纳米级颗粒(NP)作为用于核酸递送的非病毒载体由于其穿透未磨损的细胞膜的能力而获得了越来越多的兴趣。先前进行的研究已经评估了纳米材料的微生物转化能力,但没有比较相对功效。本研究旨在确定化学合成/功能化的非金属氧化物中最熟练的纳米载体,金属/金属氧化物,和碳基(碳纳米管(CNT),氧化石墨烯(GO))纳米材料(NMs)用于两种革兰氏阴性菌的转化,即,大肠杆菌和根癌农杆菌。显微镜和光谱学研究有助于识别相互作用,粘附模式,转换效率,更好的交付,和通过使用NMs表达靶gfp基因。pgfp在所有NMs上的负载赋予了对DNAseI攻击的保护,除了通过壳聚糖获得最大的ZnONPs,层状双氢氧化物(LDH),和GONM-质粒DNA缀合物。CNTs和GO显着增强了细胞外和细胞内蛋白质含量,分别,在这两种细菌中。然而,GO和CNT以时间依赖性方式显著降低细胞活力,而AuNP表现出可忽略的细胞毒性。因此,这项研究确定了金属/金属氧化物的比较效率,非金属氧化物,和碳纳米材料,AuNPs是最生物安全的,而LDH和壳聚糖NPs是通过简单的孵育方法进行革兰氏阴性菌遗传转化的最熟练的替代工具。
Nano-scale particles (NPs) have gained increased interest as non-viral vectors for nucleic acid delivery due to their ability to penetrate through unabraded cell membranes. The previous studies performed have evaluated the nanomaterials for their microbial
transformation proficiency but have not compared the relative efficacy. The present study aims to identify the most proficient nano-delivery vehicle among the chemically synthesized/functionalized non-metal oxide, metal/metal oxide, and carbon-based (carbon nanotube (CNT), graphene oxide (GO)) nanomaterial(s) (NMs) for the
transformation of two gram-negative bacteria, i.e., Escherichia coli and Agrobacterium tumefaciens. The microscopy and spectroscopy studies helped to identify the interaction, adhesion patterns,
transformation efficiencies, better delivery, and expression of the target gfp gene by use of NMs. Loading of pgfp on all NMs imparted protection to DNAse I attack except ZnO NPs with maximum by chitosan, layered double hydroxide (LDH), and GO NM-plasmid DNA conjugates. The CNTs and GO significantly enhanced the extra- and intra-cellular protein content, respectively, in both bacteria. However, GO and CNT significantly decreased the cell viability in a time-dependent manner while AuNPs exhibited negligible cell toxicity. Therefore, this study identified the comparative efficiency of metal/metal oxide, non-metal oxide, and carbon nanomaterials with AuNPs as the most biosafe while LDH and chitosan NPs being the most proficient alternative tools for the genetic
transformation of gram-negative bacteria by simple incubation method.