Bacteria may adopt various strategies to enhance the resistance to antibiotics, including the following: efflux pumps that can remove therapeutic levels of antibiotics; drug degradation or modification; reduced membrane permeability; altered target sites or metabolic pathway (reviewed by [21]).
Evolution in bacteria results in the development of various complex resistance mechanisms to neutralize the bactericidal effect of antibiotics, like drug amelioration, target modification, membrane permeability reduction, and drug extrusion through efflux pumps.
This modification of permeability could enhance the activity of antibiotics that act within the cell, such as the aminoglycosides.
The myb96-1 mutalsoalso displayed a slight modification of permeability as indicated by the toluidine blue and Calcofluor white test, but this modification was not detected with the chlorophyll leakage test.
In reality, each molecule of the core and its periphery may confer a host of compartment level effects, e.g. modification of permeability of the membrane, specific metabolic adaptations, etc. that could have a compartment level fitness effect, but this is not explicitly modelled here.
In principle, this result might be due to an ill-defined participation of the chloride current to the overall synaptic current, or to a modification of the permeability of the nicotinic channel.
Modification or cellular translocation of the tight junction molecules ZO1 and several claudins have indeed been observed in inflammatory bowel disease (IBD) and chronic non-steroidal anti-inflammatory drugs (NSAIDs) use, both characterized by increased intestinal permeability [ 11, 12].
No modification or extra equipment is needed.
Modification of intestinal permeability either directly by tight junction modulators or indirectly via environmental factors like bioactive peptides, prebiotics or probiotics [ 8] could be a promising approach to the development of a whole new field of therapeutic strategies to prevent or treat autoimmune diabetes.
Their passage through the endothelial cell monolayer was three- or four-fold higher than that of uncoated nanoparticles, without any modification of paracellular permeability, suggesting that the enhancement was mediated by the BBB choline transporter.
