磁気ビーズ法による核酸抽出技術: 新型コロナウイルス変異種の蔓延と闘うための重要な支援

Recently, many countries around the world have reported a significant increase in cases of infection with the novel coronavirus variants (such as KP.2, KP.3, 等). The World Health Organization (WHO) has warned that the immune evasion ability of these variants may trigger a new wave of the epidemic. In response to the rapid spread of the variants, various countries have resumed nucleic acid testing and virus genome monitoring systems. Against this backdrop, the magnetic bead-based nucleic acid extraction technology, with its advantages of high efficiency, stability, and automation, has once again become a core tool for large-scale screening and precise diagnosis, providing key technical support for global epidemic prevention and control.

Monitoring of variant strains places higher demands on nucleic acid extraction.

The continuous mutation of the novel coronavirus poses challenges to the sensitivity and specificity of detection. The new variant strains often have stronger transmissibility, and some of them may lead to a decline in the neutralizing efficiency of existing antibodies. したがって, quickly and accurately extracting viral nucleic acids from clinical samples (such as throat swabs, 唾液, 等) is the first step to ensure the reliability of PCR testing and genetic sequencing. Traditional nucleic acid extraction methods (such as centrifugal column method) are cumbersome to operate and have low throughput, making them difficult to meet the large-scale testing requirements in sudden public health emergencies. しかし, the magnetic bead method, through the specific binding of magnetic microspheres to nucleic acids, can complete batch sample processing within 30 minutes and is compatible with automated equipment, significantly improving the detection efficiency.

The technical advantages of the magnetic bead method in the prevention and control of variant strains

1. High-throughput for large-scale screening

During the prevalence of variant strains, some countries (such as the United States and India) have expanded the scope of nucleic acid testing again, and even resumed entry testing requirements. The magnetic bead method can be integrated into an automated extraction platform, with a single machine capable of processing thousands of samples per day, far exceeding the limit of manual operation. 例えば, in the winter of 2023, China achieved a daily testing capacity of over 10 million person through automated equipment using the magnetic bead method.

2. High purity for ensuring sequencing accuracy

Genomic analysis of variant strains requires high-quality nucleic acid templates. The magnetic bead method can effectively remove inhibitors (such as mucus,hemoglobin) from samples through optimized surface modification techniques (such as silanol coating), resulting in higher nucleic acid purity and providing a reliable foundation for subsequent sequencing and variant site identification.

3. Flexible response to complex sample types

With the deepening of research on virus transmission routes,new detection scenarios such as wastewater monitoring and aerosol sampling have emerged. The magnetic bead method’s strong adaptability to complex samples (such as environmental wastewater,animal-derived samples) makes it particularly outstanding in cross-species transmission warnings (such as avian influenza H5N1).

4. Promoting technological iteration and domestic substitution

The spread of this variant strain has also accelerated the upgrade of nucleic acid extraction technology. Domestic enterprises (such as BGI and Daan Genomics) have further reduced testing costs by optimizing magnetic bead materials and buffer systems,and developed portable solutions such as freeze-dried reagents,helping to support prevention and control in resource-poor areas. 加えて,the combination of the magnetic bead method and CRISPR rapid detection technology is expected to achieve “sample input – result output” immediate diagnosis,providing a more flexible solution for future epidemic prevention and control.

From Alpha to Omicron, and then to the current KP series variants, the magnetic bead-based nucleic acid extraction technology has always been the “backstage hero” in the field of molecular diagnostics. In the face of the long-term challenge of virus mutations, this technology will continue to support the global public health defense system with its efficient and stable characteristics, and set a benchmark for infectious disease prevention and control in the era of precision medicine.

サプライヤー

上海霊軍生物技術有限公司, 株式会社に設立されました 2016 生体磁性材料と核酸抽出試薬の専門メーカーです.

核酸抽出・精製の経験が豊富です。, タンパク質の精製, 細胞分離, 化学発光, その他の技術分野.

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