2017年12月以來,國內(nèi)多家公司相繼提交CAR-T產(chǎn)品臨床試驗申請,3月1日,CDE更新一條受理消息,上海斯丹賽生物技術有限公司CAR-T產(chǎn)品ICT19G1臨床試驗申請獲得CFDA承辦受理,受理號CXSL1800020,這應該是國內(nèi)第10家。筆者在這里分享一些關于斯丹賽CAR-T產(chǎn)品開發(fā)的主要進展。
一. 斯丹賽:從"高大上"到"接地氣"
斯丹賽創(chuàng)始團隊具有很強的學術背景,這個公司成立早期以TALEN相關技術及技術產(chǎn)品立足并開拓市場,得益于團隊豐富的干細胞研發(fā)和基因編輯經(jīng)驗,公司早期客戶主要是高??蒲袌F隊。
從"高大上"到"接地氣",斯丹賽做了什么?團隊在CAR-T產(chǎn)品開發(fā)上面更具有技術優(yōu)勢,就像公司官網(wǎng)講到的,"人類胚胎干細胞和干細胞重編程技術是干細胞技術中最困難的,我們熟練掌握這兩個技術后攻克CAR-T技術,類似于"軍工"轉(zhuǎn)"民用",駕輕就熟。"
斯丹賽目前公布哪些臨床進展?
斯丹賽從"高大上"的干細胞研究轉(zhuǎn)到CAR-T產(chǎn)品開發(fā)后,取得較好臨床進展,部分數(shù)據(jù)公布如下:
1. 復發(fā)/難治性白血病41例多中心臨床試驗 34例完全緩解,33例MDR-
2. 3例人源CAR-T成人白血病治療,完全緩解
3. 1例睪丸復發(fā)急淋白血病青年患者,完全緩解(Yu J, Hu Y, Pu C, et al. Successful chimeric Ag receptor modified T cell therapy for isolated testicular relapse after hematopoietic cell transplantation in an acute lymphoblastic leukemia patient[J]. Bone marrow transplantation, 2017, 52(7): 1065.)
目前斯丹賽的研發(fā)管線:
血液瘤:進展順利 靶點CD19,CD20,CD22,BCMA
實體瘤:
干細胞產(chǎn)品/基因治療產(chǎn)品:
目前,斯丹賽CAR-T血液瘤產(chǎn)品無疑是開發(fā)最為順利的,其主要合作單位是浙江大學醫(yī)學院附屬第一醫(yī)院。
二. 斯丹賽專利分析
斯丹賽官網(wǎng)稱已申請了26項歐美專利和5項PCT專利,筆者通過專利檢索(可見附表),發(fā)現(xiàn)斯丹賽早期專利圍繞基因編輯技術,比較重要的關于CAR-T產(chǎn)品的有《Humanized anti-CD19 antibody and use thereof 》《Activation and expansion of T cells 》《Reducing immune tolerance induced by PD-L1》等。斯丹賽對CAR-T產(chǎn)品做了改進,有幾個點值得關注:
1. 減少PD-1/PD-L1所導致的免疫耐受 可見專利CN107073138 (A),專利對PD-1蛋白序列做了改造,從而減少PD-1/PD-L1所導致的免疫耐受;
2. 將抗CD19 抗體人源化 可見專利《Humanized anti-CD19 antibody and use thereof 》,這可能降低免疫原性,人源化CAR-T具有開發(fā)潛力。
3. CAR-T產(chǎn)品細胞內(nèi)共刺激因子為4-1BB,4-1BB和CD28安全之爭一直存在,但是數(shù)據(jù)看來,4-1BB在某些適應癥中確實具有更好的安全性。
三.最后談一談ICT19G1
斯丹賽雖然還未透漏關于ICT19G1的相關信息,但是筆者根據(jù)斯丹賽公布臨床數(shù)據(jù)及臨床試驗,推斷ICT19G1應該是一款靶向CD19CAR-T細胞產(chǎn)品。
目前,clinical trials有兩條斯丹賽信息,即NCT02813837(SCT019-01)和NCT03118180(CART19-001),可進入官網(wǎng)查看相關信息。
附表:斯丹賽專利一覽
USE OF CHIMERIC ANTIGEN RECEPTOR MODIFIED CELLS TO TREAT CANCER |
Publication info: |
Priority date: |
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US2017355776 (A1) |
01/04/2016 |
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14/12/2017 |
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Reducing immune tolerance induced by PD-L1 |
Publication info: |
Priority date: |
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AU2016228080 (A1) |
02/03/2015 |
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07/09/2017 |
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KR20170124576 (A) |
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10/11/2017 |
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Method for directional cloning |
Publication info: |
Priority date: |
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US2017218380 (A1) |
17/10/2014 |
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03/08/2017 |
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CN106795522 (A) |
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31/05/2017 |
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ACTIVATION AND EXPANSION OF T CELLS |
Publication info: |
Priority date: |
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WO2017059796 (A1) |
08/10/2015 |
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13/04/2017 |
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HUMANIZED ANTI-CD19 ANTIBODY AND USE THEREOF |
Publication info: |
Priority date: |
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WO2017015783 (A1) |
24/07/2015 |
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02/02/2017 |
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EP3149046 (A1) |
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05/04/2017 |
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EP3149046 (A4) |
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30/08/2017 |
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TRANSCRIPTION ACTIVATOR-LIKE EFFECTOR ASSEMBLY |
Publication info: |
Priority date: |
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EP3118319 (A1) |
12/09/2012 |
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18/01/2017 |
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EP2864483 (A1) |
