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Publication
Journal: Data in Brief
July/12/2016
Abstract
Human Tousled kinase 1 (TLK1) plays an important role in chromatin remodeling, replication, and DNA damage response and repair. TLK1 activity is immediately, but transiently, downregulated after genotoxic insult, and its recovery is important for exit from checkpoint arrest and cell survival after radiation. The data in this article compliments research presented in the paper titled, "Tousled kinase activator, gallic acid, promotes DNA repair and suppresses radiation cytotoxicity in salivary gland cells" [1]. The identification of small molecule activators and inhibitors of TLK1 provided an opportunity to pharmacologically alter the protein׳s activity to elucidate its role in DNA damage response pathways. TLK1 effectors, gallic acid (GA) and thioridazine (THD) activate and inhibit the kinase, respectively, and the data report on the impact of these compounds and the significance of TLK1 to DNA break repair and the survival of human salivary acinar cells.
Publication
Journal: Journal of the autonomic nervous system
March/19/1998
Abstract
The neurones and microvessels of the dorsal motor nucleus of the vagus (DMN), the nucleus ambiguus (NA) and the nucleus tractus solitarius (NTS) of 4, 24 and 30 month male Wistar rats have been examined morphometrically and by quantitative enzyme histochemical methods (4 and 24 months only) to assess the affects of old age on the structure and activity of their neurones. DMN and NTS neuronal soma area increased whilst NA neuronal area was reduced in the aged groups; the changes in neuronal size were reflected in the density of neurones per unit area. The mean diameter and percentage area occupied by microvessels was unchanged with increased age in all three nuclei. Quantitative assessment of cytochrome oxidase and NADH-tetrazolium reductase activities in the nuclei revealed no changes in old age, indicating that old age does not affect neuronal or metabolic activity of central vagal neurones. These results compliment previous age-related studies on the vagus nerve and nodose ganglion in which little change has been reported, suggesting that the vagal system is well preserved in aged rats.
Publication
Journal: Der Urologe
March/28/2004
Abstract
Erectile dysfunction (ED) management in the following 3-5 years will be dominated by substances targeting the L-arginine-NO-guanylate cyclase-cGMP-PDE-5 pathway, resulting in an intracellular elevation of the cGMP concentrations. Promising alternatives to the PDE-5 inhibitors, such as guanylate cyclase activators and Rho-kinase inhibitors, may also effectively compliment a PDE-5 inhibitor. Intranasal application of the melanocortin agonist PT 141 (Melanotan II) seems to be promising. As scheduled sexual activities are not preferred by the majority of couples, the future of ED-therapy will focus on drugs with a 1-2 day long efficacy window, or a daily bedtime application of low dosage agents which result in nocturnal reoxygenation of the cavernous bodies and in turn in functional improvement. Elevation of the cGMP levels and improvement of endothelial function as a result of this approach also promises benefits in cardiovascular diseases and in LUTS.
Authors
Publication
Journal: British Journal of Pharmacology
June/18/2006
Abstract
The beta-adrenoceptor agonist, isoprenaline, elicits vasodilation and tachycardia in anesthetized rats via activation of propranolol-sensitive beta1- and beta2-adrenoceptors and also by propranolol-insensitive beta1- and beta3-adrenoceptors. The aim of this study was to determine whether the relative contribution of propranolol-sensitive and -insensitive beta-adrenoceptors to the changes in heart rate (HR) and vascular resistances elicited by isoprenaline is altered after blockade of nitric oxide (NO) synthase, in pentobarbital-anesthetized rats. The hemodynamic responses elicited by isoprenaline (0.1 and 0.5 microg kg(-1), i.v.) were determined before and after injection of saline or the NO synthase inhibitor, N(G)-nitro-L-arginine methylester (L-NAME, 50 micromol kg(-1), i.v.), and again after injection of the beta1- and beta2-adrenoceptor antagonist, propranolol (1 mg kg(-1), i.v.). The responses elicited by the above doses of isoprenaline were also determined before and during infusion of the alpha1-adrenoceptor agonist, phenylephrine (3 microg kg(-1) min(-1), i.v.), and again 15-20 min after injection of propranolol (1.0 mg kg(-1), i.v.). Both doses of isoprenaline elicited tachycardia and reductions in vascular resistances. Propranolol eliminated the responses elicited by the lower dose of isoprenaline and substantially diminished the responses elicited by the higher dose of the beta1-, beta2- and beta3-adrenoceptor agonist. The maximal vasodilator responses elicited by both doses of isoprenaline were not diminished whereas the maximal increases in HR were higher after injection of L-NAME. The ability of propranolol to diminish the hemodynamic actions of isoprenaline was substantially diminished in L-NAME-treated rats, whereas propranolol retained its potency in rats that received an equi-pressor infusion of the alpha1-adrenoceptor agonist, phenylephrine. The finding that the maximal vasodilator responses elicited by isoprenaline were not diminished by L-NAME suggests that the vasodilation elicited by this drug was due to direct activation of beta-adrenoceptors on vascular smooth muscle and that the full compliment of isoprenaline-sensitive receptors was not changed after inhibition of NO synthesis. However, these results suggest that the activities of propranolol-sensitive beta-adrenoceptors are downregulated, whereas propranolol-insensitive beta-adrenoceptors are upregulated upon the loss of exposure to endothelial nitrosyl factors.
