Bezmialem Vakif University DSpace Openaccess Platformu

Welcome to the Open Access System!

This site is Bezmialem Vakif University Academic Open Access System. The system was established in June 2019 in order to store the academic outcomes of Bezmialem Vakif University in digital standards and to provide them with open access. OpenAccess includes academic outputs such as articles, presentations, dissertations, books, book chapters and reports produced by Bezmialem Vakif University.

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Analyzing Eight Turkish Macroalgae: Fatty Acids, Proteins, and in Silico Biological Activity Profiles

(2024-09-01) Naz M.; Şenol H.; Okudan E. Ş.; Sayın S.; Konuklugil B.; Topçu G.

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Bioisosteric replacement of the carboxylic acid group in Hepatitis-C virus NS5B thumb site II inhibitors: Phenylalanine derivatives

(2024-12-01) Camcı M.; Şenol H.; Köse A.; Karaman Mayack B.; Alayoubi M. M.; Karalı N. L.; Gezginci M. H.

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Development of phytotherapeutic nanoformulation containing Gypsophila eriocalyx and its evaluation as a candidate formulation for osteoporosis treatment on human bone marrow stem cells

(2024-01-01) Kaymak S.; Kurtur O. B.; Gok B.; KILINÇ Y.; Kecel-Gunduz S.; Nath E. Ö.; KARTAL M.

Introduction: Osteoporosis, one of the common bone diseases, manifests itself as a decrease in bone mass. Recently, the use of medicinal plants in the search for effective and low-toxicity therapeutics for the prevention or treatment of osteoporosis has become a trending topic. Objective: In this study, we aim to prepare a controlled drug carrier system loaded with Gypsophila eriocalyx to determine its potential for anti-osteoporosis applications. Methods: Gypsophila eriocalyx extract (GEE) was prepared, and components were determined. The molecular interactions of the components with Cathepsin K (CatK), which is used as a target in drug development against osteoporosis, were revealed by in silico molecular docking and MD methods. ADMET profiles were also examined. GEE-loaded chitosan nanoparticles (CNPs) were synthesized. The nanoparticles\" morphology, encapsulation efficiency, loading capacity, release profile, average size, polydispersity index, and zeta potentials were determined. The cytotoxic effects of GEE and GEE-loaded CNPs on the L929 and osteogenic proliferation profiles on human bone marrow stem cells (hBMC) were examined. Results: The MD analysis revealed no breaks or atomic changes in the dynamic system, and the docking analysis confirmed the continued interaction of identical residues. It was determined that the GEE-loaded CNP formulation was produced successfully, had no toxic effect on the L929, and had an osteogenic proliferation effect on hBMC. Conclusion: In line with the in vitro and in silico results obtained, it was evaluated that GEE-loaded CNPs can be used as a controlled drug release system as a candidate formulation with phytotherapeutic properties for osteoporosis treatment.q1.

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Prevalence, distribution, and prognostic significance of morphological variants of neuroendocrine tumors of the gastrointestinal tract - a multicenter study

(2024-01-01) Akay E.; Ordu M.; ÇOBAN G.; Darakcı S.; Topaloğlu N.; Taştekin F. M.; Ekinci B.; ŞAHİN N.; GÜCİN Z.; Karaman H.

The incidence and prevalence of neuroendocrine neoplasms (NENs) in many organs are increasing. Although such NENs have similar grades, they may exhibit quite different behaviors. In this multicenter study, we aimed to investigate the prevalence and distribution of different morphological NEN variants in the non-pancreatic gastrointestinal (GI) tract and determine whether they can guide prognosis prediction. Two hundred and fifty-six patients diagnosed with NENs originating from the GI tract from 7 different centers were included in the study. In 89 (36.6%) cases, different morphological variants were detected. When the variants were grouped according to their aggressiveness as described in the literature, a statistically significant relationship between aggressiveness and the variables organ and age was found ( p < 0.05). The oncocytic variant was found to metastasize more than the other aggressive types (42.9%). The paraganglioma-like variant was found to have a smaller size, lower proliferation index, and a more benign clinical course. This study demonstrated that well-differentiated GI neuroendocrine tumors (GI-NETs) have considerable morphological diversity. Generally, case reports of rare morphological variants of GI-NETs are available in the literature. We believe that our study contributes to a better understanding of the prevalence, localization, and significance of morphological variations in GI-NETs.