130,685 research outputs found
ЭТИОЛОГИЯ, ПАТОГЕНЕЗ И МОРФОЛОГИЯ ЭФФЕКТА QUILTY
No full textDespite the fact that the study of endocardial infi ltrates (Quilty effect) in the transplanted heart has been going on for more than 30 years, the etiology, morphology and clinical signifi cance of this phenomenon are not yet fully understood. The article presents the facts of the available literature on the possible causes and mechanisms of the effect of Quilty, as well as on its impact on the function of the transplanted heartНесмотря на то что изучение эндокардиальных инфильтратов (Quilty effect) в трансплантированном сердце продолжается уже более 30 лет, этиология, морфология и клиническое значение этого феномена остаются до конца не выясненными. В статье приведены данные доступной литературы о возможных причинах и механизмах развития эффекта Quilty, а также о его влиянии на функцию трансплантированного сердца
СВЯЗЬ ЭФФЕКТА QUILTY С ОСТРЫМ ОТТОРЖЕНИЕМ ТРАНСПЛАНТИРОВАННОГО СЕРДЦА
No full textIntroduction. The Quilty Effect (lymphoid-cellular infiltration of the endocardium) is a frequent finding in biopsies of the transplanted heart. The role of this phenomenon in the rejection of the transplanted heart remains unclear. Aim. Retrospective analysis of endomyocardial biopsies of the transplanted heart and assessment of the relationship between acute cellular rejection and Quilty Effect. Methods and results. 112 endomyocardial biopsies with Quilty Effect were identified out of 883 studied biopsies during the period from January 2010 to June 2014. The frequency of Quilty damage occurrence in acute cellular rejection is significantly higher than in its absence (17.7% and 5.6%; р < 0.001). The combination of acute cellular rejection with acute antibodymediated rejection significantly increases the frequency of Quilty damage (р = 0.039). Isolated acute antibodymediated rejection of the transplanted heart does not affect the frequency of Quilty Effect occurrence and is not a direct etiologic and pathogenetic factor of this phenomenon. In the absence of acute cellular rejection, Quilty Effect is a predictor of its later development. Mild acute cellular rejection in conjunction with the Quilty Effect causes the risk of more severe degree of rejection. Quilty Effect type B occurs much less frequently than type A (1.9% and 10.8%; р = 0.001) and is observed primarily in acute cellular rejection of grade G2R (р = 0.001); the frequency of these morphological types at various periods after heart transplant was not significantly different (р > 0.05). Conclusion. The Quilty Effect is a kind of manifestation of acute cellular rejection of the transplanted heart when immunosuppressive therapy with calcineurin inhibitors is used. Введение. Эффект Quilty (лимфоидно-клеточная инфильтрация эндокарда) является нередкой находкой в биоптатах трансплантированного сердца. Остается неясным, какую роль играет этот феномен в отторжении трансплантированного сердца. Цель. Ретроспективный анализ эндомиокардиальных биоптатов трансплантированного сердца и оценка взаимосвязи острого клеточного отторжения с эффектом Quilty. Методы и результаты. В период с января 2010 г. по июнь 2014 г. было выявлено 112 эндомиокардиальных биоптатов с эффектом Quiltу из 883 изученных биоптатов. Установлено, что частота возникновения Quilty-повреждения при остром клеточном отторжении значительно выше, чем при его отсутствии (соответственно 17,7 и 5,6%; р < 0,001). Сочетание острого клеточного с острым антителоопосредованным отторжением существенно увеличивает частоту Quilty повреждения (р = 0,039). Изолированное острое антителоопосредованное отторжение трансплантированного сердца не влияет на частоту появления эффекта Quilty и не является непосредственным этиологическим и патогенетическим фактором этого феномена. При отсутствии острого клеточного отторжения эффект Quilty является предиктором его более позднего развития. При легкой степени острого клеточного отторжения в сочетании с эффектом Quilty существует риск более тяжелой степени отторжения. Эффект Quilty типа В встречается существенно реже типа А (1,9 и 10,8%; р = 0,001) и наблюдается преимущественно при остром клеточном отторжении степени G2R (р = 0,001); частота этих морфологических типов в различные сроки после трансплантации сердца значимо не отличается (р > 0,05). Заключение. Эффект Quilty является своеобразным проявлением острого клеточного отторжения трансплантированного сердца при иммуносупрессивной терапии ингибиторами кальциневрина.
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The XVth Banff Conference on Allograft Pathology the Banff Workshop Heart Report: Improving the diagnostic yield from endomyocardial biopsies and Quilty effect revisited
No full textThe XVth Banff Conference on Allograft Pathology meeting was held on September 23-27, 2019, in Pittsburgh, Pennsylvania, USA. During this meeting, two main topics in cardiac transplant pathology were addressed: (a) Improvement of endomyocardial biopsy (EMB) accuracy for the diagnosis of rejection and other significant injury patterns, and (b) the orphaned lesion known as Quilty effect or nodular endocardial infiltrates. Molecular technologies have evolved in recent years, deciphering pathophysiology of cardiac rejection. Diagnostically, it is time to integrate the histopathology of EMBs and molecular data. The goal is to incorporate molecular pathology, performed on the same paraffin block as a companion test for histopathology, to yield more accurate and objective EMB interpretation. Application of digital image analysis from hematoxylin and eosin (H&E) stain to multiplex labeling is another means of extracting additional information from EMBs. New concepts have emerged exploring the multifaceted significance of myocardial injury, minimal rejection patterns supported by molecular profiles, and lesions of arteriolitis/vasculitis in the setting of T cell–mediated rejection (TCMR) and antibody-mediated rejection (AMR). The orphaned lesion known as Quilty effect or nodular endocardial infiltrates. A state-of-the-art session with historical aspects and current dilemmas was reviewed, and possible pathogenesis proposed, based on advances in immunology to explain conflicting data. The Quilty effect will be the subject of a multicenter project to explore whether it functions as a tertiary lymphoid organ
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Scholarly Communication and Publishing Lunch and Learn Talk #11: The ULS Open Access Author Fee Fund
No full textAt the May 2014 talk, you will learn about the ULS Open Access Author Fee Fund--what it is, why we do it, how it works, and how the program is going so far
(Table 4) Distribution of benthic foraminifera in ODP Site 120-750
No full textX = present, D = dominant, - = absent, numbers indicate percentage
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