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The Potent Antioxidant 3,5-Dihydroxy-4-Methoxybenzyl Alcohol Reveals Anticancer Activity by Targeting Several
Masayoshi Yamaguchi1, Kenji Yoshiike2, Hideaki Watanabe2
1Cancer Biology Program, University of Hawaii Cancer Center, The University of Hawaii at Manoa, Honolulu, Hawaii, USA.
Abstract:
Human breast cancer is the leading cause of cancer-related death in women. Bone metastatic human breast cancer MDA-MB-231 cells are triple negative. The novel marine factor 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA), a potent antioxidant, has been shown to prevent oxidative stress by scavenging free radicals in cells. This study investigates the effects of DHMBA on MDA-MB-231 cells in vitro. MDA-MB-231 cells were cultured with DHMBA (0.1-100 μM). DHMBA blocked the growth and stimulated the death of MDA-MB-231 cells, resulting in reduced cell numbers. DHMBA treatment decreased PI3-kinase 100α, Akt, MAPK, phosphor-MAPK, and mTOR and increased p53, p21, and Rb, which are suppressors in cell growth. DHMBA inhibited metastatic activity, including adhesion and migration of MDA-MB-231 cells. Coculture with MDA-MB-231 cells resulted in decreased growth and stimulated death of osteoblastic MC3T3-E1 cells and macrophage RAW264.7 cells, suggesting that cancer cells affect the bone microenvironment. Production of TNF-α, which is the mediator in the bone microenvironment, in MDA-MB-231 cells was inhibited by DHMBA treatment. Crosstalk between cancer cells and cells in the bone microenvironment was blocked by culture with DHMBA. DHMBA may inhibit the activity of triple-negative human breast cancer cells, providing a useful tool for the treatment of breast cancer.
Insights
The marine compound DHMBA inhibits triple-negative breast cancer cell growth and metastasis. It also impacts the bone microenvironment, suggesting potential as a breast cancer treatment.
Area of Science:
- Oncology
- Marine Biology
- Biochemistry
Background:
- Human breast cancer is a leading cause of cancer-related death in women.
- Triple-negative breast cancer (TNBC) is aggressive and lacks targeted therapies.
- Oxidative stress plays a role in cancer progression.
Purpose of the Study:
- To investigate the anti-cancer effects of the marine compound 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA) on TNBC cells in vitro.
- To explore DHMBA's impact on cell growth, death, signaling pathways, and metastatic potential.
- To assess DHMBA's influence on the bone microenvironment and cancer cell-host interactions.
Main Methods:
- MDA-MB-231 (TNBC) cells were cultured with varying concentrations of DHMBA.
- Cell proliferation, viability, and apoptosis were assessed.
- Key signaling proteins (PI3K/Akt, MAPK, mTOR, p53, p21, Rb) were analyzed.
- Cell adhesion and migration assays were performed.
- Co-culture experiments with osteoblastic and macrophage cells were conducted.
- Tumor necrosis factor-alpha (TNF-α) production was measured.
Main Results:
- DHMBA significantly reduced MDA-MB-231 cell growth and induced cell death.
- DHMBA modulated key signaling pathways, decreasing pro-growth factors and increasing tumor suppressors.
- DHMBA inhibited the adhesion and migration capabilities of TNBC cells.
- DHMBA reduced the viability of bone cells (MC3T3-E1) and macrophages (RAW264.7) when co-cultured with cancer cells.
- DHMBA suppressed TNF-α production in cancer cells, disrupting the bone microenvironment crosstalk.
Conclusions:
- DHMBA exhibits potent anti-cancer activity against triple-negative breast cancer cells in vitro.
- DHMBA interferes with critical cancer cell signaling and metastatic processes.
- DHMBA modulates the bone microenvironment, suggesting a dual mechanism of action.
- DHMBA represents a promising novel therapeutic agent for breast cancer treatment.
