Abstract
Nordy is a chiral compound synthesized based on the structure of a natural lipoxygenase (LO) inhibitor nordihydroguaiaretic acid (NDGA) from plants. The aim of the present study is to investigate the effect of Nordy on malignant human glioma cell responses to chemoattractants and growth promoting signals. We found that Nordy, in a non-cytotoxic concentration range, potently inhibited the chemotaxis and calcium flux of a human glioblastoma cell line U87 induced by a formylpeptide receptor (FPR) agonist, formyl-methionyl-leucyl-phenylalanine (fMLF) and epidermal growth factor (EGF). U87 cells treated by Nordy also showed a significantly impaired proliferation and expression of mRNA for vascular endothelial growth factor (VEGF) induced by fMLF. The chemotactic and proliferation responses of Nordy treated U87 cells to EGF were concomitantly diminished. Further experiments revealed that Nordy did not significantly affect FPR gene expression in U87 cells, but attenuated the activation of a plethora of signaling molecules including ERK1/2, p38, JNK, and Akt when the cells were stimulated by fMLF. EGF-induced EGF receptor phosphorylation was also inhibited in Nordy-treated U87 cells. Moreover, Nordy significantly reduced the tumorigenicity of U87 cells in nude mice. Our results suggest that Nordy is capable of inhibiting glioma cell responses to signals that promote cell motility, growth and production of VEGF. Thus, Nordy may constitute a molecular basis for the development of novel anti-cancer drugs.
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Acknowledgements
The authors thank Dr J. J. Oppenheim for reviewing the manuscript; N. Dunlop for technical support; and Fogle C. and Nolan C. for secretarial assistance. This study was supported in part by fundings from UICC International Cancer Research Technology Transfer Award (No. 661/2002), National Natural Science Foundation of China (NSFC, No.30370552), Key Project of Chongqing Science and Technology Committee (CSTC-2005AA5007), and Federal funds from the National Cancer Institute, National Institutes of Health, under contract No. NO1-CO-12400. Chen JH is supported in part by a fellowship from the Office of the International Affairs, NCI, NIH, USA.
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Chen, Jh., Yao, Xh., Gong, W. et al. A novel lipoxygenase inhibitor Nordy attenuates malignant human glioma cell responses to chemotactic and growth stimulating factors. J Neurooncol 84, 223–231 (2007). https://doi.org/10.1007/s11060-007-9369-4
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DOI: https://doi.org/10.1007/s11060-007-9369-4