Publication
Journal: Accounts of Chemical Research
November/20/2017
Abstract
Aromatic compounds and polymers are integrated into organic field effect transistors, light-emitting diodes, photovoltaic devices, and redox-flow batteries. These compounds and materials feature increasingly complex designs, and substituents influence energy levels, bandgaps, solution conformation, and crystal packing, all of which impact performance. However, many polycyclic aromatic hydrocarbons of interest are difficult to prepare because their substitution patterns lie outside the scope of current synthetic methods, as strategies for functionalizing benzene are often unselective when applied to naphthalene or larger systems. For example, cross-coupling and nucleophilic aromatic substitution reactions rely on prefunctionalized arenes, and even directed metalation methods most often modify positions near Lewis basic sites. Similarly, electrophilic aromatic substitutions access single regioisomers under substrate control. Cycloadditions provide a convergent route to densely functionalized aromatic compounds that compliment the above methods. After surveying cycloaddition reactions that might be used to modify the conjugated backbone of poly(phenylene ethynylene)s, we discovered that the Asao-Yamamoto benzannulation reaction is notably efficient. Although this reaction had been reported a decade earlier, its scope and usefulness for synthesizing complex aromatic systems had been under-recognized. This benzannulation reaction combines substituted 2-(phenylethynyl)benzaldehydes and substituted alkynes to form 2,3-substituted naphthalenes. The reaction tolerates a variety of sterically congested alkynes, making it well-suited for accessing poly- and oligo(ortho-arylene)s and contorted hexabenzocoronenes. In many cases in which asymmetric benzaldehyde and alkyne cycloaddition partners are used, the reaction is regiospecific based on the electronic character of the alkyne substrate. Recognizing these desirable features, we broadened the substrate scope to include silyl- and halogen-substituted alkynes. Through a combined experimental and computational approach, we have elucidated mechanistic insight and key principles that govern the regioselectivity outcome of the benzannulation of structurally diverse alkynes. We have applied these methods to prepare sterically hindered, shape-persistent aromatic systems, heterocyclic aromatic compounds, functionalized 2-aryne precursors, polyheterohalogenated naphthalenes, ortho-arylene foldamers, and graphene nanoribbons. As a result of these new synthetic avenues, aromatic structures with interesting properties were uncovered such as ambipolar charge transport in field effect transistors based on our graphene nanoribbons, conformational aspects of ortho-arylene architectures resulting from intramolecular π-stacking, and modulation of frontier molecular orbitals via protonation of heteroatom containing aromatic systems. Given the availability of many substituted 2-(phenylethynyl)benzaldehydes and the regioselectivity of the benzannulation reaction, naphthalenes can be prepared with control of the substitution pattern at seven of the eight substitutable positions. Researchers in a range of fields are likely to benefit directly from newly accessible molecular and polymeric systems derived from polyfunctionalized naphthalenes.
Publication
Journal: Scientific Reports
February/19/2017
Abstract
Whilst resonant transmission is well understood and can be fully harnessed for crystalline superlattices, a complete picture has not yet emerged for disordered superlattices. It has proven difficult to tune resonant transmission in disordered diamond-like carbon (DLC) superlattices as conventional models are not equipped to incorporate significant structural disorder. In this work, we present concurrent experimental and theoretical analysis which addresses resonant transmission in DLC superlattices. Devices were fabricated by growing alternate layers of DLC with different percentages of sp3 hybridized carbon.Coherent quantum transport effects were demonstrated in these structurally disordered DLC superlattices through distinct current modulation with negative differential resistance (NDR) in the current-voltage (I-V) measurements. A model was developed using tight-binding calculations assuming a random variation of the hopping integral to simulate structural (bond-length) disorder. Calculations of the I-V characteristics compliment the interpretation of the measurements and illustrate that while DLC superlattice structures are unlike their classical counterparts, the near-field structural order will help with the confinement of quantised states. The present model provides an empirical guide for tailoring the properties of future devices, giving rise to much hope that carbon electronics operating at high frequencies over large areas can now be developed.
