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The effect of dilazep on F10 cells in vitro
No full textExperiments on F10 cell growth, colony ability, cell adhesion and ultramorphology at SEM have been performed. The effect of Dilazep (DIL) has been compared with that of well known modulating agents such as Flunarizine (FLU) and Verapamil (VER) on cells cultured in high Ca++ medium (HCM) and in low calcium medium (LCM). While in HCM there is no difference among the three drugs, FLU and VER had a stronger effect on cell growth inhibition in LCM. Cell adhesion to the growth substratum, evaluated by the technique of spontaneous detachment in culture medium, is reduced in DIL treated cells in comparison to the controls
Increased spontaneous cell detachment of F10 cells induced in vitro by some calcium-channel blockers
No full textWe investigated the action of some Ca++-channel blockers such as flunarizine, nifedipine and verapamil on F10 cells in vitro. Cell adhesion to the growth substratum, evaluated by the technique of spontaneous detachment in culture medium, is reduced in Ca++-channel blocker treated cells by comparison with controls. In our opinion such an event could also explain the inhibitory effect on cell growth and colony forming ability
Increased spontaneous cell detachment of F10 cells induced in vitro by some calcium-channel blockers
No full textWe investigated the action of some Ca(++)-channel blockers such as flunarizine, nifedipine and verapamil on F10 cells in vitro. Cell adhesion to the growth substratum, evaluated by the technique of spontaneous detachment in culture medium, is reduced in Ca(++)-channel blocker treated cells by comparison with controls. In our opinion such an event could also explain the inhibitory effect on cell growth and colony forming ability
Comparison of the antibacterial activity and synergistic activity towards antibiotics of different mammalian sera
No full textThe antibacterial activity against Escherichia coli ATCC 10798 and Staphylococcus aureus Mag 90 of normal sera from nine species of mammals was investigated by Avantage (Abbott). Human and rat sera showed the highest antibacterial activity against E. coli ATCC 10798, while all investigated sera did not exhibit, till the maximum concentration tested (20%), spontaneous antibacterial activity against S. aureus mag 90. Heat inactivated sera (56°C for 30 min) of all investigated species lost their antibacterial activity, but maintained their synergistic effect with sub-MICs of some antibacterial drugs, principally against E. coli ATCC 10798
Serum concentrations of sodium 2-mercaptoethanesulfonate (MESNA) and its metabolite, disulfide form (DIMESNA), in volunteers after oral dosing: a comparison between MESNA and ARGIMESNA.
No full textEffects of MESNA and ARGIMESN
Comparison of the antibacterial activity and synergistic activity towards antibiotics of different mammalian sera
No full textThe antibacterial activity against Escherichia coli ATCC 10798 and Staphylococcus aureus Mag 90 of normal sera from nine species of mammals was investigated by Avantage (Abbott). Human and rat sera showed the highest antibacterial activity against E. coli ATCC 10798, while all investigated sera did not exhibit, till the maximum concentration tested (20%), spontaneous antibacterial activity against S. aureus Mag 90. Heat inactivated sera (56 degrees C for 30 min) of all investigated species lost their antibacterial activity, but maintained their synergistic effect with sub-MICs of some antibacterial drugs, principally against E. coli ATCC 10798
Study on the bactericidal activity and synergistic effect of neutropenic rat serum with gentamicin
No full textIt is well known that normal rat serum (NRS) shows an antibacterial activity because of the presence of endogenous substances that are able to express a defence against pathogenic microorganisms. Moreover, in former studies, we observed that NRS presents a synergistic activity with some antibiotics (thus able to lower minimum inhibitory concentration values). The aim of this research was to study the antibacterial activity and synergistic effect of neutropenic rat sera (NPRS) with gentamicin. The animals were made neutropenic by the i.p. injection of cyclophosphamide (100 mg/kg on day 0 and 75 mg on day 4). At all tested concentrations (from 0.25% to 5%) NPRS showed lower antibacterial activity than NRS with differences which were always statistically significant. The synergistic activity of NPRS with gentamicin was still present and quite similar to that of NRS, in spite of many altered blood parameters showing evident immunodepression. Some possible interpretations of these results are discussed
Possible influence of assay methods in studies of the pharmacokinetics of antibiotics
No full textIn the present research, levels of gentamicin (GM) in serum and carrageenan pleural exudate from the rat have been compared, using three evaluation methods: microbiological assay (MA), enzyme-immunoassay (EMIT) and fluorescence-immunoassay (TDX). In a first study, the evaluations carried out by MA and EMIT have furnished comparable data in serum, while statistically significant differences were verified at all times in pleural exudate. On the contrary, in a second study, while the evaluations carried out by MA and EMIT, at all times and in both biological fluids, have produced similar data, the evaluation carried out by TDX consistently supplied higher results, with statistically significant differences at some times (5 min and 60 min for serum, 30 min and 60 min for exudate). Some possible interpretations of these results are discussed
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