红云青霄(北京)科技以及红云晴霄(启东)生物科技作为技术研发单位,对于创新技术的研发和知识产权的保护十分重视
目前申请发明专利6项,国际专利2项,申请海外数十个国家和地区的发明专利,储备发明专利6项,申请实用新型专利4项,持有REPERE技术原理著作权1项
目前所独家持有的底层基因编辑技术REPERE®技术,对标国外最先进的底层基因编辑技术如CRISPR技术、Prime Editing技术或Gene Writing技术,并较其他技术具有明显优势
REPERE®基因编辑技术以及Copifinite®基因编辑辅助技术使用人体内唯一的内切酶和逆转录酶ORF2p,并均已申请发明专利,技术壁垒高
目前独家持有的REPERE®基因编辑技术已在中国、美国、欧洲、日本、韩国、加拿大、澳大利亚、巴西、印度、墨西哥、南非、柬埔寨等国申请发明专利
创新性基因编辑技术—锐湃尔®
(REPERE)®
锐湃尔®基因编辑技术应用人类基因组中的逆转座子(Alu元件及LINE-1转座子)、人源核酸内切酶以及逆转录酶ORF2p,整个技术完全为人源,因此具有低免疫原性的特点。
锐湃尔基®因编辑技术首先转录出含有靶位点上下游序列及待插入序列并连接经改造的逆转座子序列的RNA,该RNA结合人源ORF2p后识别基因组上特定位点(“TTAAAA”)、切开基因组单链并以此为引物将RNA逆转录为单链DNA。
此后,所产生的单链DNA基于序列特异性互补结合于基因组上靶位点处,结合于单链DNA的3′端上的ORF2p可识别基因组上靶位点上游的长序列,当且仅当所产生单链DNA的靶位点上游序列与基因组上的靶位点上游序列完全匹配时,根据ORF2p本身聚合酶的作用性质,方可使ORF2p顺利滑动至基因组上的靶位点处,剪切基因组靶位点的DNA单链,并以此为引物将此前产生的单链DNA转化为双链DNA。
结合于所产生双链DNA的ORF2p在细胞分裂期再次依上述机制切开基因组靶位点单链的同时,切开所产生双链DNA的相应单链的相应位置,促进分裂期同源重组的发生,最终经效率提高的同源重组将待插入序列插入至基因组上的靶位点处。
锐湃尔®基因编辑技术由于仅在基因组靶位点处形成双链DNA、识别序列长以及完全为人源等特点,使得其具有高靶向性、低脱靶率及极低免疫原性等优势,并可以较高效率向基因组插入长片段序列。同时,该技术所采用的人源核酸内切酶ORF2p仅切开基因组单链,此后通过效率提高的同源重组进行序列插入,极大的避免了使基因组发生双链断裂的风险,因此具有较高的安全性。
锐湃尔®技术基因编辑过程简述
含有待插入序列、靶位点上游序列及靶位点下游序列信息的RNA被由与其相连的重复元件及其所形成的特定二级结构所招募的内切酶及逆转录酶ORF2p逆转录转化为ssDNA。此后该含有待插入序列、靶位点上游序列及靶位点下游序列信息的ssDNA以序列特异性结合于基因组上靶位点处,连于ssDNA的3’端的ORF2p在ssDNA上靶位点上游序列与基因组上靶位点上游序列准确匹配后方可滑动至靶位点(该机制使得锐湃尔™技术具有高靶向性的特点),在ssDNA在基因组靶位点处形成特定“Ω”二级结构的条件下,ORF2p切开基因组靶位点并以基因组单链为引物合成ssDNA的另一条链,转变为dsDNA。正因仅在基因组靶位点处方可形成具有同源重组潜能的dsDNA,且不产生双链断裂,锐湃尔™技术才更为安全。此后在ORF2p的辅助下,dsDNA上的待插入序列可于细胞分裂时借助同源重组被插入至靶位点中,进而达到基因编辑的目的。锐湃尔®技术所用序列和蛋白均取自人体,为完全人源的基因编辑技术,无需担心免疫反应;且锐湃尔®技术基于人体固有的基因变化机制“CNV延伸机制”,安全性更有保障。
锐湃尔™技术申请发明专利
锐湃尔™技术的基本理论“CNV延伸机制”发表于“frontiers in Cell and Developmental Biology”(目前IF:6.684)
CNV延伸理论合理的解释了基因组上广泛存在的内含子、短散在核元件和长散在核元件的存在意义;
同时对基因组上一系列机制尚不明朗的变化现象如胚胎和肿瘤中与相应基因表达相关的拷贝数变化、亨廷顿舞蹈症及脆性X综合症中与相应基因表达相关的三联核苷酸重复增加及仅在具有增殖潜能的免疫细胞中出现的不完整HIV基因组对高表达基因中Alu序列的偏好性插入等提出了更为合理的解释
锐湃尔™技术申请PCT(国际专利申请)
锐湃尔™技术的体外转录(IVT)RNA、RNP形式申请发明专利
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