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客戶采用我司不同修飾硅磁珠，研究了磁珠大小、磁珠表面基團在動物組織樣本基因組提取過程中的影響，為核酸提取磁珠的選擇使用提供理論支撐。

Peipei Li, Menghang Li, Fan Zhang, Mengyuan Wu, Xiaobin Jiang, Bo Ye, Zhenjun Zhao, Dongmei Yue, Qi Fan, Haixia Chen, High-efficient nucleic acid separation from animal tissue samples via surface modified magnetic nanoparticles,Separation and Purification Technology,Volume 262,2021,118348, 

Abstract
High efficiency nucleic acid (NA) separation via magnetic nanoparticles (MNPs) is a promising technology for bioengineering, healthcare, etc. Aimed to enhance the selection of MNPs and illustrate the separation mechanism for effective isolation of NAs from complex animal samples, this study fabricated hydroxy-, amino- and carboxyl-functionalized MNPs (MNPs-OH, MNPs-NH2 and MNPs-COOH) with different particle sizes to investigate the hybrid NA separation performance from animal tissue samples. Molecular dynamics (MD) simulation was introduced to predict the affinity action of MNPs with NA and typical impurities. The details of the kinetic separation behavior and the NA separation performance were then illustrated. MD simulation results showed MNPs-NH2 had a stronger affinity with NA, and in most experimental separation systems, NA separation yield via three kinds of MNPs showed a following order of MNPs-NH2 > MNPs-OH > MNPs-COOH. MNPs of different sizes had significantly different sedimentation and dispersion features, leading to diverse separation results. Combining with the proper lysis system, an optimized NA separation method at room temperature with high-throughput and low contamination risk was developed as a promising approach for large-scale samples extracted NA simultaneously. This work could provide a theoretical guidance for the fabrication strategy of advanced MNPs and the enhancement of NA separation from complex samples.


摘要
利用磁性納米粒子（MNPs）高效分離核酸是生物工程、醫(yī)療保健等領域的一項很有前途的技術。為了提高MNPs的選擇性，闡明從復雜動物樣品中有效分離核酸的分離機理，本研究制備了羥基-，研究了不同粒徑的氨基和羧基功能化MNPs（MNPs-OH、MNPs-NH2和MNPs-COOH）從動物組織樣品中分離雜交NA的性能。采用分子動力學模擬方法預測了MNPs與NA及典型雜質(zhì)的親和作用。詳細說明了動力學分離行為和鈉分離性能。MD模擬結果表明，MNPs-NH2對NA有較強的親和性，在大多數(shù)實驗分離體系中，三種MNPs對NA的分離率依次為MNPs-NH2>MNPs-OH>MNPs-COOH。不同粒徑的MNPs具有明顯不同的沉降和分散特性，導致分離效果不同。結合合適的裂解體系，建立了一種高通量、低污染風險的室溫鈉分離方法，為大規(guī)模樣品同時提取鈉提供了一種新的途徑。這項工作為先進MNPs的制備策略和提高復雜樣品中NA的分離提供了理論指導。

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