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Uterine Fibroids Review: Understanding their Origins to Better Understand their Future Treatments

Carlos Pascual Botía, Sara Cholvi Camarasa, Francisco Raga Baixauli and Antonio Cano Sanchez

Despite the high prevalence and the enormous impact the uterine fibroids has on the healthcare system and the economy, there is no effective medical treatment available to eliminate fibroids. This is due in part to the fact that very little is known about their pathophysiology; in order to look for and potentially find treatments capable of eliminating fibroids, we must gain a deep understanding of the mechanisms behind their initiation, stimulation, and growth. In this article, we comprehensively review current knowledge of the pathogenesis of uterine fibroids, with the aim of better understanding their origin, as well as discussing the action of already existing medical treatments in order to highlight ways that potential future therapies may be able to target the disease. A literature search was performed in PubMed to find articles related to the etiopathogenesis of fibroids and their treatments. Myomas comprise areas of disordered smooth muscle fascicles characterized by an excess of acellular extracellular matrix (ECM) with a dysregulated phenotype. Although the initial event is believed to be smooth muscle cell proliferation, it is thought that a complex signaling system is also necessary. Non-hormonal factors may be responsible for initiating the development of uterine fibroids, although hormonal stimulation is an essential factor for their growth Recent studies have confirmed that the different cell types contained in fibroids are all clonally derived from a parental cell with implied multipotent stem cell properties. Ethnicity also strongly influences the development and clinical severity of fibroids. Many Growth factors and their respective receptors have been implicated in fibroid growth. The available evidence continues to reinforce the importance of progesterone in the development of fibroids. The Ulipristal Acetate mediated volume reduction is due to a series of multifactorial and successive events that lead to a low proliferation rate.