Rapid microdissection of tissue sections via laser ablation

Area of Science:

• Biotechnology
• Genomics
• Histology

Background:

• Laser capture microdissection (LCM) is a standard technique for isolating specific cells or tissues.
• Conventional LCM can be time-consuming, limiting throughput in large-scale studies.

Purpose of the Study:

• To develop and validate a significantly faster method for tissue microdissection.
• To assess the impact of the novel technique on tissue yield and sample quality for genomic analysis.

Main Methods:

• Utilized scanning laser optics and a specialized slide coating for rapid tissue ejection.
• Developed a novel scanning laser ablation technique for microdissection.
• Evaluated dissection speed, tissue yield, and sample integrity (insert size, base quality).

Main Results:

• Achieved dissection speeds approximately 100 times faster than conventional LCM (0.117 s/mm²).
• Obtained substantial tissue areas (58–416 mm²) rapidly (7–48 seconds per case).
• Exome sequencing confirmed no reduction in yield, insert size, or base quality; variant allelic fraction increased in tumor-enriched regions.

Conclusions:

• The scanning laser ablation method offers a highly efficient and rapid approach to tissue microdissection.
• This technique is suitable for both research and clinical settings, preserving sample quality for genomic applications.
• Enables faster isolation of specific tissue regions for downstream molecular analyses, including cancer genomics.