Abstract
Background: Gold-induced autologous cytokine (GOLDIC) treatment is usually used in the therapy of the inflammatory musculoskeletal disorders (e.g. osteoarthritis in humans) and is able to modulate the inflammatory reaction. Moreover, governed by chemokines and cytokines, the complex inflammatory response after an acute myocardial infarction (MI), the main cause of death worldwide, plays an important role in the preservation of heart function. Therefore, we hypothesized that GOLDIC could also have an important role in ventricular remodeling after MI. Methods: Myocardial infarction was induced in mice and GOLDIC-enriched serum was directly injected directly in the infarcted tissue. Four weeks later, the function of the heart, as well as the infarction size and the scar composition were analyzed. Statistical analysis was performed with Prism 6.1 software (GraphPad), using 1-way ANOVA, followed by Newman-Keuls post-hoc-test, as indicated. Data are represented as mean ± SEM. Results: Four weeks after MI, GOLDIC-treated mice show significantly decreased heart function and higher infarction size compared to the control group. Immunohistochemistry reveals a significantly increased number of myofibroblasts, correlating with higher collagen content in the infarcted area. Despite impaired heart function, angiogenesis in the GOLDIC-treated group is improved compared with the control, due to the increased vascular endothelial growth factor (VEGF) in the GOLDIC serum. Conclusions: In conclusion, GOLDIC treatment impairs the ventricular remodeling, worsening the heart function. Therefore, these systemic effects should be taken into account when new therapies are designed for the musculoskeletal disorders.
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