CHANGES IN SOMATOMEDIN-LIKE ACTIVITY AND GROWTH HORMONE CONCENTRATIONS IN THE PLASMA OF THE DOMESTIC FOWL (GALLUS DOMESTICUS )

1981 ◽  
Vol 59 (5) ◽  
pp. 629-638 ◽  
Author(s):  
J Falconer ◽  
S Harvey ◽  
JM Forbes ◽  
CG Scanes
Keyword(s):  
Growth Hormone ◽  
Domestic Fowl ◽  
Gallus Domesticus

Effect of synthetic thyrotrophin-releasing hormone and its analogues on growth hormone secretion in the domestic fowl (Gallus Domesticus)

1981 ◽  
Vol 97 (4) ◽  
pp. 448-453 ◽  
Author(s):  
C. G. Scanes ◽  
S. Harvey ◽  
B. A. Morgan ◽  
M. Hayes
Keyword(s):  
Growth Hormone ◽  
Domestic Fowl ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Gallus Domesticus ◽  
Plasma Growth Hormone ◽  
Thyrotrophin Releasing Hormone ◽  
Releasing Hormone ◽  
Gh Secretion ◽  
Trh Analogues

Abstract. Variations in plasma growth hormone (GH) concentrations following iv or sc administration of synthetic thyrotrophin-releasing hormone (TRH, Pyr-His-Pro-NH2) have been followed in immature and adult domestic fowl. TRH markedly stimulated GH secretion in newly hatched (1 and 2 day old) chicks and in 6-week-old cockerels but in adult male or female birds of two strains had very little effect, if any. Intravenous injection of 4 TRH analogues (Pyr-His-Mep-NH2, Pyr-Meh-Mep-NH2, Pyr-Meh-Mep-NH and Pyr-Meh-Pro-NH2) were also potent GH secretagogues in 6-week-old birds. The stimulatory effect of TRH or the TRH-analogues on GH secretion was not dose-related.

INFLUENCE OF FASTING, GLUCOSE AND INSULIN ON THE LEVELS OF GROWTH HORMONE AND PROLACTIN IN THE PLASMA OF THE DOMESTIC FOWL (GALLUS DOMESTICUS)

1978 ◽  
Vol 76 (3) ◽  
pp. 501-506 ◽  
Author(s):  
S. HARVEY ◽  
C. G. SCANES ◽  
A. CHADWICK ◽  
N. J. BOLTON
Keyword(s):  
Growth Hormone ◽  
Carbohydrate Metabolism ◽  
Domestic Fowl ◽  
Fasting Glucose ◽  
Gallus Domesticus ◽  
Consistent Effect

The concentrations of both GH and prolactin in the circulation of the domestic fowl have been determined after various treatments known to affect carbohydrate metabolism. Fasting decreased the level of glucose, stimulated the secretion of GH and inhibited the secretion of prolactin. Administration of insulin significantly depressed the level of GH in the plasma of normal or fasted birds and also in chickens which had received simultaneous injections of glucose or 2-deoxy-d-glucose. No consistent effect of insulin on the secretion of prolactin was observed. Hyperglycaemia subsequent to administration of glucose had no effect on the levels of either GH or prolactin. Glucagon-induced hyperglycaemia suppressed the level of GH in the plasma and stimulated that of prolactin.

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