Search Results
Results 601 - 650 of 1067
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Dall R - - 2001
The aim of the present study was to examine the GH/insulin-like growth factor (IGF) axis, post exercise, with emphasis on IGF-binding protein (IGFBP)-3 proteolysis. Sixteen elite rowers (8 female/8 male) performed a stepwise submaximal rowing test followed by a 6- to 7-min-long maximal test. Blood samples were drawn at baseline, ...
Di Luigi L - - 2001
The purpose of this study was to delineate the role of GH on serum IGF-I, IGFBP-2 and -3 responses to exercise. Hormones were evaluated in six trained male subjects before (-30, -15, 0), during (+15) and after (+30, +45, + 60, +90 min) a thirty-minutes treadmill exercise (60% VO2max), both ...
Cearlock D M - - 2001
OBJECTIVE: The objective of this study was to determine the effects of sustained moderate exercise on cholesterol, cortisol, and growth hormone blood levels in women of three age groups. DESIGN: A four-week exercise program followed by one week of no exercise. The exercise program consisted of 20 minutes of moderate ...
Gürsel Y - - 2001
Twenty patients with fibromyalgia syndrome (FMS) and 20 matched healthy controls were subjected to an exercise stress test above their anaerobic threshold. Serum samples for the measurement of growth hormone (GH), insulin-like growth factor-1 (IGF-1), prolactin (PRL), adrenocorticotrophic hormone (ACTH) and cortisol were taken prior to and after the test ...
Wallace J D - - 2001
Circulating GH consists of multiple molecular isoforms, all derived from the one gene in nonpregnant humans. To assess the effect of a potent stimulus to pituitary secretion on GH isoforms, we studied 17 aerobically trained males (age, 26.9 +/- 1.5 yr) in a randomized, repeat measures study of rest vs. ...
Ottenweller J E - - 2001
Chronic fatigue syndrome (CFS) is a debilitating disease characterized by severe, unexplained fatigue and postexertional exacerbation of symptoms. We examined basal endocrine function in a group of CFS patients and a carefully matched group of sedentary controls. The subjects then completed a graded, maximal exercise test on a treadmill, and ...
Jordan C L - - 2001
Previous work has shown that exposure to exogenous testosterone during synapse elimination permanently stabilizes synapses that would normally be lost in the androgen-sensitive levator ani (LA) muscle, indicating that testosterone is a potent stabilizing factor for developing LA synapses. Terminal Schwann cells (TSCs), which cap the neuromuscular junction, have also ...
De Palo E F - - 2001
Branched chain amino acids (BCAA) stimulate protein synthesis, and growth hormone (GH) is a mediator in this process. A pre-exercise BCAA ingestion increases muscle BCAA uptake and use. Therefore after one month of chronic BCAA treatment (0.2 gkg(-1) of body weight), the effects of a pre-exercise oral supplementation of BCAA ...
Gulmans V - - 2001
BACKGROUND: Little is known about the metabolic effects of exercise training in children with cystic fibrosis. The hypothesis for the current study was that in patients with declining clinical status, exercise increases circulating insulin-like growth factors (IGFs) and improves protein kinetics. METHODS: This was a prospective intervention study in 10 ...
Dixson A - - 2001
The common marmoset is a small New World primate that lives in extended family groups. Female marmosets show rhythmic changes in proceptivity during their 28-Day ovarian cycle, but fluctuations in sexual receptivity are relatively subtle. Receptivity persists even after ovariectomy and adrenalectomy in the female marmoset. In the intact female, ...
Lemmey A - - 2001
OBJECTIVE: To determine if the altered insulin-like growth factor (IGF) status in rheumatoid arthritis (RA) is due to inflammation, altered body composition, or lack of exercise. METHODS: Subjects included 73 patients with RA, 54 patients with other rheumatic diseases, both inflammatory and noninflammatory, and 28 healthy, physically active controls. Serum ...
Vigas M - - 2000
OBJECTIVE: To study the role of physical fitness and hyperthermia in inducing growth hormone (GH) and prolactin (PRL) responses to exercise in physically fit and in non-trained healthy subjects. METHODS: Ten wrestlers preparing for international competition (mean age 19), and nine untrained healthy males (mean age 21), volunteered in the ...
