OBJECTIVE: The effects of quercetin and selenium on oxidative stress in endometrial adenocarcinoma cells are unclear. In this study, the effects of quercetin and selenium on oxidative stress caused by both hydrogen peroxide and UV radiation in endometrial adenocarcinoma cells were examined. METHODS: The viability of endometrial adenocarcinoma cells cultured in vitro and treated with different concentrations of quercetin and sodium selenite was measured using the MTT assay. Malondialdehyde (MDA) levels were investigated, and expression levels of BAD and p53 genes were analysed using real-time quantitative polymerase chain reaction. Acridine orange/ethidium bromide staining technique was applied to detect apoptosis. Mass attenuation coeffi cient of each quercetin and sodium selenite combinations was evaluated using Monte Carlo simulation. RESULTS: The combination of quercetin and sodium selenite enhanced cell viability, and reduced MDA levels. The expression levels of BAD and p53 genes decreased by combined treatment with quercetin and selenium while showing synergistic effects in terms of gene expression. Fluorescent microscopic examination showed a decrease in apoptotic cells in endometrial adenocarcinoma cells treated with the combination of quercetin and selenium. CONCLUSIONS: For the fi rst time, selenium and quercetin have synergistic cytoprotective and radioprotective effects on oxidative stress caused by hydrogen peroxide in endometrial adenocarcinoma cells for the fi rst time
Mentha pulegium is a medicinally important and well-known plant and used for various purposes such as medicinal, nutritional and spice. We are analyzed to observe the antimicrobial, antioxidant and cytotoxic properties of M. pulegium extracts in this study. The antimicrobial activity of M. pulegium was tested using the agar well method. MIC, MBC and antimicrobial activity were tested on Staphylococcus aureus (ATCC 25923), Klebsiella pneumoniae (ATCC 700603), Escherichia coli (ATCC 25322), Bacillus megaterium (DSM32) and Candida albicans (FMC17) microorganisms. Clindamycin (2 µg) and Amoxicillin (30 µg) were used as positive control and Dimethylsulfoxide (DMSO) as negative control. Cytotoxic activity of extracts at different concentrations obtained from solvents such as acetone, chloroform and methanol using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) test method; µg/ml cytotoxic activity and cell death patterns after exposure to different concentrations of the extracts on human breast cancer (MDA-MB-231), human pancreatic cancer (PANC1), human ovarian cancer (OVCAR3) and human lung cancer (A549) cell lines determined accordingly. As a result, it was determined that M. pulegium extract has a strong antimicrobial activity spectrum and cytotoxic effect.
Günümüzde bazı hastalıkların tedavisinde kullanılan preparatların etken maddeleri tamamen bitkisel kaynaklı olabilmektedir. Bazı bitkilerin veya baharat karışımlarının antiviral, antibakteriyel ve antifungal etkilerinin olduğu bilinmekte olup basit enfeksiyonların tedavi edilmesinde veya koruyucu olarak bağışıklık sisteminin güçlendirilmesinde takviye edici olarak kullanıldığı bilinmektedir. Çalışmada kullanılan zahter de özellikle Güneydoğu Anadolu Bölgesi'nde kahvaltılık olarak tüketilen bir baharat karışımıdır. Bu çalışmada; zahterin Escherichia coli ATCC 25322, Pseudomonas aeruginosa DMS50071 SCOTTA, Klebsiella pneumoniae ATCC 700603'ya karşı oyuk agar yöntemi kullanılarak antimikrobiyal etkileri incelendi. Zahterin etanol ve kloroform ekstreleri 25mg/ml-50mg/ml-75mg/ml-100mg/ml olarak uygulandı. Negatif kontrol için %100 DMSO, pozitif kontrol için de amoksisilin, klindamisin ve penisilin kullanıldı. Sonuçlara göre; Zahter ekstraktının 25mg/ml-50mg/ml-75mg/ml ve 100mg/ml konsantrasyonlarında (zon görülmedi,18mm, 24mm, 27mm) kloroform ile hazırlanan ekstresinde E. coli'ye karşı etki ettiği belirlendi. Zahter ekstraktının 25mg/ml-50mg/ml-75mg/ml ve 100mg/ml konsantrasyonlarında (9mm, 11mm, 14mm, 27mm) kloroform ile hazırlanan ekstresinde P. aeruginosa'ye gelişimini engellediği tespit edildi. Zahter ekstraktının 25mg/ml-50mg/ml-75mg/ml ve 100mg/ml konsantrasyonlarında (13mm, 17mm, zon yok, zon yok) kloroform ile hazırlanan ekstresinde K. pneumoniae karşı etki ettiği gözlendi. Zahter ekstraktının 25mg/ml-50mg/ml-75mg/ml ve 100mg/ml konsantrasyonlarında (13mm, 17mm, zon görülmedi, zon görülmedi) etanol ile hazırlanan ekstresinde K. pneumoniae'ye karşı etkili olduğu tespit edildi. Fakat E. coli'ye ve P. aeruginosa'ya karşı etki etmedi. Ayrıca kloroform ile yapılan zahter ekstresinin, etanol ile yapılan zahter ekstresine göre daha güçlü bir antimikrobiyal etkiye sahip olduğu tespit edildi.
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