Single-Cell RNA Sequencing to Guide Autologous Preterm Cord Mesenchymal Stromal Cell-Therapy.

Rationale: The chronic lung disease bronchopulmonary dysplasia (BPD) remains the most common complication of extreme prematurity (<28 weeks of gestation). Umbilical cord-derived mesenchymal stromal cells (UC-MSCs) represent an opportunity for autologous cell-therapy, as UC-MSCs have been shown to improve lung function and structure in experimental BPD. However, characterization and repair capacity of UC-MSCs derived from donors with pregnancy-related complications associated with prematurity remain unexplored.

Delphi-driven consensus definition for mesenchymal stromal cells and clinical reporting guidelines for mesenchymal stromal cell-based therapeutics.

Background Aims: Despite promising results in pre-clinical studies, mesenchymal stromal cells (MSCs) face significant challenges in clinical translation. A scoping review by our group highlighted two key issues contributing to this gap: (i) lack of a clear and consensus definition for MSCs and (ii) under-reporting of critical parameters in MSC clinical studies. To address these issues, we conducted a modified Delphi study to establish and implement a consensus definition for MSCs and develop reporting guidelines for MSC clinical studies.

Single-Cell RNA Sequencing Reveals Repair Features of Human Umbilical Cord Mesenchymal Stromal Cells.

The chronic lung disease bronchopulmonary dysplasia (BPD) is the most severe complication of extreme prematurity. BPD results in impaired lung alveolar and vascular development and long-term respiratory morbidity, for which only supportive therapies exist. Umbilical cord-derived mesenchymal stromal cells (UC-MSCs) improve lung structure and function in experimental BPD.

Dynamics of the digestive acquisition of bacterial carriage and integron presence by French preterm newborns according to maternal colonization: The DAIR3N multicentric study.

Objectives: The study aimed to describe the dynamics and risk factors of Gram-negative bacteria (GNB) acquisition in preterm infants.

Methods: This prospective multicenter French study included mothers hospitalized for preterm delivery and their newborns, followed until hospital discharge. Maternal feces and vaginal fluids at delivery, and neonatal feces from birth to discharge were tested for cultivable GNB, potential acquired resistance, and integrons.

Definition and Characteristics of Mesenchymal Stromal Cells in Preclinical and Clinical Studies: A Scoping Review.

Mesenchymal stromal cells (MSCs) are widely used in preclinical and clinical research. Despite minimal criteria to define MSCs provided by the International Society for Cell and Gene Therapy (ISCT), concerns have been raised about inconsistent descriptions of cell products used. To address the question "How are MSCs currently defined and characterized?" we conducted a scoping review on original MSC preclinical and clinical studies published over a 3-month period.

Optimising homeothermy in neonates: A systematic review and clinical guidelines from the French Neonatal Society.

Aim: Thermal instability is harmful on the newborn infant. We sought to draw up practical guidelines on maintaining homeothermy alongside skin-to-skin contact.

Methods: A systematic analysis of the literature identified relevant studies between 2000 and 2021 in the PubMed database.

Establishment of a consensus definition for mesenchymal stromal cells (MSC) and reporting guidelines for clinical trials of MSC therapy: a modified Delphi study protocol.

Introduction: Despite being more than two decades of research, mesenchymal stromal cell (MSC) treatments are still struggling to cross the translational gap. Two key issues that likely contribute to these failures are (1) the lack of clear definition for MSC and (2) poor quality of reporting in MSC clinical studies. To address these issues, we propose a modified Delphi study to establish a consensus definition for MSC and reporting guidelines for clinical trials of MSC therapy.

Newborn Life Support course: does it make me more confident when resuscitating a newborn?

Aim: To describe the effectiveness of the Newborn Life Support (NLS) course in terms of attendees' knowledge, perceived self-efficacy, and clinical applicability.

Methods: We conducted an electronic survey of NLS course attendees (NLS + group). A control group (NLS-) was recruited via our regional perinatal network.

Single cell transcriptomic analysis of murine lung development on hyperoxia-induced damage.

During late lung development, alveolar and microvascular development is finalized to enable sufficient gas exchange. Impaired late lung development manifests as bronchopulmonary dysplasia (BPD) in preterm infants. Single-cell RNA sequencing (scRNA-seq) allows for assessment of complex cellular dynamics during biological processes, such as development.