Bigbee A J - - 2000
Plasma growth hormone (GH) measured by immunoassay [immunoassayable GH (IGH)] and by tibial bioassay [bioassayable GH (BGH)] increases in humans in response to exercise. In rats, however, IGH does not change in response to exercise. The objective of this study was to determine the BGH response to an acute exercise ...
Harada T - - 2000
The purpose of this study was to examine the role of muscarinic cholinergic and alpha2-adrenergic mechanisms in growth hormone (GH) secretion during exercise in humans. The GH responses induced during moderate-intensity exercise (using a cycle ergometer at 60% maximal oxygen uptake, VO2max, for 30 min) without treatment (control) and after ...
de Vries W R - - 2000
OBJECTIVE: Responses to stressful events are generally regarded as reactions of the organism to accommodate to or compensate for stress. This reaction is classically described as an activation of the sympathoadrenal system and the hypothalamic-pituitary-adrenocortical (HPA) axis. Activation of the release of growth hormone and prolactin in blood also occurs ...
Cappa M - - 2000
Physical exercise is an important physiological stimulus to growth hormone (GH) release in man. Many neurotransmitters are involved in GH regulation. We studied the effect of the cholinergic pathway on GH secretion induced by physical exercise. Particularly, we studied the effect of a cholinergic muscarinic agonist on GH-induced physical exercise, ...
Wideman L - - 2000
We investigated the ability of exercise, a multipathway, potent, physiological stimulus for GH release, to alter the synergistic interaction of L-arginine (A) and GH-related peptide (GHRP)-2 (G) observed at rest and the ability of gender to further modulate this putative interaction. Subjects (9 men and 9 early follicular phase women) ...
Hackney A C - - 2000
In animals, female sex steroid hormones (SS, estrogens-progesterone) influence the energy substrate that is metabolized. Human research on this issue is controversial. This study examined whether changes in circulating SS hormone levels affected the carbohydrate-lipid metabolism during submaximal prolonged (60 min) exercise. Young, physically active females were studied. Four were ...
ter Maaten J C - - 2000
During the last decade, growth hormone deficiency (GHD) in adults has been described as a clinical syndrome. Central features of this entity include increased fat mass, reduced muscle and bone mass, as well as impaired exercise capacity and quality of life. GH replacement therapy has been initiated on a wide ...
Andersen N B - - 2000
OBJECTIVE: A decline of skeletal muscle mass and strength is seen with aging and immobilization. Growth hormone (GH) has been shown to increase muscle mass. In the present study the effects of a combination of mild exercise and GH on skeletal musculature tetanic tension, dry defatted weight (DDW), volume, water, ...
Davis M E - - 2000
Divergent selection for serum insulin-like growth factor-I (IGF-I) concentration began at the Eastern Ohio Resource Development Center (EORDC) in 1989 using 100 spring-calving (50 high line and 50 low line) and 100 fall-calving (50 high line and 50 low line) purebred Angus cows. Following weaning, bull and heifer calves were ...
Mariappan P - - 2000
The structure, growth, differentiation and function of crustacean chelipeds are reviewed. In many decapod crustaceans growth of chelae is isometric with allometry level reaching unity till the puberty moult. Afterwards the same trend continues in females, while in males there is a marked spurt in the level of allometry accompanied ...
Eliakim A - - 2000
Anabolic effects of exercise are mediated, in part, by fibroblast growth factor-2 (FGF-2), insulin-like growth factor-I (IGF-I), and growth hormone (GH). To identify local vs. systemic modification of these mediators, 10 male subjects performed 10 min of unilateral wrist-flexion exercise. Blood was sampled from catheters placed in basilic veins of ...
Legakis I N - - 2000
Galanin, a neuropeptide, is found in the central nervous system and in a number of nonbrain areas including adrenal sympathetic medullar tissue and pancreas. Several studies involve galanin in the regulation of GH, which responds to stressful stimuli. This study refers to the investigation of the effect of a 20-min ...
Collomp K - - 2000
The present study examined whether oral short-term administration of salbutamol (Sal) modifies performance and selected hormonal and metabolic variables during submaximal exercise. Eight recreational male athletes completed two cycling trials at 80-85% peak O(2) consumption until exhaustion after either gelatin placebo (Pla) or oral Sal (12 mg/day for 3 wk) ...
