Table 1.

Effect of ouabain on intracellular Na⁺ and K⁺ content in human (HASMC, HUVEC) and rat (RASMC, RAEC) cells

Type of cells	Ouabain, μM	Intracellular Na+ (nmol/mg protein)	Intracellular K+ (nmol/mg protein)
HASMC	0	64±20	1211±60
	3	701±38*	108±11*
	3000	766±90*	132±38*
HUVEC	0	114±24	1311±89
	3	978±53*	133±20*
	3000	1016±97*	129±8*
RASMC	0	111±23	1211±93
	3	178±11	1097±68
	3000	876±71*	156±27*
RAEC	0	56±8	722±59
	3	69±12	693±82
	3000	766±54*	86±21*

Cells were incubated in DMEM medium with or without ouabain for 6 h. Means ± S.E. from experiments performed in triplicates are shown.

^*p<0.001 compared to ouabain-free medium.