TY - JOUR
T1 - Effect of acute and chronic inflammation on plasma growth hormone levels in rats
AU - Corsi, M. M.
AU - Fulgenzi, A.
AU - Gaja, G.
AU - Falchi, M.
AU - Bertelli, A. A E
AU - Boctelli, A. A E
AU - Ferrero, M. E.
PY - 1997
Y1 - 1997
N2 - We investigated the effect of acute and chronic stress on growth hormone (GH) plasma levels in rats. Acute stress was provoked by intravenous administrations of IL-1β and TNF-α. Determinations were made at 10, 30, 60, 120 and 180 min following i.v. injection of these cytokines into the caudal vein. We also investigated the chronic stress induced by hind paw injections of Freund's adjuvant. Arthritis was developed by 21 days following such injection. GH levels were studied at 7, 14 and 21 days after induction of arthritis on several blood samples which were withdrawn from tail veins, and long-term hormonal profiles (3 hours' sampling) were determined at 12.00 am, 1.30 pm and 3.00 pm. Local administration of dexamethasone and the monoclonal antibody anti-ICAM-1 were also used in arthritic rats. Following acute stress, a significant reduction of plasma GH levels has been evidenced, possibly related to the stimulation of corticotropin-releasing hormone. Following chronic stress, we demonstrated a significant increase of GH levels, which were significantly reduced by dexamethasone treatment, and to a lesser extent by anti-ICAM-1 administration.
AB - We investigated the effect of acute and chronic stress on growth hormone (GH) plasma levels in rats. Acute stress was provoked by intravenous administrations of IL-1β and TNF-α. Determinations were made at 10, 30, 60, 120 and 180 min following i.v. injection of these cytokines into the caudal vein. We also investigated the chronic stress induced by hind paw injections of Freund's adjuvant. Arthritis was developed by 21 days following such injection. GH levels were studied at 7, 14 and 21 days after induction of arthritis on several blood samples which were withdrawn from tail veins, and long-term hormonal profiles (3 hours' sampling) were determined at 12.00 am, 1.30 pm and 3.00 pm. Local administration of dexamethasone and the monoclonal antibody anti-ICAM-1 were also used in arthritic rats. Following acute stress, a significant reduction of plasma GH levels has been evidenced, possibly related to the stimulation of corticotropin-releasing hormone. Following chronic stress, we demonstrated a significant increase of GH levels, which were significantly reduced by dexamethasone treatment, and to a lesser extent by anti-ICAM-1 administration.
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M3 - Article
C2 - 9403272
AN - SCOPUS:0031350317
VL - 23
SP - 117
EP - 122
JO - Drugs under Experimental and Clinical Research
JF - Drugs under Experimental and Clinical Research
SN - 0378-6501
IS - 3-4
ER -