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Evaluation of cytotoxicity and anticarcinogenic potential of Mentha leaf extracts
Deepika Jain1, Neelam Pathak, Saba Khan
1Bhopal Memorial Hospital & Research Centre, Bhopal, India.
Abstract:
We examined the possible molecular mechanisms underlying the cytotoxicity and anticarcinogenic potential of Mentha leaf extracts (petroleum ether, benzene, chloroform, ethyl acetate, methanol, and water extracts) on 6 human cancer (HeLa, MCF-7, Jurkat, T24, HT-29, MIAPaCa-2) and normal (IMR-90, HEK-293) cell lines. Of all the extracts tested, chloroform and ethyl acetate extracts of M piperita showed significant dose- and time-dependent anticarcinogenic activity leading to G1 cell cycle arrest and mitochondrial-mediated apoptosis, perturbation of oxidative balance, upregulation of Bax gene, elevated expression of p53 and p21 in the treated cells, acquisition of senescence phenotype, while inducing pro-inflammatory cytokines response. Our results provide the first evidence of direct anticarcinogenic activity of Mentha leaf extracts. Further, bioassay-directed isolation of the active constituents might provide basis for mechanistic and translational studies for designing novel anticancer drugs to be used alone or as adjuvant for prevention of tumor progression and/or treatment of human malignancies.
Insights
Mentha leaf extracts, specifically chloroform and ethyl acetate, demonstrate direct anticancer effects by inducing cell cycle arrest and apoptosis. These findings support Mentha as a source for novel anticancer drug development.
Area of Science:
- Pharmacology
- Molecular Biology
- Phytochemistry
Background:
- Natural products are a rich source of potential therapeutic agents.
- Mentha species are traditionally used for various medicinal purposes.
- Understanding the molecular mechanisms of plant-derived compounds is crucial for drug discovery.
Purpose of the Study:
- To investigate the cytotoxic and anticarcinogenic potential of various Mentha leaf extracts.
- To elucidate the molecular mechanisms behind the observed anticancer activities.
- To explore the therapeutic possibilities of Mentha extracts in cancer treatment.
Main Methods:
- Screening of six Mentha leaf extracts (petroleum ether, benzene, chloroform, ethyl acetate, methanol, water) against six human cancer cell lines and two normal cell lines.
- Dose- and time-dependent cytotoxicity assays.
- Analysis of cell cycle progression, apoptosis induction, oxidative balance, gene expression (Bax), protein expression (p53, p21), and cytokine response.
Main Results:
- Chloroform and ethyl acetate extracts of Mentha piperita exhibited significant dose- and time-dependent anticarcinogenic activity.
- These active extracts induced G1 cell cycle arrest and mitochondrial-mediated apoptosis.
- Perturbation of oxidative balance, upregulation of Bax, elevated p53 and p21 expression, senescence induction, and pro-inflammatory cytokine response were observed.
Conclusions:
- Mentha leaf extracts, particularly chloroform and ethyl acetate fractions, possess direct anticarcinogenic properties.
- The observed effects are mediated through multiple molecular pathways including cell cycle arrest, apoptosis, and modulation of key regulatory proteins.
- These findings provide a basis for further research into Mentha-derived compounds as novel anticancer therapeutics or adjuvants.
