title: Increased plasma levels of corticosterone and prolactin and decreased T3 and T4 levels in short-term prehepatic portal hypertension in rats.
abstract: Corticosterone, T3, T4, and prolactin serum concentrations at 24 hr (N = 10), 15 days (N = 10), and 45 days (N = 10) of postoperative (postop) evolution were assayed to study the neuroendocrine response to portal hypertension. A triple stenosing ligature of the portal vein was used as the surgical technique of portal hypertension. This technique does not produce mortality and causes a decrease in the serum concentrations of T3 (0.043 +/- 0.009 vs 0.55 +/- 0.08 ng/ml) and T4 (3.93 +/- 0.55 vs 4.65 +/- 0.67 microg/ml) and an increase in those of prolactin (28.61 +/- 20.20 vs 12.84 +/- 3.96 ng/ml) and corticosterone (397.50 +/- 64.17 vs 311.53 +/- 57.41 ng/ml) at 45 days postop. The T3, T4, prolactin, and corticosterone alterations are associated with a persistent increase of TNF-alpha and NO, whose serum concentrations at 45 days postop are, respectively, 1838.33 +/- 247.07 vs 48.89 +/- 8.75 pg/ml and 0.43 +/- 0.13 vs 0.19 +/- 0.01 mmol/ml. TNF-alpha and NO could mediate these hormonal alterations in the evolution of short-term portal hypertension in the rat; thus they are involved in the systemic neuroendocrine response that is induced by this injury.
authors.affiliation: Surgery Department and Biochemical, Faculty of Medicine, Complutense University, Madrid, Spain.
authors.forename: G
authors.initials: G
authors.lastname: Monterde
authors.forename: G
authors.initials: G
authors.lastname: Rodríguez-Fabian
authors.forename: E
authors.initials: E
authors.lastname: Vara
authors.forename: L
authors.initials: L
authors.lastname: López
authors.forename: J
authors.initials: J
authors.lastname: Arias
authors.forename: M A
authors.initials: MA
authors.lastname: Aller
authors.forename: J
authors.initials: J
authors.lastname: Arias
mesh_terms: D000818:Animals; D003345:Corticosterone / Q000097:blood*; D006975:Hypertension, Portal / Q000097:blood*; D008297:Male; D009569:Nitric Oxide / Q000097:blood; D011388:Prolactin / Q000097:blood*; D051381:Rats; D017208:Rats, Wistar; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis
chemical_list: D014409:Tumor Necrosis Factor-alpha; D014284:Triiodothyronine; D009569:Nitric Oxide; D011388:Prolactin; D013974:Thyroxine; D003345:Corticosterone