Lung mesenchymal cells function as an inductive microenvironment for human lung cancer propagating cells†

Area of Science:

• Oncology
• Cancer Biology
• Cell Biology

Background:

• Mesenchymal cells (MCs) play a role in tumor microenvironments.
• Understanding the specific properties of MCs within non-small-cell lung cancer (NSCLC) is crucial for developing targeted therapies.

Purpose of the Study:

• To characterize the biological properties of mesenchymal cells (MCs) isolated from NSCLC.
• To investigate the in vivo tumorigenic potential of these MCs in combination with lung cancer cells.

Main Methods:

• Mesenchymal cells from human lung cancer (hLc-MCs) were isolated from NSCLC specimens and characterized in vitro.
• hLc-MCs were co-injected with Calu-3 lung adenocarcinoma cells into nude mice to assess tumor growth.
• Immunophenotyping and analysis of stemness and cancer-related transcription factors were performed.

Main Results:

• hLc-MCs were successfully isolated from over 80% of NSCLC specimens, exhibiting a typical mesenchymal immunophenotype.
• Co-injection of hLc-MCs significantly increased the size of Calu-3 xenografts in vivo.
• Transcription factors associated with stemness and carcinogenesis were expressed in hLc-MCs, indicating their potential role in tumor progression.

Conclusions:

• Mesenchymal cells (MCs) isolated from NSCLC specimens possess tumor-promoting properties.
• The interaction between mesenchymal cells and tumor-propagating cells is essential for fostering lung cancer development.