المهنية في صناعة الخرز المغناطيسي الحيوي
لماذا يستخدم المزيد والمزيد من معلمي الجامعات طريقة الخرز المغناطيسي بدلاً من الطريقة التقليدية?
في السنوات الأخيرة, تكنولوجيا استخراج الحمض النووي القائم على الخرز المغناطيسي has been rapidly popularized in universities and research institutions, استبدال تدريجي للطرق التقليدية لاستخراج الفينول كلوروفورم وطرق عمود الطرد المركزي. This is mainly attributed to its high efficiency, potential for automation, أمان, and adaptability to complex samples. The following is the specific analysis of the reasons:
1. Easy to operate and compatible with high-throughput automation
Pain points of traditional methods
Phenol-chloroform method: It requires multiple centrifugations and phase separations, is cumbersome to operate and prone to contamination.
طريقة عمود الطرد المركزي: It involves many manual steps (such as lysis, column passing, غسل, إلخ.) and has a low throughput.
Advantages of the magnetic bead method
After the magnetic beads bind to nucleic acids, they can be rapidly separated through a magnetic field (without the need for centrifugation) and directly integrated into a 96-well plate automated platform, وهي مناسبة لمعالجة العينات على نطاق واسع (such as epidemiological screening and omics research).
قضية: During the COVID-19 pandemic, the magnetic bead method became the preferred choice for high-throughput nucleic acid testing.
2. Higher extraction efficiency and purity
Strong binding specificity
Silicon-based magnetic beads selectively adsorb nucleic acids under high-salt conditions, reducing protein and polysaccharide contamination (the traditional phenol-chloroform method is prone to residual organic solvents, and the centrifugal column method is prone to clogging).
High recovery rate
Magnetic beads have a large surface area, and their capture efficiency for small DNA/RNA fragments and low-concentration samples is superior to that of centrifugal columns (على سبيل المثال, the recovery rate of cfDNA extraction is increased by 20% ل 30%).
Data support
Literature reports that the A260/A230 ratio of plant RNA extracted by magnetic bead method is generally greater than 2.0, while the traditional method often leads to a ratio of less than 1.5 due to polysaccharide residue.
3. Wider sample applicability
Complex sample processing capability
The magnetic bead method can be adapted to difficult-to-extract samples such as plant tissues, البراز, تربة, and FFPE sections by adjusting the buffer solution (such as adding CTAB or PVPP), while the centrifugal column method is prone to clogging.
Flexibly respond to trace samples
Magnetic beads can bind to trace amounts of nucleic acids (such as Pg-level DNA in single-cell sequencing), but the loss rate of traditional methods is high.
4. Safety and environmental protection advantages
Avoid toxic reagents
The magnetic bead method does not require carcinogens such as phenol and chloroform, reducing the health risks to laboratory personnel.
Reduce plastic waste
The centrifugal column method consumes a large amount of plastic consumables, while the magnetic bead method can reuse magnetic beads (على سبيل المثال, some models can be recycled 35 مرات), وهو أكثر صديقة للبيئة.
5. Optimization of cost-benefit ratio
High initial cost, more economical in the long term
Although the unit price of magnetic bead reagents is high, automation can reduce labor costs and is especially suitable for large-scale projects.
University case: A laboratory’s comparison found that when processing 1,000 samples, the total cost of the magnetic bead method was 15% ل 20% lower than that of the centrifugal column method.
Acceleration of domestic substitution
الخرز المغناطيسي المنزلي (such as Nanomicro and Borui) have performance close to imported brands, but their prices are only 1/3 ل 1/2, which promotes their popularization.
6. Technology Integration and cutting-edge applications
Compatible molecular diagnostic technology
The nucleic acids extracted by the magnetic bead method can be directly used for qPCR, NGS and CRISPR detection without additional purification.
Demand in emerging fields
Single-cell sequencing, خزعة سائلة (ctDNA), and other methods that require high-purity nucleic acids, the magnetic bead method is the mainstream choice.
The selection logic of universities/research institutions
1. Efficiency-driven: The labor cost for postgraduate students is high, and automation liberates labor.
2. Data quality requirements: High-throughput sequencing and other methods require high-purity nucleic acids, and the magnetic bead method is more reliable.
3. Safety and Compliance: EHS (Environmental Health and Safety) management in colleges and universities is becoming stricter, and phenolic reagents are being phased out.
الاتجاهات المستقبلية
The surface modification of magnetic beads is diverse: such as EPCAM-modified magnetic beads suitable for exosome extraction.
Microfluidic integration: The combination of magnetic bead method and Lab-on-a-chip to achieve “عينة في, النتيجة”.
طريقة الخرزة المغناطيسية, with its characteristics of “أمان, efficiency and flexibility”, has become the mainstream choice for nucleic acid extraction. Especially in the context of the demand for complex samples and high throughput in scientific research scenarios, it is inevitable to replace traditional methods.
مزود
شركة شنغهاي لينغجون للتكنولوجيا الحيوية, المحدودة.تأسست في 2016 وهي شركة متخصصة في تصنيع المواد المغناطيسية الحيوية وكواشف استخلاص الحمض النووي.
لدينا خبرة غنية في استخراج وتنقية الحمض النووي, تنقية البروتين, فصل الخلايا, التألق الكيميائي, وغيرها من المجالات التقنية.
منتجاتنا تستخدم على نطاق واسع في العديد من المجالات, مثل الفحوصات الطبية, الاختبارات الجينية, البحوث الجامعية, التكاثر الوراثي, وهكذا. نحن لا نقدم المنتجات فحسب، بل يمكننا أيضًا إجراء تصنيع المعدات الأصلية, أوديإم, وغيرها من الاحتياجات. إذا كان لديك حاجة ذات صلة, لا تتردد في الاتصال بنا .
