Bharali等人展示了硅納米材料在生物學(xué)中的新應(yīng)用:將具有攜帶DNA分子能力的納米顆粒帶上編碼增強(qiáng)型綠色熒光蛋白(Enhanced-green Fluorescent Protein,EGFP)或是核定位成纖維細(xì)胞生長(zhǎng)因子受體Ⅰ型(nucleus-targeting fibroblast growth factor receptor type 1;FGFR1)的基因,并用它轉(zhuǎn)染神經(jīng)元細(xì)胞。轉(zhuǎn)染了FGFR1的細(xì)胞會(huì)減少溴脫氧尿苷(bromodeoxyuridine)在DNA中的插入量。實(shí)驗(yàn)發(fā)現(xiàn)溴脫氧尿苷插入量減少的細(xì)胞發(fā)生在室下區(qū)(subventricular zone,SVZ)和吻側(cè)漂移線(rostral migratory stream,RMS)。這就表明轉(zhuǎn)染控制的增殖主要發(fā)生在這些區(qū)域。腦中轉(zhuǎn)基因的載體較為常用的是病毒載體,從該實(shí)驗(yàn)可以看出,這種類型的納米顆?梢詾檗D(zhuǎn)基因提供備選方案。
(Fig: ORMOSIL nanoparticle transfection in the SNc.)
參考英文文獻(xiàn):Organically modified silica nanoparticles: a nonviral vector for in vivo gene delivery and expression in the brain.
Bharali, D. J. et al. Proc. Natl Acad Sci. USA 102, 11539–11544 (2005)