Yazar "Vural, Hasibe" seçeneğine göre listele
Listeleniyor 1 - 10 / 10
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Anticancer mechanism of Sinapic acid in PC-3 and LNCaP human prostate cancer cell lines(Elsevier, 2018) Eroglu, Canan; Avci, Ebru; Vural, Hasibe; Kurar, ErcanSinapic acid (SA) is a derivative of hydroxycinnamic acid and found in various vegetables and fruit species. Aim was to evaluate the anticancer effects of SA in PC-3 and LNCaP human prostate cancer cells. The effect of SA on cell viability was determined using XTT assay. Expressions of 8 genes for apoptosis and 6 genes for metastasis were evaluated by qPCR. Caspase-3 activity was determined using caspase-3 colorimetric assay kit. Effect of SA on cell invasion was evaluated with cell invasion assay. The IC50 dose of SA in PC-3 and LNCaP cells was found to be 1000 mu M for 72 h. SA treatment increased the expression of BAX, CASP3, CASP8, CYCS, FAS, TIMP-1 and CDH1 however significantly decreased the expression of MMP-9 in PC-3 cells. In LNCaP cells, the expressions of BAX, CASP3, CASP7 and CYCS were significantly elevated; however, a decrease was seen in the expressions of CDH2, MMP-2 and MMP-9 in the SA treatment. Moreover, SA significantly increased caspase-3 activity and suppressed the cell invasion. In conclusion, it is thought that SA has anticancer effect on prostate cancer cells. However, more detailed studies should be conduct to illuminate molecular mechanism of apoptotic and anti metastatic activity of SA.Öğe Ginnalin A and SB203580 show additive effect on Hep-3B hepatocellular carcinoma cell line(Walter De Gruyter Gmbh, 2019) Vural, Hasibe; Ozden, Pinar; Avci, EbruObjective: Investigation of the anticarcinogenic effects of natural products with low toxicity is very important in the development of new therapeutic strategies against cancer. Ginnalin A (GA) is one of the most important phenolic compounds of Acer genus and its anticancer effect has been shown that in various cancer cell lines. SB203580, a p38 MAPK inhibitor, can inhibit cell proliferation independently of p38 MAPK. The objective of this study was to investigate combination effect of GA and SB203580 on Hep-3B cell line. Material and methods: Cell viability was determined by using XTT method after the treatment with GA, SB203580 and combination of both. Anticarcinogenic effects of GA and SB203580 both in single and in combination have been analyzed with Caspase-3 activity assay and expression levels of important genes involved in cell cycle and apoptosis were evaluated by qPCR. Results: GA and SB203580 have shown additive effect on Hep-3B cells in the combination inhibited 50% of cell viability. And, SB203580 increased the effect of GA on activation of Caspase-3 and expressions of genes important in apoptosis and cell cycle. Conclusion: This study indicates that GA and SB203580 can be an effective for development of new therapeutic strategies in hepatocellular carcinoma.Öğe Ginnalin A and SB203580 show additive effect on Hep-3B hepatocellular carcinoma cell line(Walter De Gruyter Gmbh, 2019) Vural, Hasibe; Ozden, Pinar; Avci, EbruObjective: Investigation of the anticarcinogenic effects of natural products with low toxicity is very important in the development of new therapeutic strategies against cancer. Ginnalin A (GA) is one of the most important phenolic compounds of Acer genus and its anticancer effect has been shown that in various cancer cell lines. SB203580, a p38 MAPK inhibitor, can inhibit cell proliferation independently of p38 MAPK. The objective of this study was to investigate combination effect of GA and SB203580 on Hep-3B cell line. Material and methods: Cell viability was determined by using XTT method after the treatment with GA, SB203580 and combination of both. Anticarcinogenic effects of GA and SB203580 both in single and in combination have been analyzed with Caspase-3 activity assay and expression levels of important genes involved in cell cycle and apoptosis were evaluated by qPCR. Results: GA and SB203580 have shown additive effect on Hep-3B cells in the combination inhibited 50% of cell viability. And, SB203580 increased the effect of GA on activation of Caspase-3 and expressions of genes important in apoptosis and cell cycle. Conclusion: This study indicates that GA and SB203580 can be an effective for development of new therapeutic strategies in hepatocellular carcinoma.