Publication
Journal: Analyst, The
October/6/2003
Abstract
Fluoropolymers are widely used in industry and consumer products. At the thermal limit of their stability (e.g.>> 260 degrees C for PTFE) numerous studies have reported a variety of thermolysis products produced upon polymer breakdown. In the current investigations our objective was to expand the knowledge of these products by advancing the techniques used to obtain their identity. The use of 19F NMR to compliment derivatization with GC-MS has been shown to facilitate the identification of novel fluorinated species, in particular fluorinated acids, that had, until recently, gone previously unreported for the thermal decomposition of fluorinated polymers using traditional techniques. The polymers chosen for the decomposition studies were poly(tetrafluoroethylene), poly(chlorotrifluoroethylene), poly(ethylene-chlorotrifluoroethylene) and poly(tetrafluoroethylene-co-tetrafluoroethylene perfluoropropyl ether) which cover the three major classes of industrially produced fluoro-polymer, co-polymer and elastomer. The use of 1D 19F and 2D 19F-19F correlation spectroscopy (COSY) NMR allowed for the observation of polyfluorinated acids and their atmospheric precursors. This in turn allowed the modification of GC-MS procedures to verify these NMR findings. NMR results also showed a plethora of unidentified and previously unreported materials, thermolysis products that await characterization.
Publication
Journal: Cancer Letters
February/27/2018
Abstract
Electrochemotherapy is an evolving therapy which has recently been shown to induce an immunogenic form of cell death. It is hypothesized that the immunogenic cell death induced by electrochemotherapy may compliment the responses seen with anti-cancer immunotherapies. We therefore examined the effect of electrochemotherapy in combination with ICOS activation, which promotes the activity of previously activated T cells. In comparison to either monotherapy which resulted in no curative outcomes in any model, in a CT26 primary tumour 50% of mice were cured, with 100% of cured mice surviving tumour rechallenge. In a dual flank CT26 model mimicking secondary disease 20% of mice were cured, and 30% of mice were cured using an aggressively metastatic Lewis Lung Carcinoma model. We have shown the novel combination of electrochemotherapy with ICOS activation can inhibit local and distal tumour growth, including total tumour clearance with long lasting immunological memory.
Publication
Journal: Journal of Biomedical Nanotechnology
March/20/2019
Abstract
Klebsiella pneumoniae is a common human pathogen that causes several nosocomial chronic infections. Many methods have been reported to detect Klebsiella pneumonia; however, a simple, rapid, and visual method remains to be developed. Here, we developed a rapid, visual detection method employing a nanoparticle immunosensor (NPIS) with a sensitivity of 8 CFU mL-1. Two monoclonal antibodies (mAbs) recognizing different antigenic determinants on the surface of Klebsiella pneumonia were screened by an indirect enzyme-linked immunosorbent assay (ELISA), Western blotting, and mass spectrometry assay. The mAb 1E6 was conjugated to magnetic nanoparticles (MNPs) to generate the immuno-magnetic nanoparticles (IMNPs), whereas the horseradish peroxidase (HRP)-mAb probe was synthesized by conjugating the mAb 2F1 with HRP. Thereafter, the NPIS was developed based on the IMNPs and the HRP-mAb probe, and the total assay time for the detection of Klebsiella pneumoniae was ∼60 min. A rapid, sensitive method was developed for screening Klebsiella pneumoniae in clinical samples. The NPIS developed in this study can detect Klebsiella pneumoniae without the enrichment of bacteria and the extraction of the genome; therefore, it can be used as a primary screening method to compliment other methods in the detection of Klebsiella pneumoniae.
Publication
Journal: Drug Metabolism Reviews
August/16/2017
Abstract
Cytochrome P450 2D6 (CYP2D6) is a polymorphic enzyme responsible for metabolizing approximately 25% of all drugs. CYP2D6 is highly expressed in the brain and plays a role as the major CYP in the metabolism of numerous brain-penetrant drugs, including antipsychotics and antidepressants. CYP2D6 activity and inhibition have been associated with numerous undesirable effects in patients, such as bioactivation, drug-associated suicidality and prolongation of the QTc interval. Several in silico tools have been developed in recent years to assist safety assessment scientists in predicting the structural identity of CYP2D6-derived metabolites. The first goal of this study was to perform a comparative evaluation on the ability of four commonly used in silico tools (MetaSite, StarDrop, SMARTCyp and RS-WebPredictor) to correctly predict the CYP2D6-derived site of metabolism (SOM) for 141 compounds, including 10 derived from the Genentech small molecule library. The second goal was to evaluate if a bioactivation prediction model, based on an indicator of chemical reactivity (ELUMO-EHOMO) and electrostatic potential, could correctly predict five representative compounds known to be bioactivated by CYP2D6. Such a model would be of great utility in safety assessment since unforeseen toxicities of CYP2D6 substrates may in part be due to bioactivation mechanisms. The third and final goal was to investigate whether molecular docking, using the crystal structure of human CYP2D6, had the potential to compliment or improve the results obtained from the four SOM in silico programs.
