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首页> 外文期刊>Biomaterials >Engineered antibody-functionalized porous silicon nanoparticles for therapeutic targeting of pro-survival pathway in endogenous neuroblasts after stroke
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Engineered antibody-functionalized porous silicon nanoparticles for therapeutic targeting of pro-survival pathway in endogenous neuroblasts after stroke

机译:工程化抗体官能化多孔硅纳米颗粒用于治疗脑卒中后内源神经细胞中的促生存途径的治疗靶向

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Generation of new neurons by utilizing the regenerative potential of adult neural stem cells (NSCs) and neuroblasts is an emerging therapeutic strategy to treat various neurodegenerative diseases, including neuronal loss after stroke. Committed to neuronal lineages, neuroblasts are differentiated from NSCs and have a lower proliferation rate. In stroke the proliferation of the neuroblasts in the neurogenic areas is increased, but the limiting factor for regeneration is the poor survival of migrating neuroblasts. Survival of neuroblasts can be promoted by small molecules; however, new drug delivery methods are needed to specifically target these cells. Herein, to achieve specific targeting, we have engineered biofunctionalized porous silicon nanoparticles (PSi NPs) conjugated with a specific antibody against polysialylated neural cell adhesion molecule (PSA-NCAM). The PSi NPs loaded with a small molecule drug, SC-79, were able to increase the activity of the Akt signaling pathway in doublecortin positive neuroblasts both in cultured cells and in vivo in the rat brain. This study opens up new possibilities to target drug effects to migrating neuroblasts and facilitate differentiation, maturation and survival of developing neurons. The conjugated PSi NPs are a novel tool for future studies to develop new therapeutic strategies aiming at regenerating functional neurocircuitry after stoke.
机译:通过利用成年神经干细胞(NSCs)和神经细胞的再生潜力来产生新的神经元是一种新兴治疗策略,以治疗各种神经变性疾病,包括中风后神经元损失。致力于神经细胞谱系,神经细胞与NSC分化并具有较低的增殖速率。在中风中,神经细胞中神经细胞的增殖增加,但再生的限制因素是迁移神经细胞的差。神经细胞的存活可以通过小分子促进;然而,需要新的药物递送方法特异性靶向这些细胞。在此,为了达到特定的靶向,我们已经用针对多种多族神经细胞粘附分子(PSA-NCAM)的特异性抗体缀合的生物官能化多孔硅纳米颗粒(PSI NP)。加载有小分子药物SC-79的PSI NPS能够增加双击素阳性神经细胞中Akt信号通路的活性,培养细胞和大鼠脑中的体内。本研究开辟了对迁移神经细胞来迁移药物影响的新可能性,促进发育神经元的分化,成熟和存活。共轭的PSI NPS是一种新型工具,用于开发旨在在叉浴后再生功能性神经皮序的新治疗策略。

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