Öğe Inhibitory effect of AK-7 mediates by apoptosis, increases DNA fragmentation and caspase-3 activity in human glioblastoma multiforme cells(Bangladesh Pharmacological Soc, 2022) Guclu, Ebru; Ayan, Ilknur Cinar; Vural, HasibeSirtuins (SIRTs) which are nicotinamide adenine dinucleotide (NAD+) dependent class III histondeacetylases have a controversial role in cancer. In this study, the effect of pharmacological inhibition of AK-7, a SIRT2 inhibitor, was investigated in U87 glioblastoma multiforme cells. The cytotoxic effect of AK-7 was evaluated by XTT analysis. After AK-7 treatment, colony forming capacity of cells was determined and apoptosis was evaluated. The expression levels of apoptosis-related genes were determined by qRT-PCR. According to the results, AK-7 inhibited cell proliferation in a dose-and time-dependent manner. After AK-7 treatment, the colony forming capacity of U87 cells was suppressed. And, AK-7 increased apoptosis rate, DNA fragmentation, and caspase-3 activity. According to qRT-PCR, a significant increase was observed in expression levels of apoptosis-related genes. This study revealed that AK-7 inhibits cell proliferation and induces apoptosis in glioblastoma multiforme cells and SIRT2 inhibition can be evaluated as a therapeutic approach in glioblastoma multiforme.Öğe Knockdown of lncRNA HIF1A-AS2 increases drug sensitivity of SCLC cells in association with autophagy(Humana Press Inc, 2021) Guclu, Ebru; Gunes, Canan Eroglu; Kurar, Ercan; Vural, HasibeThe aim of this study was to determine the effect of lncRNA HIF1A-AS2 on autophagy-associated drug resistance in small cell lung cancer (SCLC) cells. The expression of HIF1A-AS2 was silenced by siRNA in doxorubicin-sensitive H69 and doxorubicin-resistant H69AR cells. Then, cytotoxicity, apoptosis and autophagy analyses were carried out in the normoxic and CoCl2-induced hypoxic environment. The effect of HIF1A-AS2 on the expression levels of genes, which are associated with drug resistance and autophagy, was determinated by qRT-PCR analysis. The levels of MRP1, HIF-1 alpha and Beclin-1 were analyzed by western blot method. Knockdown of HIF1A-AS2 increased doxorubicin sensitivity of SCLC cells and decreased autophagy. Knockdown of HIF1A-AS2 has also affected the expression of several genes that will increase drug sensitivity and inhibit autophagy in both cell lines. The levels of HIF-1 alpha and Beclin-1 were decreased in both cell lines by knockdown of HIF1A-AS2. MRP1 expression was decrease in H69AR cells. In addition, CoCl2-induced hypoxic environment decreased in doxorubicin sensitivity of H69 cells, and knockdown of HIF1A-AS2 reversed this effect of hypoxia. Knockdown of HIF1A-AS2 increased drug sensitivity of SCLC cells in relation to autophagy. Therefore, hypoxia-HIF1A-AS2-autophagy interaction is thought to be determinative in drug sensitivity of these cells.Öğe Knockdown of lncRNA ZEB2NAT suppresses epithelial mesenchymal transition, metastasis and proliferation in breast cancer cells(Elsevier, 2021) Gunes, Canan Eroglu; Guclu, Ebru; Vural, Hasibe; Kurar, ErcanBreast cancer is the second most common cause of cancer-related mortality in women. Breast cancer metastasis which usually is observed at the last stage is the major cause of breast cancer-related death. Long non-coding RNAs (lncRNAs) are member of the non-coding RNA family. It is known that lncRNAs have important functions in the genes regulation of different processes and pathways such as EMT (Epithelial mesenchymal transition), metastasis and apoptosis. Therefore, it is inevitable that lncRNAs have potential contribution for the understanding of cancer pathogenesis. lncRNA-ZEB2NAT is the natural antisense transcript of ZEB2. Herein, we investigated the effects of