“Cellular accumulation of LVFX was inversely increased when guanidine suppressed the appearance of LVFX in the apical medium in a concentration-dependent manner.”
“ Guanidine trans-stimulated the efflux of LVFX from LLC-PK1 cells but did not affect cimetidine efflux.”
“ LVFX permeation in the basal-to-apical direction was significantly reduced in the presence of guanidine , enoxacin, and L-arginine, whereas tetraethylammonium, D-arginine, D- and L-lysine had no effect on the basal-to-apical permeation of LVFX.”
“These results imply that the inhibitory effect of guanidine on the basal-to-apical permeation of LVFX involves the permeation process across the apical membrane.”