Extracellular vesicles as mediators of the gut–ovary axis in reproductive aging treating

Ovarian aging is a major driver of female reproductive decline, with systemic metabolic and endocrine shifts closely intersecting with host longevity. 1During the past decades, growing evidence has demonstrated that the gut microbiota is actively involved in modulating host physiological homeostasis and reproductive endocrinology. 2 However, the precise mechanisms governing this distant, cross-organ communication remain poorly understood.Recently, a paper published in Advanced Science revealed this mechanism by exploring the potential of Bacteroides fragilis (BF) transplantation in ameliorating reproductive aging. 3The authors demonstrated that BF exerts anti-aging effects on the ovary by inducing the release of extracellular vesicles (EVs) from intestinal cells (BF-EVs), which delivering protective signals through the newly identified gut-ovary axis.This work provides instructive insights into microbiota-host communication, 3 and in this comment, we will discuss its key strengths, limitations, and broader implications to objectively assess its scientific value and application prospects.