Publication
Journal: Renal Failure
December/10/2003
Abstract
BACKGROUND
Intradialytic symptoms including hypotension have been reported during dialysis and it has been suggested that these are related to the release of cytokines like IL-1beta and TNFalpha by blood mononuclear cells when they get activated either due to contact with the dialyzer membrane or by compliment activation.
OBJECTIVE
To study the relationship between hemodialysis symptoms, cytokine production, and dialyzer membrane composition.
METHODS
In a randomized prospective crossover study, 20 ESRD patients on maintenance hemodialysis were studied over cuprophan (CU) and polysulfone (PS) low flux dialyzer membranes for three weeks each undergoing a biweekly dialysis schedule of 4 h sessions. Serial IL-1beta and TNFalpha levels were measured over 0, 15, 240 min during the first use of the dialyzer for all patients on both membranes. Intradialytic symptoms were monitored in a total of 240 dialysis sessions.
RESULTS
IL-1beta levels increased from 16.6 +/- 2.2 to 64.8 +/- 25.1 pg/mL on CU and 21.5 +/- 3.7 to 103.5 +/- 30.7 pg/mL on PS membrane over the 4-h dialysis session. Similarly TNFalpha increased from 42.8 +/- 4.5 to 354.9 +/- 80.4 pg/mL on CU and 117.1+/- 53.7 to 387.0 +/- 78.0 pg/mL on PS membrane. IL-1beta levels increased significantly with PS membrane while TNFalpha rise was significant with both the membranes. Nausea was the most common symptom occurring in 138 dialysis sessions (57.5%). Vomiting, chest pain, fever, chills, and breathlessness occurred significantly more during dialysis with CU membrane as compared with PS membrane (P < 0.01). Nausea, cramps, back pain, itching, restlessness, post dialysis fatigue, and hypotension did not differ between the two membranes. The mean rise in the cytokine levels during the first 15 min of sessions where the symptoms occurred, when compared with the mean rise in sessions where the symptoms did not occur, did not reveal any significant difference. Cytokine release did not correlate with the occurrence of intradialytic symptoms.
CONCLUSIONS
Both CU and PS membranes increase circulating cytokine levels. More intradialytic clinical symptoms are seen in dialysis with CU as compared with PS membrane but the rise in cytokines IL-1beta and TNFalpha does not appear to be responsible for them.
Publication
Journal: Brain and Development
September/7/1999
Abstract
In a cross-sectional study of 24 Oriental children with systemic lupus erythematosus (SLE) with a mean age of 11.25 years, 75% were found to have clinical and neurophysiological evidence of cerebral lupus. Seizures were the most common manifestation affecting 11 (61%) of the cases, followed by psychosis in five (27.7%), encephalopathy in five (27.7%), headaches in five (27.7%), personality changes in four (22.2%), stroke in three (16.6%), movement disorders in three (16.6%) and myelitis in one child (5.5%). Four children had cerebral lupus as the presenting manifestation of SLE. Twenty-one children had an electroencephalogram (EEG) of which 11 were normal. Abnormalities detected in the rest included focal sharps, slowing of background and electrodecremental changes. There was a poor correlation of EEG with the clinical presentation. Sixteen children with cerebral lupus had a computed tomogram (CT) of which three were normal. The commonest abnormality was cerebral atrophy with or without infarcts. Only four of the cases had lupus anticoagulant but compliment was reduced in 13. Sixteen of the cases also had renal involvement. Treatment was generally with steroids with only two patients receiving cyclophosphamide for cerebral relapse. Eight children (44%) made a full recovery. Learning disability was the most frequent sequelae affecting one-third of children seen at a 1-year follow up. Four (22%) had epilepsy, two (11%) had motor deficits and one child had optic atrophy. One child died of cerebral haemorrhage during a hypertensive crisis.
Publication
Journal: Science of the Total Environment
June/20/2005
Abstract
PCNs were measured in air and snow during separate field campaigns at Ny-Alesund (April 2001) and Tromsø (February/March 2003) in the Norwegian Arctic. Air concentrations ranged from 27 to 48 and 9 to 47 pg sigmaPCN m(-3) for Ny-Alesund (n=6) and Tromsø (n=10), respectively. These concentrations (including the tri-chlorinated naphthalenes) greatly exceeded concentrations previously measured in the Canadian Arctic, but did fall within the upper range of concentrations observed over the eastern Arctic Ocean and regional seas. Local sources appear to be affecting concentrations observed at both sites, with the presence of several hexa-chlorinated naphthalenes at Tromsø probably attributed to local/regional sources. Use of air mass back trajectories at Tromsø revealed that background air concentrations in the Norwegian Arctic are likely to range between <9 and 20 pg sigmaPCN m(-3) and that contemporary concentrations derived close to potential sources (i.e. arctic towns) may equal or exceed those of PCBs. The mean concentration in surface snow was 350 and 240 pg sigmaPCN L(-1) (meltwater) (or 0.014 and 0.01 pg g(-1) (snow)) at Ny-Alesund and Tromsø, respectively. The wide variation in concentrations observed between fresh snowfalls could be explained by different snow densities (as a surrogate of snow surface area), rather than attributed to varying air concentrations. A statistically significant inverse relationship was found between snow density and concentrations of tri- to penta-chlorinated homologues and compliments similar findings for the polychlorinated biphenyls (PCBs). This suggests that the vapour-sorbed quantity changes rapidly with snow ageing/compaction; with implications for the fate of these chemicals in the Arctic.
