title: A broad-range method to detect genomic DNA of multiple pathogenic bacteria based on the aggregation strategy of gold nanorods.
abstract: It remains challenging to detect unknown pathogenic bacteria in diagnostic, clinical and environmental fields. This work describes the approach to the development of a sensitive, broad-range genosensing assay targeting the conserved 16S rDNA region existing in most bacteria, by monitoring the aggregation level of gold nanorods (GNRs)-based nanoprobes through their localized surface plasmon resonance (LSPR) property. In the quantitative detection of artificial sequence, the limit of detection (LOD) of such a bioassay is demonstrated to reach the 5 pM level. This pair of universal GNRs-based nanoprobes can further identify at least 6 species of bacteria that were most prevalent in platelet concentrates (PCs) and have no cross-reaction with other pathogens. Moreover, it also exhibits higher sensitivity than other broad-range methods in analysing Serratia marcescens-spiked PCs. Therefore, the presented strategy not only provides a novel and effective DNA analysis method to detect multiple bacterial contaminations in PCs, but also opens up possibilities for its future use of detecting unknown bacteria in other systems, such as food and water, even at ultralow levels.
authors: Beijing Institute of Transfusion Medicine, PR China.
authors: Xiaohui
authors: X
authors: Wang
authors: Yuan
authors: Y
authors: Li
authors: Jidong
authors: J
authors: Wang
authors: Quanli
authors: Q
authors: Wang
authors: Lijuan
authors: L
authors: Xu
authors: Juan
authors: J
authors: Du
authors: Shaoduo
authors: S
authors: Yan
authors: Yong
authors: Y
authors: Zhou
authors: Qiuxia
authors: Q
authors: Fu
authors: Yingli
authors: Y
authors: Wang
authors: Linsheng
authors: L
authors: Zhan
mesh_terms: D001409:Bacillus cereus / Q000235:genetics; D001419:Bacteria / Q000235:genetics*; D004269:DNA, Bacterial / Q000032:analysis*; D004275:DNA, Ribosomal / Q000032:analysis*; D006046:Gold; D007711:Klebsiella pneumoniae / Q000235:genetics; D057230:Limit of Detection; D053768:Metal Nanoparticles; D043942:Nanotubes; D011550:Pseudomonas aeruginosa / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012706:Serratia marcescens / Q000235:genetics; D013211:Staphylococcus aureus / Q000235:genetics; D013212:Staphylococcus epidermidis / Q000235:genetics; D020349:Surface Plasmon Resonance
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D006046:Gold