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Cellular Effects of Enterobacteriaceae Polysaccharide Colanic Acid
Sofia A Tsvetikova1, Alina A Zabavkina1, Olesia Ivankova1
1SCAMT Laboratory, National Research University ITMO, St. Petersburg 197101, Russia.
International Journal of Molecular Sciences
|August 10, 2024
Summary
Colanic acid (CA), an exopolysaccharide, shows specific cytotoxicity in cancer cell lines and impacts mitochondria. This suggests potential geroprotective functions, influencing cell differentiation and lifespan.
Area of Science:
- Microbiology
- Cell Biology
- Biochemistry
Background:
- Colanic acid (CA) is an exopolysaccharide produced by Enterobacteriaceae.
- Previous studies indicated CA's role in stimulating physical activity and prolonging lifespan in invertebrates.
- The cellular mechanisms underlying CA's effects remain largely unexplored.
Purpose of the Study:
- To investigate the effects of colanic acid (CA) on various cell lines of different origins.
- To elucidate CA's impact on cell proliferation, mitochondria, and differentiation.
- To assess CA's potential geroprotective properties at the cellular level.
Main Methods:
- Standard MTT assay for metabolic activity and proliferation.
- Fluorescence microscopy for visualizing mitochondrial localization.
- Flow cytometry to analyze apoptosis, ROS levels, and mitochondrial membrane potential.
Main Results:
- CA exhibited slight antiproliferative activity against colorectal cancer (HCT-116), neuroblastoma (IMR-32), and myoblast (C2C12) cell lines at 256 μg/mL.
- Non-cancerous cell lines (Vero, HPF) showed no significant decrease in MTT assay.
- CA induced mitochondrial rearrangement in all tested cell lines and promoted differentiation in C2C12 myoblasts (50-200 μg/mL).
- Increased apoptosis, decreased metabolic activity, altered ROS levels, and changes in mitochondrial membrane potential were observed.
Conclusions:
- Colanic acid demonstrates cell-specific cytotoxicity, primarily affecting cancer and myoblast cell lines.
- CA influences mitochondrial function and induces differentiation, suggesting a role in cellular aging processes.
- These findings support the potential geroprotective function of colanic acid.
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