bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vasohibin-2 Aggravates Development of Ascending Aortic Aneurysms but not Abdominal Aortic Aneurysms nor Atherosclerosis in ApoE-Deficient Mice
Authors: Otaka Nozomu , Uchida Haruhito A , Okuyama Michihiro , Hada Yoshiko , Onishi Yasuhiro , Kakio Yuki , Takeuchi Hidemi , Umebayashi Ryoko , Tanabe Katsuyuki , Subramanian Venkateswaran , Daugherty Alan , Sato Yasufumi , Wada Jun 
Published: November 2020

Abstract

BACKGROUND
Vasohibin-2 (VASH2) has been isolated as a homologue of vasohibin-1 (VASH1) that promotes angiogenesis counteracting with VASH1. Chronic angiotensin II (AngII) infusion promotes both ascending and abdominal aortic aneurysms (AAs) in mice. The present study aimed to investigate whether exogenous VASH2 influenced AngII-induced vascular pathology in apolipoprotein E-deficient (ApoE−/−) mice.

METHODS
Male, ApoE−/− mice (9–14 weeks old) were injected with Ad LacZ or Ad VASH2. After a week, saline or AngII (1,000 ng/kg/minute) was infused into the mice subcutaneously via mini-osmotic pumps for 3 weeks. Consequently, all these mice were divided into 4 groups: saline + LacZ (n = 5), saline + VASH2 (n = 5), AngII + LacZ (n = 18), and AngII + VASH2 (n = 17).

RESULTS
Exogenous VASH2 had no significant effect on ex vivo maximal diameters of abdominal aortas (AngII + LacZ: 1.67 ± 0.17 mm, AngII + VASH2: 1.52 ± 0.16 mm, n.s.) or elastin fragmentation and accumulation of inflammatory cells. Conversely, exogenous VASH2 significantly increased intima areas of aortic arches (AngII + LacZ: 16.6 ± 0.27 mm2, AngII + VASH2: 18.6 ± 0.64 mm2, P = 0.006). VASH2 effect of AngII-induced ascending AAs was associated with increased cleaved caspase-3 abundance. AngII-induced atherosclerosis was not altered by VASH2.

CONCLUSIONS
The present study demonstrated that augmented VASH2 expression had no effect of AngII-induced abdominal AAs or atherosclerosis, while increasing dilation in the ascending aorta.
Progress and challenge for computational quantification of tissue immune cells
Authors: Chen Ziyi , Wu Aiping 
Published: November 2020

AbstractTissue immune cells have long been recognized as important regulators for the maintenance of balance in the body system. Quantification of the abundance of different immune cells will provide enhanced understanding of the correlation between immune cells and normal or abnormal situations. Currently, computational methods to predict tissue immune cell compositions from bulk transcriptomes have been largely developed. Therefore, summarizing the advantages and disadvantages is appropriate. In addition, an examination of the challenges and possible solutions for these computational models will assist the development of this field. The common hypothesis of these models is that the expression of signature genes for immune cell types might represent the proportion of immune cells that contribute to the tissue transcriptome. In general, we grouped all reported tools into three groups, including reference-free, reference-based scoring and reference-based deconvolution methods. In this review, a summary of all the currently reported computational immune cell quantification tools and their applications, limitations, and perspectives are presented. Furthermore, some critical problems are found that have limited the performance and application of these models, including inadequate immune cell type, the collinearity problem, the impact of the tissue environment on the immune cell expression level, and the deficiency of standard datasets for model validation. To address these issues, tissue specific training datasets that include all known immune cells, a hierarchical computational framework, and benchmark datasets including both tissue expression profiles and the abundances of all the immune cells are proposed to further promote the development of this field.
On the complexity of haplotyping a microbial community
Authors: Nicholls Samuel M , Aubrey Wayne , De Grave Kurt , Schietgat Leander , Creevey Christopher J , Clare Amanda 
Published: November 2020

Abstract

Motivation
Population-level genetic variation enables competitiveness and niche specialization in microbial communities. Despite the difficulty in culturing many microbes from an environment, we can still study these communities by isolating and sequencing DNA directly from an environment (metagenomics). Recovering the genomic sequences of all isoforms of a given gene across all organisms in a metagenomic sample would aid evolutionary and ecological insights into microbial ecosystems with potential benefits for medicine and biotechnology. A significant obstacle to this goal arises from the lack of a computationally tractable solution that can recover these sequences from sequenced read fragments. This poses a problem analogous to reconstructing the two sequences that make up the genome of a diploid organism (i.e. haplotypes) but for an unknown number of individuals and haplotypes.

