Related Experiment Video
Updated: May 17, 2026
An Automated Differential Nuclear Staining Assay for Accurate Determination of Mitocan Cytotoxicity
Published on: May 12, 2020
[Cytotoxicity of Karenia mikimotoi extracts]
Tingting Liu1, Zhanpeng Shi, Hongye Li
1Department of Biotechnology, Jinan University, Guangdong Province's Higher Education Key Laboratory of Eutrophication and Red Tid Control, Guangzhou 510632, China. 398820175@qq.com
Objective:
To investigate the potential threat of K. mikimotoi on human health by analyzing the negative effects of K. mikimotoi extract on three cancer cells, HepG2, HeLa and A549.
Methods:
Inhibitory effect of K. mikimotoi extract on the proliferation of three cancer cells was observed by MTT assay and the relative amount of GM1 in cancer cell membrane was detected by immunofluorescence method.
Results:
The extracts of K. mikimotoi significantly inhibited the proliferation of HeLa, HepG2 and A549 cells in a dose-and time-dependent manner. HeLa and A549 cells were more sensitive than HepG2 cell to the toxicity of K. mikimotoi extracts. However, there was no evident correlation between the proliferative inhibition and the amount of GM1 in cancer cell membrane.
Conclusion:
There was a significant cytotoxicity of K. mikimotoi extracts to mammalian cells, which suggested that their potential threats might be existed to human health. However, the cytotoxic targets of K. mikimotoi extract on cell membrane were complex.
Insights
Karenia mikimotoi extracts exhibit significant cytotoxicity towards human cancer cells (HepG2, HeLa, A549), indicating potential human health risks. Further research is needed to understand the complex cytotoxic mechanisms.
Area of Science:
- Marine biology
- Toxicology
- Cell biology
Background:
- Harmful algal blooms (HABs) caused by dinoflagellates like Karenia mikimotoi can pose ecological and economic threats.
- The potential impact of K. mikimotoi on human health remains incompletely understood, necessitating investigation into its cytotoxic effects.
Purpose of the Study:
- To evaluate the cytotoxic effects of K. mikimotoi extracts on human cancer cell lines (HepG2, HeLa, A549).
- To explore the relationship between K. mikimotoi extract-induced proliferation inhibition and changes in GM1 ganglioside levels in cancer cell membranes.
Main Methods:
- MTT assay was employed to quantify the inhibitory effect of K. mikimotoi extract on cancer cell proliferation.
- Immunofluorescence was used to detect and measure the relative amount of GM1 in the cancer cell membrane.
Main Results:
- K. mikimotoi extracts demonstrated significant dose- and time-dependent inhibition of proliferation across HeLa, HepG2, and A549 cells.
- HeLa and A549 cells exhibited higher sensitivity to K. mikimotoi extract toxicity compared to HepG2 cells.
- No clear correlation was observed between the degree of proliferation inhibition and the levels of GM1 in the cancer cell membrane.
Conclusions:
- K. mikimotoi extracts possess significant cytotoxicity against mammalian cells, suggesting potential risks to human health.
- The specific cytotoxic targets of K. mikimotoi extracts on cell membranes are complex and require further elucidation.
