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Due to its availability and accessibility, adipose tissue has been the subject of various studies in many different medical fields and is believed to be a useful source of stem cells. The ability of ASCs to differentiate towards different cell lineages, with possibility of directing this differentiation, increases their possible clinical applications, and they have been widely employed in multiple therapies and treatment of different pathologies. However, a deeper understanding of the molecular mechanisms underlying the ASCs osteoblastic and chondrocyte differentiation may lead to novel applications treating a multitude of different bone-related diseases through techniques more likely meeting worldwide consensus. In this study, the RT-qPCR method was used to determine the changes in expression of ASC specific markers (CD105, CD73, CD14, CD34, CD90 and CD45) before and after long-term (14-day)  in vitro  cultures. To confirm the identity of the investigated cells, flow cytometry was used to evaluate the presence of positive (CD44, CD90) and negative (CD45, CD34) ASC markers. Overall, the results of the PCR analysis showed a significant change in expression of most of the marker genes, indicating significant changes in the cultured cells caused by their long-term culture, potentially altering their original stem-like characteristics. Running title : ASC marker expression during long-term  in vitro  culture

qPCR analysis of mesenchymal stem cell marker expression during the long-term culture of canine adipocyte derived stem cells