β-Elemene Triggers Drp1-Dependent Mitochondrial Fission Through CDK1/Cyclin B1 Signaling in Cervical Cancer Cells

Area of Science:

• Cell Biology
• Cancer Research
• Mitochondrial Biology

Background:

• Mitochondrial dynamics (fission/fusion) are crucial for cell survival and metabolism, and are often dysregulated in cancer.
• The sesquiterpene beta-elemene shows anti-tumor potential, but its impact on mitochondrial dynamics in cervical cancer remains unexplored.

Purpose of the Study:

• To investigate if beta-elemene disrupts mitochondrial homeostasis in cervical cancer cells.
• To elucidate the molecular mechanisms underlying beta-elemene's anti-tumor effects on mitochondria.

Main Methods:

• Treatment of HT-3 and Caski cervical cancer cells with beta-elemene.
• Assessment of cell viability, lactate dehydrogenase release, mitochondrial oxidative stress, and respiratory function.
• Analysis of dynamin-related protein 1 (Drp1) phosphorylation and mitochondrial translocation.
• Investigation of cyclin-dependent kinase 1 (CDK1) and cyclin B1 interaction.
• Genetic silencing of CDK1 to evaluate its role in beta-elemene's effects.

Main Results:

• Beta-elemene reduced cervical cancer cell viability and increased cell damage in a dose-dependent manner.
• Treatment induced mitochondrial oxidative stress, impaired respiration, and caused significant mitochondrial fragmentation.
• Beta-elemene promoted Drp1 phosphorylation at Ser616 and its mitochondrial translocation via CDK1 activation.

Conclusions:

• Beta-elemene triggers excessive mitochondrial fission and dysfunction in cervical cancer cells.
• The compound activates a novel pathway involving CDK1-dependent Drp1 activation, leading to anti-tumor effects.
• Targeting mitochondrial dynamics with beta-elemene presents a potential therapeutic strategy for cervical cancer.