以下の項目を含む。
1.チャイニーズハムスター卵巣(CHO)細胞ゲノムのS100A遺伝子クラスター内に安定的に組込まれた少なくとも1つの異種ポリヌクレオチドを含むCHO細胞であって、
a)少なくとも1つの異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの上流で、配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または
b)少なくとも1つの異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの下流で、配列番号2のヌクレオチド1〜15,120の配列に対応するゲノム標的領域内に組込まれる、CHO細胞。
2.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド30〜19,000、配列番号1のヌクレオチド2,940〜19,000、配列番号1のヌクレオチド4,740〜19,000、配列番号1のヌクレオチド6,480〜19,000、配列番号1のヌクレオチド8,280〜19,000、配列番号1のヌクレオチド10,020〜19,000、または配列番号1のヌクレオチド11,820〜19,000に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド1〜13,160、配列番号2のヌクレオチド1〜12,000、または配列番号2のヌクレオチド1〜10,260に対応する、項目1に記載のCHO細胞。
3.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド11,820〜18,720、配列番号1のヌクレオチド13,560〜18,720、配列番号1のヌクレオチド15,360〜18,720、または配列番号1のヌクレオチド17,100〜18,720に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド660〜10,260、配列番号2のヌクレオチド1,320〜10,260、または配列番号2のヌクレオチド1,480〜10,260に対応する、項目1または2に記載のCHO細胞。
4.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド11,820〜18,380、配列番号1のヌクレオチド13,560〜18,380、配列番号1のヌクレオチド15,360〜18,380、または配列番号1のヌクレオチド17,100〜18,380に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド3,180〜10,260、配列番号2のヌクレオチド4,920〜9,000、または配列番号2のヌクレオチド6,720〜8,460に対応する、項目1〜3のいずれか1項に記載のCHO細胞。
5.前記少なくとも1つの異種ポリヌクレオチドは、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれる、先行する項目のいずれか1項に記載のCHO細胞。
6.前記少なくとも1つの異種ポリヌクレオチドは、RNAおよび/またはタンパク質をコードする、先行する項目のいずれか1項に記載のCHO細胞。
7.前記RNAは、mRNA、miRNA、またはshRNAである、項目6に記載のCHO細胞。
8.前記少なくとも1つの異種ポリヌクレオチドは、治療用タンパク質、好ましくは抗体、融合タンパク質、サイトカイン、および成長因子からなる群より選択される治療用タンパク質をコードする、項目6に記載のCHO細胞。
9.前記少なくとも1つの異種ポリヌクレオチドは、レポーター遺伝子および選択マーカー遺伝子からなる群より選択されるマーカー遺伝子である、項目6に記載のCHO細胞。
10.前記マーカー遺伝子は、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれ、前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、請求項9に記載のCHO細胞。
11.前記CHO細胞は、CHO-DG44細胞、CHO-K1細胞、CHO-DXB11細胞、CHO-S細胞、CHOグルタミン合成酵素(GS)欠損細胞、またはこれら細胞のいずれかの派生物である、先行する項目のいずれか1項に記載のCHO細胞。
12.前記ゲノム標的領域は、請求項1〜11に記載の前記配列のうちのいずれか1つの配列、またはその配列に少なくとも80%の配列同一性を有する配列からなる、先行する項目のいずれか1項に記載のCHO細胞。
13.前記少なくとも1つの異種ポリヌクレオチドは、前記CHO細胞ゲノムのS100A遺伝子クラスターの一方または両方の対立遺伝子内に安定的に組込まれる、先行する項目のいずれか1項に記載のCHO細胞。
14.CHO細胞を産生する方法であって、
a)CHO細胞を提供する工程、および
b)異種ポリヌクレオチドを前記CHO細胞内に導入する工程を含み、前記異種ポリヌクレオチドは、CHO細胞ゲノムのS100A遺伝子クラスター内に安定的に組込まれ、
