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转基因婴儿或进入“精密制造”阶段(组图)

来源: 南方日报网络版     时间: 2019年07月23日 06:55:42
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(  英)(国)(生)(育)(监)(管)(部)(门)(宣)(布)(,批)(准)(科)(学)(家)(通)(过)(编)(辑)(来)(修)(改)(人)(类)(胚)(胎)(基)(因)(,创)(造)(了)(人)(类)(历)(史)(。英)(国)(也)(成)(为)(史)(上)(首)(个)(对)(基)(因)(编)(辑)(持)(全)(面)(开)(放)(态)(度)(的)(国)(家)(。也)(就)(是)(说)(,未)(来)(科)(学)(家)(们)(能)(够)(通)(过)(胚)(胎)(DNA重)(组)(技)(术)(造)(出)(理)(想)(中)(的)(婴)(儿)(。  英)(国)(伦)(敦)(的)(弗)(朗)(西)(斯)(·克)(里)(克)(研)(究)(所)(将)(主)(导)(这)(项)(试)(验)(,并)(将)(提)(供)(人)(们)(对)(生)(命)(最)(初)(期)(人)(类)(活)(动)(的)(深)(入)(研)(究)(和)(认)(识)(。  胚)(胎)(演)(变)(过)(程)(:受)(精)(卵)(胚)(囊)(胚)(胎)(  但)(是)(目)(前)(这)(项)(政)(策)(还)(仅)(适)(用)(于)(研)(究)(,实)(际)(在)(胚)(胎)(中)(做)(植)(入)(或)(者)(修)(改)(胚)(胎)(都)(将)(被)(视)(作)(犯)(法)(行)(为)(。尽)(管)(处)(于)(研)(究)(阶)(段)(,但)(该)(试)(验)(仍)(然)(激)(起)(了)(伦)(理)(方)(面)(的)(争)(议)(,一)(些)(人)(担)(忧)(此)(项)(研)(究)(将)(为)(设)(计)(转)(基)(因)(婴)(儿)(敞)(开)(大)(门)(。前)(巴)(斯)(德)(研)(究)(所)(上)(海)(分)(院)(研)(究)(员)(AndyTsun告)(诉)(《第)(一)(财)(经)(日)(报)(》记)(者)(:这)(或)(许)(是)(一)(个)(危)(险)(的)(措)(施)(,一)(切)(都)(取)(决)(于)(科)(学)(家)(和)(研)(究)(人)(员)(的)(正)(义)(感)(。  DNA是)(生)(命)(基)(因)(的)(蓝)(本)(,决)(定)(了)(我)(们)(身)(体)(各)(部)(分)(的)(组)(成)(。编)(辑)(修)(改)(基)(因)(就)(意)(味)(着)(可)(以)(更)(加)(精)(确)(地)(对)(DNA进)(行)(人)(工)(操)(纵)(。不)(过)(BBC报)(道)(称)(,去)(年)(中)(国)(在)(基)(因)(编)(辑)(方)(面)(也)(创)(造)(了)(全)(球)(第)(一)(,中)(国)(科)(学)(家)(去)(年)(首)(次)(宣)(布)(已)(在)(进)(行)(通)(过)(基)(因)(编)(辑)(人)(类)(胚)(胎)(来)(治)(愈)(白)(血)(病)(的)(试)(验)(。  BBC援)(引)(弗)(朗)(西)(斯)(·克)(里)(克)(研)(究)(所)(的)(高)(级)(负)(责)(人)(RobinLovell-Badge教)(授)(言)(论)(称)(,中)(国)(有)(监)(管)(法)(规)(,但)(通)(常)(的)(情)(况)(是)(,只)(有)(你)(越)(过)(模)(糊)(边)(界)(的)(那)(一)(刻)(,才)(会)(发)(现)(这)(些)(法)(规)(其)(实)(并)(不)(清)(晰)(。针)(对)(英)(国)(科)(学)(家)(获)(准)(基)(因)(编)(辑)(事)(件)(,Lovell-Badge表)(示)(:这)(是)(历)(史)(上)(第)(一)(次)(正)(式)(通)(过)(监)(管)(体)(系)(批)(准)(的)(案)(例)(。  试)(验)(是)(在)(受)(精)(后)(头)(7天)(的)(受)(精)(卵)(上)(实)(施)(的)(。在)(此)(期)(间)(,受)(精)(卵)(将)(转)(化)(成)(胚)(囊)(,胚)(囊)(中)(含)(有)(200至)(300个)(细)(胞)(。KathyNiakan博)(士)(  科)(研)(人)(员)(将)(会)(对)(捐)(献)(的)(胚)(胎)(做)(基)(因)(编)(辑)(,并)(在)(7天)(后)(销)(毁)(。