Cách máy siêu âm cắt DNA cung cấp các mảnh sẵn sàng cho NGS trong vài phút

A reliable DNA Shearing Ultrasonicator is the foundation of consistent next-generation sequencing（NGS）library preparation; fragmentation quality directly determines coverage uniformity,variant calling accuracy, and library complexity, shaping every downstream analysis. As sequencing platforms advance and sample throughput increases, laboratories need instruments that maintain the integrity of the sample while producing reproducible fragment size distributions.

Optimization of DNA Fragmentation Techniques to

Maximize Coverage Uniformity of Clinically Relevant Genes Using Whole Genome Sequencing

Focused Ultranonic actuators (FUA) use the BoFU-800 Focused Ultrasonicator from Longlight Technology to fulfill the needs of laboratories. For the first time, laboratories can have NGS-ready DNA fragments in the matter of minutes.

The Importance of NGS and the Value of Efficient DNA DNA Shearing

Contrary to common belief, DNA fragmentation is not the first step in a processing procedure. The quality of the data produced is a direct result of the size fragments produced. Achieving a sufficient coverage of low frequency variants should be around a Poisson distribution. DNA fragmentation should be tight enough that it contributes to a higher density library, and Poisson distributed variants should not be confused with copy-number variations that arise from a low coverage breakpoints.

Although the initial cost of enzyme fragmentation is significantly less, sequence bias is more common. These biases tend to produce more variance in the data collected. Numerous studies conducted by Discovery Life Sciences that have been completed demonstrate that a more consistent size for fragments was obtained with shear methods of DNA fragmentation from low input FFPE samples. For workflows in laboratory environments that have a very low sample volume or where sample preservation is a concern, this predictability of mechanical fragmentation is a distinct advantage.

A Focused DNA Shearing Ultrasonicator vs. Traditional Sonicators

A Focussed DNA Shearing Ultrasonicator uses focused high-frequency ultrasound on the sample. In contrast to this, conventional probe-type and water bath sonicators use dispersed energy and need direct contact with samples.

An example of this system includes the BoFU-800 and its use of confocal ultrasound technology, leading to the following.

1. Controlled, repeatable fragmentation: the incidence of peak and pulse width can be tuned to the DNA to be fragmented, for example, in the ranges of 300 to 600 bp for Whole Genome Sequencing (WGS), or 250 to 350 bp for Whole Exome Sequencing (WES).

2. Non-contact sample processing: samples need not be taken out of high-grade, pre-sealed tubes, maintained hermetic, and hermetic closures for the sample to ensure the sample or any valuable containing nuclear material to not be spoiled.

3. True low-temperature operation: the condensing system is high grade leading to in situ isothermal balance without the chain of events of endothermic reactions or clarification caused by high temperature to the sample subject to the extremely high burst of energy.

When peak incident power is calibrated appropriately, fragment sizes as small as 120-150 bp can be achieved reproducibly across multiple samples. The BoFU-800 can process 1 to 8 samples simultaneously, with independent condition settings per well or batch mode for one-click uniformity—giving laboratories flexibility without sacrificing consistency.

From Sample to Sequencing-Ready Library in Minutes

Time efficiency is a must in a busy lab environment. A state-of-the-art DNA Shearing Ultrasonicator can greatly improve workflow efficiency:

• Reduced hands-on time: The BoFU-800 comes with an integrated operating system, meaning an external computer is no longer required and bench clutter is reduced.

• Real-time processing flexibility: Free mode allows individual treatment of each sample whereas batch processing mode applies the same parameters for an entire batch for time efficient processing.

• Rapid fragment analysis readiness: The narrow and consistent fragment sizes produced by focused ultrasonication removes the need for a time consuming library preparation step.

In environments with clinical sample processing and turnaround times measured in days, not weeks, all of the above equals faster lab case results. The device features automated drainage with one-click waste removal, a built-in water-level sensor with an early warning system, and a time efficient operating cycle, decreasing batch downtime and increasing continuous operating time to subunit sizes.

