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The pathogenesis of BPD includes inflammation and oxidative stress in the immature lung. Corticosteroids improve respiratory status and outcome, but the optimal treatment regimen for benefit with low systemic effects is uncertain. In a pilot dose escalation trial, we administered ≤5 daily doses of budesonide in surfactant to 24 intubated premature infants (Steroid And Surfactant in ELGANs (SASSIE)). Untargeted metabolomics was performed on dried blood spots using UPLC-MS/MS. https://www.selleckchem.com/products/Camptothecine.html Tracheal aspirate IL-8 concentration was determined as a measure of lung inflammation. Metabolomics data for 829 biochemicals were obtained on 121 blood samples over 96 h from 23 infants receiving 0.025, 0.05, or 0.1 mg budesonide/kg. Ninety metabolites were increased or decreased in a time- and dose-dependent manner at q ≤ 0.1 with overrepresentation in lipid and amino acid super pathways. Different dose response patterns occurred, with negative regulation associated with highest sensitivity to budesonide. Baseline levels of 22 reg-tracheal budesonide in surfactant alters levels of ~11% of detected blood biochemicals in discrete time- and dose-dependent patterns. A subset of glucocorticoid-regulated biochemicals is associated with lung inflammatory status as assessed by lung fluid cytokine concentration. Lower doses of budesonide in surfactant than currently used may provide adequate anti-inflammatory responses in the lung with fewer systemic effects, improving the benefitrisk ratio.The COVID-19 pandemic will leave an indelible mark on the careers of current medical trainees. Given the disruptions to medical education, economic impact on institutions, and the uncertainties around future job prospects, trainees are facing unprecedented challenges. This situation is especially concerning for futures of pediatric physician-scientist trainees, where concerns regarding maintaining the pipeline were well documented prior to the emergence of COVID-19. In this Perspectives article, we leverage the unique expertise of our workgroup to address concerns of physician-scientist trainees and to provide suggestions on how to navigate career trajectories in the post-COVID-19 era. We identified and addressed four major areas of concern lack of in-person conferences and the associated decrease access to mentors and networking activities, decreased academic productivity, diminished job prospects, and mental health challenges. We also suggest actions for trainees, mentors and educational leaders, and institutions to help support trainees during the pandemic, with a goal of maintaining the pediatric physician-scientist pipeline. Perinatal antibiotic treatment alters intestinal microbiota and augments hyperoxia-induced lung injury in mice offspring. The effect of maternal antibiotic treatment (MAT) during pregnancy on the lung microbiota and its relationship with lung injury remains unknown. We fed timed-pregnant C57BL/6N mice sterile drinking water containing antibiotics from gestational day 15 to delivery. Neonatal mice were reared in either room air (RA) or hyperoxia (85% O ) from postnatal days 1 to 7. Four study groups were obtained control + RA, control + O , MAT + RA, and MAT + O . On postnatal day 7, lung and intestinal microbiota were sampled from the left lung and lower gastrointestinal tract. The right lung was harvested for histology and cytokine analysis. MAT during pregnancy significantly reduced the total number of commensal bacteria in the intestine and birth body weight of newborn mice compared with control newborn mice. Neonatal hyperoxia exposure impaired alveolarization and angiogenesis, which was exacerbaexacerbated neonatal hyperoxia-induced intestinal and lung dysbiosis. Neonatal hyperoxia exposure impaired alveolarization and angiogenesis, which was exacerbated by MAT. Avoiding and carefully using antibiotics during pregnancy is a potential therapeutic target for preventing lung injury in hyperoxia-exposed infants. The aim of this study was to assess PA patterns among children and adolescents with inflammatory bowel disease (IBD). Sixty participants with IBD (42 Crohn's disease [CD], 10 ulcerative colitis [UC], and 8 IBD-unclassified [IBD-U], 30 male patients) in remission (n = 45) or with mild disease (n = 15) were compared with 60 healthy age- and sex-matched controls. Each participant wore a triaxial accelerometer during 4 consecutive days for objective daily PA quantification. Overall, there was no significant difference in daily PA patterns between patients with IBD and healthy controls, with 31.7% of patients with IBD and 38.3% of healthy controls fulfilling the recommendation of 60 min of moderate-to-vigorous physical activity (MVPA) daily (NS). Male patients with IBD spent significantly less time in MVPA compared with matched healthy controls (mean difference, 16.2 min day ; p < 0.05). No difference was observed for female patients with IBD. No difference in sedentary pattern between male patients with have reduced moderate-to-vigorous PA. Most patients with IBD do not fulfill the MVPA recommendations for health benefits. Information on cannabinoids in breast milk and maternal cannabis use is limited. We quantified cannabinoids in plasma and breast milk of breastfeeding mothers and assessed cannabis use patterns. This is a prospective study at a university hospital in a state with legal medical and recreational cannabis. Breast milk and plasma samples along with survey data were collected from volunteers using cannabis in the last 48 h at 2 weeks and 2 months postpartum. Twenty subjects were enrolled. Median age (IQR) was 27 (24-34) years. Median (IQR) instances of cannabis use in the last 7 days were visit 1 17 (6-29) and visit 2 23 (15-45). Median (IQR) tetrahydrocannabinol (THC) concentrations were plasma 3.7 ng/ml (0.8-56.8) and breast milk 27.5 ng/ml (0.8-190.5). Median (IQR) cannabidiol (CBD) concentrations were plasma 0.6 ng/ml (0.5-6.4) and breast milk 1.2 ng/ml (0.5-17.0). Median (IQR) THC M/P 7.0 (1.8-34.6) and CBD M/P 2.6. Median breast milk THC concentration increased from visit 1 to visit 2 by 30.2 ng/ml (95% CI 3.
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