Publication
Journal: Supplements to Clinical neurophysiology
September/15/2010
Abstract
MUNE provides valuable information when applied to animal models of motor neuron disease. It is potentially useful as a supplement to therapeutic trials on the SOD-1 transgenic mouse model and has been able to show increases in the functioning motor units in response to some stem cell transplantation. Even in models that have subtle or imperceptible phenotypes, MUNE can show reductions in motor unit compliment. Thus, it is a valuable addition to the armamentarium of investigative tools when studying models of motor unit loss.
Publication
Journal: Veterinary Microbiology
April/6/2015
Abstract
In this study we characterise the genomic and transcriptomic variability of a natural deletion strain of Mycobacterium avium subspecies paratuberculosis (MAP) prevalent in Spanish Guadarrama goats. Using a pan-genome microarray including MAP and M. avium subspecies hominissuis 104 genomes (MAPAC) we demonstrate the genotype to be MAP Type II with a single deletion of 19 contiguous ORFs (16 kb) including a complete mammalian cell entry (mce7_1) operon and adjacent proline-glutamic acid (PE)/proline-proline-glutamic acid (PPE) genes. A deletion specific PCR test was developed and a subsequent screening identified four goat herds infected with the variant strain. Each was located in central Spain and showed epidemiological links suggestive of transmission between herds. A majority of animals infected with the variant manifested a paucibacillary form of the disease. Comparisons between virulent complete genome compliment strains isolated from multibacillary diseased goats and the MAP variant strain during entry into activated macrophages demonstrated an increased sensitivity in the variant to intracellular killing in human and ovine macrophages. As PPE and mce genes are associated with mycobacterial virulence and pathogenesis we investigated the interplay of these gene sets during cell entry using the MAPAC array. This showed significant differential transcriptome profiles compared to full genome complement MAP controls that included changes in other undeleted mce operons and PE/PPE genes, esx-like signalling operons and stress response/fatty acid metabolism pathways. This strain represents the first report of a MAP Type II genotype with significant natural genomic deletions which remains able to cause disease and is transmissible in goats.
Publication
Journal: Journal of Women's Health
March/19/2012
Abstract
BACKGROUND
The practice of female genital cutting (FGC) is widespread in Nigeria and varies from one ethnic group to another. In 1994, Nigeria joined members of the 47th World Health Assembly in a resolution to eliminate the practice, and since then, several steps has been taken to achieve this objective.
METHODS
Nigeria joined members of the 47th World Health Assembly sixteen years ago in a resolution to eliminate female genital mutilation. This study uses data from 420 women aged 15?49 years who had at least one surviving daughter to investigate changes in FGC prevalence among mothers and daughters. The sample was systematically selected through stratified random sampling across the six states of southwest Nigeria. Focus group discussion, and an in-depth interview with fourteen women considered to be specialist in FGC were also held to compliment data generated from the interview.
RESULTS
The analysis indicated an FGC prevalence rate of 75% and 71% for mothers and daughters, respectively. It further indicated that the practice is rooted in tradition despite the fact that 52% of the respondents are aware of the health hazards of FGC. Educated mothers were found to be less likely to favor the cutting of their daughters.
CONCLUSIONS
It is suggested that educational campaigns aimed toward parents should be intensified. Legal recourse, prohibition of operations, improvement in women's status, and sex education are also suggested as means of eradicating the practice.
