Downregulation of NNMT affects trophoblast function via inhibiting COMP/CD36/ERK1/2 axis in recurrent spontaneous abortion.

Recurrent spontaneous abortion (RSA) is closely associated with trophoblast dysfunction, yet the underlying regulatory mechanisms remain poorly understood. Herein, we found a significantly decreased level of nicotinamide N-methyltransferase (NNMT) in RSA villous tissues compared to normal pregnancies. NNMT knockdown suppressed trophoblast proliferation, migration and invasion in vitro, and increased embryo absorption rate in vivo.

tRF-5028c disrupts trophoblast function in recurrent spontaneous abortion by inhibiting CRKL-mediated Rap1 signaling pathway.

Background: Recurrent spontaneous abortion (RSA) affects approximately 1-5% of childbearing women and poses a significant threat to global reproductive health. Transfer RNA-derived small RNAs (tsRNAs) are a novel class of noncoding RNAs implicated in various human diseases. However, the role and mechanism of tsRNAs in regulating trophoblast function during RSA development remain unknown.

Dysregulation of ferroptosis-related genes in granulosa cells associates with impaired oocyte quality in polycystic ovary syndrome.

Background: Poor oocyte quality remains one of the major challenges for polycystic ovary syndrome (PCOS) patients during fertilization (IVF) treatment. Granulosa cells (GCs) in PCOS display altered functions and could cause an unfavorable microenvironment for oocyte growth and maturation. Ferroptosis is a new form of programmed cell death, but its role in PCOS has been largely unclarified.

Association between proliferative-to-secretory endometrial compaction and pregnancy outcomes after embryo transfer: a systematic review and meta-analysis.

Study Question: Does the change in endometrial thickness (EMT) from the end of the follicular/estrogen phase to the day of embryo transfer (ET) determine subsequent pregnancy outcomes?

Summary Answer: Endometrial compaction from the late-proliferative to secretory phase is not associated with live birth rate (LBR) and other pregnancy outcomes.

What Is Known Already: Endometrial compaction has been suggested to be indicative of endometrial responsiveness to progesterone, and its association with ET outcome has been investigated but is controversial.

Study Design, Size, Duration: A systematic review with meta-analysis was carried out.

Dietary regulation of intestinal stem cells in health and disease.

Diet is a critical regulator for physiological metabolism and tissue homeostasis, with a close relation to health and disease. As an important organ for digestion and absorption, the intestine comes into direct contact with many dietary components. The rapid renewal of its mucosal epithelium depends on the continuous proliferation and differentiation of intestinal stem cells (ISCs).

Impact of inactivated COVID-19 vaccination on female ovarian reserve: a propensity score-matched retrospective cohort study.

Purpose: To explore the impact of inactivated COVID-19 vaccination on ovarian reserve as assessed by serum anti-Müllerian hormone (AMH) concentration.

Methods: A total of 3160 women were included in this single-center retrospective cohort study between June 2021 and October 2022. Vaccination information were collected from official immunization records available in personal mobile apps.