Increased plasma levels of corticosterone and prolactin and decreased T3 and T4 levels in short-term prehepatic portal hypertension in rats.
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.
Monterde
G
G
Surgery Department and Biochemical, Faculty of Medicine, Complutense University, Madrid, Spain.
Rodríguez-Fabian
G
G
Vara
E
E
López
L
L
Arias
J
J
Aller
M A
MA
Arias
J
J
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
D014409:Tumor Necrosis Factor-alpha; D014284:Triiodothyronine; D009569:Nitric Oxide; D011388:Prolactin; D013974:Thyroxine; D003345:Corticosterone