PL
Badano wpływ klindamycyny na stymulację powstawania cząsteczek adhezyjnych: ICAM-1, VCAM-1 i E-selektyny na komórkach śródbłonka naczyniowego linii HMEC-1 przez lipopolisacharydy izolowane z jednego nieenterotoksynotwórczego (NTBF) i trzech enterotoksynotwórczych (ETBF) szczepów Bacteroides fragilis oraz enterotoksynę (fragilizynę) wytworzoną przez szczep Bacteroides fragilis ATCC 43858. Stwierdzono, że klindamycyna wpływa na powstawanie cząsteczek adhezyjnych na komórkach linii spoczynkowej. Komórki stymulowane preparatami LPS Bacteroides fragilis wykazują obniżenie aktywności ICAM-1 po zadziałaniu klindamycyną. Klindamycyna podwyższa nieznacznie ICAM-1 w reakcjach po stymulacji preparatami fragilizyny. Klindamycyna podwyższa ekspresję VCAM-1 i E selektyny na komórkach linii HMEC-1 stymulowanej LPS i enterotoksyną Bacteroides fragilis.
EN
The influence of clindamycin on expression of B. fragilis endotoxins (LPS) and enterotoxin stimulated cell adhesion molecules: ICAM-1, VCAM-1 and E-selectin on HMEC-1 (human microvascular endothelial cell line) was tested. Lipopolysaccharides from four Bacteroides fragilis strains: one nonenterotoxigenic (NTBF) and three enterotoxigenic (ETBF) were extracted by hot phenol-water method and purified. B fragilis enterotoxin was prepared according to the method described by van Tassel et al. (1992). All bacterial preparations were used for stimulation at concentration 10 µg/ml. Clindamycin was used in concentration of 2 µg/ml. The influence of antimicrobial agent on the endotoxins and enterotoxin stimulation and expression of adhesion molecules was tested by ELISA, using monoclonal mouse anti-human antibodies (Genzyme, USA). Peroxidase-conjugated rabbit anti-mouse immunoglobulins (DAKO A/S Denmark) and OPD (Sigma USA) were used. The coloured reaction product was measured by reading the absorbance at 492 nm in SPECTRA II reader (SLT, Austria), It was observed that clindamycin influenced the expression of cell adhesion molecules on resting cell line. HMEC-1 cells stimulated with Bacteroides fragilis LPS preparations have suppressive effect on ICAM-1 expression. ICAM-1 expression was augmented when stimulated with Tox 1 and Tox 2 preparations. Clindamycin augmented the VCAM-1 expression in tests with all bacterial preparations. All used bacterial preparations of Bacteroides fragilis LPS and enterotoxin enhanced the expression of E-selectin with exception of LPS of NTBF strain.