据)(悉)(,该)(试)(验)(将)(在)(未)(来)(几)(个)(月)(开)(始)(实)(施)(。  这)(项)(工)(作)(由)(弗)(朗)(西)(斯)(·克)(里)(克)(研)(究)(所)(KathyNiakan博)(士)(主)(持)(,她)(在)(人)(类)(生)(命)(活)(动)(发)(展)(领)(域)(已)(有)(超)(过)(10年)(的)(研)(究)(经)(验)(。据)(BBC报)(道)(,今)(年)(初)(,Niakan博)(士)(曾)(解)(释)(她)(申)(请)(编)(辑)(胚)(胎)(工)(程)(的)(目)(的)(,因)(为)(我)(们)(真)(的)(渴)(望)(了)(解)(基)(因)(在)(从)(胚)(胎)(发)(展)(成)(为)(健)(康)(人)(体)(过)(程)(中)(的)(作)(用)(。KathyNiakan博)(士)(表)(示)(,为)(什)(么)(了)(解)(基)(因)(那)(么)(重)(要)(?因)(为)(流)(产)(以)(及)(不)(孕)(的)(现)(象)(在)(当)(下)(非)(常)(普)(遍)(,但)(是)(我)(们)(对)(此)(又)(知)(之)(甚)(少)(。  每)(100个)(受)(精)(卵)(中)(,只)(有)(不)(到)(一)(半)(能)(够)(发)(展)(到)(胚)(囊)(阶)(段)(,只)(有)(25个)(能)(植)(入)(子)(宫)(,其)(中)(又)(只)(有)(13个)(能)(发)(展)(超)(过)(3个)(月)(。  在)(胚)(囊)(阶)(段)(,一)(些)(细)(胞)(扮)(演)(着)(特)(殊)(的)(角)(色)(,其)(中)(有)(些)(变)(成)(了)(胎)(盘)(,有)(些)(变)(成)(了)(卵)(黄)(囊)(,还)(有)(些)(变)(成)(了)(我)(们)(自)(己)(。但)(是)(对)(于)(这)(些)(过)(程)(是)(如)(何)(进)(行)(的)(,又)(为)(什)(么)(会)(这)(样)(发)(展)(,都)(是)(未)(知)(,可)(知)(的)(是)(一)(些)(DNA在)(此)(阶)(段)(中)(确)(实)(极)(其)(活)(跃)(。  Niakan博)(士)(开)(始)(此)(项)(研)(究)(的)(初)(衷)(,是)(认)(为)(这)(些)(基)(因)(可)(能)(决)(定)(了)(人)(类)(的)(发)(展)(,但)(是)(它)(们)(在)(做)(什)(么)(,又)(怎)(么)(会)(发)(生)(变)(异)(和)(错)(位)(的)(,科)(学)(家)(暂)(时)(不)(得)(而)(知)(。  弗)(朗)(西)(斯)(·克)(里)(克)(研)(究)(所)(主)(任)(PaulNurse对)(Niakan的)(研)(究)(项)(目)(获)(批)(表)(示)(欣)(慰)(。目)(前)(大)(多)(数)(科)(研)(人)(员)(认)(为)(,通)(过)(对)(人)(类)(生)(命)(最)(初)(期)(细)(胞)(活)(动)(的)(观)(察)(,能)(够)(帮)(助)(人)(类)(了)(解)(健)(康)(的)(胚)(胎)(是)(如)(何)(形)(成)(的)(,并)(加)(固)(人)(们)(对)(试)(管)(婴)(儿)(成)(功)(率)(的)(认)(识)(。  人)(类)(基)(因)(警)(报)(组)(织)(主)(任)(DavidKing博)(士)(对)(BBC表)(示)(,这)(项)(研)(究)(将)(让)(转)(基)(因)(婴)(儿)(制)(造)(技)(术)(更)(加)(精)(密)(,完)(善)(消)(费)(优)(生)(学)(。很)(多)(政)(府)(的)(科)(学)(研)(究)(顾)(问)(已)(经)(决)(定)(对)(此)(投)(赞)(成)(票)(。  AndyTsun对)(《第)(一)(财)(经)(日)(报)(》记)(者)(表)(示)(,尽)(管)(在)(胚)(胎)(上)(运)(用)(基)(因)(编)(辑)(技)(术)(会)(触)(发)(道)(德)(伦)(理)(方)(面)(的)(问)(题)(,但)(在)(宣)(布)(通)(过)(政)(策)(前)(,政)(府)(有)(关)(方)(面)(肯)(定)(已)(对)(此)(作)(出)(全)(面)(评)(估)(。因)(此)(,有)(理)(由)(相)(信)(在)(推)(动)(科)(学)(进)(步)(的)(同)(时)(,该)(政)(策)(也)(能)(符)(合)(社)(会)(利)(益)(。
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