Evaluating the Suitability of 3D Bioprinted Samples for Experimental Radiotherapy: A Pilot Study

Area of Science:

• Oncology
• Radiotherapy Research
• Biotechnology

Background:

• Lung cancer is a leading cause of cancer-related mortality worldwide.
• Standardized pre-clinical models are crucial for evaluating novel radiotherapy techniques.
• Current models often lack standardization, hindering inter-institutional comparisons.

Purpose of the Study:

• To assess the feasibility of using 3D bioprinted human lung cancer cell constructs in radiotherapy studies.
• To evaluate the mechanical stability and suitability of these 3D models for pre-clinical research.
• To establish a standardized platform for in vitro radiotherapy outcome assessment.

Main Methods:

• Development of standardized 3D constructs using human lung cancer cells via additive printing.
• Irradiation of 3D printed samples using high-dose-rate broad beam and microbeam radiotherapy techniques.
• Assessment of mechanical stability, cytotoxicity, DNA damage, and cancer cell death in vitro.

Main Results:

• 3D bioprinted lung cancer constructs demonstrated sufficient mechanical stability for microbeam irradiation studies.
• The models withstood peak doses up to 400 Gy, allowing for in vitro analysis of radiotherapy effects.
• Successful evaluation of cytotoxicity, DNA damage, and cell death in response to irradiation.

Conclusions:

• 3D bioprinting offers a viable method for creating standardized human lung cancer models for radiotherapy research.
• These standardized 3D constructs can serve as reliable tools for inter-institutional outcome controls.
• This approach facilitates reproducible pre-clinical evaluation of radiotherapy efficacy and novel therapeutic strategies.