Person:
ATASOY, SEZEN

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SEZEN
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ATASOY
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Now showing 1 - 10 of 10
  • PublicationMetadata only
    Albümin-gluteraldehit doku yapıştırıcısının insan dişeti fibroblast hücreleri üzerindeki etkilerinin incelenmesi
    (2020-09-01T00:00:00Z) DOGANAY, ÖZGE; ALKAN, ALPER; DİKER, NURETTİN; ATASOY, SEZEN; DOĞANAY, ÖZGE; ATASOY, SEZEN; DİKER, NURETTİN; ALKAN, ALPER
  • PublicationOpen Access
    Investigating differential miRNA expression profiling using serum and urine specimens for detecting potential biomarker for early prostate cancer diagnosis
    (2021-02-08T00:00:00Z) Hasanoğlu, Sevde; Göncü, Beyza Servet; Yücesan, Emrah; Atasoy, Sezen; Kayali, Yunus; Özten Kandaş, Nur; GÖNCÜ, BEYZA SERVET; YÜCESAN, EMRAH; ATASOY, SEZEN
    Background/aim: MicroRNAs (miRNAs) are known up-to-date candidate biomarkers for several diseases. In addition, obtaining miRNA from different body fluids such as serum, plasma, saliva, and urine is relatively easy to handle. Herein we aimed to detect miRNAs as biomarkers for early stage prostate cancer (PC). For this purpose, we used urine and serum samples to detect any significant differences in miRNA profiles between patients and healthy controls. Materials and methods: Total ribonucleic acid (RNA) in urine and serum samples were isolated from eight untreated PC patients, thirty healthy individuals were screened for miRNA profile, and candidate miRNAs were validated. Whole urinary and serum miRNA profile was analyzed using Affymetrix GeneChip miRNA 4.0 Arrays. Candidate miRNAs were investigated by stem-loop reverse transcription- polymerase chain reaction. Results: When we analyzed the urinary samples of PC patients, 49 miRNAs were detected to be upregulated and 14 miRNAs were found to be downregulated when compared with healthy controls. According to the serum samples, 19 miRNAs were found to be upregulated, and 21 miRNAs were found to be downregulated when compared with healthy individuals as well. Interestingly, we detected only four overlapping miRNAs (MIR320A, MIR4535, MIR4706, MIR6750) that commonly increase or decrease in both serum and urine samples. Among them, MIR320A was found to be downregulated, and MIR4535, MIR4706, and MIR6750 were found to be upregulated for urine samples. However, only MIR6750 was upregulated and the other three miRNAs were downregulated for serum samples. Conclusion: Notably, the expression profile of MIR320A was significantly altered in urine specimens of prostate cancer patients. We considered that MIR320A has been evaluated as a valuable biomarker that can be used in the early diagnosis of PC.
  • PublicationOpen Access
    A Preliminary Investigation on the Chromosome Aberrations in Acute Lymphoblastic Leukaemia Using Multiprobe Fluorescence In Situ Hybridization Panel
    (2022-06-01T00:00:00Z) Gokkaya, Bengisu; Atasoy, Sezen; ÇIRAKOĞLU, AYŞE; ARGÜDEN, YELDA; KURU, RAHİYE DİLHAN; YILMAZ, ŞÜKRİYE; ÖNGÖREN, ŞENİZ; DEVİREN, AYHAN; ATASOY, SEZEN
    Objective: Acute lymphoblastic leukemia (ALL) is a disease related to the overproduction of immature lymphocytes. Fin diagnosis and classification of ALL, recognizing chromosome aberrations using conventional cytogenetic analysis (CCA) is essential. However, limited ability of CCA to capture cryptical chromosomal aberrations is a major drawback. The aim of this study was to investigate recurrent aberrations in patients with ALL with normal karyorype or unsuccessful karyoryping using the fluorescence in situ hybridization (FISH) method. Methods: Ten patients with ALL were included in this study. CCA was done according to the standart protocols, and then, multiprobe FISH panel was used for analyzing different chromosomal regions located on 12p13.2/21q22.12, 9q34.11-q34.12/22q11.22-q11.23, 9p21.3, 19p13.3, 11q23.3, 8q24.21, 14q32.33, 10p11.1-q11.1, 17p11.1-q11.1 and 4q12. Results: Analyses of the specific chromosomal regions with FISH assay revealed undetected chromosome rearrangements. Among all the cases, four of them harbored chromosomal abnormalities. MYC, TCF3, IGH rearrangements, CDKN2A deletion and hyperdiploidy were detected in the study. Conclusion: Diagnostic sensitivity of FISH probes in comparison with CCA is effective in the detection of multiple chromosomal rearrangements with prognostic significance. For the improvement of the cytogenctic examination and achieving optimum results for patients with ALL , FISH panels are needed to be used combining with conventional cytogenetics routinely.
