The actions of resveratrol in decidualizing endometrium: Acceleration or inhibition?†
2020
Resveratrol, a natural polyphenolic compound, is widely studied for its anti-inflammatory and antisenescent properties. Recently, two studies reported seemingly conflicting findings on the actions of resveratrol on decidualization of human endometrial stromal cells (HESCs). One study by Ochiai et al. demonstrated that resveratrol inhibits decidual transformation of primary cultured HESCs. The other study by Mestre Citrinovitz et al., showed that resveratrol enhances decidualization of HESCs in culture. At a glance, the reason for these opposing observations seems puzzling. However, recent studies demonstrated that decidualization is a multistep process, which starts with an acute proinflammatory stress response that lasts for several days and is followed by the emergence of stress-resistant decidual cells as well as senescent decidual cells. The balance between these decidual subpopulations may determine if the cycling endometrium can successfully transition into the decidua of pregnancy upon embryo implantation. Here, we explore the importance of timing of drugs aimed at modulating the decidual response. We posit that resveratrol treatment during the initial proinflammatory decidual phase, i.e., coinciding with the implantation window in vivo, inhibits decidual transformation of the endometrium. However, when given after the initial phase, resveratrol may promote decidualization by inhibiting decidual senescence. Further, if restricted to the proliferative phase, resveratrol may promote ovarian function without adversely impacting on embryo implantation or decidualization. Thus, failure to align drug interventions with the correct phase of the menstrual cycle may negate beneficial clinical effects and results in adverse reproductive outcomes.
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