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The significance of extracellular DNA in osteoclastogenesis from peripheral blood precursors - in vitro study
 Jelínková, Ivana ; Daňková, Pavlína (advisor) ; Korabečná, Marie (referee)
Introduction: Extracellular DNA (ecDNA) is a common component of blood plasma. Increased levels of ecDNA in plasma can be found in some autoimmune diseases like systemic lupus erythematosus (SLE), rheumatoid arthritis or celiac disease which are associated with inflammatory processes. These diseases are also associated with an increased risk of osteoporosis. Bone is a dynamic structure undergoing constant modelling caused by osteoblasts, osteocytes and osteoclasts. Shifting their equilibrium can lead to pathological conditions such as osteoporosis. In this thesis we focused on elucidating whether ecDNA, an inflammatory agent with proven immunoregulatory effects can alter differentiation potential of monocytes and alternatively lead to osteoclastogenesis via TLR9. Material and methods: We obtained monocytes from peripheral blood of healthy donors and cultivated them with four types of ODNs control (CO), stimulatory (ST), inhibitory (INH, telomeric (TLM) with phosphodiester (-pO) or phosphorothioate (-pS) backbone for two weeks to establish their effect on differentiation potential of monocytes into osteoclasts. Osteoclastogenesis was evaluated by number of yielded osteoclasts observed on a light microscope. To establish the effect of ODNs on osteoclast activity samples were analysed by qPCR for...
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