Normal mesothelial cell lines newly derived from human pleural biopsy explants

Area of Science:

• Cell Biology
• Tissue Engineering
• Oncology

Background:

• Mesothelial cells form a monolayer lining body cavities, crucial for homeostasis and disease modeling.
• A significant lack of reliable primary human mesothelial cell (HMC) lines hinders research into their function and associated diseases.
• Existing HMC models often fail to accurately replicate in vivo characteristics, limiting their utility.

Purpose of the Study:

• To establish a reproducible method for recovering and immortalizing human mesothelial cells (HMC) from pleural tissue.
• To generate patient-specific HMC cultures that retain in vivo phenotypic and physiological characteristics for extended in vitro study.
• To create a valuable resource for researching normal mesothelial cell physiology and developing disease models, including malignant mesothelioma.

Main Methods:

• Human pleural tissue was obtained via minimally invasive surgical techniques.
• HMC were isolated using a combination of explant outgrowth and flow cytometry (cadherin-1 and CD71 expression).
• Cells were immortalized through lentiviral transfection with human telomerase.

Main Results:

• A novel strategy successfully recovered and immortalized HMC from human pleural tissue.
• The generated HMC cultures maintained phenotypic and physiological fidelity to their in vivo counterparts.
• A specific HMC line with a BAP1 mutation was created, offering a tool for malignant mesothelioma research.

Conclusions:

• This surgical approach provides a limitless supply of novel, patient-specific HMC cultures for research.
• These HMC cultures serve as powerful tools for investigating normal mesothelial cell biology and disease processes.
• The development of these reliable HMC models significantly advances the potential for in vitro research in oncology and cell homeostasis.