Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2021Evaluation of Cytotoxic Effect of Onosma armeniacum Extract on Various Cancer Cells
Demir, Selim; Ayazoglu Demir, Elif; Turan, Ibrahim; Özgen, Ufuk
The aim of this study was to investigate the antioxidant properties of the root extract of Onosma armeniacum and its cytotoxic effect against human liver (HepG2), lung (A549) and colon (WiDr) cancer cell lines compared with a normal fibroblast cell line. Antioxidant properties of the extract was determined using the colorimetric methods. The cytotoxic effect of the extract were investigated using MTT assay. The total phenolic content and reducing power values of extract were 26.1 +/- 0.4 mg gallic acid equivalent and 52.6 +/- 1.1 mg trolox equivalent per g sample, respectively. The extract exhibited selective cytotoxic effect in all studied cancer cell lines, especially HepG2 (3.6-fold). The results of this study reveal that O. armeniacum, which has been found to have acceptable antioxidant and cytotoxic effects, should be examined with more comprehensive studies.
- MakaleAçık Erişim2021Investigation of the Cytotoxic Effect of Ethyl Pyruvate on Various Cancer Cell Lines
Ayazoglu Demir, Elif; Demir, Selim; Turan, Ibrahim
Ethyl pyruvate (EP) is a simple aliphatic ester derived from pyruvic acid which is an endogenous metabolite. Although various studies have investigated the antioxidant and anti-inflammatory properties of EP, there has been only limited research into the cytotoxic effect of EP on cancer cells. The aim of this study was to determine the cytotoxic effects of EP on cells representing common cancer types. EP was purchased commercially and intermediate stock solutions were prepared with phosphate buffer saline. The cytotoxic effect of EP on human melanoma (VMM917), cervix (HeLa), breast (MCF-7), lung (A549), liver (HepG2), colon (WiDr) cancer and normal fibroblast (BJ) cells was determined using the MTT assay. Cisplatin was used as a positive control in cytotoxicity experiments. The results showed that EP exhibits selective cytotoxic effect on VMM917 (10.1-fold) and HeLa (3.04-fold) cells compared to BJ cells. This study shows for the first time that EP has a highly selective cytotoxic effect, especially on melanoma and cervix cancer cells. The mechanism of this effect needs to be elucidated by more extensive studies.
- MakaleYalnız künye2019Dimethyl Sulfoxide Extract of Dianthus carmelitarum Induces S Phase Arrest and Apoptosis in Human Colon Cancer Cells
Turan, Ibrahim; Demir, Selim; Aliyazicioglu, Rezzan; Kilinc, Kagan; Ozer Yaman, Serap; Akbulut Cakiroglu, Kubra; Kanbolat, Seyda; Ayazoglu Demir, Elif; Mentese, Ahmet; Aliyazicioglu, Yuksel
Although several studies have investigated the cytotoxic effects of different Dianthus species, there has been only limited research into the cytotoxic effect of Dianthus carmelitarum. The purpose of this research was to evaluate the phenolic characterization and the cytotoxic effect of D. carmelitarum on human colon cancer (WiDr) cells and the possible mechanisms involved. Total polyphenolic contents (TPC) and phenolic characterization of the extract were evaluated using the Folin-Cioceltau method and reversed-phase high performance liquid chromatography (RP-HPLC), respectively. The cytotoxic activity of the extract was determined using the methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay. The mechanism involved in the extract’s cytotoxic effect was then evaluated in terms of apoptosis and the cell cycle using flow cytometry, while mitochondrial membrane potential (MMP) was investigated using the fluorometric method. The TPC value of the extract was 784.8 ± 40.3 mg gallic acid equivalent per 100 g sample, and sinapic acid and benzoic acid were detected as major phenolics in the extract. D. carmelitarum extract exhibited a selective cytotoxic effect (3.6-fold) on WiDr cells compared to normal colon cells. The extract induced cell cycle arrest at the S phase and apoptosis via reduced MMP in WiDr cells. Phytomedical and nutraceutical applications of D. carmelitarum may represent promising approaches in the treatment of cancer.
- MakaleYalnız künye2017Morus Rubra Extract Induces Cell Cycle Arrest and Apoptosis in Human Colon Cancer Cells Through Endoplasmic Reticulum Stress and Telomerase
Demir, Selim; Turan, Ibrahim; Aliyazicioglu, Yuksel; Kilinc, Kagan; Yaman, Serap Ozer; Ayazoglu Demir, Elif; Arslan, Ayse; Mentese, Ahmet; Deger, Orhan
Many studies have reported cytotoxic effects of different Morus species, but there have been only limited studies on the cytotoxic effect of Morus rubra. The aims of this study were to evaluate the cytotoxic effect of dimethyl sulfoxide extract of M. rubra and to investigate, for the first time, its probable cytotoxic activity in human colon cancer (WiDr) cells, together with the mechanism involved. The cytotoxic activity of extract was determined using MTT assay. The mechanism involved in the cytotoxic effect of extract was then evaluated in terms of apoptosis, and the cell cycle using flow cytometry, mitochondrial membrane potential (MMP) was investigated using the fluorometric method, and expression levels of telomerase and C/EBP homologous protein (CHOP) were investigated using reverse-transcription PCR (RT-PCR). M. rubra extract exhibited moderate selective cytotoxicity on colon cancer cells compared with fibroblast cells. Extract induced cell cycle arrest at the G1 phase and apoptosis via reduced MMP in WiDr cells. Additionally, M. rubra extract significantly repressed telomerase and induced CHOP expressions in WiDr cells. Our results demonstrate that targeting telomerase and endoplasmic reticulum stress represents a promising strategy in colon cancer therapy, and M. rubra may have considerable potential for development as a novel natural product-based anticancer agent.