  • PublicationMetadata only
    Evaluation of cytotoxic and antioxidant potential of Dittrichia viscosa (L.) Greuter used in traditional medicine
    (2021-08-01T00:00:00Z) SEVGİ, ECE; DAĞ, AYDAN; Kizilarslan-Hancer, Cagla; ATASOY, SEZEN; ZENGİN KURT, BELMA; Aksakal, Oznur; SEVGİ, ECE; DAĞ, AYDAN; KIZILARSLAN HANÇER, ÇAĞLA; ATASOY, SEZEN; ZENGİN KURT, BELMA
    Ethnopharmacological relevance: Dittrichia viscosa (L.) Greuter (& ldquo;Sari ot, Yapis & cedil;kan andiz otu & rdquo; in Turkish) is a medicinal plant that has been traditionally used in the Mediterranean area. This plant is used by the local population for the treatment of cancer. Investigation of their biological activities is therefore very important to be supported by scientific basis for traditional use.
  • PublicationMetadata only
    Glycopolymer decorated multiwalled carbon nanotubes for dual targeted breast cancer therapy.
    (2020-03-25T00:00:00Z) Omurtag Ozgen, Pinar Sinem; Zengin Kurt, Belma; Atasoy, SEZEN; Durmus, Zehra; Yigit, Gülşah; Dağ, Aydan; ATASOY, SEZEN; ZENGİN KURT, BELMA; DAĞ, AYDAN
    Carbon-based nanomaterials (CNMs) have attracted great attention in biomedical applications such as cancer imaging and therapy. CNMs, which are currently used in a wide range of applications, suffer from drawbacks of toxicity and low biocompatibility. Either noncovalent or covalent functionalization of CNMs with hydrophilic and biocompatible polymers which help to block hydrophobic interactivity between CNMs and cells can greatly increase their biocompatibility by eliminating their probable toxicity towards living organisms. In this report, we present a comparison of both noncovalent and covalent functionalization approaches in order to introduce a biocompatible glycoblock copolymer onto multi-walled carbon nanotubes (CNTs) in order to enhance their potential in therapies. An anticancer drug (doxorubicin, Dox) was conjugated with two different end functionalized poly(1-O-methacryloyl-beta-d-fructopyranose-b-(2-methacryloxyethoxy))benzaldehyde glycoblock copolymers, which were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization, by either noncovalent or covalent tethering. CNTs were coated separately with the synthesized drug-conjugated glycoblock copolymers and folic acid (FA) to obtain an efficient drug delivery platform for dual-targeting of glucose transporter protein (GLUT5) and folic acid receptors (FR) in breast cancer. A library of synthesized monomers, polymers and prepared glycoblock copolymer coated CNTs (hybrid-CNTs) using both approaches were comprehensively characterized by various techniques. Transmission electron microscopy measurements showed the homogeneous, smooth morphology of the prepared Dox-conjugated glycoblock copolymer coating of CNTs and confocal laser scanning microscopy images displayed successful cellular internalization of hybrid-CNTs in the MCF-7 and MDA-MB-231 human breast cancer cell lines. This research demonstrates the potential of hybrid-CNTs as a biocompatible drug delivery system as well as in vitro use of Dox-conjugated vehicles for dual receptor mediated breast cancer therapy.
