Background: The renin-angiotensin-aldosterone system is known to play an important role in the pathophysiology and development of heart failure. Several studies have reported the benefits of testosterone in heart failure. However, the mechanisms of testosterone-induced effects on heart failure require further study.

Aims: To determine the effects of castration and testosterone administration on cardiac function and angiotensin II receptor function in rats with isoproterenol-induced heart failure.

Methods: Wistar rats were divided randomly into control and heart failure groups. The heart failure groups were further divided into the following groups: castration; castration+testosterone replacement; and sham castration. Echocardiography and haemodynamic measurements were used to evaluate cardiac function. Cardiocyte apoptosis and fibrosis were determined using terminal deoxyribonucleotide transferase-mediated dUTP nick-end labelling (TUNEL) staining and Masson's Trichrome staining, respectively. Angiotensin II receptor (AT1 and AT2) messenger ribonucleic acid (mRNA) expression levels were assayed using real-time reverse transcriptase-polymerase chain reactions, while Western immunoblotting was used to estimate Bcl-2 protein expression levels.

Results: Castration significantly increased cardiomyocyte apoptosis and fibrosis that was normally induced by isoproterenol (P<0.05). AT2 receptor mRNA expression in the castration group was increased and Bcl-2 protein expression was decreased compared with the castration+testosterone replacement group (P<0.05).

Conclusion: These data suggest that androgen therapy could play an important role in pathophysiological changes in heart failure and have beneficial effects for its treatment.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acvd.2011.12.002DOI Listing

Publication Analysis

Top Keywords

heart failure
24
cardiac function
12
isoproterenol-induced heart
8
angiotensin receptor
8
failure groups
8
apoptosis fibrosis
8
heart
7
failure
6
testosterone improves
4
improves cardiac
4

Similar Publications

Objective: The objective was to evaluate the etiology, natural history, and impact of surgical intervention on outcomes of left ventricular assist device (LVAD) patients presenting with intracranial hemorrhage (ICH).

Methods: The authors completed a retrospective review of LVAD patients who presented with ICH at 2 centers between 2013 and 2022. Patients were reviewed for demographic, clinical, and radiographic variables.

View Article and Find Full Text PDF

Commemorating the 1924 Nobel Prize Awarded to Willem Einthoven: A Century of Progress in Electrocardiography and Arrhythmia Research.

Europace

December 2024

Translational Cardiology, Department of Cardiology and Department of Physiology, Inselspital University Hospital Bern, University of Bern, 3012 Bern, Switzerland.

View Article and Find Full Text PDF

Background: Dyspnoea is one of the emergency department's (ED) most common and deadly chief complaints, but frequently misdiagnosed and mistreated. We aimed to design a diagnostic decision support which classifies dyspnoeic ED visits into acute heart failure (AHF), exacerbation of chronic obstructive pulmonary disease (eCOPD), pneumonia and "other diagnoses" by using deep learning and complete, unselected data from an entire regional health care system.

Methods: In this cross-sectional study, we included all dyspnoeic ED visits of patients ≥ 18 years of age at the two EDs in the region of Halland, Sweden, 07/01/2017-12/31/2019.

View Article and Find Full Text PDF

Introduction: Medication regimen complexity may be an important risk factor for adverse outcomes in older adults with heart failure. However, increasing complexity is often necessary when prescribing guideline-directed medical therapy at the time of a heart failure hospitalization. We sought to determine whether increased medication regimen complexity following a heart failure hospitalization was associated with worse post-hospitalization outcomes.

View Article and Find Full Text PDF

This post-marketing surveillance (PMS) assessed the safety and effectiveness of isatuximab plus pomalidomide and dexamethasone (Isa-Pd) for relapsed or refractory multiple myeloma (RRMM) in frail individuals during real-world use in Japan. Data from all individuals with RRMM treated with Isa-Pd in Japan between October 2020 and October 2021 were collected, with follow-up continued up to 12 months after starting Isa-Pd or until discontinuation. In the overall PMS population, 40 participants were classified as frail (33.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!