Metastatic-niche labelling reveals parenchymal cells with stem features

Area of Science:

• Oncology
• Cell Biology
• Biotechnology

Background:

• Investigating early cellular changes induced by metastatic cells in surrounding tissues is difficult.
• Understanding the local metastatic cellular environment is crucial for cancer research.

Purpose of the Study:

• To develop a novel system for spatial identification of the local metastatic cellular environment.
• To characterize tissue cells within the metastatic niche, particularly those with low representation.
• To study the cellular environment of metastatic breast cancer cells in the lung.

Main Methods:

• Development of a system where metastatic cancer cells release a cell-penetrating fluorescent protein.
• Utilizing the fluorescent protein for spatial identification of the local metastatic cellular environment.
• Application of the system to study metastatic breast cancer cells in the lung.

Main Results:

• Identification and characterization of cancer-associated parenchymal cells in the lung metastatic niche.
• These cells exhibit stem-cell-like features, lung progenitor markers, multi-lineage differentiation potential, and self-renewal activity.
• Ex vivo co-culture showed lung epithelial cells acquiring a cancer-associated parenchymal-cell-like phenotype and supporting cancer cell growth.

Conclusions:

• The developed system enables spatial identification and characterization of the local metastatic cellular environment.
• Discovery of cancer-associated parenchymal cells with stem-cell-like properties in lung metastasis.
• These findings highlight the potential of the method as a platform for new discoveries in cancer research.