i)前記異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの上流で、配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または
ii)前記異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの下流で、配列番号2のヌクレオチド1〜15,120の配列に対応するゲノム標的領域内に組込まれる、方法。
15.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド30〜19,000、配列番号1のヌクレオチド2,940〜19,000、配列番号1のヌクレオチド4,740〜19,000、配列番号1のヌクレオチド6,480〜19,000、配列番号1のヌクレオチド8,280〜19,000、配列番号1のヌクレオチド10,020〜19,000、または配列番号1のヌクレオチド11,820〜19,000に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド1〜13、160、配列番号2のヌクレオチド1〜12,000、または配列番号2のヌクレオチド1〜10,260に対応する、項目14に記載の方法。
16.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド11,820〜18,720、配列番号1のヌクレオチド13,560〜18,720、配列番号1のヌクレオチド15,360〜18,720、または配列番号1のヌクレオチド17,100〜18,720に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド660〜10,260、配列番号2のヌクレオチド1,320〜10,260、または配列番号2のヌクレオチド1,480〜10,260に対応する、項目14または15に記載の方法。
17.a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド11,820〜18,380、配列番号1のヌクレオチド13,560〜18,380、配列番号1のヌクレオチド15,360〜18,380、または配列番号1のヌクレオチド17,100〜18,380に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド3,180〜10,260、配列番号2のヌクレオチド4,920〜9,000、または配列番号2のヌクレオチド6,720〜8,460に対応する、項目14〜16のいずれか1項に記載の方法。
18.前記少なくとも1つの異種ポリヌクレオチドは、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれる、項目14〜17のいずれか1項に記載の方法。
19.前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、項目18に記載の方法。
20.前記少なくとも1つの異種ポリヌクレオチドは、RNAおよび/またはタンパク質をコードする、項目14〜19のいずれか1項に記載の方法。
21.前記RNAは、mRNA、miRNA、またはshRNAである、項目20に記載の方法。
22.前記少なくとも1つの異種ポリヌクレオチドは、治療用タンパク質、好ましくは抗体、融合タンパク質、サイトカイン、および成長因子からなる群より選択される治療用タンパク質をコードする、項目20に記載の方法。
23.前記少なくとも1つの異種ポリヌクレオチは、レポーター遺伝子および選択マーカー遺伝子からなる群より選択されるマーカー遺伝子である、項目20に記載の方法。
24.前記マーカー遺伝子は、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれ、前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、項目23に記載の方法。
25.前記異種ポリヌクレオチドは、
a)配列特異的DNA編集酵素、または
b)部位特異的組換え酵素を用いて、前記CHO細胞ゲノム内に導入される、項目14〜24のいずれか1項に記載の方法。
26.a)前記配列特異的DNA編集酵素は、部位特異的核酸分解酵素であり、好ましくは、ジンクフィンガー核酸分解酵素(ZFN)、メガ核酸分解酵素、転写活性化因子様エフェクター核酸分解酵素(TALEN)、およびCRISPR関連核酸分解酵素からなる群より選択され、および/または
b)前記部位特異的組換え酵素は、λインテグラーゼ、φC31インテグラーゼ、Cre、Dre、およびFlpからなる群より選択される、項目25に記載の方法。
27.a)CHO細胞を提供する工程、および
