Handan gökben Sevindik

Dr. Handan gökben Sevindik


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 December 2022 in International Journal of Life Sciences and Biotechnology
Verified
Journal Article
Closed access
PDF file
LGLEYLA GÜVEN
LEYLA GÜVEN
UÖUfuk Özgen
Ufuk Özgen
HSHandan gökben Sevindik
Handan gökben Sevindik
IAİcLal Ağan
İcLal Ağan
MKMehmet Koca
Mehmet Koca
YAYüksel Aliyazıcıoğlu
Yüksel Aliyazıcıoğlu
In this study, we investigated antioxidant, anticholinesterase, antityrosinase properties, and polyphenolic and flavonoid content by spectrophotometric; antimicrobial by disc diffusion and microdilution method; antigenotoxic activities by comet assay, and the phytochemical composition of the Rosa pimpinellifolia extracts by LC-MS/MS. The EtOAc extract of the root (RPKE) had higher antioxidant activities at 10 μg/mL with inhibition of 39.7, 91.2, and 39.5% respectively in the DPPH·, ABTS•+, and superoxide anion radical scavenging activity assay than standard antioxidant molecules. The polyphenolic contents of the RPKE and the EtOAc extract of the seed (RPÇE) were found to be 378.2 ± 0.477 and 305.39 ± 0.568 μg GAE/mg respectively. The extracts of RPKE showed butyrylcholinesterase activity with 19±0.12% inhibition at 100 μg/mL concentration. RPKE showed higher activity at 500 μg/mL with inhibition of 50% in the tyrosinase inhibitory assay than the other R. pimpinellifolia extracts. The extracts of R. pimpinellifolia exhibited antimicrobial activity against Staphylococcus aureus and Candida albicans. The extracts of R. pimpinellifolia did not show any antigenotoxic effect up to the concentration of 1000 μg/mL. In LC/MS/MS analysis, Cyanidin-3-O-Glucoside and isoquercetin in the pseudo-fruit; procyanidin B2 and catechin in the root were the major phenolic compounds.

26 June 2024 in Molecules
Verified
Journal Article
Open access
PDF file
RÖRıdvan Özgen
Rıdvan Özgen
EKEsen Sezen Karaoğlan
Esen Sezen Karaoğlan
HSHandan gökben Sevindik
Handan gökben Sevindik
HHHayrunisa Hanci
Hayrunisa Hanci
CKCavit Kazaz
Cavit Kazaz
In this study, the isolation of compounds from the aerial parts of Morina persica L. and the antimicrobial, antioxidant and antityrosinase activities of various polarity extracts and isolated compounds were investigated. Column chromatography methods were used for isolation. A microdilution method was used to determine antimicrobial activity; Folin-Ciocalteu method was used to determine total phenolic content; DPPH and ABTS radical scavenging- capacity methods were used to determine antioxidant activity; and a mushroom tyrosinase method was used to determine antityrosinase activity. Kaempferol-3-O-β-glucopyranoside (astragalin) and quercetin-3-O-rutinoside (rutin) were isolated from M. persica. The extracts and compounds showed higher activity against Staphylococcus aureus and Enterococcus faecalis than other tested bacteria. The highest phenolic content, DPPH, and ABTS radical scavenging activity were detected in an ethyl acetate extract at 50 μg/mL concentration. The methanol extract showed the highest antityrosinase effect at 200 μg/mL concentration.