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2015-04-29 |
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EP2864483 (A4) |
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2015-06-10 |
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EP2864483 (B1) |
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2017-02-15 |
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EP2864483 (B8) |
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26/04/2017 |
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Modified cells for production of blood cells |
Publication info: |
Priority date: |
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CN105518127 (A) |
06/09/2013 |
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20/04/2016 |
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Multi-module DNA (deoxyribonucleic acid) library and method for constructing transcription activator like effector nuclease plasmid |
Publication info: |
Priority date: |
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CN103695452 (A) |
09/12/2013 |
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2014-04-02 |
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CN103695452 (B) |
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11/01/2017 |
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Single-module DNA (deoxyribonucleic acid) library and connecting method for TALENs (transcription activator-like effector nucleases) identification modules |
Publication info: |
Priority date: |
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CN103497966 (A) |
27/09/2013 |
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2014-01-08 |
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CN103497966 (B) |
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10/02/2016 |
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A pair of transcription activator like effector nucleases of L3 and R1 and a coding gene and an application thereof |
Publication info: |
Priority date: |
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CN102850444 (A) |
21/07/2012 |
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2013-01-02 |
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CN102850444 (B) |
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18/02/2015 |
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Recombinant transcription activator like effector, transcription activator like effector nuclease, as well as coding gene and application thereof |
Publication info: |
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CN102702335 (A) |
23/05/2012 |
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2012-10-03 |
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CN102702335 (B) |
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09/07/2014 |
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One pair of transcription activator effect factor nucleases R1 and R2, coding gene and application thereof |
Publication info: |
Priority date: |
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CN102702332 (A) |
23/05/2012 |
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2012-10-03 |
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CN102702332 (B) |
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08/01/2014 |
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Pair of transcription activator-like effector nucleases (TALEN), encoding gene and application thereof |
Publication info: |
Priority date: |
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CN102702331 (A) |
23/05/2012 |
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2012-10-03 |
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CN102702331 (B) |
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06/08/2014 |
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參考:
http://www.sidansai.com
作者簡介:Dopine,注冊執(zhí)業(yè)藥師,河南省藥學會會員,就職于河南省某三級甲等醫(yī)院PIVAS,精于臨床藥學服務,專注臨床用藥安全和不合理用藥。對國內(nèi)外醫(yī)藥審評審批政策,研發(fā)動態(tài),新藥注冊審批等長期關注。
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