aa)第1の異種ポリヌクレオチドを前記CHO細胞内に導入する工程を含み、前記第1の異種ポリヌクレオチドは、マーカー遺伝子であり、かつ部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接する発現カセットの一部分として、前記CHO細胞ゲノムの前記S100A遺伝子クラスター内に安定的に組込まれ、
i)前記異種ポリヌクレオチドは、前記S100A3/A4/A5/A6の主遺伝子クラスターの上流で、前記配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または
ii)前記異種ポリヌクレオチドは、前記S100A3/A4/A5/A6の主遺伝子クラスターの下流で、前記配列番号2のヌクレオチド1〜15,120の配列に対応するゲノム標的領域に組み込まれ、および
b)工程aa)の前記第1の異種ポリヌクレオチドを含む前記発現カセットに代えて、前記CHO細胞内に第2の異種ポリヌクレオチドを含む発現カセットを導入する工程を含む、項目14に記載の方法。
28.前記CHO細胞は、CHO-DG44細胞、CHO-K1細胞、CHO-DXB11細胞、CHO-S細胞、CHOグルタミン合成酵素(GS)欠損細胞、またはこれら細胞のいずれかの派生物である、項目14〜27のいずれか1項に記載の方法。
29.CHO細胞中に目的のタンパク質を産生する方法であって、
a)請求項1〜13のいずれか1項に記載の前記CHO細胞を提供すること、
b)工程a)の前記CHO細胞を、前記目的のタンパク質の産生を可能にする条件で細胞培養培地中で培養すること、
c)前記目的のタンパク質を回収すること、および
d)任意に前記目的のタンパク質を精製することを含む、方法。
30.目的のタンパク質を高収率で生産するための項目1〜13のいずれか1項の前記CHO細胞の使用。
配列表
配列番号1_上流の組込み部位
配列番号2_下流の組込み部位
配列番号3_上流の副クラスター
配列番号4_主クラスターコード領域
配列番号5_ZFN7の認識部位
配列番号6_ZFN8の認識部位
配列番号7_ZFN9の認識部位
配列番号8_ZFN10の認識部位
配列番号9_ZFN11の認識部位
配列番号10_ZFN12の認識部位
配列番号11_ZFN13の認識部位
配列番号12_ZFN14の認識部位
配列番号13_上流の相同性アーム着地パッド
配列番号14_下流の相同性アーム着地パッド
Claims (16)
- チャイニーズハムスター卵巣(CHO)細胞ゲノムのS100A遺伝子クラスター内に安定的に組込まれた少なくとも1つの異種ポリヌクレオチドを含むCHO細胞であって、
a)前記少なくとも1つの異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの上流で、配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または
b)前記少なくとも1つの異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの下流で、配列番号2のヌクレオチド1〜15、120の配列に対応するゲノム標的領域内に組込まれる、CHO細胞。 - a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド30〜19,000、配列番号1のヌクレオチド2,940〜19,000、配列番号1のヌクレオチド4,740〜19,000、配列番号1のヌクレオチド6,480〜19,000、配列番号1のヌクレオチド8,280〜19,000、配列番号1のヌクレオチド10,020〜19,000、または配列番号1のヌクレオチド11,820〜19,000に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド1〜13、160、配列番号2のヌクレオチド1〜12,000、または配列番号2のヌクレオチド1〜10、260に対応する、請求項1に記載のCHO細胞。 - 前記少なくとも1つの異種ポリヌクレオチドは、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれる、請求項1または2に記載のCHO細胞。
- 前記少なくとも1つの異種ポリヌクレオチドは、レポーター遺伝子および選択マーカー遺伝子からなる群より選択されるマーカー遺伝子であり、好ましくは、前記マーカー遺伝子は、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれ、前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、請求項3に記載のCHO細胞。
- 前記少なくとも1つの異種ポリヌクレオチドは、前記CHO細胞ゲノムの前記S100A遺伝子クラスターの一方または両方の対立遺伝子内に安定的に組込まれる、請求項1〜4のいずれか1項に記載のCHO細胞。
- CHO細胞を産生する方法であって、
a)CHO細胞を提供する工程、および
b)異種ポリヌクレオチドを前記CHO細胞内に導入する工程を含み、前記異種ポリヌクレオチドは、前記CHO細胞ゲノムのS100A遺伝子クラスター内に安定的に組込まれ、
