Cell Line: Cultured cells with specific properties or markers isolated from primary cultures or cell strains via selective cloning.
3D Cell Culture: A culture technique enabling biological cells to grow across all three dimensions within an engineered artificial environment. Cells migrate and proliferate inside the 3D scaffold to form cell-scaffold complexes. In vitro 3D culture recapitulates in-vivo omnidirectional cell growth, retaining structural and compositional features of native cellular microenvironment while preserving the controllability and visibility of conventional cell culture.
What breakthroughs can be achieved by combining cell lines with 3D cell culture technology?
Five malignant cell lines including AGS (human gastric adenocarcinoma), MDAH-2774 & SK-OV-3 (human ovarian carcinoma), PANC-1 (human pancreatic carcinoma) and Hep G2 (human hepatocellular carcinoma) were cultured under conventional 2D and 3D systems for comparative analysis. Refer to the attached video for detailed experimental protocols.
Passaged cells derived from identical parent populations were split into two groups: one maintained in 2D monolayer culture, the other cultured with CopGel 3D Spheroid Hydrogel Kit (Cat.No: CR01A01-05/10). Cell viability of the 3D-cultured groups was quantified as shown below:
Figure A: Microscopic images of five cell lines cultured in 2D and 3D conditions respectively.
Figure B: Quantitative cell viability data of five cell lines under 3D culture.
RT-PCR was performed to detect mRNA expression levels of stemness markers CD24, CD44, CD90, Oct-4 and Nanog in 2D vs 3D cultured cells, results are displayed below:
White bars: 2D cultured samples; Black bars: 3D cultured samples.
Most tested cell lines exhibited significantly higher stemness-related gene expression under 3D culture compared with conventional 2D monolayer culture, verifying that 3D culture better mimics the in-vivo phenotype of cancer stem cells (CSC).
Accordingly, 3D culture serves as a superior in-vitro model for cancer stem cell research over 2D culture. Likewise, 3D models deliver more physiologically relevant results in anti-tumor drug screening, which will be elaborated in our next article.
