Improved next-generation sequencing pre-capture library yields and sequencing parameters using on-bead PCR

Area of Science:

• Molecular Biology
• Genomics
• Oncology

Background:

• Tumor DNA sequencing is clinically significant but often limited by low DNA input from small biopsies.
• Current next-generation sequencing (NGS) library preparation methods struggle with limited DNA amounts, leading to high failure rates.

Purpose of the Study:

• To develop an improved library preparation method for next-generation sequencing (NGS) using limited tumor DNA input.
• To enhance library yields and reduce sample failure rates in the analysis of formalin-fixed paraffin-embedded (FFPE) tumor DNA.

Main Methods:

• Implemented an on-bead PCR technique for pre-capture library generation in a standard NGS workflow.
• Utilized formalin-fixed paraffin-embedded (FFPE)-derived tumor DNA as input material.
• Compared library yields and sequencing parameters before and after the method improvement.

Main Results:

• The on-bead PCR method significantly increased library yields compared to the standard method.
• Reduced sample failure rates were observed due to higher library output.
• Fewer PCR cycles were required, leading to improved sequencing parameters without compromising variant calling accuracy.

Conclusions:

• The developed on-bead PCR pre-capture library generation is an effective improvement for NGS with low DNA input.
• This methodology enhances the utility of tumor DNA sequencing, particularly from small biopsies.
• The approach is broadly applicable to various NGS systems facing DNA input limitations.