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Cohen-Gilbert 2017-09-01 Full Text Available The transition to college is associated with an increase in heavy episodic alcohol use, or binge drinking, during a time when the prefrontal cortex and prefrontal-limbic circuitry continue to mature. Traits associated with this immaturity, including impulsivity in emotional contexts, may contribute to risky and heavy episodic alcohol consumption.
The current study used blood oxygen level dependent (BOLD multiband functional magnetic resonance imaging (fMRI to assess brain activation during a task that required participants to ignore background images with positive, negative, or neutral emotional valence while performing an inhibitory control task (Go-NoGo. Subjects were 23 college freshmen (seven male, 18–20 years who engaged in a range of drinking behavior (past 3 months’ binge episodes range = 0–19, mean = 4.6, total drinks consumed range = 0–104, mean = 32.0.
Brain activation on inhibitory trials (NoGo was contrasted between negative and neutral conditions and between positive and neutral conditions using non-parametric testing (5000 permutations and cluster-based thresholding (z = 2.3, p ≤ 0.05 corrected. Results showed that a higher recent incidence of binge drinking was significantly associated with decreased activation of dorsolateral prefrontal cortex (DLPFC, dorsomedial prefrontal cortex (DMPFC, and anterior cingulate cortex (ACC, brain regions strongly implicated in executive functioning, during negative relative to neutral inhibitory trials. No significant associations between binge drinking and brain activation were observed for positive relative to neutral images. While task performance was not significantly associated with binge drinking in this sample, subjects with heavier recent binge drinking showed decreased recruitment of executive control regions under negative versus neutral distractor conditions.
These findings suggest that in young adults with heavier recent binge drinking, processing of negative emotional. Mahmoud Mansour 2009-01-01 Full Text Available Peroxisome proliferator- activated receptor gamma (PPAR activation decreased serum testosterone (T in women with hyperthecosis and/or polycystic ovary syndrome and reduced the conversion of androgens to estradiol (E2 in female rats. This implies modulation of female sex steroid hormones by PPAR. It is not clear if PPAR modulates sex steroid hormones in diabetic males.
Because PPAR activation by thiazolidinedione increased insulin sensitivity in type 2 diabetes, understanding the long term impact of PPAR activation on steroid sex hormones in males is critical. Our objective was to determine the effect of PPAR activation on serum and intratesticular T, luteinizing hormone (LH, follicle stimulating hormone (FSH and E2 concentrations in male Zucker diabetic fatty (ZDF rats treated with the PPAR agonist rosiglitazone (a thiazolidinedione. Treatment for eight weeks increased PPAR mRNA and protein in the testis and elevated serum adiponectin, an adipokine marker for PPAR activation. PPAR activation did not alter serum or intratesticular T concentrations. In contrast, serum T level but not intratesticular T was reduced by diabetes.
Neither diabetes nor PPAR activation altered serum E2 or gonadotropins FSH and LH concentrations. The results suggest that activation of PPAR by rosiglitazone has no negative impact on sex hormones in male ZDF rats.
Des Field Full Text Available Nisin is a bacteriocin widely utilized in more than 50 countries as a safe and natural antibacterial food preservative. It is the most extensively studied bacteriocin, having undergone decades of bioengineering with a view to improving function and physicochemical properties. The discovery of novel nisin variants with enhanced activity against clinical and foodborne pathogens has recently been described. We screened a randomized bank of nisin A producers and identified a variant with a serine to glycine change at position 29 (S29G, with enhanced efficacy against S.
Aureus SA113. Using a site-saturation mutagenesis approach we generated three more derivatives (S29A, S29D and S29E with enhanced activity against a range of Gram positive drug resistant clinical, veterinary and food pathogens. In addition, a number of the nisin S29 derivatives displayed superior antimicrobial activity to nisin A when assessed against a range of Gram negative food-associated pathogens, including E. Coli, Salmonella enterica serovar Typhimurium and Cronobacter sakazakii. This is the first report of derivatives of nisin, or indeed any lantibiotic, with enhanced antimicrobial activity against both Gram positive and Gram negative bacteria. Field, Des; Begley, Maire; O’Connor, Paula M.; Daly, Karen M.; Hugenholtz, Floor; Cotter, Paul D.; Hill, Colin; Ross, R. Paul 2012-01-01 Nisin is a bacteriocin widely utilized in more than 50 countries as a safe and natural antibacterial food preservative.
It is the most extensively studied bacteriocin, having undergone decades of bioengineering with a view to improving function and physicochemical properties. The discovery of novel nisin variants with enhanced activity against clinical and foodborne pathogens has recently been described.
We screened a randomized bank of nisin A producers and identified a variant with a serine to glycine change at position 29 (S29G), with enhanced efficacy against S. Aureus SA113. Using a site-saturation mutagenesis approach we generated three more derivatives (S29A, S29D and S29E) with enhanced activity against a range of Gram positive drug resistant clinical, veterinary and food pathogens. In addition, a number of the nisin S29 derivatives displayed superior antimicrobial activity to nisin A when assessed against a range of Gram negative food-associated pathogens, including E. Coli, Salmonella enterica serovar Typhimurium and Cronobacter sakazakii. This is the first report of derivatives of nisin, or indeed any lantibiotic, with enhanced antimicrobial activity against both Gram positive and Gram negative bacteria.