Weltman A - - 2000
To test the hypothesis that heightened sympathetic outflow precedes and predicts the magnitude of the growth hormone (GH) response to acute exercise (Ex), we studied 10 men [age 26.1 +/- 1.7 (SE) yr] six times in randomly assigned order (control and 5 Ex intensities). During exercise, subjects exercised for 30 ...
Simons M - - 2000
Therapeutic angiogenesis is a rapidly evolving approach to the treatment of advanced coronary disease. The availability of growth factors such as basic fibroblast growth factor (bFGF or FGF2) has made possible the practical clinical application of this research. In this article, we summarise the basic biology of bFGF, a prototypical ...
Maas HCM - - 2000
PURPOSE AND METHODS: This study was designed to investigate the role of two effective releasers of growth hormone (GH): GHRH and GHRP-2 during exercise (EX). Eight healthy male subjects (ages: 22 +/- 1.2 (mean +/- SD) yr, BMI: 22.5 +/- 2.2 kg x m(-2)) were exposed to maximally stimulating dose ...
Knipper M - - 2000
Both a genetic or acquired neonatal thyroid hormone (TH) deficiency may result in a profound mental disability that is often accompanied by deafness. The existence of various TH-sensitive periods during inner ear development and general success of delayed, corrective TH treatment was investigated by treating pregnant and lactating rats with ...
Raastad T - - 2000
The hormonal responses of nine male, strength athletes to strength exercise were examined. The athletes performed one moderate- and one high-intensity strength exercise workout. In the high-intensity workout, the load was 100% of each subject's three-repetition maximum (3-RM) for squats and front squats, and 100% of each subject's six-repetition maximum ...
Manelli F - - 2000
Recent clinical studies have demonstrated an increase of urinary albumin excretion (UAE) at rest in acromegalic patients and, on the other hand, a reduced UAE in patients with growth hormone (GH) deficiency. Physical exercise is known to induce abnormal UAE in patients with diabetes, probably unmasking early glomerular alterations. The ...
Sheehy A - - 2000
Based on the data of the First Zurich Longitudinal Growth Study we investigate how interindividual differences in adult size arise in the variables leg height, sitting height and standing height, arm length, bi-iliac width and bihumeral width. Specifically, we are also interested in the question of whether across sexes and ...
Mazzeo R S - - 2000
There is a known decline in immune function associated with aging which increases the risk for infectious diseases, tumorigenesis, and autoimmune disorders. As a result, older individuals demonstrating age-related immune dysfunction have significantly higher mortality rates. Alterations in neuroendocrine function play an important role in this immunosenescence as reductions in ...
Nindl B C - - 2000
Immunoassays for growth hormone (GH) may yield variable concentrations for the same sample due to the molecular heterogeneity of growth hormone and epitope specificity of their antibodies. Strasburger et al. developed an "immunofunctional" assay that only detects those GH molecules possessing intact sites 1 and 2, which are necessary for ...
Bosco C - - 2000
The aim of this study was to evaluate the acute responses of blood hormone concentrations and neuromuscular performance following whole-body vibration (WBV) treatment. Fourteen male subjects [mean (SD) age 25 (4.6) years] were exposed to vertical sinusoidal WBV, 10 times for 60 s, with 60 s rest between the vibration ...
Suzuki K - - 2000
To investigate the mechanisms of exercise-induced immune perturbations, we measured promising immunomodulatory hormones and cytokines in plasma of 16 male marathon runners before and after a competitive 42.195-km race. Interleukin 1-beta (IL-1beta) and interferon gamma (IFN-gamma) concentrations remained unchanged after the marathon. The cytokines IL-12, IFN-alpha and tumour necrosis factor ...
Dejean L - - 2000
The purpose of this study was to investigate the long-term control of ATP synthesis during the course of Saccharomyces cerevisiae batch grown on lactate, a purely respiratory substrate. For this, we used a respirometric and on-line calorimetric approach to analyse the energetic balances and the control of energetic metabolism during ...
