MicroRNAs in Takotsubo Syndrome: A Systematic Review of Regulatory Networks in Stress-Induced Cardiomyopathy.

MicroRNAs (miRNAs) have emerged as crucial regulators of gene expression and have been implicated in various physiological and pathological processes, including cardiovascular diseases. The clinical presentation, diagnostic criteria, and proposed pathophysiological mechanisms of Takotsubo Syndrome (TTS) are discussed, with an emphasis on the emerging evidence implicating miRNAs in its etiology and progression. A systematic review following the PRISMA guidelines was performed on the evidence regarding the interplay between miRNAs and TTS. A search of the Pubmed, Web of Science, and Scopus databases was conducted and resulted in 584 articles. Of these, 14 full-text articles were eligible for inclusion in the qualitative analysis. The reviewed studies suggest that multiple miRNAs are involved in the processes associated with TTS pathophysiology, including acute and chronic myocardial inflammation, oxidative stress, apoptosis, microvascular dysfunction, hypertrophy, and, ultimately, maladaptive cardiac remodelling. This review provides an overview of the current understanding of miRNAs in cardiovascular pathophysiology, with a specific focus on their potential roles in TTS. To the best of our knowledge, this is the first systematic exploration of the miRNAs involved in TTS and its modulation as potential biomarkers or therapeutic targets.