Comparing Xenium 5K and Visium HD data from identical tissue slide at a pathological perspective.

Area of Science:

• Spatial transcriptomics
• Molecular pathology
• High-resolution imaging

Background:

• Visium-HD (sequencing-based) offers 2µm resolution and whole-transcriptome coverage.
• Xenium in-situ (imaging-based) provides sub-micron resolution for targeted gene detection.
• Both technologies were applied to identical lung tissue slides for direct comparison.

Discussion:

• Visium-HD provides broader gene detection and may identify more tumor subclones.
• Xenium-5K achieves comparable results with advanced clustering algorithms.
• Xenium's single-cell segmentation is advantageous for irregular cell shapes.

Key Insights:

• Xenium's reliance on fluorescent signals poses challenges in pigmented tissues (e.g., melanoma, macrophages).
• Visium-HD may be superior for applications involving heavily pigmented tissues.
• Pathological considerations are crucial for selecting the optimal spatial transcriptomics approach.

Outlook:

• Further validation of Xenium's performance with robust clustering is warranted.
• Investigating Visium-HD's utility in challenging pigmented tissue environments is important.
• Tailoring spatial transcriptomics technology choice to specific research questions and tissue types is essential for advancing cancer research.