Pericyte phenotype switching in cancer

Area of Science:

• Oncology
• Vascular Biology
• Cancer Immunology

Background:

• Pericytes are vital for maintaining blood vessel integrity.
• In cancer, pericytes transform, promoting tumor progression, vascular instability, and immune evasion.
• Tumor pericytes exhibit plasticity, enabling a switch between states.

Purpose of the Study:

• To explore the role of pericyte plasticity in cancer.
• To investigate therapeutic strategies targeting pericyte phenotype switching.
• To assess the potential of pericyte modulation in combination cancer therapy.

Main Methods:

• Analysis of transcriptomics and functional data on tumor pericytes.
• Investigation of signaling pathways (oncogenic, metabolic, microtubule) influencing pericyte phenotype.
• Evaluation of Rho kinase activity in pericyte modulation.
• Preclinical models assessing combination therapy efficacy.

Main Results:

• Cancer pericytes shift from quiescent to proliferative, matrix-secreting phenotypes.
• This shift destabilizes tumor vasculature and creates immune-excluded zones.
• Tumor pericytes can be therapeutically induced to revert to a quiescent, contractile state.
• Targeting specific pathways can trigger this beneficial phenotype switch.

Conclusions:

• Pericyte plasticity is a key factor in tumor progression and response to therapy.
• Targeting pericyte phenotype switching offers a novel strategy for tumor vessel normalization.
• Harnessing pericyte plasticity can enhance the efficacy of targeted anticancer treatments and immunotherapy.