Dependence of TIMP-1 plasma levels on preanalytical specimen handling

Background: Tissue inhibitor of metalloproteinases-1 (TIMP-1) in blood might be a helpful biomarker in various diseases. However, various authors report that TIMP-1 is dependent on preanalytical procedures. Our study was performed to determine how storage conditions and time to centrifugation influence TIMP-1. Materials and Methods: Twenty-six blood specimens were collected from each of 20 volunteers. Two specimens from each person were centrifuged/measured within 1 h after venipuncture and frozen at -80 degrees C. They were thawed once or twice within 72 h. Eight specimens were stored at 20 degrees C in daylight, 8 at 20 degrees C covered and 8 at 4 C in daylight. Four of each of these 8 specimens were mixed once a day until centrifugation. A mixed and an unmixed specimen of each group was centrifuged/measured after 3, 6, 24 and 72 h. Results: TIMP-1 increased after freeze/ thaw (p < 0.001). Mixing blood specimens more than once caused increased TIMP-1 (p < 0.001). TIMP-1 increased within 3 h of storage (p < 0.001). The increase was lower in specimens covered and refrigerated (p < 0.001). Conclusion: TIMP-1 is unstable and has to be evaluated carefully. Blood should be centrifuged directly after venipuncture. For routine application, specimen handling must be standardized and carefully followed. Research should be done on specimens handled identically. Copyright (C) 2008 S. Karger AG, Basel

The rise and fall of heroin use in an inner city area of Dublin.

This study examined the extent of heroin use in a Dublin south inner-city electoral ward, during the period 1979 to 1985. There were 82 completed questionnaires out of a possible total of 103, giving a response rate of 80%. Each of the 82 respondents had a fixed address in the area during the period, and all of them had a history of heroin use, which was validated through medical records. The extent of heroin use in the area was greatest in the 1977/81 period, and the researchers found that it was particularly marked in the under-25 age groups, especially among males aged 15 to 19 years. However, the authors found that, since 1981, there had been a marked decline in heroin use in the area

Methylphenidate and Atomoxetine Enhance Sensory-Evoked Neuronal Activity in the Visual Thalamus of Male Rats

Attention deficits and inappropriate regulation of sensory signal processing are hallmarks of many neuropsychiatric conditions, including attention deficit hyperactivity disorder (ADHD), for which methylphenidate (MPH) and atomoxetine (ATX) are commonly prescribed therapeutic treatments. Despite their widespread use and known mechanism of blocking reuptake of catecholamine transmitters in the brain, the resultant actions on individual neuron and neural circuit function that lead to therapeutic efficacy are poorly understood. Given the ability of MPH and ATX to improve cognitive performance in humans and rodent assays of attention, we were interested in their influence on early sensory processing in the dorsal lateral geniculate nucleus (dLGN), the primary thalamic relay for visual information from the retina to the visual cortex. In male rats, dLGN neuronal responses to light stimuli were altered in multiple ways following doses of MPH or ATX observed to enhance performance in visually-guided assays of attention in rats (MPH, 2 mg/kg; ATX, 0.5 mg/kg). Latencies to response onset and to the peak of the primary response were decreased, while the peak intensity and area of the primary response were increased. In addition, some cells that were unresponsive to light stimuli prior to drug treatment displayed a ‘gating effect,’ wherein prominent responses to light stimuli were evident following drug administration. Our results begin to reveal unique effects of MPH and ATX in enhancing sensory signal transmission through visual circuitry, and may yield new insights for understanding the pathophysiology of certain cognitive disorders and inform development of improved therapeutic treatments for these conditions

Relationship of pre-competition arousal assessments to self-perceived performance competencies in collegiate wrestlers

