New insights into liver injury and regeneration from single-cell transcriptomics

Area of Science:

• Hepatology
• Molecular Biology
• Genomics

Background:

• Single-cell transcriptomics offers high-resolution insights into cellular responses during acute liver injury (ALI) and regeneration.
• Understanding the complex cellular dynamics of liver repair is crucial for developing effective treatments.

Purpose of the Study:

• To review the application of single-cell transcriptomics in studying ALI and liver regeneration.
• To highlight key discoveries regarding cell subpopulations and their roles in injury and repair.
• To discuss technological platforms, analytical methods, and sample processing for liver scRNA-seq.

Main Methods:

• Integration of single-cell RNA sequencing (scRNA-seq) with spatial transcriptomics.
• Analysis of liver sample processing methods, comparing in vivo enzymatic perfusion and ex vivo digestion.
• Characterization of cellular heterogeneity in hepatocytes, stellate cells, endothelial cells, and macrophages.

Main Results:

• Identification of novel cell subpopulations, including fetal-like and Anxa2+ migratory hepatocytes.
• Characterization of distinct activated hepatic stellate cell states during injury and repair.
• Elucidation of zone-specific endothelial cell responses and macrophage heterogeneity (Trem2+ populations).

Conclusions:

• Single-cell transcriptomics provides transformative insights into ALI and regeneration mechanisms.
• Novel cell subpopulations and states offer new perspectives on liver repair processes.
• This technology holds promise for identifying therapeutic targets for acute liver diseases.