Taraxerol Induces Cell Apoptosis through A Mitochondria-Mediated Pathway in HeLa Cells
Xiangyang Yaoi1, Binyu Lu2, Chaotian Lü1
1Department of Biology and Food Engineering, Bengbu University, Bengbu, China.
Objectives:
Taraxerol acetate has potent anti-cancer effects via the induction of apoptosis, autophagy, cell cycle arrest, and inhibition of cell migration. However, whether taraxerol induced apoptosis and its underlying mechanisms of action is not clear. In the present study, we assess the effects of taraxerol on the mitochondrial apoptotic pathway and determine the release of cytochrome c to the cytosol and activation of caspases.
Materials And Methods:
In this experimental study, we mainly investigated the effect of taraxerol on HeLa cells. We tested cell viability by the MTT assay and morphologic changes, analyzed apoptosis by DAPI staining and flow cytometry. We also determined reactive oxygen species (ROS) and mitochondrial membrane potential (MMP) using a Microplate Reader. In addition, the apoptotic proteins were tested by Western blot.
Results:
Taraxerol enhanced ROS levels and attenuated the MMP (Δψm) in HeLa cells. Taraxerol induced apoptosis mainly via the mitochondrial pathway including the release of cytochrome c to the cytosol and activation of caspases 9 and 3, and anti-poly (ADPribose) polymerase (PARP). Taraxerol could induce the down-regulation of the anti-apoptotic protein Bcl-2 and up-regulation of pro-apoptotic protein Bax. It suppressed the PI3K/ Akt signaling pathway.
Conclusions:
These results demonstrated that taraxerol induced cell apoptosis through a mitochondria-mediated pathway in HeLa cells. Thus, taraxerol might be a potential anticervical cancer candidate.
Insights
Taraxerol induces apoptosis in cervical cancer cells by disrupting mitochondrial function and activating key cell death pathways. This natural compound shows promise as a potential anti-cervical cancer therapeutic agent.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Taraxerol exhibits anti-cancer properties, including apoptosis induction.
- The precise mechanisms by which taraxerol triggers apoptosis remain unclear.
- This study investigates taraxerol's impact on the mitochondrial apoptotic pathway.
Purpose of the Study:
- To elucidate the role of taraxerol in inducing apoptosis in HeLa cells.
- To determine the involvement of the mitochondrial pathway, including cytochrome c release and caspase activation.
- To explore the effects of taraxerol on key apoptotic proteins and signaling pathways.
Main Methods:
- Cell viability assessed using MTT assay.
- Apoptosis analyzed via DAPI staining and flow cytometry.
- Mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) measured.
- Western blot used to evaluate apoptotic protein expression and signaling pathway modulation.
Main Results:
- Taraxerol increased ROS levels and decreased MMP in HeLa cells.
- Apoptosis was induced via the mitochondrial pathway, evidenced by cytochrome c release and caspase-3 activation.
- Taraxerol modulated Bcl-2 and Bax protein levels and inhibited the PI3K/Akt pathway.
Conclusions:
- Taraxerol effectively induces apoptosis in HeLa cells through a mitochondria-dependent mechanism.
- These findings suggest taraxerol as a potential candidate for cervical cancer treatment.
More Related Videos
Related Concept Videos
01:30Apoptosis
01:17The Extrinsic Apoptotic Pathway
01:31The Intrinsic Apoptotic Pathway
01:15Drugs that Stabilize Microtubules
01:46Electron Transport Chain: Complex I and II
ROS generation is regulated and maintained at moderate levels necessary...