Breast cancer today is the most frequent cancer among women, and the second most common cause of cancer deaths among women. The aim of this study was to synthesize a new benzoxazole derivative, scan it for anti-cancer potential by MTT test using different breast cancer cell lines, and examine its effects on NF-κB and apopitosis-related proteins (APAF-1, cytochrome C, caspase-3, bcl-2) by the western blot method. newly-synthesized benzoxazole compound was applied to breast cancer cell lines (MDA-MB, MCF-7) and its cytotoxicity was measured quantitatively by MTT test. Later, the level of its effects on NF-κB and apopitosis-related proteins (APAF-1, cytochrome C, caspase-3, bcl-2) were examined by the western blot method. In our study, the structure of the synthesized new 5-[4-chlorobutanamido]-2-(p-methylphenyl)benzoxazole was proved by elemental analysis, 1H NMR and mass spectroscopy analysis methods. When the toxic effects of the application of the compound on the cell lines was examined by MTT, it had a greater toxic effect on MCF-7 when compared with MDA-MB, and IC50 levels were lower. When the protein was examined in immunohistochemistry with regard to VEGF, eNOS and TUNEL, it was observed that it caused a reduction in VEGF and an increase in eNOS and TUNEL. In the assay of the proteins by western blot, when benzoxazole compound was added to the MDA and MCF-7 cell line, there was no difference from the control group in Apaf-1 and BCL-2 levels, but a reduction was observed in caspase and Nfkβ levels compared with the control group. When the compound was added to the MDA-MB cell line, an increase was shown in the Cytochrome C level compared to the control group, but no difference was seen in the MCF-7 cell line. It is felt that this synthesized new benzoxazole compound increases apopitosis by reducing the activation of Nfkβ, and in this way has shown an effect of inhibiting tumor growth in cancer treatment. In addition, it is felt that this can provide hope in cancer treatment by the improved phase studies.
Key words: Benzoxazole compounds, NF-κB, APAF-1, sitokrom C, caspase-3, bcl-2
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