Results
The problem of single individual haplotyping was first formalized by Lancia et al. in 2001. Now, nearly two decades later, we discuss the complexity of ‘haplotyping’ metagenomic samples, with a new formalization of Lancia et al.’s data structure that allows us to effectively extend the single individual haplotype problem to microbial communities. This work describes and formalizes the problem of recovering genes (and other genomic subsequences) from all individuals within a complex community sample, which we term the metagenomic individual haplotyping problem. We also provide software implementations for a pairwise single nucleotide variant (SNV) co-occurrence matrix and greedy graph traversal algorithm.

Availability and implementation
Our reference implementation of the described pairwise SNV matrix (Hansel) and greedy haplotype path traversal algorithm (Gretel) is open source, MIT licensed and freely available online at github.com/samstudio8/hansel and github.com/samstudio8/gretel, respectively.
Comparison of subtyping methods for neuroimaging studies in Alzheimer’s disease: a call for harmonization
Authors: Mohanty Rosaleena , Mårtensson Gustav , Poulakis Konstantinos , Muehlboeck J-Sebastian , Rodriguez-Vieitez Elena , Chiotis Konstantinos , Grothe Michel J , Nordberg Agneta , Ferreira Daniel , Westman Eric ,   for the Alzheimer's Disease Neuroimaging Initiative
Published: November 2020

Abstract
Biological subtypes in Alzheimer’s disease, originally identified on neuropathological data, have been translated to in vivo biomarkers such as structural magnetic resonance imaging (sMRI) and positron emission tomography (PET), to disentangle the heterogeneity within Alzheimer’s disease. Although there is methodological variability across studies, comparable characteristics of subtypes are reported at the group level. In this study, we investigated whether group-level similarities translate to individual-level agreement across subtyping methods, in a head-to-head context. We compared five previously published subtyping methods. Firstly, we validated the subtyping methods in 89 amyloid-beta positive Alzheimer’s disease dementia patients (reference group: 70 amyloid-beta negative healthy individuals) using sMRI. Secondly, we extended and applied the subtyping methods to 53 amyloid-beta positive prodromal Alzheimer’s disease and 30 amyloid-beta positive Alzheimer’s disease dementia patients (reference group: 200 amyloid-beta negative healthy individuals) using sMRI and tau PET. Subtyping methods were implemented as outlined in each original study. Group-level and individual-level comparisons across methods were performed. Each individual subtyping method was replicated, and the proof-of-concept was established. At the group level, all methods captured subtypes with similar patterns of demographic and clinical characteristics, and with similar cortical thinning and tau PET uptake patterns. However, at the individual level large disagreements were found in subtype assignments. Although characteristics of subtypes are comparable at the group level, there is a large disagreement at the individual level across subtyping methods. Therefore, there is an urgent need for consensus and harmonization across subtyping methods. We call for establishment of an open benchmarking framework to overcome this problem.
Clinical Experience With Severe Acute Respiratory Syndrome Coronavirus 2–Related Illness in Children: Hospital Experience in Cape Town, South Africa
Authors: van der Zalm Marieke M , Lishman Juanita , Verhagen Lilly M , Redfern Andrew , Smit Liezl , Barday Mikhail , Ruttens Dries , da Costa A’ishah , van Jaarsveld Sandra , Itana Justina , Schrueder Neshaad , Van Schalkwyk Marije , Parker Noor , Appel Ilse , Fourie Barend , Claassen Mathilda , Workman Jessica J , Goussard Pierre , Van Zyl Gert , Rabie Helena 
Published: November 2020

Abstract

Background
Children seem relatively protected from serious severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)–related disease, but little is known about children living in settings with high tuberculosis and human immunodeficiency virus (HIV) burden. This study reflects clinical data on South African children with SARS-CoV-2.

