GROWTH HORMONE RELATED TO INSULIN AND SUGAR IN NOCTURNAL BLOOD PLASMA OF LACTATING COWS

1976 ◽  
Vol 82 (4) ◽  
pp. 767-773 ◽  
Author(s):  
K. Halse ◽  
Anne Kristine Blom ◽  
K. Hove
Keyword(s):  
Growth Hormone ◽  
Blood Plasma ◽  
Immunoreactive Insulin ◽  
Plasma Samples ◽  
Plasma Growth Hormone ◽  
Lactating Cows ◽  
High Insulin ◽  
Plasma Immunoreactive Insulin ◽  
Correlation Tests ◽  
Lactation Cycle

ABSTRACT Nocturnal blood plasma samples from about 190 indoor-fed cows at varying stages of the lactation cycle showed wide variations in the concentrations of sugar (43–88 mg/100 ml) and acetoacetate (0.12–8.7 mg/100 ml). Plasma immunoreactive insulin decreased and acetoacetate increased with decreasing sugar. Plasma growth hormone (GH) was significantly correlated to insulin (r = −0.24, P < 0.001) and to sugar (r = −0.15, P < 0.05), but not to acetoacetate (r = +0.13). Since the plasma level of GH in bovines is known to vary widely from hour to hour, individual cows are poorly represented by single determinations of the hormone. However, in accordance with the results from the correlation tests, different GH averages, about 11 and 9 ng/ml, were found for groups of animals with plasma sugar respectively below and above 70 mg/100 ml. By subgrouping according to insulin levels within sugar ranges, categories could be singled out with GH averages as different as 12.7 ng/ml (low sugar - low insulin) and 8.3 ng/ml (high sugar - high insulin). The findings are consistent with the view that GH is involved in the regulation of energy metabolism in bovines. But no support has been provided for the hypothesis of GH hypersecretion as a cause of ketosis in cows.

Relation of concentration of growth hormone in blood plasma to growth rate and carcass characteristics in the pig

1975 ◽  
Vol 20 (1) ◽  
pp. 51-61 ◽  
Author(s):  
R. J. Chappel ◽  
A. C. Dunkin
Keyword(s):  
Growth Hormone ◽  
Growth Rate ◽  
Blood Plasma ◽  
Relative Growth Rate ◽  
Correlation Coefficients ◽  
Carcass Characteristics ◽  
Plasma Samples ◽  
Hormone Concentration ◽  
Plasma Growth Hormone ◽  
Relative Growth

SUMMARY1. Pig growth hormone (PGH) concentrations were measured in plasma samples from piglets of 3–4 to 7–8 weeks of age.2. Plasma PGH concentrations decreased significantly with age. No difference was observed between the hormone concentrations of gilts and barrows.3. Correlation coefficients were calculated between mean plasma growth hormone concentration over a 4-week period and several carcass characteristics and measures of growth rate. Plasma PGH over this period showed significant negative correlations with several measures of carcass backfat thickness at bacon weight. In barrows only, PGH concentrations showed a significant direct correlation with relative growth rate from 3 to 7 weeks.

CHANGES IN PLASMA GROWTH HORMONE AND INSULIN OF THE HUMAN FOETUS FOLLOWING HYSTEROTOMY

1971 ◽  
Vol 66 (4) ◽  
pp. 577-586 ◽  
Author(s):  
R. C. Turner ◽  
B. Schneeloch ◽  
P. Paterson
Keyword(s):  
Growth Hormone ◽  
Plasma Insulin ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Immunoreactive Insulin ◽  
Plasma Growth Hormone ◽  
Plasma Insulin Concentration ◽  
Plasma Immunoreactive Insulin ◽  
The Mean ◽  
Serial Samples

ABSTRACT Plasma immunoreactive insulin and growth hormone of 20–24 weeks' gestation human foetuses were assayed in serial samples following delivery by hysterotomy. The mean umbilical cord plasma growth hormone concentration was 71 ng/ml (range 13–120 ng/ml) and the mean plasma insulin was 5 μU/ml (range 2–8 μU/ml). Following delivery the growth hormone levels increased, but there was no significant change in plasma insulin concentration. The hypothalamic-hypophyseal axis controlling growth hormone secretion appears to be developed by 20 weeks' gestation, and »stress« appears to be a provocative stimulus.

DIFFERENT EFFECTS OF EXOGENOUS CYCLIC ADENOSINE MONOPHOSPHATE AND ITS DIBUTYRYL DERIVATIVE ON PLASMA GROWTH HORMONE, GLUCOSE, INSULIN AND CORTISOL

1976 ◽  
Vol 83 (1) ◽  
pp. 15-25
Author(s):  
M. Vanderschueren-Lodeweyckx ◽  
W. Proesmans ◽  
E. Eggermont ◽  
R. Eeckels
Keyword(s):  
Growth Hormone ◽  
Hormone Secretion ◽  
Growth Hormone Secretion ◽  
Cyclic Adenosine Monophosphate ◽  
Adenosine Monophosphate ◽  
Normal Subjects ◽  
Immunoreactive Insulin ◽  
Plasma Growth Hormone ◽  
Hormone Levels ◽  
The Mean

