Fluoride and aluminum release from restorative materials using ion chromatography

OBJECTIVE: The aim of this study was to determine the amounts of fluoride and aluminum released from different restorative materials stored in artificial saliva and double-distilled water. Material and METHODS: Cylindrical specimens (10 x 1 mm) were prepared from 4 different restorative materials (Kavitan Plus, Vitremer, Dyract Extra, and Surefil). For each material, 20 specimens were prepared, 10 of which were stored in 5 mL artificial saliva and 10 of which were stored in 5 mL of double-distilled water. Concentrations of fluoride and aluminum in the solutions were measured using ion chromatography. Measurements were taken daily for one week and then weekly for two additional weeks. Data were analyzed using two-way ANOVA and Duncan's multiple range tests (

Caspases activities in TNF-α applied HepG2 hepatocellular carcinoma cell

Amaç: Tümör nekroz faktörü (TNF), hücre sağkalımı, proliferasyon, farklılaşma, inflamasyon, bağışıklık ve apoptoz gibi hücresel olaylarda anahtar rol oynar. Tümör sitotoksisitesindeki etkisinden dolayı Tümör nekroz faktörü olarak adlandırılmasına rağmen, TNF geniş bir yelpazede birçok hastalıkla ilişkilendirilmiştir. Çalışmada, hepatoselüler karsinoma hücrelerinde TNF-α'nın kaspaz 1, 3 ve 9 enzim aktiviteleri üzerindeki etkilerini belirlemek amaçlanmıştır. Materyal ve metod: Çalışmada TNF-α uygulanmayan (kontrol) ve 24 saat boyunca TNF-α uygulanan hepatoselüler karsinoma hücre hattı HepG2 hücreleri kullanılmıştır. TNF-α'nın kaspaz 1, kaspaz 3 ve kaspaz 9 enzim aktiviteleri üzerindeki etkileri kolorimetrik olarak ticari kit ile gerçekleştirilmiştir. Bulgular: TNF-α uygulanan HepG2 hücrelerinde kaspaz 1 ve kaspaz 3 enzim aktivitelerinde kontrol grubuna göre anlamlı artış gözlenmiştir (p<0,05). Sonuç: TNF-α inflamatuar hücreler tarafından salınan pro-inflamatuvar bir sitokindir. Bu mekanizma, yangıya bağlı şekillenen karsinogenezde rol oynayabilir. TNF, hem tümör oluşumunu destekleyebilir hem de kanser hücrelerini öldürücü etki gösterebilir. Sunulan bulgular, TNF-α uygulanan HepG2 hücrelerinde kaspaz bağlımlı hücre ölümünün meydana geldiğini ortaya koymaktadır.Purpose: Tumor necrosis factor (TNF) plays a key role in cellular events such as cell survival, proliferation, differentiation, inflammation, immunity, and apoptosis. Although named Tumor necrosis factor for its tumor cytotoxicity, TNF has been implicated in a wide spectrum of other diseases. The aim of the present study is to determine the effects of TNF-α on caspase 3, 9, and 1 enzyme activities in HepG2 cells. Materials and methods: Hepatocellular carcinoma cell line HepG2 was used and cells were cultured in the absence (control) or presence of TNF-α for 24 h. The effect of TNF-α on caspase 3, caspase 9, and caspase 1 enzyme activities in hepatocarcinoma cells were examined in TNF-α treated and control cells using colorimetric assay kits. Results: There were significant increases in caspases 1 and 3 levels in TNF-α treated HepG2 cells compare to control cells. Conclusions: TNF-α is a pro-inflammatory cytokine, secreted by inflammatory cells. This mechanism may be involved in inflammation-associated carcinogenesis. TNF could act both as tumor promoter, and cancer killer. Presented findings suggest that caspases-dependent cell death occurs in TNF-α applied HepG2 cells

Ankara ve çevresinde kuzularda zeranol artık düzeyleri ile serum testesteron, östrojen ve progesterone düzeyleri

Zearalenone'un sentetik bir derivesi olan Zeranol, koyun ve sığırlarda besi performansını artırmak amacıyla anabolik madde olarak kullanılmıştır. Avrupa Birliği ülkelerinde ve Türkiye'de tüketiciye ulaşabilecek kalıntıları nedeniyle hayvanlarda kullanımı yasaklanmıştır. Yasal olmayan kullanımlarında, verilen miktar ve süre bilinmediğinden tesbiti güçtür. Bunun yanında hayvanın yası, cinsi ve bireysel farklılıklar da zeranol'ün vücuttan uzaklaşmasında etkilidir. Bu nedenle hızlı, duyarlı teknikler kullanılmalıdır ve Radioimmunoassay, referans metot olarak önerilmektedir. Ankara çevresinde çiftlik ve mezbahalardan toplanan dışkı ve doku örnelerinde zeranol analizleri ile serum örneklerinde testosteron, progesteron ve östrojen hormon analizleri Radioimmunoassay ile yapılmıştır. Toplam 153 kuzu dışkı örneği zeranol yönünden analiz edildi. Kuzularda % 22 zeranol pozitif bulundu.Zeranol is a synthetic derivative of Zearalenone which has been used as an anabolic substance in sheep and cattle to increase growth of zeranol in food producing animals. The usage of zeranol is prohibited in most countries of the European Union and in Turkey. In the illegal use of zeranol it is difficult to determine its presence because the amount of zeranol given and period is not known. As well as this, the age and breed of the animal plus individual variations affect the period of removal of zeranol from the body. Because of this rapid, sensitive and accurate techniques are needed and Radioimmunoassay (RIA) has been proposed as an reference method for anabolic agent residues.Faeces, serum and tissue samples of lambs from Ankara and the surrounding countryside were collected and the analyses of zeranol, oestrogen, progesteron and testosteron were carried out using Radioimmunoassay. A total of 153 faeces samples of lambs collected from Ankara and the surrounding countryside were analysed for the presence of zeranol positive samples for lamb faeces were 22%

