Evaluation of Lipids and Lipid-Related Transcripts in Human and Ovine Theca Cells and an Mouse Model Exposed to the Obesogen Chemical Tributyltin.

Background: Exposure to obesogenic chemicals has been reported to result in enhanced adipogenesis, higher adipose tissue accumulation, and reduced ovarian hormonal synthesis and follicular function. We have reported that organotins [tributyltin (TBT) and triphenyltin (TPT)] dysregulate cholesterol trafficking in ovarian theca cells, but, whether organotins also exert lipogenic effects on ovarian cells remains unexplored.

Objective: We investigated if environmentally relevant exposures to organotins [TBT, TPT, or dibutyltin (DBT)] induce lipid dysregulation in ovarian theca cells and the role of the liver X receptor (LXR) in this effect.

[The creation of an advanced practice department within a GHT].

In order to meet the health needs of the population, the joint management of three establishments in the Yvelines Nord territorial hospital group has chosen to deploy advanced nursing practice. To facilitate the implementation of these professionals, an innovative organization has been designed, resulting in the creation of a specific department. The advanced practice nurse is part of a coordinated care pathway where his or her pivotal role in patient care leads him or her to develop numerous partnerships.

The organotin triphenyltin disrupts cholesterol signaling in mammalian ovarian steroidogenic cells through a combination of LXR and RXR modulation.

Organotins, a chemical family with over 30 congeners to which humans are directly exposed to through food consumption, are a chemical class widely used as stabilizers in polyvinyl chloride, and biocides in antifouling products. Aside from tributyltin (TBT), toxicological information on other organotin congeners, such as triphenyltin (TPT), remains scarce. Our previous work has demonstrated that TBT can interfere with cholesterol trafficking in steroidogenic cells.

Isolation and characterization of uterine leukocytes collected using a uterine swab technique.

Problem: Leukocytes from the maternal-fetal interface are a valuable tool to study local changes in immune function during pregnancy; however, sampling can be challenging due to inadequate tissue availability and the invasive nature of placental bed biopsy. Here, we aim to purify and characterize leukocytes from paired peripheral and uterine blood samples to assess whether a less invasive method of uterine blood collection could yield a population of enriched uterine leukocytes suitable for ex vivo and in vitro analyses.

Method Of Study: Human peripheral blood mononuclear cells (PBMC) and uterine blood mononuclear cells (UBMC) expressed from surgical gauze post C-section were isolated, and immunophenotypic information was acquired by multi-parameter flow cytometry.

Bisphenol S and Epidermal Growth Factor Receptor Signaling in Human Placental Cytotrophoblasts.

Background: Bisphenol S (BPS) is an endocrine-disrupting chemical and the second most abundant bisphenol detected in humans. BPS exposure leads to reduced binucleate cell number in the ovine placenta. Binucleate cells form by cellular fusion, similar to the human placental syncytiotrophoblast layer.

Bisphenol S enhances gap junction intercellular communication in ovarian theca cells.

Gap junction intercellular communication (GJIC) is necessary for ovarian function, and it is temporospatially regulated during follicular development and ovulation. At outermost layer of the antral follicle, theca cells provide structural, steroidogenic, and vascular support. Inter- and extra-thecal GJIC is required for intrafollicular trafficking of signaling molecules.

Multispecies study: low-dose tributyltin impairs ovarian theca cell cholesterol homeostasis through the RXR pathway in five mammalian species including humans.

Tributyltin (TBT), an organotin chemical used as a catalyst and biocide, can stimulate cholesterol efflux in non-steroidogenic cells. Since cholesterol is the first limiting step for sex hormone production, we hypothesized that TBT disrupts intracellular cholesterol transport and impairs steroidogenesis in ovarian theca cells. We investigated TBT's effect on cholesterol trafficking, luteinization, and steroidogenesis in theca cells of five species (human, sheep, cow, pig, and mice).

Intrauterine cleaning after placental delivery at cesarean section: a randomized controlled trial.

Objective: The objective of this study is to evaluate whether omission of intrauterine cleaning increases intraoperative and postoperative complications among women who deliver via cesarean section.

Methods: We randomized 206 women undergoing primary elective cesarean deliveries to intrauterine cleaning or omission of cleaning. Postpartum endomyometritis rates across groups were the primary outcome.

High correlations in gene expression between paired umbilical cord blood and neonatal blood of healthy newborns on Guthrie cards.

Objective: To examine the correlation in genes expressed in paired umbilical cord blood (UCB) and newborn blood (NB).

Method: Total mRNA and mRNA of three gene sets (inflammatory, hypoxia, and thyroidal response) was assessed using microarray in UCB and NB spotted on Guthrie cards from 7 mother/infant pairs.

Results: The average gene expression correlation between paired UCB and NB samples was 0.

Effect of resistance training and aerobic conditioning on muscular strength and submaximal fitness for individuals with chronic heart failure: influence of age and gender.

The hallmark characteristic of chronic heart failure (CHF) is exercise intolerance. This study evaluated a combined exercise program that would be consistent with current cardiac rehabilitation guidelines. The program consisted of progressive resistance training (intensity progressing from 50 to 80% maximum) and aerobic conditioning (70% of heart rate reserve).