Benefits and obstacles to cell therapy in neonates: The INCuBAToR (Innovative Neonatal Cellular Therapy for Bronchopulmonary Dysplasia: Accelerating Translation of Research).

Cell-based therapies hold promise to substantially curb complications from extreme preterm birth, the main cause of death in children below the age of 5 years. Exciting preclinical studies in experimental neonatal lung injury have provided the impetus for the initiation of early phase clinical trials in extreme preterm infants at risk of developing bronchopulmonary dysplasia. Clinical translation of promising therapies, however, is slow and often fails.

Two Novel Homozygous Mutations in Phosphoglucomutase 3 Leading to Severe Combined Immunodeficiency, Skeletal Dysplasia, and Malformations.

Phosphoglucomutase 3 (PGM3) deficiency is a rare congenital disorder of glycosylation. Most of patients with autosomal recessive hypomorphic mutations in PGM3 encoding for phosphoglucomutase 3 present with eczema, skin and lung infections, elevated serum IgE, as well as neurological and skeletal features. A few PGM3-deficient patients suffer from a more severe disease with nearly absent T cells and severe skeletal dysplasia.

A lung tropic AAV vector improves survival in a mouse model of surfactant B deficiency.

Surfactant protein B (SP-B) deficiency is an autosomal recessive disorder that impairs surfactant homeostasis and manifests as lethal respiratory distress. A compelling argument exists for gene therapy to treat this disease, as de novo protein synthesis of SP-B in alveolar type 2 epithelial cells is required for proper surfactant production. Here we report a rationally designed adeno-associated virus (AAV) 6 capsid that demonstrates efficiency in lung epithelial cell transduction based on imaging and flow cytometry analysis.

Nasal high-frequency percussive ventilation vs nasal continuous positive airway pressure in newborn infants respiratory distress: A cross over clinical trial.

Objective: To determine if nasal high-frequency percussive ventilation (nHFPV) to manage neonatal respiratory distress decreases the regional cerebral oxygen saturation (rScO ) compared to nasal continous positive airway pressure (nCPAP).

Study Design: A prospective, randomized, monocentric, open-label, noninferiority crossover trial. Newborns of gestational age (GA) ≥ 33 weeks exhibiting persistent respiratory distress after 10 minutes of life were treated with nHFPV and nCPAP, in succession and in random order.

Satisfaction of mothers regarding human milk donation.

In France, human milk banks are in charge of the collection, analysis, processing, and distribution of human milk to neonatology centers for preterm infants. Knowledge of what motivates mothers to donate their milk could lead to better communication regarding human milk donation. A satisfaction survey was conducted among mothers who were donating their milk to a human milk bank.

Recommendation for hygiene and topical in neonatology from the French Neonatal Society.

We sought to establish guidelines for hygiene care in newborns based on a systematic review of the literature and grading of evidence using the Groupe de Réflexion et d'Evaluation de l'Environement des Nouveau-nés (GREEN) methodology. We examined 45 articles and 4 reports from safety agencies. These studies recommend a tub bath (rather than a sponge bath) for full-term infants and a swaddle bath for preterm newborns.

Prevention and management of genital herpes simplex infection during pregnancy and delivery: Guidelines from the French College of Gynaecologists and Obstetricians (CNGOF).

Objective: Identify measures to diagnose, prevent, and treat genital herpes infection during pregnancy and childbirth as well as neonatal herpes infection.

Materials And Methods: Bibliographic search from the Medline and Cochrane Library databases and review of international clinical practice guidelines.

Results: Genital herpes lesions are most often due to HSV-2 (LE2).

[Neonatal herpes: Epidemiology, clinical manifestations and management. Guidelines for clinical practice from the French College of Gynecologists and Obstetricians (CNGOF)].

Objectives: To describe the epidemiology of neonatal herpes and its risk factors, clinical and paraclinic manifestations, propose guidelines for a newborn at risk of neonatal herpes, describe treatment modalities, describe post-natal transmission and its prevention.

Methods: Bibliographic search from Medline, Cochrane Library databases and research of international clinical practice guidelines.

Results: Neonatal herpes is rare (about 20 cases per year in France) and mainly due to HSV 1 (level of evidence LE3).

[Not Available].

Objective: Identify measures to diagnose, prevent and treat genital herpes infection during pregnancy and childbirth and neonatal infection.

Methods: Bibliographic search from Medline, Cochrane Library databases and research of international clinical practice guidelines.

Results: Genital herpes lesion is most often due to HSV2 (LE2).