Browsing by Subject "body fluid"
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Item Open Access Exosomes: Natural nanovesicle candidates used in the diagnosis and treatment(Turkish Society of Immunology, 2013) Kahraman, T.; Gíiçlíiler G.; Gürsel I.Exosomes are nano-vesicles released by all known cells. Although they were called as residual cells acting as a cleaner of undesired molecules out of cell during the first discovery in 1980s, recent studies have revealed critical physiological tasks of these vesicles over the past 20 years. These vesicles which can be produced by all body fluids play an important role in many biological activities including intracellular communication, signal conduction, genetic material transfer, and regulation of immune response. Due to their several tasks, exosomes play a crucial role in the disease pathogenesis. Considering all these tasks, exosomes can be considered in both diagnosis and treatment. Exosomes originating from distinct cells have immunosuppressive and immunostimulatory features and, thereby, therapeutic attempts which regulate immune function in case of autoimmune and immunosuppression. In addition, thanks to being natural nano-carriers, exosomes may pave the way for the development of new-generation vaccines containing both adjuvant and antigen. Besides therapeutic applications, there are evidences indicating that exosomes can be used in the diagnosis of several cancer forms including prostate cancer, glioblastoma, squamous-cell lung carcinoma and hepatocellular carcinoma, as they play a role in the disease pathogenesis. © 2014 Turkish Journal of Immunology.Item Open Access In vitro biocompatibility of plasma-aided surface-modified 316L stainless steel for intracoronary stents(Institute of Physics Publishing, 2010) Bayram, C.; Mizrak, A.K.; Aktürk, S.; Kurşaklioǧlu H.; Iyisoy, A.; Ifran, A.; Denkbaş, E.B.316L-type stainless steel is a raw material mostly used for manufacturing metallic coronary stents. The purpose of this study was to examine the chemical, wettability, cytotoxic and haemocompatibility properties of 316L stainless steel stents which were modified by plasma polymerization. Six different polymeric compounds, polyethylene glycol, 2-hydroxyethyl methacrylate, ethylenediamine, acrylic acid, hexamethyldisilane and hexamethyldisiloxane, were used in a radio frequency glow discharge plasma polymerization system. As a model antiproliferative drug, mitomycin-C was chosen for covalent coupling onto the stent surface. Modified SS 316L stents were characterized by water contact angle measurements (goniometer) and x-ray photoelectron spectroscopy. C1s binding energies showed a good correlation with the literature. Haemocompatibility tests of coated SS 316L stents showed significant latency (t-test, p < 0.05) with respect to SS 316L and control groups in each test. © 2010 IOP Publishing Ltd.