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    Antioxidant activities of inula viscosa extract and curcumin on U87 cells induced by beta-amyloid
    (Cukurova Univ, Fac Medicine, 2021) Alizade, Ares; Ozbolat, Guluzar
    Purpose: The aim of this study was to investigate the effects of Inula viscosa extract and Curcumin on the U87 (human astrocytoma cell line) treated with amyloid-beta (A beta), which is the Alzheimer's disease (AD) model cell line. Materials and Methods: Firstly, the cytotoxic potential of inula and curcumin was investigated in the U87 cells by the colorimetric MF1 (3-4,5-dimethyl-thiazolyl-2,5-diphenyltetrazolium bromide) assay. Then, the amount of Total Glutathione, Malondialdehyde (MDA), Glutathione reductase (GR) activities were investigated. ELISA test was used to examine the expression and activity of cleaved Bax and Bcl-2 proteins in the Inula viscosa and Curcumin treated U87 cell lines. Results: Inula viscosa and Curcumin treatment reduced cell death caused by amyloid-B in cells. It also reduced oxidative stress caused by amyloid-B, while reducing the activation of the proapoptotic protein Bax, and Bcl-2. Conclusion: Our results suggest that inula viscosa may represent a new approach in the treatment of Alzheimer's.
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    In vitro apoptotic and antiproliferative effects of propranolol on human breast cancer cells
    (Natl Inst Science Communication-Niscair, 2024) Alizade, Ares; Terzi, Menderes Yusuf
    Breast cancer is an issue of concern with increasing incidence among women worldwide. Propranolol, as an antihypertensive drug, exerts anticancer effects too. We conducted this study to analyze the in vitro apoptotic and antiproliferative effects of propranolol in human MCF-7 breast cancer cells. MCF-7 cells were seeded into 6 -well plates and treated with 50 mu L propranolol for 24 hours. After cell homogenization, the levels of pro-apoptotic proteins BCL2 associated X (BAX), apoptosis inducing factor (AIF), C/-EBP homologous protein (GADD153), and glucose -regulated protein 78 (GRP78), anti-apoptotic protein BCL2 apoptosis regulator (BCL-2), and cycle -regulator WEE1 G2 checkpoint kinase (WEE1) were measured with ELISA. Propranolol significantly upregulated pro-apoptotic proteins AIF, BAX, GADD153, and GRP78 while downregulated anti-apoptotic protein BCL2. The level of WEE1, as the main regulatory cell cycle protein at the G2/M checkpoint, significantly increased after propranolol treatment. Propranolol inhibited the proliferation of MCF-7 human breast cancer cells by upregulating pro-apoptotic factors AIF, BAX, GADD153 and GRP78 and by downregulating antiapoptotic BCL2. Elevated WEE1 levels after propranolol treatment might lead the tumor cells into a sustained cell -cycle arrest which eventually resulted in caspase-dependent or -independent mitochondrial or endoplasmic-reticulum stress -induced apoptosis. So, propranolol can be utilized as a potential therapeutic agent in breast cancer therapy.
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    IN VITRO STUDIES ON THE PROTECTIVE EFFECT OF TANNIC ACID OF U87 CELLS INDUCED BY BETA-AMYLOID
    (Dokuz Eylul Univ Inst Health Sciences, 2021) Ozbolat, Guluzar; Alizade, Ares
    Background: While the prevalence of Alzheimer's disease continues to increase throughout the twentieth century, the cause and pathology of the disease are not well understood and scientists are seeking treatments for the disease. Tannic acid can be used effectively to treat Alzheimer's disease and seems to be one of the alternative therapeutic strategies in medicine. In this study, we aimed to investigate the effects of tannic acid on the U87 (human astrocytoma cell line) treated with amyloid-beta (A beta), which is the Alzheimer's disease (AD) model cell line. Materials and Methods: In the study; three groups were formed as the control group, the A beta group, and the A beta + tannic acid group obtained by adding tannic acid to the A beta group. Firstly, the cytotoxic potential of TA in U87 cells was investigated by the colorimetric MTT (3-4,5-dimethyl-thiazolyl-2,5 diphenyltetrazolium bromide) test. To determine the antioxidant status in the cell line treated with tannic acid, to examine the effects of total oxidant status (TOS), superoxide dismutase (SOD), total antioxidant status (TAS) and catalase (CAT) activities, were measured by the ELISA method. Results: In our study, the viability and proliferation of the cell decreased in U87 cells treated with amyloidB compared to the control group, but tannic acid increased cell viability and proliferation when compared with the group treated with amyloid-B. When compared to the control group, the TAS, SOD, and CAT levels were significantly decreased in the U87 cell line exposed to A beta; TOS levels were found to increase significantly. Conclusions: In in vitro experiments, we determined that tannic acid has a protective effect by increasing antioxidant parameters in the amyloid beta-induced cell line.
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    Investigation of apoptotic effects of D-pantothenic acid on PC-3 prostate cancer cells
    (Cukurova Univ, Fac Medicine, 2020) Alizade, Ares; Ozbolat, Guluzar
    Purpose: The anti-inflammatory and antioxidant properties of D-pantothenic acid have been demonstrated and the effects of dexpentanol on inflammatory pathways and apopototic pathways that trigger cell death are of interest. Apoptotic pathways are important in resistance to chemotherapeutics in cancer diseases and in cancer development. Therefore, we planned how treatment of PC-3 human prostate cancer cells with dexpanthenol will affect the levels and activities of apoptotic and inflammation mediators. For this purpose, human prostate cancer cell culture was performed. Materials and Methods: The human prostate cancer cells were treated with dexpentanaol then protein levels and activities of inflammatory and apoptotic pathway mediators such as gadd153, AIF, grp78, bax and bcl-2 in the cells were analyzed by ELISA. Results: The results of our study showed that, Dpantothenic acid did not statisticaly decreased the leves of bax, bcl-2 and grp78 protein expression in PC-3 prostate cancer cells. The effect of D-pantothenic acid on gadd153 and AIF proteins in PC-3 cells was increased but this increased level did not statisticaly significant. Conclusion: Recent studies have demonstrated the potential benefits of anti-inflammatory drugs. Our study showed that D-pantothenic acid had no significant effect on the growth of PC-3 cells and has no significant effect on intracellular apoptotic pathways.