J T Cummins
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Explore the profile of J T Cummins including associated specialties, affiliations and a list of published articles.
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98
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527
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Recent Articles
1.
Thomas G, Scott C, Cummins J, Clarke I
Domest Anim Endocrinol
. 1994 Apr;
11(2):187-95.
PMID: 8045100
This study examined the role of the adrenergic system in the regulation of growth hormone (GH) secretion in sheep. Intravenous infusion of noradrenaline (0.5 microgram/kg per min for 2 hr)...
2.
Cavallo A, Murphy M, McKelvie P, Cummins J
Aust N Z J Surg
. 1993 Jun;
63(6):490-3.
PMID: 8498921
A case of a 26 year old woman with increasing headaches due to a suprasellar cyst is described. Histology was consistent with an epithelial cyst with features resembling both Rathke's...
3.
Chen C, Zhang J, McNeill P, Pullar M, Cummins J, Clarke I
Brain Res
. 1993 Feb;
604(1-2):345-8.
PMID: 8384513
Electrophysiology of human growth hormone secreting tumour cells and its modification by hGRF has been studied using on-cell and Nystatin-perforated whole-cell recording configurations. Local application of hGRF (10 nM) produced...
4.
Tilbrook A, de Kretser D, Cummins J, Clarke I
Endocrinology
. 1991 Dec;
129(6):3080-92.
PMID: 1954890
This study aimed to delineate the hypothalamic and/or pituitary actions of testosterone and its primary metabolites 5 alpha-dihydrotestosterone and estradiol (E) in adult castrated rams (wethers) during the breeding season....
5.
Robertson D, Foulds L, Fry R, Cummins J, Clarke I
Endocrinology
. 1991 Oct;
129(4):1805-13.
PMID: 1915069
Previous studies have shown that the circulating half-life (t 1/2) of serum FSH in ewes after hypophysectomy (HPX) increased 10-fold after ovariectomy (OVEX). The basis for this difference was examined...
6.
Thomas G, Cummins J, Francis H, Sudbury A, McCloud P, Clarke I
Endocrinology
. 1991 Feb;
128(2):1151-8.
PMID: 1671214
These studies characterized the secretion of GH-releasing factor (GRF) and somatostatin (SRIF) into the hypophysial portal circulation in ewes after long term restricted feeding. In addition, we examined the temporal...
7.
Horton R, Li J, Cummins J, Smith A, Shen P, Clarke I
Neuroendocrinology
. 1990 Dec;
52(6):612-7.
PMID: 2126611
To determine whether opiates directly modulate pituitary LH secretion in vivo, morphine was administered to hypothalamo-pituitary-disconnected (HPD) ewes which were receiving exogenous pulses of GnRH. To define the steroidal background...
8.
Phillips D, Cummins J, Clarke I
J Endocrinol
. 1990 Nov;
127(2):223-33.
PMID: 2250148
The patterns of gonadotrophin-releasing hormone (GnRH) input to the pituitary gland that affect the expression of a positive-feedback event by oestrogen on LH secretion were investigated in ovariectomized ewes with...
9.
Clarke I, Foulds L, Hayward S, Cummins J, Robertson D
J Endocrinol
. 1990 Nov;
127(2):217-22.
PMID: 2250147
Plasma concentrations of in-vitro biological and immunological LH were measured throughout the LH surge in cyclic ewes and in ovariectomized ewes treated i.m. with oestradiol benzoate. Both activities increased in...
10.
Thomas G, Mercer J, Karalis T, Rao A, Cummins J, Clarke I
Endocrinology
. 1990 Mar;
126(3):1361-7.
PMID: 2307109
The effects of long term restricted feeding on the synthesis, storage, and release of GH, LH, FSH, and PRL were examined in adult ovariectomized ewes. Two groups of six ewes...