Publication
Journal: Journal of Craniofacial Surgery
September/22/2015
Abstract
Two consecutive cleft missions were conducted in Guwahati, northeastern India in December 2010 and January 2011. In the later mission, a standardized patient education program for postoperative care was introduced. The objective of this study was to retrospectively evaluate the impact of the patient education program on cleft lip complications in terms of wound infection and dehiscence. Two hundred ninety-eight cleft lip repairs were performed in the first mission and 220 (74%) returned for early follow-up. In the second mission, 356 patients were operated on and 252 (71%) returned for follow-up. From the first mission, 8 patients (3.7%) were diagnosed with lip wound infection and 21 patients (9.6%) with lip dehiscence. After the second mission, only 1 patient (0.4%) returned with a wound infection and 16 (6.4%) were diagnosed with dehiscence.Using binary logistic regression including age, cleft type, postoperative antibiotics, surgeon, and patient education program as covariates, the patient education program stood out as the only variable with a statistically significant impact on the incidence of postoperative wound infections. Even though the incidence of lip dehiscence was reduced by one third when the patient education program was utilized, our regression model singled out the surgeons as the only factor significantly related to this type of complication. Moreover, no benefits of postoperative antibiotic prophylaxis were found. Further analysis of the data also implied that the use of tissue adhesive as a compliment to sutures does not reduce the risk of dehiscence.
Publication
Journal: Cochrane Database of Systematic Reviews
September/18/2017
Abstract
Neonatal hyperbilirubinaemia is a common problem which carries a risk of neurotoxicity. Certain infants who have hyperbilirubinaemia develop bilirubin encephalopathy and kernicterus which may lead to long-term disability. Phototherapy is currently the mainstay of treatment for neonatal hyperbilirubinaemia. Among the adjunctive measures to compliment the effects of phototherapy, fluid supplementation has been proposed to reduce serum bilirubin levels. The mechanism of action proposed includes direct dilutional effects of intravenous (IV) fluids, or enhancement of peristalsis to reduce enterohepatic circulation by oral fluid supplementation.
To assess the risks and benefits of fluid supplementation compared to standard fluid management in term and preterm newborn infants with unconjugated hyperbilirubinaemia who require phototherapy.
We used the standard search strategy of Cochrane Neonatal to search the Cochrane Central Register of Controlled Trials (CENTRAL; 2017, Issue 5), MEDLINE via PubMed (1966 to 7 June 2017), Embase (1980 to 7 June 2017), and CINAHL (1982 to 7 June 2017). We also searched clinical trials databases, conference proceedings, and the reference lists of retrieved articles for randomised controlled trials and quasi-randomised trials.
We included randomised controlled trials that compared fluid supplementation against no fluid supplementation, or one form of fluid supplementation against another.
We extracted data using the standard methods of the Cochrane Neonatal Review Group using the Covidence platform. Two review authors independently assessed the eligibility and risk of bias of the retrieved records. We expressed our results using mean difference (MD), risk difference (RD), and risk ratio (RR) with 95% confidence intervals (CIs).
Out of 1449 articles screened, seven studies were included. Three articles were awaiting classification, among them, two completed trials identified from the trial registry appeared to be unpublished so far.There were two major comparisons: IV fluid supplementation versus no fluid supplementation (six studies) and IV fluid supplementation versus oral fluid supplementation (one study). A total of 494 term, healthy newborn infants with unconjugated hyperbilirubinaemia were evaluated. All studies were at high risk of bias for blinding of care personnel, five studies had unclear risk of bias for blinding of outcome assessors, and most studies had unclear risk of bias in allocation concealment. There was low- to moderate-quality evidence for all major outcomes.In the comparison between IV fluid supplementation and no supplementation, no infant in either group developed bilirubin encephalopathy in the one study that reported this outcome. Serum bilirubin was lower at four hours postintervention for infants who received IV fluid supplementation (MD -34.00 μmol/L (-1.99 mg/dL), 95% CI -52.29 (3.06) to -15.71 (0.92); participants = 67, study = 1) (low quality of evidence, downgraded one level for indirectness and one level for suspected publication bias). Beyond eight hours postintervention, serum bilirubin was similar between the two groups. Duration of phototherapy was significantly shorter for fluid-supplemented infants, but the estimate was affected by heterogeneity which was not clearly explained (MD -10.70 hours, 95% CI -15.55 to -5.85; participants = 218; studies = 3; I² = 67%). Fluid-supplemented infants were less likely to require exchange transfusion (RR 0.39, 95% CI 0.21 to 0.71; RD -0.01, 95% CI -0.04 to 0.02; participants = 462; studies = 6; I² = 72%) (low quality of evidence, downgraded one level due to inconsistency, and another level due to suspected publication bias), and the estimate was similarly affected by unexplained heterogeneity. The frequencies of breastfeeding were similar between the fluid-supplemented and non-supplemented infants in days one to three based on one study (estimate on day three: MD 0.90 feeds, 95% CI -0.40 to 2.20; participants = 60) (moderate quality of evidence, downgraded one level for imprecision).One study contributed to all outcome data in the comparison of IV versus oral fluid supplementation. In this comparison, no infant in either group developed abnormal neurological signs. Serum bilirubin, as well as the rate of change of serum bilirubin, were similar between the two groups at four hours after phototherapy (serum bilirubin: MD 11.00 μmol/L (0.64 mg/dL), 95% CI -21.58 (-1.26) to 43.58 (2.55); rate of change of serum bilirubin: MD 0.80 μmol/L/hour (0.05 mg/dL/hour), 95% CI -2.55 (-0.15) to 4.15 (0.24); participants = 54 in both outcomes) (moderate quality of evidence for both outcomes, downgraded one level for indirectness). The number of infants who required exchange transfusion was similar between the two groups (RR 1.60, 95% CI 0.60 to 4.27; RD 0.11, 95% CI -0.12 to 0.34; participants = 54). No infant in either group developed adverse effects including vomiting or abdominal distension.