lncRNA-ZEB2NAT on process of EMT, metastasis and apoptosis in MCF7 and MDA-MB231 breast cancer cells. The effect of ZEB2NAT on the expression of important genes in EMT, metastasis and apoptosis, and some protein levels was determined by qRT-PCR and western blot analysis, respectively. The effects of ZEB2NAT on cell proliferation, apoptosis, invasion and colony formation were evaluated using XTT, annexin V, invasion and colony assays, respectively. The ZEB2NAT knockdown caused anti-metastatic and apoptotic effects. The ZEB2NAT knockdown resulted in a decrease in ZEB2 and N-cadherin but an increase in E-cadherin protein levels. In addition, it was determined that ZEB2NAT knockdown significantly decreased cell proliferation and stimulated apoptosis in both cells. It was found that ZEB2NAT knockdown significantly decreased invasion and colony formation in both cells. ZEB2NAT knockdown showed anti-metastatic and apoptotic effect by affecting the important genes in both cells. These results have suggested that ZEB2NAT has an important role in EMT, metastasis and apoptosis in breast cancer and ZEB2NAT knockdown caused significant anti-cancer activities.Öğe Lysates from the probiotic bacterium Streptococcus thermophilus enhances the survival of T cells and triggers programmed cell death in neuroblastoma cells(Humana Press Inc, 2023) Altves, Safaa; Guclu, Ebru; Ayan, Ilknur Cinar; Bilecen, Kivanc; Vural, HasibeNeuroblastoma is the most common brain solid tumor in infancy. Despite the availability of numerous approaches like immunotherapy, surgery, chemotherapy, and radiotherapy, neuroblastoma frequently develops resistance and recurs. Immunotherapy is one of the most promising approaches and PD-L1 antibody blocking is the phenomena used to inhibit PD-1 receptors to increase and improve cytotoxic T cells toward cancer. Numerous studies underlined the critical role of probiotics on immune system development and modulation in addition to possible role in inducing apoptosis in cancer cells. In this study, a Streptococcus thermophilus strain, isolated from a local yogurt, was used as it is considered a potential probiotic due to its tolerance lower pH, bile acid, antibiotic suitability, and blood hemolysis. Our results showed that S. thermophilus lysates played as an immune checkpoint modulator at 25 mu g/ml dose boosting PD-L1 transcripts and protein levels in SH-SY5Y neuroblastoma cell line. Interestingly, co-culture between SH-SY5Y and Jurkat T cells in the presence of blocking PD-L1 antibodies increased Jurkat T-cell viability compering to control without lysate. On the other hand, annexin-V/7-AAD, qPCR and western blot results showed that S. thermophilus lysates at 200 and 400 mu g/ml decreased SH-SY5Y cell viability and increased apoptotic marker genes transcription and caspase-3 and caspase-9 protein expression.Öğe A novel missense mutation that may be associated with the polydactyly in the HOXD13 gene: Q241H(Bayrakol Medical Publisher, 2020) Vural, Hasibe; Avci, Ebru; Eroglu, Canan; Cinar, Ilknur; Yarar, Serhat; Gundeslioglu, OzlemAim: HOX gene cluster which is termed as architectural genes and affects the expression of certain genes on DNA are effective in the development of limb. Therefore, mutations are observed in HOX genes, particularly HOXD13, lead to various congenital limb malformations. In this context, it was aimed to determine the expression level of HOXD13 gene and screening of HOXD13 mutations in patients with congenital lower/upper limb malformations who applied to Clinic of Plastic Reconstructive and Aesthetic Surgery of Meram Faculty of Medicine Hospital in this study. Material and Method: The case group of the study was composed of 20 unrelated patients with congenital lower/upper limb malformations and the control group was composed of 20 healthy individuals. Mutation analysis was performed using NGS and Sanger sequencing methods. The expression level of the HOXD13 gene was determined by the qPCR. Results: According to the qPCR results, in the case group, a 3.43 fold decrease was observed in the expression of HOXD13 gene when compared with the control group. However, this result was not statistically significant. According to NGS and Sanger sequencing results, a 723G> T variation that could lead to amino acid changes (Q241H) and could be defined as a missense mutation was detected in a patient. Discussion: 723G> T variation observed in a patient with a polydactyly anomaly was found in the patient's mother. However, more detailed studies are needed to assess this variation, which are not found in the literature, as a missense mutation in HOXD13 associated with polydactyly.