Mitochondrial inefficiency in infants born to overweight African-American mothers.

BACKGROUND: Currently 20-35% of pregnant women are obese, posing a major health risk for mother and fetus. It is postulated that an abnormal maternal-fetal nutritional environment leads to adverse metabolic programming, resulting in altered substrate metabolism in the offspring and predisposing to risks of obesity and diabetes later in life. Data indicate that oocytes from overweight animals have abnormal mitochondria. We hypothesized that maternal obesity is associated with altered mitochondrial function in healthy neonatal offspring. METHODS: Overweight and obese (body mass index, (BMI) ≥ 25 kg/m2, n = 14) and lean (BMI < 25 kg/m2, n = 8), African-American pregnant women carrying male fetuses were recruited from the Barnes Jewish Hospital obstetric clinic. Maternal and infant data were extracted from medical records. Infants underwent body composition testing in the first days of life. Circumcision skin was collected for isolation of fibroblasts. Fibroblast cells were evaluated for mitochondrial function, metabolic gene expression, nutrient uptake, and oxidative stress. RESULTS: Skin fibroblasts of infants born to overweight mothers had significantly higher mitochondrial respiration without a concurrent increase in ATP production, indicating mitochondrial inefficiency. These fibroblasts had higher levels of reactive oxygen species and evidence of oxidative stress. Evaluation of gene expression in offspring fibroblasts revealed altered expression of multiple genes involved in fatty acid and glucose metabolism and mitochondrial respiration in infants of overweight mothers. CONCLUSIONS: This study demonstrates altered mitochondrial function and oxidative stress in skin fibroblasts of infants born to overweight mothers. Future studies are needed to determine the long-term impact of this finding on the metabolic health of these children.

Language Matters: Race, Trust, and Outcomes in the Pediatric Emergency Department.

OBJECTIVE: Trust in physicians and health care system has been positively associated with health care outcomes. The purpose of this study is to explore the relationships among race, ethnicity, language, trust, and health care outcomes. METHODS: This prospective cross-sectional study took place in the pediatric emergency department of an intercity hospital. English- and Spanish-speaking guardians were asked to complete a demographic survey, the Pediatric Trust in Physicians Scale, and the Group-Based Medical Mistrust Scale. RESULTS: Four hundred seventy-five parents were surveyed, of which 21.35% identified as white, 35.05% as African American, and 53.26% as Hispanic; with respect to language: 88% English-speaking and 12% Spanish-speaking. No significant difference was seen in trust scores for sex, ethnicity, or religious affiliation. Non-Hispanics and English speakers demonstrated an overall higher trust in their physician. English-speaking participants were found to have higher percentages in all measured emergency department variables compared to Spanish speakers, including admittance (9.09% and 0.93%, respectively) as well as receiving interventions (42.34% and 5.53%, respectively). CONCLUSIONS: Our study shows that race and ethnicity influence trust and mistrust as well as actual health care outcomes. Interestingly, language barrier proved to be one of the greatest causes of health care disparities. Therefore, more research is needed to find a way to bridge the increasing language barrier between physicians and patients.

Therapeutic Plasma Exchange for Refractory Hemolysis After Brown Recluse Spider (Loxosceles reclusa) Envenomation.

INTRODUCTION: The brown recluse spider (BRS) (Loxosceles reclusa) envenomation can lead to multiple complications, including hemolysis. We present a case of refractory hemolysis after a BRS bite treated with therapeutic plasma exchange (TPE). CASE REPORT: A 17-year-old female presented with fever, fatigue, and dyspnea. She was diagnosed with sepsis and received intravenous (IV) fluids, inotropic support, and antibiotics. On hospital day 1 she was noted to have skin lesion consistent with a BRS bite and developed hemolysis. Systemic loxoscelism with hemolysis was then suspected and methylprednisolone IV was initiated. She was discharged with a stable HGB on hospital day 3 on oral prednisolone. She was re-admitted 24 h later, with signs of worsening hemolysis. Methylprednisolone was restarted and she was transfused 4 units of packed red blood cells. TPE was initiated due to the refractory hemolysis. Shortly after the TPE session, her clinical and laboratory status improved. She required no further transfusions and was discharged on a steroid taper. DISCUSSION: TPE is an extra-corporeal method to remove substances from the blood by separating plasma from cellular blood components and replacing it with physiologic fluids. TPE has been used for snake envenomation but there are no reports detailing its use for BRS envenomations. Improvement was associated with TPE initiation and may have been due to removal of complement components activated by the spider venom. This report suggests that TPE could be a possible treatment modality for systemic loxoscelism with refractory hemolysis due to BRS envenomation. Further investigation is warranted.