In this study, we report on the synthesis of silver nanoparticles (AgNPs) from the leaf extracts of Cynara scolymus (Artichoke) using microwave irradiation and the evaluation of its anti-cancer potential with photodynamic therapy (PDT). Silver nanoparticles formation was characterized by scanning electron microscopy with energy dispersive x-ray spectroscopy and Fourier transform infrared (FTIR) spectroscopy. Silver nanoparticles formation was also investigated the surface charge, particle size and distribution using zetasizer analysis. The cytotoxic effect of AgNPs and/or PDT was studied by MTT assay and migration by the scratch assay. The apoptotic inducing ability of the AgNPs and/or PDT was investigated by intracellular ROS analysis, antioxidant enzyme levels (SOD, CAT, GPx and GSH), Hoechst staining and Bax/Bcl-2 analysis using western blotting. The mean particle size of produced AgNPs was found 98.47±2.04 nm with low polydispersity (0.301±0.033). Zeta potential values of AgNPs show -32.3± 0.8 mV. These results clearly indicate the successful formation of AgNPs for cellular uptake. Mitochondrial damage and intracellular ROS production were observed upon treatment with AgNPs (10μg/mL) and PDT (0.5 mJ/cm 2 ) showed significant reducing cell migration, expression of Bax and suppression of Bcl-2. Significantly, biosynthesized AgNPs showed a broad-spectrum anti-cancer activity with PDT therapy and therefore represent promoting ROS generation by modulating mitochondrial apoptosis induction in MCF7 breast cancer cells.

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ÖZAmaç: Bu çalışmanın amacı, yeşil kimya yöntemiyle çinko oksit nanopartiküllerini (ZnONPs) sentezlemek ve bu nanopartiküllerin anti-bakteriyel ve anti-kanser etkilerini incelemektir. Gereç ve Yöntemler: Çinko iyonları ve sulu enginar yaprağı (Cynara scolymus) ekstraktı kullanılarak ZnONPs yeşil kimya yöntemiyle sentezlendi. ZnONPs oluşumunun doğrulanması ve karakterizasyonu için morötesi-görünür bölge spektroskopisi (UV-Vis), Fourier dönüşümü kızılötesi spektroskopisi (FTIR), taramalı elektron mikroskobu (SEM), zetasizer ve Enerji dağınım X-ışını spektroskopisi (EDX) analizleri kullanıldı. ZnONPs'nin 4 farklı bakteri türü (E. coli, S. aureus, P. aeruginosa ve E. faecalis) üzerindeki antibakteriyel aktiviteleri, minimal inhibe edici konsantrasyon (MİK) ve kuyucuk difüzyon yöntemiyle ölçüldü. ZnONPs'nin HT-29 insan kolon kanseri hücreleri üzerindeki sitotoksik etkileri konsantrasyon ve zamana bağlı olarak olarak belirlendi. Bulgular: UV-Vis spektrumunda ZnO'ya spesifik olan 320-335 nm aralığında absorbans artışı gözlemlendi. FTIR spektrumunda 426 cm -1 ve 540 cm -1 'de ZnO'ya ait gerilme titreşimleri belirlendi. SEM analizinde partikül boyutu 276-309 nm ölçüldü. ZnONPs'nin zeta-sizer analizlerinde partikül büyüklüğü 137,8 nm ve partikül yükü -6,34 meV olarak bulundu. Antibakteriyel aktivite ölçümlerinde, sentezlenen nanopartiküllerin E. coli ve S. aureus'ta bakteriyel aktivite inhibisyonu sağladığı tespit edildi. ZnONPs HT-29 kolon kanseri hücreleri üzerinde 10 µg/mL'den daha yüksek konsantrasyonlarda sitotoksik etki gösterdi. Sonuç: ZnONPs'nin düşük maliyetle hazırlanabileceği ve klinik tedavilerde yeni ilaç formülasyonları için taşıyıcı sistem olarak kullanılma potansiyeline sahip olduğu bu çalışma ile gösterilmiştir. ABSTRACTAim: The aim of this study is to synthesize zinc oxide nanoparticles (ZnONPs) by green chemistry method and investigate anti-bacterial and anticancer effects of these nanoparticles. Material and Methods: ZnONPs were synthesized by the green chemistry method using zinc ions and aqueous artichoke leaf (Cynara scolymus) extract. Ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), zetasizer and energy dispersive X-ray spectroscopy (EDX) were used to confirm the formation and characterization of ZnONPs. Antibacterial activities of ZnONPs on four different bacteria species (E. coli, S. aureus, P. aeruginosa and E. faecalis) were measured by minimal inhibitory concentration (MIC) and agar well diffusion method. Cytotoxic effects of ZnONPs on HT-29 human colon cancer cells were determined as concentration and time dependent. Results: In the UV-Vis spectrum, absorbance increase was observed in 320-335 nm range which is specific to ZnO. In the FTIR spectrum, stretching vibrations of ZnO were determined in 426 cm -1 and 540 cm -1 . The particle size was 276-309 nm in SEM analysis. In the zeta-sizer measurements of ZnONPs, the particle size was 137.8 nm and the particle charge was -6.34 meV. In the antibacterial activity measu...

A novel hybrid ligand, a vic‐dioxime ligand (ETO), containing thiosemicarbazone and egonol moieties from a natural plant (Styrax officinalis) and its trinuclear [Ni(II), Cu(II), Co(II), and Fe(II)] and mononuclear [Pd(II) and Zn(II)] complexes have been synthesized and characterized. The ligand, complexes, and natural components were characterized by conventional spectroscopic techniques (IR, NMR, and MS) and evaluated against two human cancer cell lines (MCF‐7 and PC‐3) to determine their antiproliferative and apoptotic properties. Apoptotic or necrotic effects were detected in both cancer cell lines using the Hoechst/propidium iodide double‐staining method. Paclitaxel was used as a positive control (1 μM). The results displayed that the compounds obtained in this study were effective in the concentration range of 5–40 μM in prostate and breast cancer cell lines. It can be said that the compounds (egonol, its derivatives, hybrid ligand, and its metal complexes) are mostly more effective in PC‐3 migration lines. Consequently, the cytotoxic efficiencies of [Cu3(ETO)2·4Cl], 5.27 μM for MCF‐7 and 13.44 μM for PC‐3 and [Zn (ETO)·2Cl] 11.73 μM for MCF‐7 and 9.32 μM for PC‐3 were observed to be close to paclitaxel (a drug used as a cancer chemotherapeutic agent). [Cu3(ETO)2·4Cl] were more effective on the MCF‐7 cell line. Besides this result, [Zn (ETO)·2Cl] was more effective on the PC‐3 cell lines and was more effective by triggering apoptosis in the cells.