Browsing by Author "Korkmaz, Mehmet"

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Citation - WoS: 7
An in Vitro Study in Which New Boron Derivatives Maybe an Option for Breast Cancer Treatment
(Kare Publ, 2019) Simsek, Fatma; Inan, Sevinc; Korkmaz, Mehmet
Objectives: We aimed to investigate the distribution of immunoreactivities of vascular endothelial growth factor (VEGF), endothelial nitric oxide synthase (eNOS), and inducible NOS (iNOS) on breast cancer cells in response to treatment with boron derivatives. Methods: We initially analyzed the cytotoxic effect and IC50 value of boron by MTT assay. For the evaluation of the angiogenesis, expression level of antibodies was detected to following boron derivatives such as boric acid, boron penta (BP), and T-Boron (DPD) in the absence of boron treatment using the indirect immunohistochemical method.The evaluation of these staining was done using the H-scoring system. Results: It was found that immunoreactivities of VEGF, eNOS, and iNOS increased on control compared to those of the cells of MDA-MB231 human breast cancer cell line. Following boron derivatives treatment, it was observed that they were inhibited the VEGF/NOS labeling in MDA-MB-231 breast cancer cells. Conclusion: The present data suggest that BP, especially DPD, inhibits the angiogenesis of breast cancer cells through VEGF pathway. From this point, these boron derivatives may provide a novel therapeutic approach for breast cancer treatment.
Citation - WoS: 10
Citation - Scopus: 11
A Study on the Anticarcinogenic Effects of Calcium Fructoborate
(Springernature, 2017) Tepedelen, Burcu Erbaykent; Korkmaz, Mehmet; Tatlisumak, Ertugrul; Uluer, Elgin Tukoz; Olmez, Ercument; Degerli, Ismail; Soya, Elif
Evidences about the preventive and therapeutic effects of boron compounds on cancer have been increasing in the last years. Although calcium fructoborate (CaFB) is used as a nutritional supplement, data about its preventive and therapeutic effects on neoplastic transformations are limited. In the present study, the various concentrations of CaFB were applied to the MDA-MB-231 metastatic breast cancer cell line. First, we examined the cytotoxic effect and IC50 value of CaFB by MTT assay. For the evaluation of the DNA damage, apoptosis and metastatic potential, expression levels of ATM, pATM, PARP, p53, p-p53, caspase-3, caspase-9, and VEGF were investigated by using immunoblotting and immunohistochemical methods. Cell viability was significantly reduced at 50 mu M CaFB treatment. pATM, p-p53, and caspase-9 levels increased significantly in all groups; furthermore, there was approximately 12.5-, 2.4-, and 10.7-fold increase, respectively, for 100 mu M CaFB treatment. ATM and p53 levels did not change with CaFB treatment, but PARP levels significantly 2.5-fold decreased. While VEGF immunoreactivity decreased in all groups, significant increase in caspase-3 immunoreactivity was observed only in the group treated with 50 mu M CaFB ( p < 0,001). Our results imply that CaFB may have therapeutic potential as well as preventive benefits in cancer.