scholarly journals Plasma Growth Hormone and Prolactin Response to FK 33-824, a Synthetic Opioid Agonist, in Broiler Chickens ,

1994 ◽  
Vol 73 (11) ◽  
pp. 1746-1754 ◽  
Author(s):  
F.W. EDENS ◽  
C.R. PARKHURST
Keyword(s):  
Growth Hormone ◽  
Broiler Chickens ◽  
Plasma Growth Hormone ◽  
Opioid Agonist ◽  
Prolactin Response

scholarly journals In vitro lipid metabolism, growth and metabolic hormone concentrations in hyperthyroid chickens

1992 ◽  
Vol 68 (3) ◽  
pp. 667-676 ◽  
Author(s):  
R. W. Rosebrough ◽  
J. P. McMurtry ◽  
R. Vasilatos-Younken
Keyword(s):  
Growth Hormone ◽  
Broiler Chickens ◽  
Lipid Synthesis ◽  
High Rate ◽  
Feed Consumption ◽  
Plasma Growth Hormone ◽  
Indian River ◽  
Plasma Gh ◽  
Metabolic Hormone

Indian River male broiler chickens growing from 7 to 28 d of age were fed on diets containing energy: protein values varying from 43 to 106 MJ/kg protein and containing 0 or 1 mg triiodothyronine (T3)/kg diet to study effects on growth, metabolic hormone concentrations and in vitro lipogenesis. In vitro lipid synthesis was determined in liver explants in the presence and absence of ouabain (Na+, K+-transporting ATPase (EC 3.6.1.37) inhibitor) to estimate the role of enzyme activity in explants synthesizing lipid. Growth and feed consumption increased (P < 0.01) when the energy: protein value decreased from 106 to 71 MJ/kg protein; however, both variables decreased as the value was further decreased from 53 to 43 MJ/kg protein. Triiodothyronine depressed (P < 0.01) growth, but not food intake. Large energy:protein diets (> 53 MJ/kg protein) and dietary T3 lowered (P < 0.01) plasma growth hormone. Large energy:protein diets (> 53 MJ/kg protein) increased (P < 0.01) lipogenesis, plasma growth hormone (GH) and decreased plasma insulin-like growth factor 1 (IGF-1). Also, T3 decreased plasma GH, IGF-1 in vitro lipogenesis. Ouabain inhibited a greater proportion of in vitro lipogenesis in those explants synthesizing fat at a high rate. Both dietary T3 and in vitro ouabain decrease lipogenesis, but, when combined, the effects are not cumulative

Effect of Dopamine on Plasma Growth Hormone and Prolactin Concentrations under Anaesthesia

1988 ◽  
Vol 16 (6) ◽  
pp. 403-412 ◽  
Author(s):  
K. Mikawa ◽  
M. Kusunoki ◽  
H. Obara ◽  
S. Iwai
Keyword(s):  
Growth Hormone ◽  
General Anaesthesia ◽  
Dopamine Receptors ◽  
Anterior Pituitary ◽  
Plasma Prolactin ◽  
Plasma Growth Hormone ◽  
Prolactin Response

Five patients with acromegaly and five patients with prolactinoma undergoing general anaesthesia were studied. Concentrations of plasma growth hormone in patients with acromegaly and concentrations of plasma prolactin in patients with prolactinoma were measured before anaesthesia, when 250 mg levodopa was administered orally, and after anaesthesia when dopamine was infused intravenously at a rate of 5 μg/kg-min. There was no difference in hormonal (growth hormone or prolactin) response to either treatment in the anaesthetized and the awake states. These findings indicate that the functioning of dopamine receptors in the anterior pituitary is not affected by anaesthesia.

scholarly journals Growth Performance and Concentrations of Thyroid Hormones and Growth Hormone in Plasma of Broilers at High Temperatures

1987 ◽  
Vol 40 (4) ◽  
pp. 443 ◽  
Author(s):  
A P Sinurat ◽  
D Balnave ◽  
GH McDowell
Keyword(s):  
Growth Hormone ◽  
High Temperature ◽  
Plasma Concentration ◽  
High Temperatures ◽  
Broiler Chickens ◽  
High Ambient Temperature ◽  
Molar Ratio ◽  
Maximum Temperature ◽  
Food Conversion ◽  
Plasma Growth Hormone

Responses of broiler chickens to a high ambient temperature (35�C) were measured in two experiments. In one experiment temperatures were increased abruptly from 21�C to a daily range of 21-35�C whereas, in the other, temperatures were increased more gradually over 6 days. The high temperatures were maintained for 5 h/day. In' both experiments, birds exposed to the high temperatures ate less food and gained less liveweight than birds maintained at 21�C. Efficiency of food conversion to liveweight gain and body composition were not affected by high temperature but there was a tendency for thyroid weight to decrease. Overall, the plasma concentration of triiodothyronine (T 3) decreased and the plasma concentration of thyroxine (T4) increased, resulting in a decreased T/T4 molar ratio, during exposure to high temperature. The concentration of plasma growth hormone, but not plasma reverse T 3' was increased by high temperature. The initial responses to increased temperature were variable, with birds exposed more gradually adjusting relatively well until the maximum temperature was increased to 35�C. All heated birds readjusted quickly to the daily reduction in temperature to 21�C.

Single and repeated testing of growth hormone secretory capacity in hypopituitarism using growth hormone releasing factor

1986 ◽  
Vol 113 (4_Suppl) ◽  
pp. S118-S122 ◽  
Author(s):  
O. BUTENANDT ◽  
M. EMMLINGER ◽  
H. DOERR
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Pituitary Gland ◽  
Bolus Injection ◽  
Hormone Deficiency ◽  
Test Results ◽  
Repeated Testing ◽  
Plasma Growth Hormone ◽  
Once Daily ◽  
Secretory Capacity

Abstract 38 patients with proven growth hormone deficiency (GHD) and 19 children with familial short stature received an iv GRF-bolus injection of 1 ug/kg body weight. Whereas in all control children plasma growth hormone rose significantly (mean of maximal values 36 ng/ml), only 7 out of 38 patients with GHD reached peak values of 8 ng/ml or more. GRF-priming by 1 ug GRF/kg BW given once daily s.c. for 5 days in 19 patients improved the response of the pituitary gland in 11. Thus, following the first GRF test, only 21 % of patients demonstrated function of the pituitary gland whereas 45 % did so when all test results are combined. To evaluate the pituitary function in patients with GHD correctly, GRF tests following a GRF priming period seems to be necessary to reactivate atrophic somatotropic cells of the pituitary gland.

Effect of Growth Hormone-Releasing Factor on Plasma Growth Hormone, Prolactin and Somatomedin C in Hypopituitary and Short Normal Children

1985 ◽  
Vol 22 (1-2) ◽  
pp. 32-45 ◽  
Author(s):  
Guy Van Vliet ◽  
Dani&egrave;le Bosson ◽  
Claude Robyn ◽  
Margareta Craen ◽  
Paul Malvaux ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Plasma Growth Hormone ◽  
Normal Children ◽  
Somatomedin C ◽  
Growth Hormone Releasing Factor
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