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Influence of experimental variables on spheroid attributes.
Songshan Zhu1,2, Jun Yin3, Xiaotong Lu1,2
1Guangdong Provincial Key Laboratory of Medical Immunology and Molecular Diagnostics, The First Dongguan Affiliated Hospital, School of Medical Technology, Guangdong Medical University, Dongguan, People's Republic of China.
Scientific Reports
|March 22, 2025
Summary
Optimizing three-dimensional (3D) cell cultures requires controlling oxygen, media, and serum. Standardizing these parameters enhances the reliability of 3D models for drug testing and personalized medicine.
Area of Science:
- Biomedical Research
- Cell Biology
- Tissue Engineering
Background:
- Three-dimensional (3D) cell culture models offer superior physiological relevance compared to traditional 2D cultures.
- Variability in 3D model outcomes hinders reproducibility and clinical translation.
- Key factors influencing 3D model reliability remain incompletely understood.
Purpose of the Study:
- To systematically identify critical parameters affecting the reliability of 3D cell culture spheroids.
- To establish guidelines for standardizing 3D culture protocols.
- To enhance the translational utility of 3D models in biomedical research.
Main Methods:
- Large-scale analysis of 32,000 spheroid images.
- Investigation of oxygen levels, media composition (glucose, calcium), and serum concentrations (0-20%).
- Integration of single-cell RNA sequencing and automated image analysis.
Main Results:
- Oxygen levels significantly impact spheroid size and necrosis.
- Media composition and serum concentrations critically regulate cell viability and structural integrity.
- Specific oxygen levels (3%) and serum concentrations (>10%) were linked to distinct spheroid characteristics and gene expression patterns.
Conclusions:
- Actionable guidelines for standardizing 3D culture protocols were developed.
- A robust framework was established to improve the reliability of 3D models.
- Findings facilitate the broader adoption of 3D models in drug testing, personalized medicine, and tumor biology.
