JP7724573B2 - 胆管細胞癌を効果的に殺傷するCAR-iNKT細胞技術 - Google Patents
胆管細胞癌を効果的に殺傷するCAR-iNKT細胞技術Info
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Description
本願は、2023年1月20日に中国特許庁に提出された、出願番号202310087774.1、発明名称が「胆管細胞癌を効果的に殺傷するCAR-iNKT細胞技術」である中国特許出願の優先権を主張しており、その全ての内容は引用によって本明細書に組み込まれている。
本願は、癌免疫療法の分野に属する。具体的には、本願は、MSLNを含むキメラ抗原受容体、該キメラ抗原受容体が形質導入されたiNKT細胞、及び肝癌、特に胆管細胞癌の作製におけるそれらの使用を提供する。
の細胞を特異的に殺傷できるようにし、また、異なるscFvで構成されたCAR分子を比較して、癌細胞の表面のMSLN抗原と結合し、癌細胞を殺傷するのに有利なCAR分子を選別した。具体的には、下記通りである。
HEK-293T細胞を継代し、細胞が60%~70%コンフルエンスまで増殖した後、CAR分子を含む発現ベクターをパッケージングプラスミドと共にpEI試薬を用いてHEK-293T細胞にトランスフェクションし、トランスフェクション4時間後に新鮮な培地を交換した。トランスフェクション48~72時間後に、細胞培養上清を採取した。上清を超遠心分離することにより、パッケージング後にCAR分子を含むレンチウイルスを濃縮した。濃縮後のレンタウイルスについてウイルスの力価を測定し、使用時まで-80℃で凍結保存した。
anti-iNKT mircrobeadsでヒト末梢血単核細胞からiNKT細胞を分離した後、24ウェルプレートに1ウェル当たり2x105細胞を接種し、1ウェル当たりX-VIVO完全培地(100IU/ml及び100ng/ml a-Galcerを含む)を加えて48時間培養した後、各ウェルから細胞を収集し、400xgで5分間遠心分離し、上清を捨てた後、新鮮なX-VIVO完全培地を加えて再懸濁させた後、24ウェルプレートに再接種し、各ウェルあたり細胞にanti-MSLN1 CAR、anti-MSLN2 CAR、anti-MSLN3 CARを含む異なるレンチウイルスをそれぞれ加えて感染させた。24時間後、各ウェルの細胞を遠心分離管に収集し、400xgで5分間遠心分離した後、カウントし、5×105cells/mlで新鮮なX-VIVO完全培地を加えて培養し、48時間ごとに液を交換した。それぞれday7、day14、day21まで培養すると、サンプリングして、それぞれカウント及びフローサイトメトリー検出を行い、それによってキメラ抗原受容体分子の発現を明らかにした。
各群のCAR-iNKT細胞を21日目まで培養したときに、エフェクター細胞とターゲット細胞の比がそれぞれ1:3、1:1、3:1で、各群から0.33×105 CAR-iNKT細胞、1×105 CAR-iNKT細胞、3×105CAR-iNKT細胞、1×105KMCH細胞(KMCHは、Mesothelin発現陽性の胆管癌細胞系である。蛍光染料CFSEと均一に混合して10分間培養)をそれぞれ用いて6時間共培養した後、各群の培養上清を取り、マイクロプレートリーダーで上清中の蛍光強度(CAR-iNKT細胞の殺傷能力が強いほど、KMCH細胞内から放出されたCFSEが多く、蛍光強度が大きい)を検出し、各群のCAR-iNKT細胞の殺傷効率を計算した(図7)。その結果、3種類のanti-MSLN CAR-iNKT細胞はすべてKMCH細胞を有効に殺傷できるが、anti-MSLN1 CAR-iNKT細胞の殺傷能力が最も強いことが分かった。
各群のCAR-iNKT細胞を21日目まで培養した後、エフェクター細胞とターゲット細胞の比が3:1となるように、各群のCAR-iNKT細胞(群ごとに3×105 CAR-iNKT細胞)をそれぞれ1×105 KMHC細胞とともに0.5ml X-VIVO(IL-2及びa-GalCerを含まない)で24時間共培養後、細胞を収集し、400xgで5分間遠心分離して上清を採取し、ELISA法により上清中のIFN-γ及びIL-2の含有量を検出した。その結果、anti-MSLN1 CAR-iNKT細胞は、IFN-γ及びIL-2を分泌する能力が最も強く、これは、anti-MSLN1 CAR-iNKT細胞の強い増殖能力や腫瘍に対する殺傷能力と一致した(図8~9)。
Claims (11)
- 順次連結されている、MSLN一本鎖抗体、スペーサードメイン又はヒンジ領域、膜貫通領域、細胞内共刺激ドメイン、シグナル領域を含むことを特徴とするキメラ抗原受容体であって、前記キメラ抗原受容体は、SEQ ID NO.18、SEQ ID NO.20、およびSEQ ID NO.22からなる群より選択される1つのアミノ酸配列を有する、キメラ抗原受容体。
- 前記キメラ抗原受容体が、SEQ ID NO.19、SEQ ID NO.21およびSEQ ID NO.23からなる群より選択される1つのヌクレオチド配列を有する核酸によってコードされる、請求項1に記載のキメラ抗原受容体。
- 請求項1に記載のキメラ抗原受容体をコードする核酸であって、
前記核酸のヌクレオチド配列が、SEQ ID NO.19、SEQ ID NO. 21、又はSEQ ID NO.23から選択される、核酸。 - 請求項3に記載の核酸を担持するベクター。
- 前記ベクターはpLV300であり、そのヌクレオチド配列がSEQ ID NO.24である、請求項4に記載のベクター。
- 請求項1に記載のキメラ抗原受容体を形質導入した免疫細胞。
- 前記免疫細胞は、T細胞、NK細胞又はiNKT細胞である、請求項6に記載の免疫細胞。
- 前記免疫細胞はiNKT細胞である、請求項6に記載の免疫細胞。