Öğe Piceatannol induces apoptotic cell death through activation of caspase-dependent pathway and upregulation of ROS-mediated mitochondrial dysfunction in pancreatic cancer cells(Springer, 2022) Ayan, Ilknur Cinar; Guclu, Ebru; Vural, Hasibe; Dursun, Hatice GulBackground Piceatannol is a naturally occurring plant-derived phenolic compound (stilbenoid), an analogue of resveratrol. It has been shown that, piceatannol has biological activity properties such as antiproliferative, antioxidative, anti-inflammatory and proapoptotic, in various human cancer studies in vitro and in vivo. Objectives and methods In this study, it was aimed to investigate whether piceatannol induces apoptosis through anticancer activity methods (cell viability, colony formation, annexin-V/7-AAD, ROS (Reactive oxygen species), MMP (Mitochondrial membrane potential), wound healing, invasion assay, RT-qPCR (Real-Time Quantitative Polymerase Chain Reaction), western blotting in PANC-1 and MIA PaCa-2 pancreatic cancer (PC) cell lines. Results According to our results, piceatannol decreased cell viability in a dose and time-dependent manner [the half-maximal inhibitory concentration (IC50): 60 mu M in PANC-1 and IC50: 90 mu M in MIA PaCa-2 cell line at 48 h (h)] and caused significant changes in the expression of apoptosis-related genes and protein. Piceatannol induced apoptosis in PANC-1 and MIA PaCa-2 cells, accompanied by increased ROS production, decreased MMP, and increased Caspase-3-9 activity. Piceatannol also inhibited colony-forming abilities, invasion, and migration of PC cells. Conclusion Our results show that piceatannol has an anti-cancerogenic effect on PANC-1 and MIA PaCa-2 cells, and exerts this effect by suppressing proliferation and inducing apoptosis. Therefore, piceatannol could be considered to be a potential chemotherapeutic agent candidate for the treatment and prevention of PC. [GRAPHICS] .Öğe Tomentosin induces apoptosis in pancreatic cancer cells through increasing reactive oxygen species and decreasing mitochondrial membrane potential(Pergamon-Elsevier Science Ltd, 2022) Gueclue, Ebru; Ayan, Ilknur Cinar; Dursun, Hatice Guel; Vural, HasibeThe aim of this study was to determine possible anticancer effect of tomentosin, a natural sesquiterpene lactone, on pancreatic cancer cells. The cytotoxic effect of tomentosin was determined by XTT analysis. Colony formation and apoptosis analyzes were performed, Reactive oxygen species (ROS) level and change in mitochondrial membrane potential (MMP) were evaluated in control and tomentosin-treated cells. The effect of tomentosin on expression levels of apoptosis-related genes was determined by qRT-PCR and Caspase-3 and Caspase-9 proteins were analyzed by western blot. And, the effect of tomentosin on migration and invasion of cells were evaluated. The IC50 dose of tomentosin was found to be 31.11 mu M in PANC-1 cells and 33.93 mu M in MIA PaCa-2 cells for 48 h. And, treatment of tomentosin at IC50 dose suppressed the colony forming capacity of cells. While tomentosin increased apoptosis rate and ROS production, an decrease was observed in MMP. Tomentosin affected expression level of apoptosis-related genes and increased Caspase-3 and Caspase-9 protein levels. After tomentosin treat-ment, cell migration and invasion were suppressed. As a result, this study reveals that tomentosin has anticancer effects on pancreatic cancer cells, and therefore it predicts that tomentosin can be evaluated as an effective agent against pancreatic cancer.
