Single-nucleus RNA-seq dissection of choroid plexus tumor cell heterogeneity

Area of Science:

• Oncology
• Genomics
• Cell Biology

Background:

• Choroid plexus neoplasms are rare tumors with poorly understood genomic, genetic, and cellular regulation.
• Limited data exists on the cellular heterogeneity and molecular drivers of these neoplasms.

Purpose of the Study:

• To investigate the cellular and transcriptional heterogeneity of human choroid plexus tumors.
• To create a single-cell expression atlas for normal and cancerous choroid plexus.
• To identify potential therapeutic targets for these rare tumors.

Main Methods:

• Single-nucleus transcriptome analysis of 23,906 cells from normal choroid plexus and choroid plexus tumors.
• Profiling of cellular diversity, copy number alterations, and cell-cell interactions.
• Correlation of transcriptional changes with genome-wide methylation profiles.

Main Results:

• Detailed expression atlas of cellular and transcriptional diversity in choroid plexus tumors.
• Identification of transcriptional alterations in tumor epithelial cells linked to methylation profiles.
• Characterization of tumor-specific stromal microenvironments, including altered macrophage and mesenchymal cell states and extracellular matrix components.

Conclusions:

• This study provides the first single-cell dataset for choroid plexus neoplasms, offering valuable insights into their heterogeneity.
• The findings highlight distinct cellular states and microenvironmental changes in these rare tumors.
• This resource is expected to aid in the development of novel therapeutic strategies.