Abstract:
BACKGROUND:The intensive physical activity is often associated with cardiac changes. OBJECTIVES:(i) To evaluate the IGF-I system and myocardial structure and function by standard Doppler echocardiography and Tissue Doppler in athletes and sedentary controls; and (ii) to determine any relationship between IGF-I system and echocardiographic parameters. METHODS:Nineteen male top-level rowers and 19 age-matched healthy sedentary male controls underwent blood determination of fasting serum IGF-I, IGFBP-3 and acid-labile subunit levels and standard Doppler echocardiography combined with pulsed Tissue Doppler of posterior septal wall, left ventricular (LV) lateral mitral annulus and right ventricular (RV) tricuspid annulus. Myocardial presystolic (PS(m)), systolic (S(m)), the ratio of early diastolic (E(m)) to atrial (A(m)) velocities as well as myocardial time intervals were calculated. RESULTS:Rowers had higher serum IGF-I levels (P = 0.04), higher biventricular cavity dimensions and wall thicknesses compared to controls. They also had better LV and RV myocardial function than controls. In the rowers, IGF-I was associated with LV ejection fraction (r = 0.50, P = 0.03), RV PS(m) velocity (r = 0.55, P = 0.01) and with RV myocardial precontraction time (r = -0.57, P = 0.01). These associations remained significant after adjusting for age and heart rate. CONCLUSIONS:Top-level athletes showed higher IGF-I levels and a better myocardial performance than controls, particularly for the RV systolic activity. The independent correlations between IGF-I and systolic parameters of the left (ejection fraction) and right (PS(m) velocity and precontraction time) ventricles may possibly indicate a role of IGF-I system in the modulation of myocardial inotropism in athletes. Further studies are needed to confirm this hypothesis.
journal_name
Clin Endocrinol (Oxf)journal_title
Clinical endocrinologyauthors
Vitale G,Galderisi M,Colao A,Innelli P,Guerra G,Guerra E,Dini FL,Orio F Jr,Soscia A,De Divitiis O,Lombardi Gdoi
10.1111/j.1365-2265.2008.03177.xsubject
Has Abstractpub_date
2008-08-01 00:00:00pages
231-6issue
2eissn
0300-0664issn
1365-2265pii
CEN3177journal_volume
69pub_type
杂志文章abstract::Insulin-like growth factor-II (IGF-II) is a widely expressed 7·5 kDa mitogenic peptide hormone. Although it is abundant in serum, understanding of its physiological role is limited compared with that of IGF-I. IGF-II regulates foetal development and differentiation, but its role in adults is less well understood. Evid...
journal_title:Clinical endocrinology
pub_type: 杂志文章,评审
doi:10.1111/cen.12446
更新日期:2014-06-01 00:00:00
abstract::The association of invasive fibrous thyroiditis (IFT) with foci of extracervical fibrosclerosis is well recognized. Affected sites include the retroperitoneum, the mediastinum, the biliary tract, and the orbit. The development of subcutaneous fibrosclerosis, however, is extremely rare. We report a patient with known i...
journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1046/j.1365-2265.1997.1941028.x
更新日期:1997-07-01 00:00:00
abstract:OBJECTIVE:Cranial irradiation frequently results in growth hormone (GH) deficiency. Patients with radiation-induced GH deficiency usually remain responsive to exogenous growth hormone releasing hormone, implying radiation damages the hypothalamus rather than the pituitary. Little is known about the effect of cranial ir...
journal_title:Clinical endocrinology
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doi:10.1111/j.1365-2265.1994.tb02525.x
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abstract::Infertility with azoospermia requires a diligent search for reversible factors and treatment to restore natural fertility, even though most cases are due to untreatable primary spermatogenic failure and are destined to require consideration of assisted reproductive treatment (ART) options. Complete clinical and diagno...
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abstract:OBJECTIVE:The aim of this study was to assess the volumetric bone mineral density (BMD) in girls with Turner's syndrome (TS) before and during growth hormone (GH) treatment in combination with low dose oestrogens as well as three years after discontinuation of GH treatment. DESIGN:In a prospective, randomized injectio...
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-05-01 00:00:00
abstract:OBJECTIVES:A population-based study was undertaken to determine the mortality and morbidity for people with hypoparathyroidism compared to the general population. METHODS:In this study, patients identified with chronic hypoparathyroidism using data linkage from regional datasets were compared with five age- and gender...
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journal_title:Clinical endocrinology
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doi:10.1111/j.1365-2265.1981.tb00196.x
更新日期:1981-03-01 00:00:00
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journal_title:Clinical endocrinology
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journal_title:Clinical endocrinology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2265.1989.tb00266.x
更新日期:1989-06-01 00:00:00
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更新日期:1993-09-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1981.tb00650.x
更新日期:1981-08-01 00:00:00
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更新日期:1976-01-01 00:00:00
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更新日期:1996-07-01 00:00:00
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更新日期:2003-02-01 00:00:00
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doi:10.1111/j.1365-2265.1978.tb03579.x
更新日期:1978-11-01 00:00:00