Abstract |
The effects of mead acid (MA; 5,8,11-eicosatrienoic acid) on the suppression of breast cancer cell growth and metastasis were examined in vitro and in vivo by using the KPL-1 human breast cancer cell line. MA suppressed KPL-1 cell growth in culture with an IC50 value of 214.2 µM (65.7 µg/ml) for 72 h, and MA significantly suppressed transplanted KPL-1 tumor growth ( tumor volume and tumor weight: 872±103 mm3 and 1,000±116 mg vs. 376±66 mm3 and 517±84 mg) and regional (axillary) lymph node metastasis (67%, 10/15 vs. 10%, 1/10) in female athymic mice fed an MA-rich diet for 8 weeks. Tumor suppression was due to the suppression of cell proliferation. In ELISA, although vascular endothelial growth factor ( VEGF) levels were unchanged, VEGF receptor (VEGFR)1 and VEGFR2 levels were significantly decreased after treatment with a 214.2-µM dose of MA for 72 h; E-cadherin levels were unchanged. As VEGF, VEGFR1 and VEGFR2 expression was co-localized in KPL-1 cells, the mechanism leading to cell growth suppression was VEGF signaling directly to KPL-1 cells by an autocrine process. In contrast, MA did not influence angiogenesis. The mechanisms of action were through VEGF signaling directly to cancer cells.
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Authors | Yuichi Kinoshita, Katsuhiko Yoshizawa, Kei Hamazaki, Yuko Emoto, Takashi Yuri, Michiko Yuki, Nobuaki Shikata, Hiroshi Kawashima, Airo Tsubura |
Journal | Oncology reports
(Oncol Rep)
Vol. 32
Issue 4
Pg. 1385-94
(Oct 2014)
ISSN: 1791-2431 [Electronic] Greece |
PMID | 25109488
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Cadherins
- VEGFA protein, human
- Vascular Endothelial Growth Factor A
- KDR protein, human
- Vascular Endothelial Growth Factor Receptor-1
- Vascular Endothelial Growth Factor Receptor-2
- 8,11,14-Eicosatrienoic Acid
- mead acid
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Topics |
- 8,11,14-Eicosatrienoic Acid
(analogs & derivatives, pharmacology)
- Animals
- Apoptosis
(drug effects)
- Breast Neoplasms
(metabolism)
- Cadherins
(drug effects, metabolism)
- Cell Line, Tumor
- Cell Proliferation
(drug effects)
- Drug Screening Assays, Antitumor
- Female
- Humans
- In Vitro Techniques
- Mice
- Mice, Inbred BALB C
- Neoplasm Transplantation
- Neovascularization, Pathologic
- Vascular Endothelial Growth Factor A
(drug effects, metabolism)
- Vascular Endothelial Growth Factor Receptor-1
(drug effects, metabolism)
- Vascular Endothelial Growth Factor Receptor-2
(drug effects, metabolism)
- Xenograft Model Antitumor Assays
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