- 癌治療薬の製造における請求項1に記載のキメラ抗原受容体の使用であって、前記癌は胆管細胞癌である、使用。
- 癌治療薬の製造における請求項4に記載のベクターの使用であって、前記癌は胆管細胞癌である、使用。
- 癌治療薬の製造における請求項6に記載の免疫細胞の使用であって、前記癌は胆管細胞癌である、使用。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310087774.1A CN116003638B (zh) | 2023-01-20 | 2023-01-20 | 一种有效杀伤胆管型肝癌的CAR-iNKT细胞技术 |
| CN202310087774.1 | 2023-01-20 | ||
| PCT/CN2023/081894 WO2024152435A1 (zh) | 2023-01-20 | 2023-03-16 | 一种有效杀伤胆管型肝癌的CAR-iNKT细胞技术 |
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| JP2025505477A JP2025505477A (ja) | 2025-02-28 |
| JP7724573B2 true JP7724573B2 (ja) | 2025-08-18 |
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| JP (1) | JP7724573B2 (ja) |
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| JP2021129592A (ja) | 2014-06-06 | 2021-09-09 | メモリアル スローン ケタリング キャンサー センター | メソセリン標的化キメラ抗原受容体およびその使用 |
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| WO2014052064A1 (en) * | 2012-09-27 | 2014-04-03 | The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | Mesothelin antibodies and methods for eliciting potent antitumor activity |
| KR20180055824A (ko) * | 2015-08-21 | 2018-05-25 | 카르스젠 테라퓨틱스 리미티드 | 항 메소텔린 완전 인간 항체 및 메소텔린을 타겟팅하는 면역효과 세포 |
| CN111683962B (zh) * | 2017-11-10 | 2025-05-16 | 美国政府(由卫生和人类服务部的部长所代表) | 靶向肿瘤抗原的嵌合抗原受体 |
| GB201721833D0 (en) * | 2017-12-22 | 2018-02-07 | Cancer Research Tech Ltd | Fusion proteins |
| CN109608549B (zh) * | 2017-12-29 | 2022-02-18 | 郑州大学第一附属医院 | 基于人源间皮素抗体的嵌合抗原受体、慢病毒表达载体及其应用 |
| KR102216225B1 (ko) * | 2019-06-27 | 2021-02-17 | (주)녹십자셀 | 메소텔린 특이적인 키메라 항원 수용체 및 이를 발현하는 t 세포 |
| CN113493772B (zh) * | 2020-04-08 | 2022-10-18 | 华中农业大学 | 可分泌性表达免疫毒素的嵌合抗原受体修饰的免疫细胞 |
| CN111560072B (zh) * | 2020-07-16 | 2020-12-11 | 上海恒润达生生物科技有限公司 | 抗人msln抗体以及靶向msln的免疫效应细胞 |
| US20250269026A1 (en) * | 2020-10-15 | 2025-08-28 | Chengdu Kelun Precision Biotechnology Co., Ltd. | Chimeric antigen receptor which specifically binds to msln, and application thereof |
| CN113527515A (zh) * | 2021-07-14 | 2021-10-22 | 南京蓝盾生物科技有限公司 | 一种靶向mesothelin的嵌合抗原受体及其应用 |
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| JP2021129592A (ja) | 2014-06-06 | 2021-09-09 | メモリアル スローン ケタリング キャンサー センター | メソセリン標的化キメラ抗原受容体およびその使用 |
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| JP2025505477A (ja) | 2025-02-28 |
| CN116003638B (zh) | 2023-09-05 |
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| WO2024152435A1 (zh) | 2024-07-25 |
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| WO2024152435A9 (zh) | 2025-01-02 |
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