The purpose of this study was to examine the relationship of pre-competition arousal assessments to self-perceived performance competencies in collegiate wrestlers. This author employed the technique of self-reporting in order to examine this relationship. The research design selected was a number of replications of a single subject case study. A modified version of Rushall's (1977) Pre-Competition Psychological Checklist allowed each subject to report his pre-match arousal symptoms, his pre-match arousal (excitedness) level, his estimation of winning, and the post-match assessment of his performance for each match. The data were analyzed to determine, 1) the existence of arousal patterns that were performance-grade specific on a five category scale, 2) the arousal estimate and performance level relationship, 3) the relationship between estimation of winning and performance, 4) the arousal estimate and estimation of winning relationship, and 5) the interaction between arousal, estimate of winning and performance level. All subjects exhibited performance-grade specific arousal patterns. The highest calibre wrestlers illustrated increasedsensitivity of pattern indicators and performance discriminators. This subgroup also evidenced the highest increases as well as the highest absolute values in arousal level. When all wrestlers were considered together the relationship between arousal and performance was positive and linear thereby supporting the Drive theory. This information suggested that the highest calibre wrestler also experienced the greatest control of arousal levels and symptoms

Removing Barriers, Integrating Research, Spreading Excellence: The European Satellite Communications Network of Excellence "SatNEx"

Within the recently launched 6th Research Framework Programme of the European Commission, 21 major players in satellite communications research have joined forces to implement the European Satellite Communications Network of Excellence (SatNEx). The primary goal of SatNEx is to achieve long-lasting integration of the European research in satellite communication and to develop a common base of knowledge, thus contributing to the realization of the European Research Area. This paper discusses the background and motivation for implementation of the network and highlights the SatNEx mission and key objectives. A top-level overview is then provided including a description of the consortium, the Joint Programme of Activities (JPA) and the time schedule with deliverables and milestones. Finally, an update of ongoing work is presented

The relationship between tooth size discrepancy and archform classification in orthodontic patients

Background: To determine the relationship between clinically significant tooth size discrepancies (TSD) and archform classification in orthodontic patients. Material and Methods: Two hundred and forty consecutive sets of pre-treatment orthodontic study models were scanned and landmarked. All models had permanent teeth erupted from first molar to first molar in both arches. Sixty sets of images were classified into two groups of 30 according to the presence (group 1) or absence (group 2) of a clinically significant overall or anterior TSD (>2 SD from Bolton’s original means). Mean upper and lower archforms were created for each group using a fourth degree polynomial curve. Upper and lower archforms in each group were classified as square, tapering or ovoid; their distribution was analysed using the Fisher test with a 5% level of significance. To evaluate the intra-operator error when determining archform type, the 60 archforms were re-classified by the same operator two weeks later. The unweighted Kappa statistic at 95% confidence intervals was used to determine the similarity of the classification on the two occasions. Results: Reproducibility of the classification of archform was very good (unweighted Kappa statistic of 0.83 with a 95% confidence interval of 0.73, 0.93). There was no statistically significant difference in the distribution of archform type between group 1 and group 2 for the upper ( p =0.3305) or lower ( p =0.6310) arches. Conclusions: The presence of a clinically significant TSD and archform classification do not appear to be related

The Relationship Between Tooth Size Discrepancy and Archform Classification in Orthodontic Patients

Background To determine the relationship between clinically significant tooth size discrepancies (TSD) and archform classification in orthodontic patients. Material and Methods Eighty teeth with artificial white spot lesions were randomly divided into four groups: (A) distilled and deionized water, (B) Nd:YAG laser, (C) CPP-ACP crème, & (D) CPP-ACP plus laser. SMH was measured using Vickers diamond indenter in Vickers Hardness Number (VHN). Two samples of each group were analyzed using scanning electron microscope (SEM). The results were analyzed with the SPSS 17/win. Results Reproducibility of the classification of archform was very good (unweighted Kappa statistic of 0.83 with a 95% confidence interval of 0.73, 0.93). There was no statistically significant difference in the distribution of archform type between group 1 and group 2 for the upper (p=0.3305) or lower (p=0.6310) arches. Conclusions The presence of a clinically significant TSD and archform classification do not appear to be related

Cost Impact Analysis of Using The Improve® Tool For Venous Thromboembolism Risk Assessment In Medical Patients Admitted to The UK NHS Hospitals to Inform NICE Clinical Guideline Recommendation

© 2018 The Author(s). This an open access work distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.Peer reviewedFinal Accepted Versio