Single-cell transcriptomics brings stroke thrombi into cellular and molecular focus: A commentary on "characterizing...

Area of Science:

• Cerebrovascular pathobiology
• Immunology
• Molecular biology

Background:

• Ischemic stroke thrombi were previously considered inert embolic material.
• Understanding the cellular composition and function of stroke thrombi is crucial for cerebrovascular pathobiology.

Purpose of the Study:

• To investigate the cellular and molecular characteristics of human ischemic stroke thrombi.
• To determine if stroke thrombi retain etiology-specific identities after embolization.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) was applied to thrombectomy-retrieved human thrombi.
• Analysis of transcriptomic data to identify distinct cell populations and their functions.

Main Results:

• Stroke thrombi are structured, immunologically active microenvironments, not inert material.
• Thrombi exhibit etiology-specific cellular and functional identities.
• Findings support emerging spatial and multimodal evidence on thrombus characteristics.

Conclusions:

• Single-cell transcriptomic profiling provides novel insights into cerebrovascular pathobiology.
• Stroke thrombi are dynamic, biologically active entities influenced by stroke etiology.
• These findings have implications for understanding and potentially treating ischemic stroke.