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Updated: Jun 20, 2026
12:17
Detection and Isolation of Apoptotic Bodies to High Purity
Published on: August 12, 2018
Apoptosis execution is spatially regulated
Nevena Milivojević Dimitrijević1, Ana Mirić1, Tijana Đukić1
1Department of Science, University of Kragujevac, Institute for Information Technologies Kragujevac, Liceja Kneževine Srbije 1A, 34000, Kragujevac, Serbia.
Summary
Comparing two-dimensional (2D) and three-dimensional (3D) cell cultures reveals that spatial context significantly impacts tumor cell response to cytotoxic agents. Molecular markers for apoptosis do not always predict cell death outcomes in 3D models.
Area of Science:
- Biomedical research
- Cell biology
- Cancer research
Background:
- Two-dimensional (2D) cell cultures offer simplicity but lack intercellular interactions and spatial organization.
- Three-dimensional (3D) cell culture models provide a more physiologically relevant environment for studying cell behavior.
- Understanding cell response in different culture dimensions is crucial for drug development and disease modeling.
Purpose of the Study:
- To compare the apoptotic response of tumor cells to cytotoxic chemical complexes in 2D versus 3D culture systems.
- To investigate the influence of spatial context on cell death pathways and outcomes.
- To correlate molecular apoptosis markers with phenotypic cell death in different culture dimensions.
Main Methods:
- Utilized two-dimensional (2D) and three-dimensional (3D) cell culture models of HCT-116 tumor cells.
- Administered cytotoxic gold(III) complexes to induce apoptosis.
- Quantified proapoptotic markers (Bax/Bcl-2 ratio, caspase-3 activity) and assessed phenotypic cell death (viable cells, late apoptosis).
- Employed a mathematical model to analyze and interpret observed differences.
Main Results:
- Proapoptotic molecular markers were elevated in 2D cultures, yet 3D cultures exhibited a higher frequency of late apoptosis and reduced viable cells.
- A discrepancy was observed between molecular apoptosis markers and the actual phenotypic outcome of cell death.
- Mathematical modeling suggested localized hypoxia and metabolic adaptation within the 3D system.
Conclusions:
- The spatial context of cell culture significantly influences the execution of apoptosis, challenging direct interpretation of molecular markers alone.
- Two-dimensional and three-dimensional models represent qualitatively distinct responses to cytotoxic agents.
- Apoptosis execution is demonstrably shaped by the spatial microenvironment, warranting further validation in diverse cell lines and platforms.
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