Methods
We collected clinical data of children aged &lt;13 years with laboratory-confirmed SARS-CoV-2 presenting to Tygerberg Hospital, Cape Town, between 17 April and 24 July 2020.

Results
One hundred fifty-nine children (median age, 48.0 months [interquartile range {IQR}, 12.0–106.0 months]) were included. Hospitalized children (n = 62), with a median age of 13.5 months (IQR, 1.8–43.5 months) were younger than children not admitted (n = 97; median age, 81.0 months [IQR, 34.5–120.5 months]; P &lt; .01.). Thirty-three of 159 (20.8%) children had preexisting medical conditions. Fifty-one of 62 (82.3%) hospitalized children were symptomatic; lower respiratory tract infection was diagnosed in 21 of 51 (41.2%) children, and in 11 of 16 (68.8%) children &lt;3 months of age. Respiratory support was required in 25 of 51 (49.0%) children; 13 of these (52.0%) were &lt;3 months of age. One child was HIV infected and 11 of 51 (21.2%) were HIV exposed but uninfected, and 7 of 51 (13.7%) children had a recent or new diagnosis of tuberculosis.

Conclusions
Children &lt;1 year of age hospitalized with SARS-CoV-2 in Cape Town frequently required respiratory support. Access to oxygen may be limited in some low- and middle-income countries, which could potentially drive morbidity and mortality. HIV infection was uncommon but a relationship between HIV exposure, tuberculosis, and SARS-CoV-2 should be explored.
Racial Disparities in Coronavirus Disease 2019 (COVID-19) Mortality Are Driven by Unequal Infection Risks
Authors: Zelner Jon , Trangucci Rob , Naraharisetti Ramya , Cao Alex , Malosh Ryan , Broen Kelly , Masters Nina , Delamater Paul 
Published: November 2020

Abstract

Background
As of 1 November 2020, there have been &gt;230 000 deaths and 9 million confirmed and probable cases attributable to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the United States. However, this overwhelming toll has not been distributed equally, with geographic, race/ethnic, age, and socioeconomic disparities in exposure and mortality defining features of the US coronavirus disease 2019 (COVID-19) epidemic.

Methods
We used individual-level COVID-19 incidence and mortality data from the state of Michigan to estimate age-specific incidence and mortality rates by race/ethnic group. Data were analyzed using hierarchical Bayesian regression models, and model results were validated using posterior predictive checks.

Results
In crude and age-standardized analyses we found rates of incidence and mortality more than twice as high than for Whites for all groups except Native Americans. Blacks experienced the greatest burden of confirmed and probable COVID-19 (age-standardized incidence, 1626/100 000 population) and mortality (age-standardized mortality rate, 244/100 000). These rates reflect large disparities, as Blacks experienced age-standardized incidence and mortality rates 5.5 (95% posterior credible interval [CrI], 5.4–5.6) and 6.7 (95% CrI, 6.4–7.1) times higher than Whites, respectively. We found that the bulk of the disparity in mortality between Blacks and Whites is driven by dramatically higher rates of COVID-19 infection across all age groups, particularly among older adults, rather than age-specific variation in case-fatality rates.

Conclusions
This work suggests that well-documented racial disparities in COVID-19 mortality in hard-hit settings, such as Michigan, are driven primarily by variation in household, community, and workplace exposure rather than case-fatality rates.
ECMELLA: successful rescue cardiopulmonary support in post-coronary artery bypass graft cardiogenic shock with cardiac arrest—case report
Authors: Nogueira Zara Chan , Trevas Sara , Ferreira Hilaryano , Côrte-Real Hugo 
Published: November 2020

Abstract

Background
Cardiogenic shock is the main cause of death in hospitalized patients with acute coronary syndromes, with a high mortality rate. The management of graft thrombosis after coronary artery bypass graft (CABG) surgery is challenging and the best revascularization strategy is not well defined. In patients who develop cardiac arrest due to graft thrombosis, the benefits of mechanical support during advanced cardiac life support are uncertain. Rescue extracorporeal cardiac bypass resuscitation has been used in the context of cardiopulmonary arrest, with survival rates of around 34.7% of which 28.5% with good neurological outcome.

