Distinct mesenchymal cell states mediate prostate cancer progression

Area of Science:

• Oncology
• Cell Biology
• Genomics

Background:

• Mesenchymal cells are crucial in the tumor microenvironment (TME).
• Their specific roles in prostate cancer (PCa) progression and metastasis are not fully understood.
• Understanding stromal dynamics is key to deciphering PCa pathogenesis.

Purpose of the Study:

• To delineate molecular changes in tumor stroma influencing PCa progression and metastasis.
• To identify specific mesenchymal cell populations and their functions in PCa.
• To develop novel prognostic markers for PCa metastasis.

Main Methods:

• Single-cell RNA sequencing of mesenchymal cells from mouse models and human tumors.
• Comparative analysis of stromal cell transcriptional identities across species.
• Correlation of stromal signatures with PCa progression and bone metastasis.

Main Results:

• Identified eight distinct stromal cell populations with conserved transcriptional identities in mice and humans.
• Stromal signatures in advanced mouse PCa mirror human bone metastases.
• Highlighted periostin's role in PCa invasion and differentiation.
• Derived a gene signature predicting metastatic progression in localized PCa.

Conclusions:

• Stromal cell dynamics significantly influence prostate cancer progression and metastasis.
• Identified key mesenchymal cell populations and their roles in PCa.
• Developed a novel gene signature for predicting PCa metastatic risk, potentially improving patient stratification and treatment strategies.