PMID:23056510. Ayman Al-Mariri 2014-01-01 Full Text Available Background: Medicinal plants are considered new resources for producing agents that could act as alternatives to antibiotics in the treatment of antibiotic-resistant bacteria.
The aim of this study was to evaluate the antibacterial activity of 28 plant extracts and oils against four Gram- negative bacterial species. Methods: Experimental, in vitro, evaluation of the activities of 28 plant extracts and oils as well as some antibiotics against E. Coli O157:H7, Yersinia enterocolitica O9, Proteus spp., and Klebsiella pneumoniae was performed. The activity against 15 isolates of each bacterium was determined by disc diffusion method at a concentration of 5%. Microdilution susceptibility assay was used in order to determine the minimal inhibitory concentrations (MICs of the plant extracts, oils, and antibiotics. Results: Among the evaluated herbs, only Origanum syriacum L., Thymus syriacus Boiss., Syzygium aromaticum L., Juniperus foetidissima Wild, Allium sativum L., Myristica fragrans Houtt, and Cinnamomum zeylanicum L.
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Essential oils and Laurus nobilis L. Plant extract showed anti-bacterial activity. The MIC50 values of these products against the Gram- negative organisms varied from 1.5 (Proteus spp. Pneumoniae( and 6.25 µl/ml (Yersinia enterocolitica O9 to 12.5 µl/ml (E. Conclusion: Among the studied essential oils, O. Syriacum L., T.
Syriacus Boiss., C. Zeylanicum L., and S.
Aromaticum L. Essential oils were the most effective. Moreover, Cephalosporin and Ciprofloxacin were the most effective antibiotics against almost all the studied bacteria. Therefore, O.
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Syriacum L., T. Syriacus Boiss., C. Zeylanicum L., and S. Aromaticum L. Could act as bactericidal agents against Gram- negative bacteria. Nelson William B 2009-06-01 Full Text Available Abstract Background Left ventricular dysfunction is common after coronary artery bypass graft and valve replacement surgeries and is often treated with inotropic drugs to maintain adequate hemodynamic status.
In this study, we aimed to identify the demographic, clinical, laboratory, echocardiographic and hemodynamic factors that are associated with use of inotropic drugs in patients undergoing concomitant coronary artery bypass graft and aortic valve replacement surgery. Methods The study included 97 patients who had undergone concomitant coronary artery bypass graft and aortic valve replacement at Regions Hospital, University of Minnesota Medical School from January 2006 to December 2008. All data were collected retrospectively after reviewing electronic medical records.
Inotropic support was defined as the use of dopamine greater than or equal to 5 ug/kg/min; any dose of epinephrine, norepinephrine, dobutamine, and milrinone at the separation from cardiopulmonary bypass. Results Inotropic support was used in a total of 50 patients (52% at the separation from cardiopulmonary bypass. Average age of the patients requiring inotropic support was 72.2 +/- 8.8 years. The study identified four significant, independent predictors of inotrope use: (1 Cardiac index less than or equal to2.5 L/min/m2, (2 LVEDP greater than or equal to 20 mm Hg, (3 LVEF less than or equal to40%, and (4 CKD stage 3 to 5. Conclusion We identified four independent risk factors for postoperative use of inotropic support in patients undergoing concomitant coronary artery bypass graft and arotic valve replacement surgery at the separation from cardiopulmonary bypass. The study results will be helpful to prospectively identify patients who will likely to require inotropic support at the separation from cardiopulmonary bypass.
Verma, Sean; Bassily, Emmanuel; Leighton, Shane; Mhaskar, Rahul; Sunjic, Igor; Martin, Angel; Rihana, Nancy; Jarmi, Tambi; Bassil, Claude 2017-07-01 Left ventricular assist device (LVAD) and inotrope therapy serve as a bridge to transplant (BTT) or as destination therapy in patients who are not heart transplant candidates. End-stage heart failure patients often have impaired renal function, and renal outcomes after LVAD therapy versus inotrope therapy have not been evaluated. In this study, 169 patients with continuous flow LVAD therapy and 20 patients with continuous intravenous inotrope therapy were analyzed.
The two groups were evaluated at baseline and at 3 and 6 months after LVAD or inotrope therapy was started. The incidence of acute kidney injury (AKI), need for renal replacement therapy (RRT), BTT rate, and mortality for 6 months following LVAD or inotrope therapy were studied.
Results between the groups were compared using Mann-Whitney U test and Chi-square with continuity correction or Fischer's exact at the significance level of 0.05. Mean glomerular filtration rate (GFR) was not statistically different between the two groups, with P = 0.471, 0.429, and 0.847 at baseline, 3 and 6 months, respectively. The incidence of AKI, RRT, and BTT was not statistically different. Mortality was less in the inotrope group (P.