title: Role of eicosanoids of the contralateral kidney in maintenance of two-kidney, one-clip renovascular hypertension in rats.
abstract: OBJECTIVE
  To elucidate the role of the eicosanoids prostaglandin E(2) (PGE(2)), 6-keto-prostaglandin F(1a) (PGF(1a)) and thromboxane B(2) (TXB(2)) in the maintenance of two-kidney, one-clip renovascular hypertension in rats.
  
  
  METHODS
  The right renal artery was constricted by a silver clip in 63 male Sprague-Dawley rats to induce hypertension, while a sham operation was performed in 17 control rats. Six months after the induction of hypertension, nephrectomy of the clipped kidney was performed. Nephrectomy was followed by a period of high sodium intake. Blood pressure and eicosanoid excretion were measured before and after nephrectomy of the clipped kidney, as well as during high sodium intake.
  
  
  RESULTS
  During the chronic phase of Goldblatt hypertension, the amount of vasoconstrictive TXB(2) excreted by the contralateral kidney increased compared to that in the controls, whereas PGE(2) excretion was unaffected. Eicosanoid excretion before and after removal of the clipped kidney did not differ between post-Goldblatt hypertensive and post-Goldblatt normotensive animals. During the period of high sodium intake, PGE(2) excretion increased only in control rats, being unaltered in Goldblatt hypertensive rats.
  
  
  CONCLUSIONS
  In the chronic phase of two-kidney, one-clip renovascular hypertension, the contralateral kidney of post-Goldblatt hypertensive and post-Goldblatt normotensive rats excretes more vasoconstrictive thromboxane in comparison to controls, whereas excretion of vasodilatory prostaglandin is not elevated. However, increased TXB(2) excretion and the absence of an increase in PGE(2) excretion from the contralateral kidney do not appear to be important for the maintenance of high blood pressure in this model of renovascular hypertension.
authors.affiliation: Departments of Urology, University of Thrace, Alexandroupolis, Greece. chkalaitzis@hotmail.com
authors.forename: Christos
authors.initials: C
authors.lastname: Kalaitzis
authors.forename: Stilianos
authors.initials: S
authors.lastname: Giannakopoulos
authors.forename: Thrasyboulos
authors.initials: T
authors.lastname: Pantazis
authors.forename: Ploumis
authors.initials: P
authors.lastname: Pasadakis
authors.forename: Stavros
authors.initials: S
authors.lastname: Touloupidis
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D015232:Dinoprostone / Q000494:pharmacology; D015777:Eicosanoids / Q000494:pharmacology*; D006978:Hypertension, Renovascular / Q000139:chemically induced / Q000473:pathology*; D007668:Kidney / Q000187:drug effects* / Q000473:pathology*; D008297:Male; D009392:Nephrectomy; D011460:Prostaglandins F / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D012982:Sodium, Dietary; D013929:Thromboxane B2 / Q000494:pharmacology
chemical_list: D015777:Eicosanoids; D011460:Prostaglandins F; D012982:Sodium, Dietary; D013929:Thromboxane B2; D015232:Dinoprostone; C100006:prostaglandin F1