Case summary
We present here the case of a patient who developed cardiogenic shock after CABG graft occlusion. The patient suffered refractory cardiac arrest during percutaneous revascularization and received rescue cardiopulmonary support. Revascularization was achieved and there was a successful resuscitation with the placement of venous-arterial extracorporeal membrane oxygenation (VA-ECMO) and an Impella CP device. After a 29-day hospitalization the patient was discharged with no neurological sequelae.

Discussion
Although there is limited evidence of the benefit of a combined use of mechanical support (VA-ECMO with other mechanical devices) in the management of cardiogenic shock and cardiac arrest following CABG surgery, there seems to be a lower mortality with this approach, and possibly more favourable neurological outcomes. Further research is needed to elucidate the advantages of Impella vs. intra-aortic balloon pump combined with VA-ECMO in such patients.
Does Regime Change Affect Intergenerational Mobility? Evidence from German Reunification
Authors: Grätz Michael 
Published: November 2020

AbstractThis study uses the natural experiment of German reunification and a difference-in-differences approach to test whether the political and economic transition in East Germany in 1990 affected intergenerational occupational and educational mobility. Results obtained using data from the German Socio-Economic Panel Study show that German reunification did neither strongly affect occupational nor educational mobility. These findings are robust to operationalizing social origin in various ways. Admittedly, reunification may have had small or long-term effects on occupational and educational mobility that cannot be uncovered with the data and research design employed in this study. However, the findings rule out that there were large, short- or medium-term effects of German reunification on intergenerational mobility. These findings are at odds with theories that argue that institutional change has strong, immediate causal effects on intergenerational mobility.
Health Disparities of Older Adults in California: The Role of Sexual Identity and Latinx Ethnicity
Authors: Choi Soon Kyu , Kittle Krystal , Meyer Ilan H 
Published: November 2020

Abstract

Background and Objectives
We examined the health disparities of older adults (age 50 and older) in California at the intersection of sexual identity and Latinx ethnicity, by comparing the prevalence of health outcomes of 4 groups: LGB (lesbian, gay, and bisexual) Latinx, straight Latinx, LGB non-Latinx, and straight non-Latinx older adults.

Research Design and Methods
Data were from the 2015–2016 California Health Interview Survey. Multivariable logistic regressions tested differences among the 4 groups and the effect of covariates on prevalence of mental and physical health outcomes. We compared LGB and straight people within the same ethnic groups and Latinx and non-Latinx people within the same sexual identity groups to understand the intersectional effect of Latinx ethnicity and LGB identity.

Results
Tests by sexual identity showed that among Latinx older adults, more LGB than non-LGB people experienced serious psychological distress. Among non-Latinx older adults, there were no health disparities due to sexual identity. Tests by Latinx ethnicity showed that among LGB older adults, more Latinx than non-Latinx people were obese. Among straight people, more Latinx than non-Latinx older people had poor health, diabetes, and obesity.

Discussion and Implications
The compounded effect of Latinx and LGB identity on psychological distress is notable. However, most health disparities were among straight older adults, between Latinx and non-Latinx people, indicating that Latinx, not sexual identity, nor their intersection, was most influential. Given the importance of sociodemographic factors on health outcomes, programs targeting LGB older adults should take a comprehensive approach to understand their experiences as ethnic minorities.
A framework policy analysis of national health insurance policymaking in sub-Saharan Africa
Authors: Roll Amy , Katz Aaron , Lane Jeff 
Published: November 2020

