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Placental Growth Factor Secreted from Placenta-Derived Mesenchymal Stem Cells Improves Ovarian Function in TAA-Injured Rats via Antioxidant Effects
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Placental Growth Factor Secreted from Placenta-Derived Mesenchymal Stem Cells Improves Ovarian Function in TAA-Injured Rats via Antioxidant Effects
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Journal Article
Placental Growth Factor Secreted from Placenta-Derived Mesenchymal Stem Cells Improves Ovarian Function in TAA-Injured Rats via Antioxidant Effects
2026
Overview
Ovarian dysfunction resulting from metabolic or toxic injury is characterized by follicular depletion, stromal remodeling, oxidative stress, and endocrine dysregulation. Placenta-derived mesenchymal stem cells (PD-MSCs) have been proposed as a potential therapeutic approach due to their paracrine factors, including placental growth factor (PlGF). However, the pathways through which PD-MSCs exert protective effects on the ovary remain insufficiently defined. In this study, we examined whether PD-MSC transplantation ameliorates ovarian injury in a thioacetamide (TAA)-induced ovarian insufficiency model and explored the signaling events potentially associated with this response. Female rats were administered TAA for 12 weeks, and PD-MSCs were transplanted at week 8. We assessed ovarian morphology, fibrosis, oxidative stress markers, hormonal profiles, and follicle development. Complementary in vitro experiments using TAA-treated KGN granulosa-like cells were performed to investigate potential mechanistic associations. PD-MSC transplantation improved ovarian architecture, reduced collagen deposition, enhanced follicle growth, and mitigated oxidative stress. These changes were accompanied by increased PlGF expression and enhanced activation of fms-like tyrosine kinase-1 (Flt-1), p38 mitogen-activated protein kinase (p38 MAPK), extracellular signal-regulated kinase (ERK), and nuclear factor erythroid 2-related factor 2 (Nrf2)-related antioxidant pathways. In vitro, PD-MSCs coculture similarly attenuated oxidative stress and partially improved mitochondrial membrane potential in damaged KGN cells. Together, these findings suggest that PD-MSCs ameliorate ovarian structural damage and oxidative stress in TAA-induced injury, potentially through paracrine mechanisms partly involving PlGF/Flt-1-associated antioxidant signaling. This work supports the therapeutic potential of PD-MSCs for metabolic or toxicant-induced ovarian insufficiency while underscoring the need for further studies to fully delineate the specific contribution of PlGF and its interaction with downstream antioxidant pathways.
Publisher
MDPI AG,Multidisciplinary Digital Publishing Institute (MDPI)
Subject
