Background: Athlete's heart as an adaptation to long-time and intensive endurance training can vary considerably between individuals. Genetic polymorphisms in the cardiological relevant insulin-like growth factor 1 (IGF1) signalling pathway seem to have an essential influence on the extent of physiological hypertrophy.
Objective: Analysis of polymorphisms in the genes of IGF1, IGF1 receptor (IGF1R) and the negative regulator of the cardiac IGF1 signalling pathway, myostatin (MSTN), and their relation to left ventricular mass (LVM) of endurance athletes.
Methods: In 110 elite endurance athletes or athletes with a high amount of endurance training (75 males and 35 females) and 27 male controls, which were examined by echocardiographic imaging methods and ergometric exercise-testing, the genotypes of a cytosine-adenine repeat polymorphism in the promoter region of the IGF1 gene and a G/A substitution at position 3174 in the IGF1R gene were determined. Additionally, a mutation screen of the MSTN gene was performed.
Results: The polymorphisms in the IGF1 and the IGF1R gene showed a significant relation to the LVM for male (IGF1: p=0.003; IGF1R: p=0.01), but not for female athletes. The same applies to a previously unnoticed polymorphism in the 1 intron of the MSTN gene, whose deletion allele (AAA→AA) appears to increase the myostatic effect (p=0.015). Moreover, combinations of the polymorphisms showed significant synergistic effects on the LVM of the male athletes.
Conclusions: The authors' results argue for the importance of polymorphisms in the IGF1 signalling pathway in combination with MSTN on the variant degree of physiological hypertrophy of male athletes.
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http://dx.doi.org/10.1136/bjsm.2008.050567 | DOI Listing |
Biomed Pharmacother
January 2025
Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Republic of Korea; Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Republic of Korea. Electronic address:
Obesity is a prevalent metabolic disorder linked to insulin resistance, hyperglycemia, increased adiposity, chronic inflammation, and cognitive dysfunction. Recent research has focused on developing therapeutic strategies to mitigate cognitive impairment associated with obesity. Insulin growth factor-1 (IGF1) deficiency is linked to insulin resistance, glucose intolerance, and the progression of obesity-related central nervous system (CNS) disorders.
View Article and Find Full Text PDFVet Parasitol
January 2025
Centro de Investigaciones Básicas y Aplicadas, Universidad Nacional del Noroeste de la Provincia de Buenos Aires, Junín, Buenos Aires 6000, Argentina; Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires, CITNOBA, UNNOBA - UNSAdA - CONICET, Monteagudo 2772, Pergamino, Buenos Aires 2700, Argentina. Electronic address:
Dairy heifers with gastrointestinal nematodes have reduced growth rates, and delayed age at puberty and milk production onset related to late mammary gland development. IGF1 and Notch signaling systems are important in this process, and an altered profile of serum IGF1 has been associated with the detrimental effect of the nematodes on parenchymal development. In this context, we aimed to study the molecular mechanisms involved in bovine mammary gland development around pre and postpuberty, focusing on proliferative and angiogenic processes that involve the Notch and IGF1 pathways.
View Article and Find Full Text PDFCancers (Basel)
January 2025
Department of Obstetrics and Gynaecology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur 56000, Malaysia.
Endometrial cancer (EC) is a common gynaecological malignancy associated with metabolic dysfunctions such as obesity, diabetes and insulin resistance, as well as hormonal imbalances, particularly involving oestrogen and progesterone. These factors disrupt normal cellular metabolism, heightening the risk of developing endometrioid EC (EEC), the most prevalent subtype of EC. The insulin-like growth factor-1 (IGF1) pathway, a key regulator of growth, metabolism, and organ function, is implicated in EC progression.
View Article and Find Full Text PDFDiagnostics (Basel)
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Orthopedic Surgery, Macquarie University Hospital, Sydney, NSW 2113, Australia.
: Giant cell tumor of bone (GCTB) is a locally aggressive tumor. It accounts for only 5% of all bony tumors. Early diagnosis, and follow-up for recurrence is often difficult due to a lack of biogenetic markers.
View Article and Find Full Text PDFAm J Physiol Regul Integr Comp Physiol
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Curtin University, Curtin Medical Research Institute (Bentley, WA, AUSTRALIA).
Physical activity improves myocardial structure, function and resilience via complex, incompletely defined mechanisms. We explored effects of 1-2 wks swim training on cardiac and systemic phenotype in young male C57Bl/6 mice. Two wks forced swimming (90 min twice daily) resulted in cardiac hypertrophy (22% increase in heart:body weight, P<0.
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