Abstract
National health insurance (NHI) is a financing mechanism established by a national government with the goal of covering all or almost all of its citizens. A number of low- and middle-income countries have established NHIs as part of a strategy to progress towards universal health coverage. The establishment of an NHI presents a potentially significant shift in national health sector governance, but little is available in the literature regarding how policymaking authority and health governance is shared between NHIs and ministries of health (MOHs). To answer this question, we conducted a descriptive, qualitative comparative analysis of policies, including legislation, guidelines and webpages, from four sub-Saharan African countries that have established or are in the process of establishing an NHI scheme as of 2019 (Ghana, Kenya, Zambia and South Africa). We developed a novel conceptual framework comprising 16 NHI policy domains and conducted a deductive review of relevant policies. We then extracted and indexed policy elements according to this framework to facilitate comparative analysis. We found substantial variation across countries in the types of policies developed and the decision-making authority around those policies. MOHs in all four countries retained at least some decision-making power over the NHIs through regulations and appointment of board members. However, NHIs were often delegated policymaking authority in key areas including financing mechanisms, provider payments, member payments, benefit schemes, accreditation and relationships with private health insurance schemes. The results of this analysis illustrate many aspects of health regulatory power and oversight that will need to be defined as part of establishing NHIs. The approaches from these four countries and the conceptual framework presented in this manuscript may be helpful for other countries in evaluating differing approaches to shared health governance between NHIs and MOHs.
Power, control, communities and health inequalities I: theories, concepts and analytical frameworks
Authors: Popay Jennie , Whitehead Margaret , Ponsford Ruth , Egan Matt , Mead Rebecca 
Published: November 2020

Summary
This is Part I of a three-part series on community empowerment as a route to greater health equity. We argue that community ‘empowerment’ approaches in the health field are increasingly restricted to an inward gaze on community psycho-social capacities and proximal neighbourhood conditions, neglecting the outward gaze on political and social transformation for greater equity embedded in foundational statements on health promotion. We suggest there are three imperatives if these approaches are to contribute to increased equity. First, to understand pathways from empowerment to health equity and drivers of the depoliticisation of contemporary empowerment practices. Second, to return to the original concept of empowerment processes that support communities of place/interest to develop capabilities needed to exercise collective control over decisions and actions in the pursuit of social justice. Third, to understand, and engage with, power dynamics in community settings. Based on our longitudinal evaluation of a major English community empowerment initiative and research on neighbourhood resilience, we propose two complementary frameworks to support these shifts. The Emancipatory Power Framework presents collective control capabilities as forms of positive power. The Limiting Power Framework elaborates negative forms of power that restrict the development and exercise of a community’s capabilities for collective control. Parts II and III of this series present empirical findings on the operationalization of these frameworks. Part II focuses on qualitative markers of shifts in emancipatory power in BL communities and Part III explores how power dynamics unfolded in these neighbourhoods.
Endothelial cell apicobasal polarity coordinates distinct responses to luminally versus abluminally delivered TNF-α in a microvascular mimetic
Authors: Salminen Alec T , Tithof Jeffrey , Izhiman Yara , Masters Elysia A , McCloskey Molly C , Gaborski Thomas R , Kelley Douglas H , Pietropaoli Anthony P , Waugh Richard E , McGrath James L 
Published: November 2020

AbstractEndothelial cells (ECs) are an active component of the immune system and interact directly with inflammatory cytokines. While ECs are known to be polarized cells, the potential role of apicobasal polarity in response to inflammatory mediators has been scarcely studied. Acute inflammation is vital in maintaining healthy tissue in response to infection; however, chronic inflammation can lead to the production of systemic inflammatory cytokines and deregulated leukocyte trafficking, even in the absence of a local infection. Elevated levels of cytokines in circulation underlie the pathogenesis of sepsis, the leading cause of intensive care death. Because ECs constitute a key barrier between circulation (luminal interface) and tissue (abluminal interface), we hypothesize that ECs respond differentially to inflammatory challenge originating in the tissue versus circulation as in local and systemic inflammation, respectively. To begin this investigation, we stimulated ECs abluminally and luminally with the inflammatory cytokine tumor necrosis factor alpha (TNF-α) to mimic a key feature of local and systemic inflammation, respectively, in a microvascular mimetic (μSiM-MVM). Polarized IL-8 secretion and polymorphonuclear neutrophil (PMN) transmigration were quantified to characterize the EC response to luminal versus abluminal TNF-α. We observed that ECs uniformly secrete IL-8 in response to abluminal TNF-α and is followed by PMN transmigration. The response to abluminal treatment was coupled with the formation of ICAM-1-rich membrane ruffles on the apical surface of ECs. In contrast, luminally stimulated ECs secreted five times more IL-8 into the luminal compartment than the abluminal compartment and sequestered PMNs on the apical EC surface. Our results identify clear differences in the response of ECs to TNF-α originating from the abluminal versus luminal side of a monolayer for the first time and may provide novel insight into future inflammatory disease intervention strategies.