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    Some bryophytes trigger cytotoxicity of stem cell-like population in 5-fluorouracil resistant colon cancer cells
    (Taylor and Francis, 2021) Özerkan, Dilşad; Erol, Ayşe; Altuner, Ergin Murat; Canlı, Kerem; Kuruca, Dürdane Serap
    Colorectal cancer is the third most common cancer worldwide. Cancer stem cells are known to play an important role in relapse, and metastases of the disease after chemotherapy. Investigation of new drugs, and their combinations targeting these cells and thus eliminating cancer is one of the most urgent needs of today’s chemotherapy. The aim of the present study was to evaluate the effects of Bryophytes like Abietinella abietina (AA), Homolothecium sericeum (HS), Tortella tortuosa (TT), Syntrichia ruralis (SR), and Bryoerythrophyllum rubrum (BR) species extracted with ethyl alcohol on 5-fluorouracil(5-FU) resistant colorectal cancer cell lines (HCT116 and HT29). After extraction, stock solutions of bryophytes were prepared, and IC50 values were detected in drug-resistant cells obtained with 5-FU application. CD24+, CD44+/CD133+ surface markers and P?glycoprotein (P-gp) mediated efflux were isolated from both 5-FU treated cells and analyzed using the flow cytometry. In all bryophyte-treated groups, the binding Rho123low (low Rho fluorescence) and Rhohigh (high Rho fluorescence) were sorted from 5-FU resistant HCT116, and HT-29 cells. All types of bryophytes were found cytotoxic. Bryophyte extract reduced the percentage of Rholow cells in cultures incubated with 5-FU. In summary, the implementation of these bryophytes might be regarded as an effective approach for treatment of colorectal cancer due to their cytotoxic effect that decreases the recurrence of the disease.
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    Synthesis and Anticancerogenic Effect of New Generation Ruthenium-Based Nanoparticle from Homalothecium sericeum with Eco-Friendly Method
    (Springer, 2023) Samir, Nourhan; Ozerkan, Dilsad; Danisman-Kalindemirtas, Ferdane; Kariper, Ishak Afsin; Bulut, Huri; Kuruca, Duerdane Serap; Altuner, Ergin Murat
    BackgroundGreen synthesis is a simple, inexpensive, and highly efficient method for the preparation of nanoparticles. In this study, ethanol extracts of Homalothecium sericeum (HOM) moss were used as reducing agents for the synthesis of biocompatible ruthenium nanoparticles (RuNPs). The ruthenium-based green synthesis method has not been used in any other work in the literature. UV-visible spectrophotometer (UV-Vis), Zetasizer, FTIR, and EDX-SEM were used to characterize the RuNPs synthesized by the green synthesis method, and their efficacy on cell viability was tested on HCT116 human colon cancer cells.MethodsUV spectroscopic measurements were used to study the release of HOM-RuNPs. Apoptosis was assessed by measuring protein expression of p53, Bax, and Bcl-2 by Western blotting. The presence of apoptosis was confirmed by double staining with Hoechst dye/propidium iodide under a fluorescence microscope. HOM-RuNPs were also tested for BCRP/ABCG2 expression to check for drug resistance.ResultsHOM-RuNPs with a size of 70-80 nm were found to be most effective at a dosage of 5.71 mu g/ml and induced cell death by increasing the ratio of Bax/Bcl-2 and p53 expression. It was also shown to reduce multidrug resistance protein (ABCG2), suggesting that it may be useful against multidrug resistance.ConclusionRuthenium-based nanoparticles synthesized by a green synthesis technique may be a candidate for anticancer drugs in the pharmaceutical industry and deserve further attention for proof-of-concept studies.
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    Syntrichia ruraliformis (Besch.) Mans., Hypnum andoi A.J.E.Sm. ve Platyhypnidium riparioides Dixon Etanol Ekstraktlarının HCT116 Hücre Canlılığı Üzerindeki Etkilerinin Spektroskopik Açıdan İncelenmesi
    (2021) Canlı, Kerem; Altuner, Ergin Murat; Özerkan, Dilşad; Zengin Köksal, Hilal
    Kolon kanseri neredeyse her yıl bir milyondan fazla yeni tanıların ortaya koyulduğu ve dünyada en sık rastlanan üçüncü kanser türüdür. Her yaş grubunda görülebildiği gibi kalıtımsal kökenli değildir. Bu veriler göz önüne alındığında kanserin tedavisi için yeni ilaç kombinasyonlarının araştırılması önemli bir ihtiyaçtır. Bu çalışmada, anti-kanser aktivitesi bilinmeyen Syntrichia ruraliformis (Besch.) Mans., Hypnum andoi A.J.E.Sm, Platyhypnidium riparioides Dixon karayosunu türlerinden elde edilen ekstraktlarının HCT116 kolon kanser hücre hatlarına karşı etkileri değerlendirilmiştir. Karayosunu türlerinin etil alkol çözücüsünde elde edilen ekstrelerinden, DMSO ile stok solüsyonlar hazırlanarak, çeşitli konsantrasyonlarda sitotoksite test (MTT) deneyleri yapılmıştır. HCT116 serisinde bulunan tüm karayosunu türlerinin IC50 değerlerine göre belirlenen dozlar aynı şekilde mezenkimal kök hücrelere (MKH) uygulanmıştır. Ayrıca, Fourier transform kızılötesi (FTIR) spektroskopisi üç karayosununa maruz kalan kanser hücrelerini analiz etmek için kullanılmıştır. Sonuç olarak, karayosunu türlerinin HCT116 kolorektal kanser hücre hattına karşı yüksek oranda antiproliferatif etki gösterdiği, bunun aksine MKH hücrelerinde letal olmadığı tespit edilmiştir. Ayrıca, FTIR spektrumu ile elde edilen sonuçların tüm hücre proliferasyonu verileriyle paralel seyrettiği moleküler düzeyde de belirlenmiştir. Tüm sonuçların ışığında bu karayosunu türlerinin, biyoaktif bileşenleri belirlendiği takdirde, potansiyel kanser ilacı olma özelliğine sahip olduğu düşünülmektedir. Anahtar kelimeler: Briyofit, anti-proliferatif, kolorektal kanser, FTIR