Browsing by Author "Diuzheva A."

Now showing 1 - 3 of 3

Chemical fingerprints, antioxidant, enzyme inhibitory, and cell assays of three extracts obtained from Sideritis ozturkii Aytaç & Aksoy: An endemic plant from Turkey
(2019-07-15) Zengin G.; Uğurlu A.; Baloglu M.C.; Diuzheva A.; Jekő J.; Cziáky Z.; Ceylan R.; Aktumsek A.; Picot-Allain C.M.N.; Fawzi Mahomoodally M.
This study was geared towards assessing the possible antioxidant, enzyme inhibitory, and cytotoxic activities of ethyl acetate, methanol, and water extracts of Sideritis ozturkii Aytaç & Aksoy. The phytochemical profiles of the studied extracts were characterised by HPLC-MS/MS. The methanol extract, rich in phenolics (78.04 mg gallic acid equivalent/g), exhibited the strongest antioxidant activities. However, the ethyl acetate extract was the most active extract in the enzyme inhibitory assays. The water extract of S. ozturkii (1 mg/ml, 48 h incubation) slightly inhibited (22%) growth of human breast cancer cell line (MDA-MB-231 cells). On the other hand, the ethyl acetate and methanol extracts showed strong inhibition (98% and 97%, respectively) of MDA-MB-231 cells and caused apoptotic cell death. Scientific data generated from this study further appraises the multiple biological activities of plants belonging to the Sideritis genus. In addition, preliminary evidence gathered from the current investigation advocates for further studies geared towards the preparation of therapeutic formulations from S. ozturkii.
Exploring of Coronilla varia L. extracts as a source of high-value natural agents: Chemical profiles and biological connections
(2021-12-01) Yerlikaya S.; Baloglu M.C.; Altunoglu Y.C.; Diuzheva A.; Jekő J.; Cziáky Z.; Zengin G.
Pharmacological studies have indicated that flavonoids are crucial compounds to eliminate drug resistance. In this report, the activity of ethyl acetate (EAE), methanol (ME) and water (WE) extracts of Coronilla varia L. on antioxidant and enzyme inhibitory activities, DNA protective effects, antiproliferative activities, apoptotic; autophagic and telomerase gene activity analysis in breast cancer cells and inhibitory effects on cell migration ability of malignant breast cancer cells were examined. In addition, HPLC-MS-MS was used for detection of chemical profiles of all extracts. Results showed that the highest concentration of the bioactive components was detected in EAE (50.86 mg GAE/g for phenolics and 25.66 mg RE/g for flavonoid). Also, EAE displayed significant antioxidant properties in radical scavenging and reducing power assays. Regarding enzyme inhibitory effects, EAE and ME were more active than WE. Some significant compounds such as, vitamin B5, riboflavin, citric acid, and isoflavonoid derivate – medicarpin, noscapine were detected only in WE. Apigenin was determined in all extracts. WE indicated the most shield effect on pDNA against oxidative damage. Half-maximal inhibitory concentrations of extracts on breast cancer cells were calculated with MTT cell viability test. Bax gene was up-regulated and anti-apoptotic gene known as Bcl-2 was down-regulated on MDA-MB-231 cells after treated with WE. TERT-1 gene was down-regulated after treated with EAE and ME for MDA-MB-231 and MCF-7 cells, respectively. Cell migration ability of both MDA-MB-231 and MCF-7 cells was prevented with EAE and ME. A more effective treatment strategy can be applied by combining these extracts with commercial chemotherapy drugs which cause apoptosis and cell migration inhibition in vitro.
Investigation of chemical profile, biological properties of Lotus corniculatus L. extracts and their apoptotic-autophagic effects on breast cancer cells
(2019-09-10) Yerlikaya S.; Baloglu M.; Diuzheva A.; Jekő J.; Cziáky Z.; Zengin G.
This study aimed to reveal chemical profiles and biological activities of ethyl acetate (EA), methanol (MeOH), and water extracts of Lotus corniculatus. Ethnobotanical reports have indicated the importance of phytochemical properties of the genus Lotus. In this study, the effects of medicinal plant extracts on antioxidant (DPPH, ABTS, CUPRAC, FRAP, phosphomolybdenum, and metal chelating assays), enzyme inhibitory (on cholinesterase, tyrosinase, a-amylase and a-glucosidase), DNA protection and anticancer properties (including anti-proliferative, cell death and telomerase activity marker gene analysis, apoptotic DNA fragmentation analysis, cell migration test) were evaluated. According to chemical analysis, quercetin derivatives geraldol, isorhamnetin and kaempferol-O-coumaroylhexoside-O-deoxyhexoside isomers were dominant in the extracts. MeOH extracts showed the highest total flavonoids capacity with 21.13 mg RE/g. EA extract showed the strongest anti-amylase activity among the tested extracts. Water extract had the most protective activity against plasmid DNA. To indicate cell survival, MTT test was performed against human MCF-7 and MDA-MB-231 breast cancer cells. Half-maximal inhibitory concentration for cells were calculated and used for detection of mechanisms behind the cancer cell death. EA extract showed up-regulation of Bax proapoptotic gene and apoptotic DNA fragmentation activity on highly invasive MDA-MB-231 cells. Beclin-1 and LC3-II autophagy genes were higly expressed after treatment of MCF-7 cells with EA extracts. EA and MeOH extracts inhibited cell migration ability of both cancer cells. Linoleamide, was dominant component in EA extract and caused apoptosis on MDA-MB-231 breast cancer cells via increasing intranuclear Ca²+. The detailed mechanism behind the anticancer properties should be further investigated.