There is no evidence that IV fluid supplementation affects important clinical outcomes such as bilirubin encephalopathy, kernicterus, or cerebral palsy in healthy, term newborn infants with unconjugated hyperbilirubinaemia requiring phototherapy. In this review, no infant developed these bilirubin-associated clinical complications. Low- to moderate-quality evidence shows that there are differences in total serum bilirubin levels between fluid-supplemented and control groups at some time points but not at others, the clinical significance of which is uncertain. There is no evidence of a difference between the effectiveness of IV and oral fluid supplementations in reducing serum bilirubin. Similarly, no infant developed adverse events or complications from fluid supplementation such as vomiting or abdominal distension. This suggests a need for future research to focus on different population groups with possibly higher baseline risks of bilirubin-related neurological complications, such as preterm or low birthweight infants, infants with haemolytic hyperbilirubinaemia, as well as infants with dehydration for comparison of different fluid supplementation regimen.
Publication
Journal: BMC Infectious Diseases
July/5/2017
Abstract
Brucellosis is one of the major zoonoses globally with great veterinary and public health importance, particularly in developing countries where people are having frequent contact with livestock and animal products. This cross sectional study was carried out from November 2013 to May 2014 to determine the seroprevalence and assess the potential risk factors of brucellosis in abattoir workers of five export abattoirs at Debre Ziet and Modjo, Central Ethiopia.
Serology and structured questionnaire were the methods used. In this study, 156 abattoir workers participated in the questionnaire survey and among them, 149 agreed for blood sample collection. Rose Bengal Plate Test and Complement Fixation Test were conducted using sera samples at serology laboratory of the National Animal Health Diagnostic and Investigation Center. Data collection sheets were used to gather information on possible risk factors believed to influence the spread of Brucella infection in abattoir workers such as sex, age, marital status, duration on job, types of work, educational level, etc. and further information obtained include knowledge of brucellosis and other zoonotic diseases infection, symptoms of the disease, milk and meat consumption habits and work related risk factors. Chi-square and Fisher's exact tests were used for data analysis.
The overall seroprevalence of brucellosis in abattoir workers was found to be 4.7 and 1.3% using Rose Bengal plate test and Compliment fixation test, respectively. Based on the questionnaire survey, 66 (44.2%) and 85 (53.21%) of abattoir workers were aware of brucellosis and other zoonotic diseases, and 29 (18.6%) and 21 (13.5%) were using gloves and cover their mouth while slaughtering, respectively.
Brucellosis in abattoir workers could be prevented by using protective closing and measures. Concerned body should educate occupationally exposed groups and the general public regarding e prevention and control of brucellosis and other zoonotic diseases.
Publication
Journal: Pan African Medical Journal
March/7/2013
Abstract
Epizootiology is the study of variable factors, events, forces and circumstances that contribute to the occurrence, distribution, control and prevention of ill-health, diseases and other problems in animal groups. It is a key component of veterinary medicine education at the University of Ibadan, Nigeria since 1975. It started as a Graduate Certificate in Epizootiology (GCE) in 1976. Later it was revised into M.Sc. Epizootiology in 1986. At graduate level, epizootiology curriculum has supported the M.Sc. Epizootiology programme. It compliments training in Veterinary Public Health and Preventive Medicine. This epizootiology curriculum has been operational at graduate level for more than three decades. Now in 2011, a consortium of English speaking West African Universities is committed to review the current curriculum at the University of Ibadan to strengthen health systems in an interdependent world with scope for internationalized practicum in disease investigation. Emphases are made towards skills development in molecular studies on disease causal agents and the mapping of associated geographic risk factors, including indigenous knowledge and practices. It is notable that most English-speaking West African countries including Ghana, Liberia, Sierra Leone and Gambia either lack a Veterinary School or just started some, but do not have graduate programme in Epizootiology. Thus, the curriculum at Ibadan is positioned to make impact in three key areas, namely, sub-regional ecosystem health studies, improving human-animal disease surveillance programmes, and in indigenization of bio-technology for monitoring and evaluation of trans-boundary animal disease control interventions for global health in West Africa.