i)前記異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの上流で、配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または、
ii)前記異種ポリヌクレオチドは、S100A3/A4/A5/A6の主遺伝子クラスターの下流で、配列番号2のヌクレオチド1〜15,120の配列に対応するゲノム標的領域内に組込まれる、方法。 - a)前記上流のゲノム標的領域は、配列番号1のヌクレオチド30〜19,000、配列番号1のヌクレオチド2,940〜19,000、配列番号1のヌクレオチド4,740〜19,000、配列番号1のヌクレオチド6,480〜19,000、配列番号1のヌクレオチド8,280〜19,000、配列番号1のヌクレオチド10,020〜19,000、または配列番号1のヌクレオチド11,820〜19,000に対応し、および/または
b)前記下流のゲノム標的領域は、配列番号2のヌクレオチド1〜13,160、配列番号2のヌクレオチド1〜12,000、または配列番号2のヌクレオチド1〜10,260に対応する、請求項6に記載の方法。 - 前記少なくとも1つの異種ポリヌクレオチドは、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれ、好ましくは前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、請求項6または7に記載の方法。
- 前記少なくとも1つの異種ポリヌクレオチドは、レポーター遺伝子および選択マーカー遺伝子からなる群より選択されるマーカー遺伝子であり、好ましくは前記マーカー遺伝子は、発現カセットの一部分として前記CHO細胞ゲノム内に安定的に組込まれ、前記発現カセットは、部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接している、請求項6〜8のいずれか1項に記載の方法。
- 前記異種ポリヌクレオチドは、
a)好ましくは、ジンクフィンガー核酸分解酵素(ZFN)、メガ核酸分解酵素、転写活性化因子様エフェクター核酸分解酵素(TALEN)、およびCRISPR関連核酸分解酵素からなる群より選択される配列特異的DNA編集酵素、または
b)好ましくは、λインテグラーゼ、φC31インテグラーゼ、Cre、Dre、およびFlpからなる群より選択される部位特異的組換え酵素を使用して、
前記CHO細胞ゲノム内に導入される、請求項6〜9のいずれか1項に記載の方法。 - 前記少なくとも1つの異種ポリヌクレオチドは、RNAおよび/またはタンパク質をコードする、請求項1〜3のいずれか1項に記載のCHO細胞、または請求項6〜8のいずれか1項に記載の方法。
- a)前記RNAは、mRNA、miRNA、またはshRNAであり、および/または
b)前記少なくとも1つの異種ポリヌクレオチドは、治療用タンパク質、好ましくは抗体、融合タンパク質、サイトカイン、および成長因子からなる群より選択される治療用タンパク質をコードする、請求項11に記載のCHO細胞または方法。 - 前記CHO細胞は、CHO-DG44細胞、CHO-K1細胞、CHO-DXB11細胞、CHO−S細胞、CHOグルタミン合成酵素(GS)欠損細胞、またはこれら細胞のいずれかの派生物である、請求項1〜5のいずれか1項に記載のCHO細胞、または請求項6〜10のいずれか1項に記載の方法。
- a)CHO細胞を提供する工程、および
aa)第1の異種ポリヌクレオチドを前記CHO細胞内に導入する工程を含み、前記第1の異種ポリヌクレオチドは、マーカー遺伝子であり、かつ部位特異的組換え酵素または配列特異的DNA編集酵素の認識部位に隣接する発現カセットの一部分として、前記CHO細胞ゲノムの前記S100A遺伝子クラスター内に安定的に組込まれ、
i)前記異種ポリヌクレオチドは、前記S100A3/A4/A5/A6の主遺伝子クラスターの上流で、前記配列番号1の配列に対応するゲノム標的領域内に組込まれ、および/または
ii)前記異種ポリヌクレオチドは、前記S100A3/A4/A5/A6の主遺伝子クラスターの下流で、前記配列番号2のヌクレオチド1〜15,120の配列に対応するゲノム標的領域内に組込まれ、および
b)工程aa)の前記第1の異種ポリヌクレオチドを含む前記発現カセットに代えて、第2の異種ポリヌクレオチドを含む発現カセットを前記CHO細胞内に導入する工程を含む、請求項6に記載の方法。 - CHO細胞内に目的のタンパク質を産生する方法であって、
a)請求項1〜5のいずれか1項に記載のCHO細胞を提供すること、
b)工程a)の前記CHO細胞を、前記目的のタンパク質の産生を可能にする条件で細胞培養培地内で培養すること、
c)前記目的のタンパク質を回収すること、および
d)任意に前記目的のタンパク質を精製すること、を含む方法。 - 目的のタンパク質を高収率で産生するための請求項1〜5のいずれか1項に記載の前記CHO細胞の使用。
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