Ballantyne C S - - 2000
We examined the effects of androstenedione supplementation on the hormonal profile of 10 males and its interaction with resistance exercise. Baseline testosterone, luteinizing hormone, estradiol, and androstenedione concentrations were established by venous sampling at 3 hr intervals over 24 hr. Subjects ingested 200 mg of androstenedione daily for 2 days, ...
Wallace J D - - 2000
To examine the interactions between acute exercise and GH on markers of bone and collagen turnover and to assess the potential for detecting GH abuse in athletes using these markers, we studied 17 aerobically trained males (age, 26.9+/-1.5 yr). Sequential studies of exercise, GH administration, and GH withdrawal were undertaken. ...
Whitley E - - 2000
The effect of modified atmosphere Packaging (MAP) on the growth of Listeria monocytogenes in mould ripened cheeses was studied at refrigeration temperatures (2-8.3 degrees C) over a storage period of 6 weeks. Control experiments in cling film with no atmospheric modification produced a lag time before growth of up to ...
Nielsen M E - - 2000
Rainbow trout (Oncorhynchus mykiss) were subjected to vigorous exercise (1.5 body length s-1), low exercise (0.5 body length s-1) or still-water (0.0 body length s-1). Hematocrit, glucose, growth hormone (GH), cortisol and triiodo-L-thyronine (T3) were monitored at the start of exercise, after 24 h, and after 2, 4, 8, 16 ...
Ryszka F - - 2000
The aim of this study was to observe the specificity of prolactin and tyroliberin uptake and thus to determine their affinity for the heart ventricles and atria. Comparison of the uptake of the examined substances revealed that more of these hormones reached the atria than the ventricles. The contents of ...
Cifuentes A - - 2000
Experimental conditions for the fabrication of two new polymeric devices (i.e. films and slabs) useful for the controlled release of recombinant growth hormone (GH) are given. The release rate is controlled by the resorption profile of the vinylpyrrolidone-hydroxyethyl methacrylate (VP-HEMA) tested systems which is related to the copolymer composition. The ...
Lamberts S W - - 2000
There is much evidence that some aspects of ageing are similar to those observed in selective hormone deficiencies during adulthood. Replacement therapy in hypogonadism and/or growth hormone (GH) deficiency in adulthood is very successful in reversing the related clinical symptomatology. However, preliminary studies of GH treatment in the normal elderly ...
Ghizzoni L - - 2000
The growth and pubertal development of patients with premature adrenarche are reported to be normal, but the effects of this condition on pubertal growth are not well documented. In the present study the growth kinetics of a group of 38 female patients with isolated premature adrenarche followed in our institution ...
Takarada Y - - 2000
Hormonal and inflammatory responses to low-intensity resistance exercise with vascular occlusion were studied. Subjects (n = 6) performed bilateral leg extension exercise in the seated position, with the proximal end of their thigh compressed at 214 +/- 7.7 (SE) mmHg throughout the session of exercise by means of a pressure ...
Koziris L P - - 2000
This investigation was conducted to determine the effect of postexercise ethanol intoxication (21.97 +/- 1.09 mmol/l blood) on the response of selected aspects of the neuroendocrine system to a resistance exercise (Ex) session. Nine resistance-trained men (25.0 +/- 1.4 yr, 179.4 +/- 3.4 cm, 79.7 +/- 3.3 kg) were used ...
Hurel S J - - 1999
OBJECTIVE: The normal decline in physiological function with ageing is associated with a decrease in bioavailable growth hormone. Growth hormone has been shown to alter body composition and increase fat-free mass in older men. Increased physical fitness is accompanied by an increase in 24-h growth hormone release. The purpose of ...
Manelli F - - 1999
In our study we assessed the effects of a single i.m. injection of slow-release Lanreotide (30 mg) (SR-L), a new long-acting somatostain analog, on circulating GH levels, baseline cardiac function (M-mode, 2D guided, doppler-echocardiographic study) and cardiopulmonary response to exercise (cycloergometric test, performed using a computer drived, electrically braked cycle ...
Wallace J D - - 1999
GH abuse by elite athletes is currently undetectable. To define suitable markers of GH doping, we assessed the effects of acute exercise, GH administration, and GH withdrawal on the GH/insulin-like growth factor (IGF) axis in athletic adult males. Acute endurance-type exercise increased serum GH, GH-binding protein (GHBP), total IGF-I, IGF-binding ...
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