Compatibility with Difficult and Low-Input Samples

A true DNA Shearing Ultrasonicator harnesses unique sample processing features when the sample processing is difficult. FFPE tissues, liquid biopsies, and degraded clinical specimens, amongst others, present the most difficult and challenging specimen processing available to a modern lab. Traditional sample extraction and shearing methods are not rationally transportable and adoptable to the extreme variability and specimen processing challenges, leading to ill and impractical fragment sizes, or the failure of the entire library preparation.

Focused ultrasonication helps alleviate these concerns. When combined with extraction protocols, acoustic-enhanced extraction yields better quality metrics from archived FFPE samples when compared with conventional column-based methods. The BoFU-800 extends the functionality to the shearing step itself:

• Low-input compatibility: The system effectively shears DNA for small-volume applications, achieving high recoverability.

• FFPE tissue deparaffinization and DNA extraction: The same focused ultrasound principle aids the workflow from tumor tissue blocks and liquid biopsy samples.

• Chromatin shearing for ChIP-seq: In addition to DNA shearing, the device can be utilized for chromatin immunoprecipitation, providing functionality for the lab's epigenetics research.

• The system's ability to shear resistant cell walls and preserve downstream analytes enhances the efficiency of researchers using filamentous fungi or MALDI-TOF MS for Mycobacterium identification.

How is successful library preparation achieved for low quality and low input samples?

Single-strand library preparation technology boosts success rate significantly!

The BoFU-800's batch processing and reproducible outcome suite of functionality delivers flexible solutions to automated library preparation as an essential component of predictable end-to-end sequencing.

Long-read instruments need fragments of 10 kbp or larger without bias. Research has explored the use of beads to achieve 10-20 kbp shear for single molecule sequencing. The BoFU-800 is optimized for shearing to the 150-600 bp range, but focused acoustics also offers the potential for mechanical shearing to scale with sequencing.

A DNA Shearing Ultrasonicator that spans broad shearing ranges provides laboratorie the flexibility to cater to diversifying applications.

Constructing a Consistent NGS Workflow

In genomics, the best currency one can have is reproducibility. Unfortunately, every library prep method exposes the laboratories to a certain amount of technical variability. The objective of every tech company is to engineer their devices to reduce variability to the bare minimum. A factory calibrated DNA Shearing Ultrasonicator (with correct construction) benefits you by:

1. Reliable instrument usage: Since all of them deliver the same amount of energy per sample well, all Ultrasonicator insurances are one of a kind kind of factory calibrations.

2. Sample processing history: The Ultrasonicator documents the processing parameters and conditions, and gives the operator the ability to access to full experimental data transparency and audit readiness.

3. Minimization of operator variability: Because of batch processing and the risk of operator variability is eliminated.

These features are not merely convenience enhancements; they are prerequisites for moving from discovery-scale research to regulated diagnostic applications where consistency across batches and operators is mandatory.

Kết thúc

Modern genomics demands higher throughput, lower input, and tighter quality control. A DNA Shearing Ultrasonicator like the BoFU-800 delivers NGS-ready fragments in minutes via focused acoustic energy, non-contact processing, and real-temperature control in a compact, batch-friendly design. By enabling consistent fragmentation across 1–8 samples and supporting applications from FFPE extraction to chromatin shearing, the BoFU-800 helps labs achieve the reproducibility and efficiency that reliable NGS results require—less troubleshooting, more discovery.

��� Explore the BoFU-800 Focused Ultrasonicator and request a quote at www.longlight.com.

FAQs

Q: Can the BoFU-800 shear DNA for NGS quickly?

A: The speed of fragmentations is sample dependent. Most samples fragment to the target range between 150-600bp within just Minutes.

Q: Can samples be damaged due to heating when using the focused ultrasonication?

A: The BoFU-800 tries to control the temperature to be isothermal.Thus, samples are not damaged due to heating.

Q: Can I process samples with varying conditions in one run?

A: Yes. Free mode allows you to set the parameters for all the 8 wells independently, while the batch mode will set the same parameters to all wells.

Q: Can the BoFU-800 be used with low input samples or FFPE samples?A: Yes. The focused acoustics are capable of using even 1 ng of DNA. The closed-tube usage is also helpful for the preservation of FFPE extracted samples.

Q: Do I need to have my own computer to operate the device?

A: No. The BoFU-800 has an inbuilt operating system so you do not need extra computer. Thus, taking less space on the bench for the setup.