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Apigenin as a Multitarget Anticancer Agent: Coordinated Inhibition of EGFR/MAPK and PI3K/Akt Signaling in Hematologic
Hatice Terzi1, Şeyma Taştemur2, Ayşegül Öztürk3
1Department of Internal Medicine, Department of Hematology, Faculty of Medicine, Sivas Cumhuriyet University, 58140 Sivas, Türkiye.
Abstract:
Hematologic malignancies are driven by dysregulated growth and survival signaling pathways that promote proliferation, treatment resistance, and disease progression. Naturally derived compounds targeting multiple oncogenic pathways with low toxicity have gained interest. Apigenin, a dietary flavonoid, shows anticancer activity in solid tumors, but its molecular effects in hematologic malignancies remain unclear. The antineoplastic effects of apigenin were evaluated in K562 (chronic myeloid leukemia) and DOHH2 (B-cell lymphoma) cell lines. Cell viability was assessed using the CCK-8 assay. L929 (mouse fibroblast) cells were included to evaluate selectivity. EGFR, MAPK, PI3K, NF-κB, caspase-3, and caspase-7 levels were measured by ELISA. Apoptosis and cell cycle distribution were analyzed by flow cytometry. Apigenin reduced cell viability in a dose-dependent manner, with IC50 values of 84.14 μM (K562) and 70.11 μM (DOHH2). It suppressed EGFR, MAPK, PI3K, and NF-κB signaling and increased the caspase-3 and caspase-7 levels (p < 0.001). Flow cytometry showed S-phase arrest and increased apoptosis. L929 cells showed limited reduction in viability at higher concentrations. Apigenin exerts antiproliferative and pro-apoptotic effects via inhibition of the EGFR/MAPK and PI3K/Akt pathways and activation of caspase-mediated apoptosis. Lower sensitivity in L929 cells suggests relative selectivity, supporting further in vivo and clinical studies.
Insights
Apigenin, a natural flavonoid, effectively reduced cancer cell viability in leukemia and lymphoma models. It suppressed key cancer growth pathways and induced apoptosis, showing promise for hematologic malignancies.
Area of Science:
- Oncology
- Molecular Biology
- Natural Products Chemistry
Background:
- Hematologic malignancies involve aberrant growth and survival signaling pathways.
- Dietary flavonoids like apigenin are explored for anticancer potential due to low toxicity.
- Apigenin's specific molecular mechanisms in blood cancers are not well-defined.
Purpose of the Study:
- To investigate the antineoplastic effects of apigenin in chronic myeloid leukemia (K562) and B-cell lymphoma (DOHH2) cell lines.
- To elucidate the molecular pathways targeted by apigenin in these hematologic cancer models.
- To assess the selectivity of apigenin using mouse fibroblast (L929) cells.
Main Methods:
- Cell viability assessed via CCK-8 assay.
- Signaling pathway analysis (EGFR, MAPK, PI3K, NF-κB) using ELISA.
- Apoptosis and cell cycle distribution analyzed by flow cytometry.
- Selectivity evaluated using L929 cells.
Main Results:
- Apigenin demonstrated dose-dependent cytotoxicity with IC50 values of 84.14 μM (K562) and 70.11 μM (DOHH2).
- Apigenin suppressed EGFR, MAPK, PI3K, and NF-κB signaling pathways and activated caspase-3 and caspase-7.
- Apigenin induced S-phase cell cycle arrest and apoptosis, with minimal impact on L929 cells.
Conclusions:
- Apigenin exhibits antiproliferative and pro-apoptotic effects in leukemia and lymphoma cells.
- Inhibition of EGFR/MAPK and PI3K/Akt pathways and activation of caspase-mediated apoptosis underlie apigenin's action.
- Apigenin's relative selectivity warrants further investigation in vivo and clinical trials for hematologic malignancies.
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