Fig. 3.
A: rat preglomerular vascular smooth muscle cells were incubated for 1 h with various concentrations of guanosine (0, 10, or 30 μmol/l) without and with adenosine 5′-monophosphate (AMP; 10 μmol/l). B: rat preglomerular vascular smooth muscle cells were incubated for 1 h with various concentrations of GMP (0, 10, or 30 μmol/l) without and with AMP (10 μmol/l). C: rat preglomerular vascular smooth muscle cells were incubated for 1 h with various concentrations of guanosine 3′,5′-cyclic monophosphate (cGMP; 0, 10, or 30 μmol/l) without and with AMP (10 μmol/l). For A–C, the medium was assayed for adenosine by mass spectrometry. Values represent means ± SE.