The investigation antiproliferative and apoptotic effects of capsaicin and alpha lipoic acid on colon adenocarcinoma cells

WOS: 000431624200026

Antileukemic effects of piperlongumine and alpha lipoic acid combination on Jurkat, MEC1 and NB4 cells in vitro

Aim of Study: This research indicated to evaluate the effects of piperlongumine (PL), a biologically active alkaloid, and alpha lipoic acid (ALA), a naturally occurring cofactor existed in multienzyme complexes regulating metabolism on leukemia cells. Excessive production of reactive oxygen species (ROS) can lead to oxidative stress, a state that has been observed in several hematopoietic malignancies, including acute and chronic myeloid leukemias. The importance of the association between oxidative stress and malignancy is not currently clear; however, there is evidence that tumor.derived ROS may promote cell survival, migration and metastasis, proliferation and even drug.resistance depending on the origin of the cancer. Increased oxidative stress in leukemic cells may represent a potential therapeutic target, although there are differing opinions on whether therapeutic strategies should aim to antagonize or further promote oxidative stress in leukemic cells. Materials and Methods: The effects of PL alone (5, 15, 30 μM) and in combination (30 μ M) with ALA (200 μ M) on Jurkat, NB4 and MEC1 leukemia cell lines were investigated through MTT, caspase-3 and cyclooxygenase-2 (COX-2) activities. Results: Inhibition of COX-2 and the induction of caspase.3 cleavage in Nb4 (acute promyelocytic leukemia) cells were found to be significant following PL application and synergistic effects with combination of ALA (inhibition of COX-2 as 23.74% and 3.55-fold increase of caspase-3). Conclusion: PL and ALA may have a potential value as a therapeutic agent for patients with acute promyelocytic leukemia

The effect of dietary supplementation of natural antioxidants and coated calcium butyrate on carcass traits, serum biochemical parameters, lipid peroxidation in meat and intestinal histomorphology in broilers

The aim of this study was to investigate the effects of vitamin E, grape seed extract and green tea extract with or without supplementation of coated calcium butyrate in broilers based on carcass traits, some biochemical parameters, intestinal histomorphology, and lipid peroxidation in meat. Two hundred fifty-two one-day-old broiler chicks were divided into nine groups, one control and eight experimental. Control group fed only a basal diet (control). The experimental groups' diets contained feed additives as; coated calcium butyrate (CCB), vitamin E (VitE), grape seed extract (GSE), green tea extract (GTE), a combination of vitamin E with coated calcium butyrate (VitE+CCB), grape seed extract with coated calcium butyrate (GSE+CCB), green tea extract with coated calcium butyrate (GTE+CCB), and a combination of grape seed extract, green tea extract, and coated calcium butyrate (GSE+GTE+CCB) respectively. According to the study results; no significant differences were observed in gut histomorphology and serum biochemical parameters. The broilers fed with GSE and GTE with/without CCB had significantly higher hot carcass yield than control, VitE, and VitE+CCB. Furthermore, all groups showed significantly lesser lipid peroxidation in meat than control; however, the VitE group had the lowest malondialdehyde (MDA) levels. It can be concluded that the combination of CCB with natural antioxidants could be used to improve carcass traits and meat antioxidant capacity in broilers

The Effect of Tocopherol-α on the Cell Viability in Caco-2 Cell Line

Tocopherols, the major forms of vitamin E, are a family of fat-soluble phenolic compounds. Each tocopherol contains a chromanol ring system and a phytyl chain containing 16 carbons. Tocopherols, as effective antioxidants, have been proposed to protect against carcinogenesis. Colon carsinoma cell line were treated with tocopherol-α (0, 3.12, 6.25, 12.5, 25, 50, 100, 200 uM). Cell viability and migration were examined. Cell viability was determined MTT assay and cell migration was determined by wound healing assay. Caco-2 cells were treated with for 24 h, 48 h and 72 h incubation. There is a significant decrease was observed at 50, 100 and 200 µM for 48 h and 72 h incubation on cell viability in the MTT assay. Wound healing method observed decrease on migration at 12, 5, 25 and 50 µM in 24 h. These results suggest that tocopherol-α have promising antiproliferative effect on cell viability for research on cancer

The Antiproliferative Effect of Alpha Tocopherol in F98 Cell Culture

Alpha tocopherol is the most common and biologically active form of Vitamin E. The aim of this study was to evaulate the possible antiproliferative effect of alpha tocopherol on F-98 Glioblastoma cells. F-98 glioblastoma cell line was seeded at a density of 50.000/mL per well in 96 well plates in 100 µL medium DMEM. Cells treated with Alpha tocopherol (200,100, 50, 25, 12.5, 6.2, 3.3 µM) for 24 h, 48 h and 72 h incubation. Measurement of Alpha tocopherol treated and control groups’ cell proliferation performed with MTT assay and Wound Healing assay was employed to show migration capacity. MTT Assay data shown are there was significant change in cell viability in 24 h, 48 h and 72 h. However significant decrease was observed at 50, 100 and 200 µM. In the present study, antiproliferative effect of alpha tocopherol was observed via wound healing assay. Our results here show that Alpha Tocopherol maybe a possible avenue for brain cancer treatment