Sürdürülebilir Kalkınma Amaçları
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- MakaleAçık Erişim2016Effect of Turkish pollen and propolis extracts on caspase-3 activity in myeloid cancer cell lines
Uçar, Meltem; Değer, Orhan; Gerigelmez, Asuman Yiğit; Cengiz, Sevil; Barlak, Yaşam; Ovalı, Ercüment
Purpose: To investigate the apoptosis-inducing capacity of dimethyl sulfoxide (DMSO) extracts of bee pollen and propolis in HL-60 Myeloid Cancer Cell Lines. Methods: DMSO extracts of pollen and propolis were incubated separately with HL-60 cells, and caspase-3 activity evaluated. In order to determine the cell cycle characteristics of HL-60 cells with and without extracts of pollen and propolis, the cells were analysed using flow cytometry. Results: The DMSO extract of propolis (0.5 mg/mL) increased apoptosis from undetectable levels to 60.1%, while maintaining cell viability. The DMSO extract of pollen (2 mg/ml) increased apoptosis from undetectable levels to 52.2% while decreasing cell viability by 62%. Caspase-3 activity in HL-60 cells incubated with DMSO extracts of pollen and propolis were 3.6-to 12-fold higher than in controls. Conclusion: Turkish pollen and propolis individually increase apoptosis and the activity of caspase-3 in HL-60 cells. This finding indicates that bee products may have beneficial effects in the treatment of cancer.
- MakaleAçık Erişim2014Is the combined use of insulin resistance indices, Including adipokines, more reliable in metabolic syndrome?
Kural, Birgül; Değer, Orhan; Erem, Cihangir; Balaban Yücesan, Fulya; Aliyazicioğlu, Rezzan; Barlak, Yaşam
Background/aim: To determine the levels of adipokines (leptin, adiponectin, resistin, and visfatin) and the indices of insulin sensitivity/ resistance, and to examine the relationship among them in patients with metabolic syndrome (MetS).; Materials and methods: The study groups included 45 subjects with MetS (31 women/14 men), and 45 sex- and age-matched non-MetS healthy volunteers (31 women/14 men). The levels of adipokines were determined by enzyme-linked immunosorbent assay.; Results: The levels of leptin and visfatin were significantly higher in the MetS than in the non-MetS subjects (P < 0.01). There was no difference in adiponectin levels in subjects with and without MetS (P = 0.052). Similarly, resistin did not show any statistically significant difference. A statistically significant positive correlation of leptin with insulin levels was observed, while negative correlations of visfatin levels with age, and resistin levels with the ratio of adiponectin to leptin, were found in the MetS (P < 0.05). The combination of adipokines, insulin resistance-sensitivity parameters, and MetS criteria parameters gave more signifcant differences than a single parameter.; Conclusion: Since the parameters mentioned above might affect, interact with, and/or interfere with each other, the combinations of these parameters might give more reliable results to evaluate the insulin resistance/sensitivity in MetS patients.
- MakaleAçık Erişim2011Effect of Turkish propolis extracts on proteome of prostate cancer cell line
Barlak, Yaşam; Deǧer, Orhan; Çolak, Meltem; Karatayli, Senem C.; Bozdayi, Abdurrahman M.; Yücesan, Fulya
Background: Propolis is a natural, resinous hive product that has several pharmacological activities. Its composition varies depending on the vegetation, climate, season and environmental conditions of the area from where it was collected. Surface enhanced laser desorption ionization time of flight mass spectrometry (SELDI-TOF MS) is a proteomic approach which has been used in cancer proteomics studies. Prostate cancer is one of the most commonly diagnosed cancers in men. It has shown that nutritional supplements rich in polyphenolic compounds such as propolis play a significant role in prostate cancer chemoprevention. The aim of this study is to evaluate if protein expression profile in PC-3 prostate cancer cell lines could be differentiated when incubated with dimethyl sulfoxide and water extracts of Turkish propolis.Results: The antioxidant potentials of dimethyl sulfoxide and water extracts of propolis were found in correlation with the amount of total phenolic compounds of them. Dimethyl sulfoxide and water extracts of propolis of 20 μg/mL reduced the cell viability to 24.5% and 17.7%, respectively. Statistically significant discriminatory peaks between control PC-3 cells and dimethyl sulfoxide extract of propolis-treated PC-3 cells were found to be the proteomic features at m/z 5143, 8703, 12661, 20184 and 32794, detected by CM10 ProteinChip, and the peak at m/z 3772, detected by Q10 ProteinChip. Between control PC-3 cells and water extract of propolis-treated PC-3 cells, statistically significant discriminatory peaks were found to be the proteomic features at m/z 15846, 16052 and 24658, detected by CM10 ProteinChip and the peaks at m/z 10348, 10899 and 11603, detected by Q10 ProteinChip.Conclusions: It was concluded that dimethyl sulfoxide and water extracts of Turkish propolis may have anti-proliferative activity through differentiating protein expression profile in PC-3 prostate cancer cell lines along with their antioxidant capacity.