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Preterm premature rupture of membranes (pPROM) is a common pregnancy disease closely related to inflammation. The formyl peptide receptor 2 (FPR2), a member of the G protein-coupled receptor family involved in defense responses, inflammation, and disturbances in glucose and lipid metabolism, is associated with pregnancy diseases. Lipoxin A4 (LXA4) can activate FPR2 and inhibit the inflammatory signals. Exosomes derived from mesenchymal stem cells are good materials for anti-inflammatory and tissue repair. This study aims to investigate the anti-inflammatory and tissue repair effects of the combined application of exosomes derived from human umbilical cord mesenchymal stem cells and FPR2 agonist LXA4. In this study, LPS was used to establish the inflammation model of pregnant mice and HTR8 cells, and LXA4 and exosome treatment were carried out to observe the fetal membranes' tissue repair. The scanning and transmission electron microscopy of fetal membrane tissue indicated that the structure of pPROM tissue was disordered, and the cell gap was significantly increased. The results of the inflammatory mice model suggested that LPS can cause damage to the fetal membrane structure. LXA4 combined with exosome treatment can inhibit the production of MMP2 and MMP9, and promote neovascularization by inhibiting the p38 MAPK/Nuclear factor kB p65 (NFkB) pathway in the inflammation model of HTR8 cells and pregnant mice, thus helping to control inflammation and tissue repair. [ABSTRACT FROM AUTHOR]

Intrahepatic cholestasis of pregnancy (ICP) can lead to many adverse pregnancy outcomes, and the influencing factors remain unclear at present. This study retrospectively analyzed clinical data from 1815 pregnant women with ICP and evaluated the relationship between ICP subtypes, gestational age at onset, and pregnancy outcomes. The results of this study show that during pregnancy, the levels of biochemical indicators (TBA, DBIL and ALT) in the serum of pregnant women initially diagnosed with subtypes of ICP were noted to constantly change, and the subtype of ICP and its severity also changed. The incidence of adverse pregnancy outcomes [meconium-stained amniotic fluid (MSAF), NICU transfer, Apgar score ≤ 7 at 1 min, and preterm birth] in patients with ICP1 (icteric type) was significantly higher than for patients with ICP2, ICP3 or ICP4. The preterm birth rate of early-onset ICP was higher than that of late-onset ICP in ICP1 and ICP3 subtypes. In conclusion, the outcome of pregnancy in women with ICP is closely related to the serum TBA level and ICP subtype, which should be recognized in the clinic. [ABSTRACT FROM AUTHOR]