Biological rhythms and pulsatile hormone secretion 7, 8, 11
Fasting enhances growth hormone secretion and amplifies the complex rhythms of growth hormone secretion in man
... growth hormone (GH) is infrequent and erratic, and unlike that in the rat does not appear to have discernible ultradian ...24-h pulsatile pattern of GH secretion obtained from repetitive venous ...
9
Estradiol modulates the pulsatile secretion of biologically active luteinizing hormone in man
... radioimmunoassay and the rat interstitial cell testosterone bioassay, respectively. Estradiol infusions significantly suppressed mean plasma bioactive LH concentrations and decreased the bio/immuno LH ratio. Conversely, ...
9
Endogenous opiates modulate the pulsatile secretion of biologically active luteinizing hormone in man
... bioactive:immunoactive LH ratios within both spontaneous and naltrexone-stimulated LH pulses were higher than corresponding interpulse ratios (P less than 0.001). Quantitative characterization of the pulsatile ...
11
Does cortisol mediate endotoxin-induced inhibition of pulsatile luteinizing hormone and gonadotropin-releasing hormone secretion?
... the 11-  hydroxylase enzyme that catalyzes con- version of 11-desoxycortisol to ...enhanced secretion of cortisol is not needed for endotoxin to suppress either hypothalamic GnRH secretion or ...
11
Enhanced basal and disorderly growth hormone secretion distinguish acromegalic from normal pulsatile growth hormone release
... GH secretion was present in virtually all active acromegalics but not those in remission or in fed and fasted normal ...GH secretion (fed, P < 10(-12); fasted, P < 10(-7)) with high sensitivity (95%) ...
13
Pulsatile growth hormone secretion in normal man during a continuous 24 hour infusion of human growth hormone releasing factor (1 40) Evidence for intermittent somatostatin secretion
... Growth hormone (GH) secretory patterns were studied in a patient with ectopic growth hormone releasing factor (GRF) secretion and in normal men given continuous infusions of human growth[r] ...
8
Negative feedback regulation of pulsatile growth hormone secretion by insulin like growth factor I Involvement of hypothalamic somatostatin
... GH-releasing hormone by 82 +/- 3%, and thyroid-stimulating hormone responses to thyrotropin-releasing hormone were also suppressed by 44 +/- ...
9
Role of endogenous opiates in the expression of negative feedback actions of androgen and estrogen on pulsatile properties of luteinizing hormone secretion in man
... on pulsatile properties of luteinizing (LH) hormone release in normal ...the pulsatile LH signal. The properties of pulsatile LH secretion were ...
10
A low dose euglycemic infusion of recombinant human insulin like growth factor I rapidly suppresses fasting enhanced pulsatile growth hormone secretion in humans
... micrograms.kg-1.h-1 during a euglycemic clamp in 10 normal men who were fasted for 32 h to enhance GH secretion. Saline alone was infused during an otherwise identical second admission as a control. As a result of ...
11
Regulatory mechanisms of growth hormone secretion are sexually dimorphic
... of pulsatile GH secretion for the six men and seven women who received rhIGF-I are given in Table ...suppressed pulsatile GH secretion and both total 24-h IGHC and pulse frequency were ...
13
Hypothalamic growth hormone secretagogue receptor regulates growth hormone secretion, feeding, and adiposity
... study, pulsatile GH secretion was preserved in male Tg rats, while GH secretion and plasma IGF-I lev- els were reduced in female Tg ...GH secretion with extremely low basal secretion ...
9
From biological clock to biological rhythms
... Circadian rhythms are fluctuations in physiological and behavioral activities that occur over a period of about 24 ...these rhythms parallel environmental cycles of light and dark, they are not simply a ...
5
Entrainment of pulsatile insulin secretion by oscillatory glucose infusion
... insulin secretion with periods around 120 min occur in ...insulin secretion that entrain glucose ...insulin secretion could be modified by oscillatory glucose infusion, seven normal men were studied ...
8
Growth hormone secretion during sleep
... FIGURE 6 The plasma growth hormone, glucose, insulin, and cortisol levels during 12 normal control sleep studies. All val-[r] ...
13
Influences of Biological Rhythms on the Effects of Psychotropic Drugs
... The rhythms in drug effects are suggested not to be due to rhythmic changes in the pharmacokinetics of the drugs but rather to an endogenous rhythm in drug susceptibility resulting from a circadian rhythm in the ...
12
The influence of biological rhythms on host–parasite interactions
... 1: Rhythms and Temporal ...environmental rhythms, host life history, host immunity rhythms, and parasite ...geophysical rhythms, diel and annual cycles. (B) Biological and environmental ...
25
Guidelines for Genome-Scale Analysis of Biological Rhythms
... of Biological Sciences at Rensselaer Polytechnic ...and Biological Science Research Council grant BB/L023067/1 and EU Marie Sklodowska Curie Career Integration grant ...
15
7442_MACI_CH07_pp qxp 8/11/10 7:11 AM Page 170 Deviance 7
... in Everyday Life white-collar crime crime committed by people of high social position in the.. course of their occupations.[r] ...
32
Neuroendocrine regulation of the corpus luteum in the human Evidence for pulsatile progesterone secretion
... The pattern of episodic gonadotropin release was studied in 15 normal female volunteers during the luteal phase of the menstrual cycle with 24 h of blood sampling for follicle- stimulati[r] ...
11
Effect of lipids on growth hormone secretion in humans
... growth hormone secretion in humans, paired insulin hypoglycemia tests and paired arginine infusion tests were performed on eight and six normal female volunteers ...growth hormone stimulus, subjects ...
6