The effect of diet on total antioxidant status,ceruloplasmin, transferrin and ferritin serum levels in phenylketonuric children

Objectives: To investigate the effect of diet on total antioxidative status (TAS), transferrin, ferritin and ceruloplasmin serum levels in phenylketonuric (PKU) children. Patients and methods: Seventeen poorly controlled PKU children underwent clinical and laboratory examinations before, ‘off diet’, and 60 days after adhering to their special diet ‘on diet’, whereas controls (N = 24) were examined once. Blood chemistry was performed with the appropriate methodologies. Results: Phenylalanine levels differed significantly among the examined groups. Lipids and lipoproteins were higher in ‘off diet’ than in ‘on diet’ group, except of high density lipoprotein and apolipoprotein AI that remained unaffected. Total antioxidative status (386 ± 30 vs 204 ± 23 μmol/L, p < 0.001), ferritin (48.2 ± 2.3 vs 33.0 ± 2.8 μg/L, p < 0.001) and ceruloplasmin (40.02 ± 2.5 vs 25.5 ± 2.8 mg/dL, p < 0.001) levels were significantly higher in ‘on diet’ patients’ group compared to ‘off diet’ one. The low lipoprotein and the high TAS and ferritin levels in patients with PKU ‘on diet’ may be related to the vegetarian diet and the rich in iron formula supplementation. Conclusions: The low ferritin levels found in ‘off diet’ patients with PKU may be attributed to a decreased liver production of ceruloplasmin, which evaluation may be a useful tool for the follow‐up of patients with PKU.     

Bench-to-bedside review: Targeting antioxidants to mitochondria in sepsis

Development of organ dysfunction associated with sepsis is now accepted to be due at least in part to oxidative damage to mitochondria. Under normal circumstances, complex interacting antioxidant defense systems control oxidative stress within mitochondria. However, no studies have yet provided conclusive evidence of the beneficial effect of antioxidant supplementation in patients with sepsis. This may be because the antioxidants are not accumulating in the mitochondria, where they are most needed. Antioxidants can be targeted selectively to mitochondria by several means. This review describes the in vitro studies and animal models of several diseases involving oxidative stress, including sepsis, in which antioxidants targeted at mitochondria have shown promise, and the future implications for such approaches in patients.     

Bradycardia without associated hypertension: a common sign of ventriculo-peritoneal shunt malfunction

Introduction  

Delayed diagnosis of ventriculo-peritoneal (VP) shunt malfunction results in avoidable morbidity and mortality. One reason is that most of the signs of shunt malfunction have low specificity.     

Women in power: New leadership in the health industry

The health industry may be the prototype for changing gender roles among managers. Already women dominate mid‐level management positions. Meager data exist on senior health executives. In this exploratory study we examine the professional experiences of nationally prominent women leaders in Washington, D.C., who have recently been at the forefront of changing national health policy. Their career development, management styles, and influence in national health policy are discussed and analyzed. The leadership style of these women differs from the traditional male style, and they experienced role conflicts in their rise to power. The women in this study may be foreshadowing the roles of new leaders in the health industry in the 1990s.     

Staurosporine‐induced collapse of cochlear hair bundles

Early postnatal mouse cochlear cultures were treated with a small panel of kinase inhibitors to elucidate the mechanisms underlying the maintenance of hair‐bundle structure in the developing inner ear. At low concentrations (1–10 nM), staurosporine causes the collapse and loss of hair bundles without provoking hair‐cell death, as judged by lack of terminal transferase dUTP nick end labeling (TUNEL) labeling or reactivity to anti‐activated caspase‐3. Staurosporine exposure results in the fusion of the hair bundle's stereocilia, a resorption of the parallel actin bundles of the stereocilia into the cytoplasm of the hair cell, a detachment of the apical, non‐stereociliary membrane of the hair cell from the underlying cuticular plate, and a severing of the hair‐bundle's rootlets from the actin cores of the stereocilia. It does not block membrane retrieval at the apical pole of the hair cells, nor does it elicit the externalization of phosphatidylserine. Staurosporine treatment causes a reduction in levels of the phosphorylated forms of ezrin, radixin, and moesin in cochlear cultures during the period of hair‐bundle loss, indicating the integrity of the hair bundle may be actively maintained by the phosphorylation status of these proteins. J. Comp. Neurol. 522:3281–3294, 2014. © 2014 The Authors The Journal of Comparative Neurology Published by Wiley Periodicals, Inc.