細(xi)(xi)胞(bao)基因(yin)治療是生物醫(yi)藥領域的前沿陣地(di),它通過(guo)對細(xi)(xi)胞(bao)或基因(yin)進(jin)行改造、修飾、調控,來(lai)糾正或補償(chang)因(yin)基因(yin)缺陷和異(yi)常引起的疾病,為傳(chuan)統療法難以攻克的疑難病癥,如遺(yi)傳(chuan)性(xing)(xing)疾病、某些癌癥、自(zi)身(shen)免疫(yi)性(xing)(xing)疾病等(deng),帶(dai)來(lai)了(le)新(xin)的治愈希望。
干細(xi)胞(bao)療(liao)法是細(xi)胞(bao)基因治(zhi)療(liao)的重要分(fen)支(zhi)。干細(xi)胞(bao)具備(bei)自我更(geng)新和多向分(fen)化潛能,能分(fen)化成多種功能細(xi)胞(bao),修(xiu)(xiu)復(fu)受(shou)損組(zu)織(zhi)和器官。間(jian)充質干細(xi)胞(bao)(MSC)是其中備(bei)受(shou)關注的類型,具有免疫調節、抗(kang)炎、促進組(zu)織(zhi)修(xiu)(xiu)復(fu)等特性(xing)。在(zai)臨床(chuang)應(ying)用(yong)中,MSC 已被嘗試用(yong)于治(zhi)療(liao)多種疾病(bing),如(ru)移植物抗(kang)宿(su)主病(bing)、骨(gu)關節炎、心肌梗(geng)死(si)等,通過調節免疫微環境、促進組(zu)織(zhi)再生(sheng)等機制發揮治(zhi)療(liao)作用(yong)。
誘導多能干(gan)細(xi)(xi)胞(bao)(iPSC)細(xi)(xi)胞(bao)療法(fa)是另一(yi)項(xiang)創新性(xing)突(tu)破。iPSC 由成體細(xi)(xi)胞(bao)經重(zhong)編程獲得,擁有類(lei)似(si)胚胎干(gan)細(xi)(xi)胞(bao)的多能性(xing)。它克服了胚胎干(gan)細(xi)(xi)胞(bao)來源的倫理問(wen)題,可(ke)根據患者自(zi)身細(xi)(xi)胞(bao)定制(zhi),降低免疫(yi)排(pai)斥(chi)風(feng)險。iPSC 能分化為(wei)各(ge)類(lei)細(xi)(xi)胞(bao),用于疾病(bing)建模(mo)、藥(yao)物(wu)篩選以及細(xi)(xi)胞(bao)移植(zhi)治(zhi)療,為(wei)帕金森(sen)病(bing)、糖尿病(bing)等疾病(bing)的治(zhi)療帶來新曙光。
基(ji)(ji)(ji)因(yin)(yin)遞(di)(di)(di)送(song)(song)(song)(song)技術則是細(xi)(xi)胞(bao)(bao)基(ji)(ji)(ji)因(yin)(yin)治療的(de)(de)關鍵支撐(cheng)。它負責將治療性基(ji)(ji)(ji)因(yin)(yin)安(an)全(quan)、效率高地遞(di)(di)(di)送(song)(song)(song)(song)至靶(ba)細(xi)(xi)胞(bao)(bao)。轉染試劑是基(ji)(ji)(ji)因(yin)(yin)遞(di)(di)(di)送(song)(song)(song)(song)常用(yong)工具之一,通(tong)過特定機制將外源基(ji)(ji)(ji)因(yin)(yin)導(dao)入(ru)細(xi)(xi)胞(bao)(bao)。基(ji)(ji)(ji)因(yin)(yin)遞(di)(di)(di)送(song)(song)(song)(song)技術面(mian)臨遞(di)(di)(di)送(song)(song)(song)(song)效率、靶(ba)向(xiang)性、安(an)全(quan)性等挑戰,理想的(de)(de)遞(di)(di)(di)送(song)(song)(song)(song)系統需準確地將基(ji)(ji)(ji)因(yin)(yin)遞(di)(di)(di)送(song)(song)(song)(song)至病(bing)變細(xi)(xi)胞(bao)(bao),避免脫靶(ba)效應(ying),同時不引發免疫反應(ying)和(he)毒性。病(bing)毒載(zai)(zai)體(如腺相(xiang)關病(bing)毒載(zai)(zai)體)和(he)非病(bing)毒載(zai)(zai)體(如脂(zhi)質納米顆粒)是目前主(zhu)流的(de)(de)基(ji)(ji)(ji)因(yin)(yin)遞(di)(di)(di)送(song)(song)(song)(song)載(zai)(zai)體,科研人員不斷優化載(zai)(zai)體設計,以提升(sheng)基(ji)(ji)(ji)因(yin)(yin)治療的(de)(de)有效性和(he)安(an)全(quan)性。
細胞基因治(zhi)療(liao)憑(ping)借干細胞療(liao)法、iPSC 細胞療(liao)法和基因遞送技術等不斷發展,有望為更多難(nan)治(zhi)性(xing)疾病提供治(zhi)愈方案,變革(ge)未來醫(yi)學(xue)格局。