  • PublicationMetadata only
    Phthalocyanine-Conjugated Glyconanoparticles for Chemo-photodynamic Combination Therapy
    (2021-02-01T00:00:00Z) Dağ, Aydan; Cakilkaya, Eda; Omurtag Özgen, Pınar Sinem; Atasoy, Sezen; Yiğit Erdem, Gulsah; Çetin, Büşra; Gürek, Ayşe Gül; DAĞ, AYDAN; ATASOY, SEZEN
  • PublicationMetadata only
    Synthesis of new fatty acid derivatives of oleanane and ursane triterpenoids and investigation of their in vitro cytotoxic effects on 3T3 fibroblast and PC3 prostate cancer cell lines
    (2020-09-01T00:00:00Z) Şenol, Halil; Çokuludağ, Kübra; Aktaş, Asude Sena; Atasoy, Sezen; Dağ, Aydan; Topçu, Gülaçtı; ŞENOL, HALIL; ATASOY, SEZEN; DAĞ, AYDAN; TOPÇU, GÜLAÇTI
  • PublicationMetadata only
    Folic Acid-Conjugated pH and Redox-Sensitive Ellipsoidal Hybrid Magnetic Nanoparticles for Dual-Triggered Drug Release
    (2020-08-17T00:00:00Z) Birlik Demirel, Gokcen; Aygul, Ebru; DAĞ, AYDAN; ATASOY, SEZEN; Cimen, Zeynep; Cetin, Busra; DAĞ, AYDAN; ATASOY, SEZEN
    © 2020 American Chemical Society.Stimuli-sensitive and multifunctional nanoparticles are highly desirable biomedical materials for triggered and targeted drug delivery applications. Here, we have designed pH- A nd redox-triggered magnetic lipid-polymer hybrid nanoparticles (MHNPs) with a core-shell structure. This design is composed of a silica-/mesoporous silica-coated ellipsoidal magnetic nanoparticle with multifunctionality: Carrying the anticancer drug (doxorubicin, DOX), the cancer cell targeting ligand (folic acid-conjugated poly(ethylene glycol), FA-PEG) polymer, and being coated with a biocompatible pH-/redox-responsive (poly-l-histidine-poly(ethylene glycol)-lipoic acid; PLH-PEG-LA) polymer. The lipoic acid units of the PLH-PEG-LA shell of the FA-MHNPs were cross-linked using 1,4-dithiothreitol (DTT). When the FA-MHNPs-DOX were exposed to an endolysosomal pH of 5.5 and 10 mM glutathione (GSH), the particles exhibited a very efficient DOX release profile within 24 h. In addition, cytotoxicity, uptake, and apoptosis assays were performed against breast cancer cell lines. These results showed that FA-MHNPs-DOX promote an enhanced uptake and cell morbidity compared to the nontargeted MHNPs-DOX against tested cell lines. Moreover, the FA-MHNPs-DOX exhibited very effective cytotoxicity and also decreased the cell viability through apoptosis against breast cancer cell lines. In conclusion, it can be said that the pH and redox dual-responsive hybrid FA-MHNPs-DOX has a great potential for controlled drug release.
  • PublicationOpen Access
    Can the arterial clamp method be used safely where a tourniquet cannot be used?
    (2021-07-07T00:00:00Z) Erdogan, Ozgur; Gürkan, Volkan; Sönmez, Cavide; Erden, Tunay; Atasoy, SEZEN; Yildiz, Fatih; İnan, Bekir; Adilli, Adile; ATASOY, SEZEN