Investigation of effect of boron on endotoxine-induced leukocyte function and following free radical condition


Thesis Type: Postgraduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2013

Student: SİBEL ÇONGARALI

Supervisor: KANUNİ BARBAROS BALABANLI

Abstract:

Inflammation is cellular and humeral response to damage caused by microorganisms, physical or chemical factors. Being local, it is characterized by symptoms such as fever, rush, swelling, limited mobility and pain. Detrimental agents are restrained and eased to be suppressed by inflammation. Many cells and secreted matters, in particular leukocytes, are active in initiation and duration of inflammation and completion of the cell restoration. These matters are generally in polypeptide form and called as cytokines whose most important types are interleukins (IL) and tumor necrosis factor alpha (TNF-alpha). Elimination of pathogens which induces inflammation, was secured by phagocytosis. Phagocytic cells have both Oxygen-dependent and Oxygen-independent mechanisms to shatter detrimental agents (pathogens). Oxygen dependent mechanisms include myeloperoxidase (MPO) system. As possessed the major resources, Boron is important element for Turkey. Extended usage area of Boron yields high rate of exposure all over. Boron is considered having many effects on living organisms. Influence of boron on endotoxin induced leukocyte function and free radical condition under inflammation has been aimed. For this purpose; 3 experimental groups are formed (Boron+Endotoxin, Endotoxin and Control) with 6 rats in each. Boron+endotoxin group has been exposed to 100 mg/kg boric acid for 28 days by oral gavage. Inflammation was induced by 4 mg/kg lipopolysaccharide (endotoxin/LPS) as intraperitoneal (ip) in both boron+endotoxin and endotoxin groups. While TNF-alpha, IL-6 amounts were assessed via ELISA, SOD and MPO contents were determined spectrophotometrically. As compared to control group, TNF-alpha concentration decreased in samples of endotoxin and boron+endotoxin group while there was no significant difference in IL-6. SOD concentration increased in boron+endotoxin group relative to endotoxin group whose SOD level was also below control group. MPO concentration of boron+endotoxin group was high when compared to other two groups. Results shows Boron is anticipated having no remarkable influence on TNF-alpha and IL-6 levels. However; increase in SOD concentration points that boron enhances free radical production as a regulator. Elevation in MPO level may be explained by positive and adaptive effect on abating infected agents by phagocytosis.