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Effects of pentadecan-2-one on the growth of cells in culture
Abstract:
The effect of inclusion of trace amounts of pentadecan-2-one in the incubation medium on the growth of HeLa Cells was evaluated by measuring viable cell counts (cells excluding trypan blue) and incorporation of [14C] leucine into acid precipitable protein. Evidence is presented to show that exposure of the cells to trace amounts of the methyl ketone, 36mug/ml, effectively inhibits cell growth. This inhibition is relieved by simultaneously incubating the cells with a long chain primary alcohol, hexadecan-1- o1, but not with the secondary alcohol, pentadecan-2-o1. The observation that the ethyl ketone, hexadecan-3-one, also inhibits cell growth but at higher concentrations than that observed with pentadecan-2-one and that pentadecan-2-o1 at similar concentrations has no effect on cell growth indicates that, for optimal effect, the keto function must be at the 2-position. Inhibition of cell growth by pentadecan-2-one is not unique to HeLa cells, as suggested by the inhibitory effects of this lipid type on the growth of other malignant cell lines of human origin.
Insights
Trace amounts of pentadecan-2-one significantly inhibit HeLa cell growth. This effect is reversed by hexadecan-1-ol, suggesting specific lipid interactions in cell proliferation.
Area of Science:
- Cell Biology
- Biochemistry
- Lipid Metabolism
Background:
- Cell growth is crucial for biological processes and disease development.
- Understanding factors affecting cell proliferation is key to developing targeted therapies.
- HeLa cells are a widely used model for studying human cell biology.
Purpose of the Study:
- To investigate the impact of pentadecan-2-one on HeLa cell growth.
- To determine the role of lipid structure in growth inhibition.
- To explore potential reversal agents for pentadecan-2-one-induced inhibition.
Main Methods:
- Cell viability was assessed using trypan blue exclusion.
- Protein synthesis was measured via [14C] leucine incorporation.
- Cells were incubated with pentadecan-2-one and various alcohols.
Main Results:
- Pentadecan-2-one (36 µg/ml) significantly inhibited HeLa cell growth.
- Hexadecan-1-ol, a primary alcohol, reversed the inhibitory effect.
- Pentadecan-2-ol, a secondary alcohol, did not counteract the inhibition.
- Hexadecan-3-one showed inhibitory effects at higher concentrations, indicating the importance of the keto group's position.
Conclusions:
- Pentadecan-2-one acts as a potent inhibitor of human cell line growth, including HeLa cells.
- The position of the keto group at the 2-position is critical for optimal inhibitory activity.
- Specific long-chain primary alcohols can mitigate the growth-inhibitory effects of pentadecan-2-one.