Well-Paired-Seq2: High-Throughput and High-Sensitivity Strategy for Characterizing Low RNA-Content Cell/Nucleus...

Area of Science:

• Genomics
• Molecular Biology
• Biotechnology

Background:

• Single-cell RNA sequencing (scRNA-seq) is crucial for understanding cellular heterogeneity.
• Existing scRNA-seq methods face limitations in cell capture efficiency and sensitivity, particularly for samples with low RNA content.
• These limitations hinder high-throughput analysis and the study of rare cell types or challenging sample sources.

Purpose of the Study:

• To introduce Well-Paired-Seq2 (WPS2), an advanced scRNA-seq technology designed to overcome current throughput and sensitivity challenges.
• To demonstrate WPS2's capability in efficiently capturing cells and characterizing transcriptomes from low RNA-content samples, including nuclei.
• To validate WPS2's performance using clinical samples and identify novel biological insights.

Main Methods:

• WPS2 utilizes size-exclusion and quasi-static hydrodynamics for enhanced cell capture efficiency.
• The method incorporates molecular crowding, tailing activity enhancement during reverse transcription, and homogeneous enzymatic reactions for improved amplification.
• Initial amplification is bead-based, optimizing the capture and barcoding of single cells.

Main Results:

• WPS2 achieved an average of ~20,000 reads per cell, detecting 3116 genes and 8447 transcripts.
• Compared to its predecessor, WPS2 identified 1420 more genes and 4864 more transcripts, significantly improving sensitivity.
• The technology successfully profiled transcriptomes from frozen clinical samples, revealing copy number variations and intercellular crosstalk in clear cell renal cell carcinomas.
• WPS2 provided the first single-cell characterization of metanephric adenoma (MA), identifying potential specific markers.

Conclusions:

• WPS2 represents a significant advancement in scRNA-seq technology, offering high sensitivity and high throughput.
• The method effectively addresses limitations associated with low RNA-content cells and nuclei, surpassing the Poisson limit for capture.
• WPS2 demonstrates broad applicability in basic and clinical research, including the analysis of complex diseases and rare tumors.