FIGURE 5.
E-prostanoid receptor EP1 and EP4 may be responsible for prorenin-renin upregulation after subsequent stimulation of the (pro)renin receptor (PRR) mediating cyclooxygenase-2 (COX-2) upregulation during the late phase. M-1 cells were incubated with prostaglandin E2 (PGE2) 1 μmol and co-incubated with EP1 and EP4 antagonists at doses shown in the figure. As observed, both antagonists were able to prevent prorenin and renin upregulation. *P < 0.05 vs. vehicle (Veh), n = 6.