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EN
Multipotent mesenchymal stromal cells also known as mesenchymal stem cells according to the signal from the damaged tissue have the ability to differentiate into several types of specialized cells forming tissues of mesodermal origin such as bone, cartilage, tendon, skeletal muscle or adipose tissue. This ability of MSC is used in regenerative medicine. For the clinical and experimental purposes in order to increase the amount of MSC their ability to proliferate in vitro is used. The best-known source of mesenchymal stem cells is the adipose tissue and bone marrow which is the most common source material used for primary culture. This paper presents the next steps of culturing mesenchymal stem cells in vitro.
EN
Objectives: The aim of the study was to evaluate the influence of acetylsalicylic acid (ASA) on benzene hematotoxicity in rats. Materials and Methods: The study was carried out on rats exposed for 2, 4 and 8 weeks to benzene vapour at a conentration of 1.5 or 4.5 mmol/m³ of air (5 days per week, 6 hours per day) alone or together with ASA at the doses of 5, 150 or 300 mg/kg body weight (per os). Results: Benzene at a concentration of 4.5 mmol/m³ caused a slight lymphopenia, granulocytosis and reticulocytosis in blood. In bone marrow traits of megaloblastic renewal, presence of undifferentiated cells and giant forms of granulocytes as well as an increase in myeloperoxidase and decrease in chloroacetate esterase activity and lipids content were noted. ASA (150 and 300 mg/kg b.w.) influenced some of hematological parameters, altered by benzene intoxication. ASA limited the solvent-induced alteration in blood reticulocyte count and in the case of bone marrow in the erythroblasts count. Traits of megaloblastic renewal in bone marrow were less pronounced. Besides, higher activity of myeloperoxidase and the decrease in the level of lipids in granulocytes were noted. Conclusion: Our results suggest that ASA limited the benzene-induced hematotoxicity.
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