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Pyrones Isolated from Annona Acutiflora Exhibit Promising Cytotoxic Effects on Cancer Cell Lines
Diogo Folly1,2,3,4, Samille Candido da Silva5,6, Gabriela Dinis3
1Laboratório de Tecnologia de Produtos Naturais, LTPN, Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal Fluminense, Rua, Mario Viana, 523, CEP: 24241-000, Santa Rosa, Niterói, RJ, Brazil.
Abstract:
This work discusses the ongoing challenge of cancer, focusing on therapy issues such as chemotherapy resistance and adverse drug effects. It emphasizes the need for new anticancer agents with improved efficacy and fewer side effects, exploring natural products from plant sources. The Annonaceae family, specifically the Annona genus, is highlighted for its medicinal properties, including anti-inflammatory and anticancer effects. The study focuses on the isolation and elucidation of the substances present in Annona acutiflora leaves. The methodology involves chromatographic and spectroscopy techniques. The isolated compounds, (6S)-5'-oxohepten-1'E,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (1), (6R)-5'-oxohepten-1'Z,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (2) and (6R)-5'-oxohepten-1'Z,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (3) were investigated for cytotoxicity assays on cancer cell lines and normal cells. Results show promising cytotoxic activity, particularly with compound 3, demonstrating potential activity against oral cancer (43.18 μM), hepatocarcinoma (17.24 μM), melanoma (5.39 μM), and colon cancer (59.03 μM). The compound outperforms carboplatin in selectivity against oral cancer (S. I. 2.15) and melanoma (S. I. 17.22). The study concludes by suggesting the potential of these α-pyrones as effective and less toxic alternatives for cancer therapy.
Insights
Researchers explored Annona acutiflora leaf compounds for new cancer treatments. Compound 3 showed significant cytotoxic activity against various cancer cells, offering a promising, less toxic alternative to chemotherapy.
Area of Science:
- Phytochemistry
- Pharmacology
- Natural Products Chemistry
Background:
- Cancer therapy faces challenges with chemotherapy resistance and adverse drug effects.
- Natural products, particularly from the Annonaceae family, offer potential for novel anticancer agents.
- Annona acutiflora is a plant species known for its medicinal properties.
Purpose of the Study:
- To isolate and identify compounds from Annona acutiflora leaves.
- To evaluate the cytotoxic activity of isolated compounds against various cancer cell lines and normal cells.
- To assess the potential of these compounds as anticancer therapeutics.
Main Methods:
- Phytochemical analysis involving chromatographic and spectroscopic techniques for compound isolation and structure elucidation.
- Cytotoxicity assays were performed on multiple cancer cell lines (oral, hepatocarcinoma, melanoma, colon) and normal cells.
- Selectivity index (SI) was calculated to compare compound efficacy against cancer cells versus normal cells.
Main Results:
- Three α-pyrone compounds were isolated: (6S)-5'-oxohepten-1'E,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (1), (6R)-5'-oxohepten-1'Z,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (2), and (6R)-5'-oxohepten-1'Z,3'E-dienyl)-5,6-dihydro-2H-pyran-2-one (3).
- Compound 3 exhibited significant cytotoxic activity against oral cancer (43.18 μM), hepatocarcinoma (17.24 μM), melanoma (5.39 μM), and colon cancer (59.03 μM).
- Compound 3 demonstrated superior selectivity against oral cancer (SI = 2.15) and melanoma (SI = 17.22) compared to carboplatin.
Conclusions:
- The isolated α-pyrones from Annona acutiflora possess significant cytotoxic potential against cancer cell lines.
- Compound 3 shows particular promise as an effective and potentially less toxic anticancer agent.
- These findings suggest that Annona acutiflora-derived compounds could serve as valuable leads for developing novel cancer therapies.