ABSTRACT The effects of the infusion in four different dosages (0.001, 0.005, 0.02 and 0.2 mg/kg/min during 60 min) of cyclic 3′,5′-adenosine monophosphate and of its dibutyryl derivative on plasma growth hormone and on glucose, immunoreactive insulin and cortisol were studied in 38 normal subjects and in 10 patients with idiopathic hypopituitarism. In normal subjects cyclic 3′,5′-adenosine monophosphate provokes an increase in plasma growth hormone levels (only when a dosage of 0.2 mg/kg/min is used) without any changes in plasma glucose, insulin and cortisol. The maximal value of the means is observed 75 min after starting the infusion. Dibutyryl cyclic 3′,5′-adenosine monophosphate (0.2 and 0.02 mg/kg/min) provokes a dose-related rise in plasma growth hormone levels which is always preceded by hyperglycaemia and hyperinsulinaemia. The peak of the mean growth hormone levels occurs at 135 min after initiation of the infusion. In all but one hypopituitary patients the nucleotides do not promote growth hormone secretion. It is concluded that exogenous cyclic 3′,5′-adenosine monophosphate and its dibutyryl derivative may not be considered as analogous and that both compounds may contribute to study growth hormone release in normal subjects and in patients with growth abnormalities.

Interassay Differences in Growth Hormone Measurement in Acromegaly

1997 ◽  
Vol 34 (2) ◽  
pp. 156-159 ◽  
Author(s):  
J H Barth ◽  
J H Smith ◽  
P Clarkson
Keyword(s):  
Growth Hormone ◽  
Mean Value ◽  
Consistent Difference ◽  
Plasma Samples ◽  
Plasma Growth Hormone ◽  
Gh Isoforms ◽  
The Mean ◽  
Good Agreement

We measured plasma growth hormone concentrations by three different two-site immunometric assays (Pharmacia hGH RIA, IDS Gamma-BCT and Delfia 22 kDa hGH) to determine whether there are GH isoforms secreted by acromegalic patients that are under-recognized by some assays. There was a fairly good agreement between assays with the IDS Gamma-BCT and Delfia 22 kDa assays giving lower results than the Pharmacia IRMA. GH was measured on stored plasma samples from 24 patients with proven acromegaly. There was a consistent difference between the three assays of approximately 20% of the mean value for each patient.

scholarly journals Effect of Synthetic Human Pancreatic Growth Hormone-Releasing Factors on Plasma Growth Hormone Concentrations in Lactating Cows

1984 ◽  
Vol 67 (12) ◽  
pp. 2881-2886 ◽  
Author(s):  
Stuart N. McCutcheon ◽  
Dale E. Bauman ◽  
William A. Murphy ◽  
Valentine A. Lance ◽  
David H. Coy
Keyword(s):  
Growth Hormone ◽  
Plasma Growth Hormone ◽  
Pancreatic Growth ◽  
Lactating Cows ◽  
Releasing Factors

PLASMA GROWTH HORMONE RESPONSE TO VASOPRESSIN:

1970 ◽  
Vol 63 (2) ◽  
pp. 359-377 ◽  
Author(s):  
H.-J. Quabbe
Keyword(s):  
Growth Hormone ◽  
Median Eminence ◽  
Anterior Pituitary ◽  
Immunoreactive Insulin ◽  
List Type ◽  
Plasma Growth Hormone ◽  
Operative Removal ◽  
Provocation Tests ◽  
Males And Females ◽  
Male Subjects

ABSTRACT Plasma growth hormone (HGH) was determined in 12 normal volunteers during intravenous (iv) infusion of synthetic lysine-8-vasopressin (VP). Eight volunteers received only saline infusions but expected all the possible side effects of VP infusion. Significant increases in HGH occurred more often in females than in males during VP infusion. In the females, there was no apparent correlation between the HGH response and stress. Six patients with endocrinologically inactive intrasellar tumours with suprasellar extension and one patient with a suprasellar meningioma were studied with VP and with hypoglycaemia tests. None of the patients responded to VP infusion with an increase in HGH. Only the meningioma patient responded to hypoglycaemia. One patient did not respond to hypoglycaemia before, but responded after operative removal of the suprasellar part of the tumour. Responses of urinary 17-OHCS in metyrapone tests and of plasma cortisol during VP infusion were positive in several of the patients, demonstrating preservation of blood flow from the stalk median eminence to the anterior pituitary gland and the presence of functional anterior pituitary tissue. The blood sugar increased and immunoreactive insulin levels remained low in all subjects during VP tests. It is concluded, that iv VP offers no reliable test for HGH release at least in male subjects. Stress is not the only determinant of HGH release during iv infusion of VP in females. In males and females VP cannot differentiate pituitary from hypothalamic causes of diminished HGH release. In some cases of pituitary tumours, pressure of the tumour on the median eminence of the hypothalamus may be the cause of the impaired HGH release in response to provocation tests.

Efect of intermittent feeding on blood plasma growth hormone and prolactin in chickens of a heavy breed

1983 ◽  
Vol 24 (1) ◽  
pp. 63-70 ◽  
Author(s):  
I. Nir ◽  
S. Harvey ◽  
Z. Nitsan ◽  
Y. Pinchasov ◽  
A. Chadwick
Keyword(s):  
Growth Hormone ◽  
Blood Plasma ◽  
Plasma Growth Hormone ◽  
Intermittent Feeding
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