TY - JOUR
T1 - Effect of cyclooxygenase-2 inhibition on renal function after renal ablation
AU - Sanchez, Pedro Lopez
AU - Salgado, Luis Miguel
AU - Ferreri, Nicholas R.
AU - Escalante, Bruno
PY - 1999/10
Y1 - 1999/10
N2 - Kidney failure is the common end of hypertension and renal diseases. Several authors have suggested that vasodilatory prostaglandins participate in the hemodynamic mechanism responsible for the development of kidney failure. However, the mechanism by which prostaglandins are increased in renal disease is not clear. Recently, 2 isoforms of the enzyme responsible for prostaglandin synthesis, cyclooxygenase, have been described as cyclooxygenase-1 (COX-1), a constitutive isoform, and cyclooxygenase-2 (COX- 2), an inducible isoform. In the present study, we investigated whether COX- 2-dependent prostaglandins participate in the evolution of renal functional changes after renal ablation. We inhibited prostaglandin synthesis by COX-1 and COX-2 with indomethacin (3 mg/kg) and prostaglandin synthesis by COX-2 with NS-398 (3 mg/kg) and tested the effect of these inhibitors on the renal functional changes elicited by renal ablation. Renal ablation produced an increase in urinary volume, protein, and prostaglandin E2, whereas urinary sodium and potassium were not affected and urinary osmolarity decreased; treatment with indomethacin or NS-398 partially prevented the renal functional changes elicited by renal ablation. Immunoblots for COX showed an increase in the expression of COX-2 protein 2 days after renal ablation. Furthermore, COX-2 mRNA expression was increased 1 day after renal ablation. These data suggest that COX-2-dependent prostaglandins participate in the renal mechanisms associated with the development of renal functional changes after renal ablation.
AB - Kidney failure is the common end of hypertension and renal diseases. Several authors have suggested that vasodilatory prostaglandins participate in the hemodynamic mechanism responsible for the development of kidney failure. However, the mechanism by which prostaglandins are increased in renal disease is not clear. Recently, 2 isoforms of the enzyme responsible for prostaglandin synthesis, cyclooxygenase, have been described as cyclooxygenase-1 (COX-1), a constitutive isoform, and cyclooxygenase-2 (COX- 2), an inducible isoform. In the present study, we investigated whether COX- 2-dependent prostaglandins participate in the evolution of renal functional changes after renal ablation. We inhibited prostaglandin synthesis by COX-1 and COX-2 with indomethacin (3 mg/kg) and prostaglandin synthesis by COX-2 with NS-398 (3 mg/kg) and tested the effect of these inhibitors on the renal functional changes elicited by renal ablation. Renal ablation produced an increase in urinary volume, protein, and prostaglandin E2, whereas urinary sodium and potassium were not affected and urinary osmolarity decreased; treatment with indomethacin or NS-398 partially prevented the renal functional changes elicited by renal ablation. Immunoblots for COX showed an increase in the expression of COX-2 protein 2 days after renal ablation. Furthermore, COX-2 mRNA expression was increased 1 day after renal ablation. These data suggest that COX-2-dependent prostaglandins participate in the renal mechanisms associated with the development of renal functional changes after renal ablation.
KW - Cyclooxygenase
KW - Kidney failure
KW - Prostaglandins
KW - Renal ablation
KW - Renal physiology
UR - http://www.scopus.com/inward/record.url?scp=0032711450&partnerID=8YFLogxK
U2 - 10.1161/01.hyp.34.4.848
DO - 10.1161/01.hyp.34.4.848
M3 - Artículo
SN - 0194-911X
VL - 34
SP - 848
EP - 853
JO - Hypertension
JF - Hypertension
IS - 4 II
ER -