デング熱に磁気ビーズ DNA 抽出を使用する理由?

導入

Dengue fever, 世界の公衆衛生を脅かす蚊媒介ウイルス性疾患として, 流行は急速かつ重度であることが多い. このような突発的な感染症に対処する際には, 急速な, accurate and early laboratory diagnosis is a key link to effectively control the outbreak and guide clinical treatment.

Viral nucleic acid testing (例えば, RT-PCR) is the “ゴールドスタンダード” for diagnosing dengue fever. In this process, nucleic acid extraction as the first step of the test, its quality and efficiency directly determine the reliability of the final results. Magnetic bead nucleic acid extraction kits, with their excellent performance, have shown irreplaceable advantages in the detection of dengue virus.

1. Advantage

• After dengue virus infection, the viral nucleic acid (RNA) content of the patient’s blood peaks during the viraemia period, but a large amount of host DNA, タンパク質, lipids and PCR inhibitors are also present in the sample.
• The traditional phenol-chloroform extraction method is cumbersome and time-consuming, and is prone to inhibit the subsequent PCR reaction due to the residual organic solvent.
• The magnetic bead method of nucleic acid extraction cleverly circumvents these problems. The core principle is to use surface-modified superparamagnetic nano-magnetic beads to specifically adsorb nucleic acids in a high-salt, low-pH environment, and elute them in a low-salt, 高pH環境.
• This “adsorption-washing-elution” process is like a tailor-made “precision adsorption and purification pipeline” for viral RNA. It can efficiently capture minute amounts of viral RNA from complex patient serum or plasma samples, and remove various impurities through strict washing steps to obtain high-purity nucleic acids. This lays a solid foundation for downstream highly sensitive RT-PCR assays and greatly reduces the risk of false-negative results.

2. 製品

The main advantages of Shanghai LnjnBio 160013 silica-based magnetic beads in dengue virus nucleic acid extraction are reflected in their high adsorption and recovery rates, excellent suspension and stability, highly efficient magnetic response performance, and safe and environmentally friendly automation compatibility.

Strengths	Concrete Expression	Value of application
Efficiency and sensitivity	High adsorption and recovery rate:より多い 95%, especially good at capturing nucleic acids from micro or trace samples.	Reducing false-negative results and improving the sensitivity of the assay.
Ease of operation and stability	Excellent Suspension and Stable process	Simplicity and uniformity, reliability and comparability of test results, especially for large-scale community screening.
Purification effect and anti-interference ability	High purity extraction: it can effectively remove impurities such as proteins and polysaccharides.Wide range of adsorption: it can adsorb a wide range of nucleic acids including small fragments of DNA, RNA, viral nucleic acids.	Ensure that high quality dengue virus RNA is extracted from complex samples, 血などの, to provide high purity templates for subsequent RT-PCR assays and ensure assay accuracy.
Automation and safety and environmental protection	Easy and safe to operate: Suitable for automatic nucleic acid extractor and fully automated workstation to achieve one-button automated extraction; the process does not require the use of toxic reagents such as phenol/chloroform.	Meet the demand for large-scale, high-throughput rapid testing during dengue outbreaks; enhance laboratory biosafety and reduce environmental pollution.

In addition to the core benefits listed in the table, there are a few technical details that are worth noting: the average particle size of this silicon-based magnetic bead is 1.2µm, and this small size provides a large specific surface area, which facilitates full contact with nucleic acids for efficient adsorption. 同時に, the magnetic saturation strength of 65±5 emu/g means that the beads can achieve rapid magnetic response and aggregation under an applied magnetic field, shortening the waiting time during operation, and can be firmly adsorbed during the removal of washing solution, avoiding loss of beads and thus ensuring the yield of nucleic acids.

3.Extension

During the peak of dengue fever outbreaks, laboratories are often under pressure to detect large numbers of samples. Another major advantage of the magnetic bead method is its ease of automation and high-throughput operation. The entire extraction process does not require complex centrifugation and aspiration steps, just add the samples, lysate, magnetic beads and other reagents into the deep-well plate, and then all subsequent operations can be completed by the automated nucleic acid extractor. A single device can handle dozens or even hundreds of samples at a time, shortening the manual operation that originally took several hours to about half an hour.

This automated process of “サンプルイン, 結果が出る” not only greatly liberates manpower, improves testing efficiency, and strives for a valuable “window period” for epidemic prevention and control, but also reduces human error to the maximum extent through standardised operating procedures, ensuring the stability and comparability of test results. It also ensures the stability and comparability of test results through standardised operation procedures, which is crucial for large-scale epidemiological investigation and sentinel surveillance.

Dengue patient samples are potentially infectious substances and it is crucial to ensure the biosafety of the testing personnel. The magnetic bead method is a closed-tube operation, and the whole extraction process is carried out in a sealed deep-well plate, which effectively avoids the generation of aerosols and sample leakage, and significantly reduces the risk of laboratory-acquired infections. 同時に, the method does not use toxic and volatile organic reagents such as phenol and chloroform, which reduces the health hazards to operators and pollution to the environment, and is more environmentally friendly and safe.

4.加えて

The magnetic bead method kits are usually provided in the form of pre-dispensed, ready-to-use kits, with stable performance and long shelf life, which are easy to be stockpiled and transported in CDCs at all levels, hospitals, and laboratories in remote areas, and ensures that the emergency detection capability can be activated rapidly in the event of an epidemic outbreak.

5.summary

 Magnetic bead nucleic acid extraction technology perfectly meets the urgent demand of “速い, accurate and stable” for dengue virus detection by its high efficiency and high purity, convenient automation and high throughput, as well as excellent biosafety and stability. It is not only an upgrade of laboratory technology, but also an important technical pillar for building a modern and efficient infectious disease monitoring and early warning system. In the context of globalisation and in the face of the continuous threat of dengue fever and other mosquito-borne infectious diseases, the promotion and application of advanced nucleic acid extraction technologies, such as the magnetic bead method, is of far-reaching strategic significance for enhancing the public health emergency response capability and safeguarding human health.

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.

当社の製品はさまざまな分野で広く使用されています, 医療検査など, 遺伝子検査, 大学の研究, 遺伝子育種, 等々. 製品のご提供だけでなくOEMも承ります, ODM, その他のニーズ. 関連するニーズがある場合, お気軽にお問い合わせください .