Publication
Journal: Health Psychology Open
February/19/2017
Abstract
A participatory action approach with potential users and clinical experts was employed to design and evaluate the acceptability of young person's Face IT (YP Face IT), an online intervention incorporating cognitive behavioural therapy and social skills training for adolescents with appearance-related anxiety as a result of a visible difference. Workshops with adolescents and clinicians informed a prototype YP Face IT which underwent a usability analysis by 28 multidisciplinary health professionals and 18 adolescents, before 10 adolescents completed it at home. Acceptability data obtained online and via interview were analysed using content analysis. Participants found YP Face IT acceptable and believed it would provide much needed and easy access to psychosocial support. They requested that it should be made widely available either as a self-management tool requiring minimal supervision from a health professional or to compliment therapist-led care.
Publication
Journal: Journal of Burn Care and Research
December/21/2016
Abstract
Burn injuries have a major influence on the survivors' physical and psychological functioning. In pediatric burns, the consequences persist long after the injury. The objective of this study is to evaluate an existing yoga kids program to gain better understanding of the physical and psychosocial effects of a yoga practice among children with burn injuries. Thirty campers participated in a series of four (1 hour) yoga sessions during the summer of 2014. Nationally trained Instructors had taught children's yoga in the Southwestern United States for at least 10 years. A Yoga Evaluation Questionnaire, designed for children, was used to evaluate perceptions of somatic and cognitive anxiety before and after each Yoga session. Camper's age ranged from 6 to 12 years old with burn severities ranging from 5 to 75%. A dependent samples t-test was used to test for differences between composite pre- and postintervention scores for both somatic and cognitive anxiety. Significant effects emerged for somatic anxiety t(29) = -4.24, P < .001, d = 0.77, and cognitive anxiety t(29) = -4.188, P < .001, d = 0.76. For both cognitive and somatic anxiety, the postintervention composite mean scores were significantly higher, indicating a decrease in somatic and cognitive anxiety. This study suggests that participation in a Yoga program may lower perceptions of cognitive and somatic anxiety in pediatric burn survivors. Further, Yoga is one technique that may compliment the short- and long-term treatment of burn injuries.
Publication
Journal: Reviews in the Neurosciences
October/30/2018
Abstract
Rodent and rabbit stroke models have been instrumental in our current understanding of stroke pathophysiology; however, translational failure is a significant problem in preclinical ischemic stroke research today. There are a number of different focal cerebral ischemia models that vary in their utility, pathophysiology of causing disease, and their response to treatments. Unfortunately, despite active preclinical research using these models, treatment options for ischemic stroke have not significantly advanced since the food and drug administration approval of tissue plasminogen activator in 1996. This review aims to summarize current stroke therapies, the preclinical experimental models used to help develop stroke therapies, as well as their advantages and limitations. In addition, this review discusses the potential for naturally occurring canine ischemic stroke models to compliment current preclinical models and to help bridge the translational gap between small mammal models and human clinical trials.
Publication
Journal: Cellular and Molecular Life Sciences
April/25/2020
Abstract
Circulating tumor cells (CTCs) are regarded as harbingers of metastases. Their ability to predict response to therapy, relapse, and resistance to treatment has proposed their value as putative diagnostic and prognostic indicators. CTCs represent one of the zeniths of cancer evolution in terms of cell survival; however, the triggers of CTC generation, the identification of potentially metastatic CTCs, and the mechanisms contributing to their heterogeneity and aggressiveness represent issues not yet fully deciphered. Thus, prior to enabling liquid biopsy applications to reach clinical prime time, understanding how the above mechanistic information can be applied to improve treatment decisions is a key challenge. Here, we provide our perspective on how CTCs can provide mechanistic insights into tumor pathogenesis, as well as on CTC clinical value. In doing so, we aim to (a) describe how CTCs disseminate from the primary tumor, and their link to epithelial-mesenchymal transition (EMT); (b) trace the route of CTCs through the circulation, focusing on tumor self-seeding and the possibility of tertiary metastasis; (c) describe possible mechanisms underlying the enhanced metastatic potential of CTCs; (d) discuss how CTC could provide further information on the tissue of origin, especially in cancer of unknown primary origin. We also provide a comprehensive review of meta-analyses assessing the prognostic significance of CTCs, to highlight the emerging role of CTCs in clinical oncology. We also explore how cell-free circulating tumor DNA (ctDNA) analysis, using a combination of genomic and phylogenetic analysis, can offer insights into CTC biology, including our understanding of CTC heterogeneity and tumor evolution. Last, we discuss emerging technologies, such as high-throughput quantitative imaging, radiogenomics, machine learning approaches, and the emerging breath biopsy. These technologies could compliment CTC and ctDNA analyses, and they collectively represent major future steps in cancer detection, monitoring, and management.
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