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Reelin cells and sex-dependent synaptopathology in autism following postnatal immune...
Maryam Ardalan
Tetyana  Chumak

Maryam Ardalan

and 12 more

July 14, 2021
Autism Spectrum Disorders (ASD) are heterogeneous neurodevelopmental disorders with considerably increased risk in male infants born preterm and with neonatal infection. Here we investigated the role of postnatal immune activation on hippocampal synaptopathology by targeting Reelin+ cells in mice with ASD-like behavior. C57/Bl6 mouse pups of both sexes received lipopolysaccharide (LPS, 1mg/kg) on postnatal day (P) 5. At P45, animal behavior was examined by marble burying and sociability test, followed by ex-vivo brain MRI diffusion kurtosis imaging (DKI). Hippocampal synaptogenesis, number and morphology of Reelin+ cells, and mRNA expression of trans-synaptic genes, including neurexin-3, neuroligin-1, and cell-adhesion molecule nectin-1 were analyzed at P12 and P45. Social withdrawal and increased stereotypic activities in males were related to increased mean diffusivity on MRI-DKI and overgrowth in hippocampus together with retention of long-thin immature synapses on apical dendrites, decreased volume and number of Reelin+ cells as well as reduced expression of trans-synaptic and cell-adhesion molecules. The study provides new insights into sex-dependent mechanisms that may underlie ASD-like behavior in males following PIA. We identify GABAergic interneurons as core components of dysmaturation of excitatory synapses in the hippocampus following postnatal infection and provide cellular and molecular substrates for the MRI findings with translational value.
Transmission dynamics and susceptibility patterns of SARS-CoV-2 in domestic, farmed a...
Ariful Islam
Jinnat  Ferdous

Ariful Islam

and 6 more

July 14, 2021
The exact origin of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and source of introduction into humans has not been established yet, though it might be originated from animals. Therefore, we conducted a literature review to understand the putative reservoirs, transmission dynamics, and susceptibility patterns of SARS-CoV-2 in animals. Rhinolophu s bats are presumed to be natural progenitors of SARS-CoV-2 related viruses. Initially pangolin was thought to be the source of spillover to human, but they might get infected from human or other animal species. So, the virus spillover pathways to humans remain unknown. Human-to-animal transmission has been testified in pet, farmed, zoo and free-ranging wild animals. Infected animals can transmit the virus to other animals in natural settings like, mink-to-mink, and mink-to-cat transmission. Animal-to-human transmission is not a persistent pathway, while mink-to-human transmission continues to be illuminated. Multiple companion and captive wild animals were infected by emerging alpha variant of concern (B.1.1.7 lineage) whereas Asiatic lions were infected by delta variant, (B.1.617.2). To date, multiple animal species- cat, ferrets, non-human primates, hamsters, and bats, showed high susceptibility to SARS-CoV-2 in experimental condition, while swine, poultry, cattle showed no susceptibility. The founding of SARS-CoV-2 in wild animal reservoirs can confronts the control of the virus in humans and might carry a risk to the welfare and conservation of wildlife as well. We suggest vaccinating pet, and captive animals to stop spillover and spillback events. We recommend sustainable one health surveillance at animal-human-environmental interface to detect and prevent future epidemics and pandemics by Disease X.
An introduction to analysis of R\’enyi complexity ratio of quantum states for central...
D Nath

D Nath

July 14, 2021
R\’enyi complexity ratio of two density functions is introduced for three and multidimensional quantum systems. Localization property of several density functions are defined and five theorems about near continuous property of R\’enyi complexity ratio are proved by Lebesgue measure. Some properties of R\’enyi complexity ratio are demonstrated and investigated for different quantum systems. Exact analytical forms of R\’enyi entropy, R\’enyi complexity ratio, statistical complexities based on R\’enyi entropy for integral order have been presented for solutions of pseudoharmonic and a family of isospectral potentials. Some properties of R\’enyi complexity ratio are verified for six diatomic molecules (CO, NO, N$_2$, CH, H$_2$, and ScH) and for other quantum systems.
Extent and distribution of surface soil acidity in the rainfed areas of Ethiopia
Gizaw Desta
Tibebu Kassawmar

Gizaw Desta

and 3 more

July 14, 2021
The soil acidity level is a key soil characteristic that determines soil nutrient availability, soil microbial activities and crop growth. However, studies on distribution and extent of soil acidity in Ethiopia are not available. This study was carried out to predict the extent and severity of soil acidity. The study used 88,265 soil pH samples collected from soil laboratories and 21,439 samples compiled from studies. Rainfall, altitude, slope gradient, soil, and land cover were considered to generate spatial autocorrelation and integrated into geospatial analysis to predict the soil pH. The performance of the kriging model was found to be satisfactory with a standard error of 0.77, RMSE of 0.51, and R2 of 0.74. The model estimates showed that 47% and 30.2% of the country’s total area and rainfed areas were acidic (pH<6.5), respectively. Out of the total area of the country, 3.7% is found to be extremely to strongly acidic (pH<5.5), 20.7% is moderately acidic (5.6
Defining the Bounds of Chemical Coupling Between Covalent and Hydrogen-bonds in Small...
Zi Li
Yong Yang

Zi Li

and 5 more

July 14, 2021
We seek to determine the two-way transfer of chemical character due to the coupling occurring between hydrogen-bonds and covalent-bonds known to account for the unusual strength of hydrogen-bonds in water. We have provided a vector-based quantification of the chemical character of uncoupled hydrogen-bonds and covalent-bonds and then determined the effects of two-way coupling consistent with the total local energy density H(rb) < 0 for hydrogen-bonds. We have calculated the precessions Kʹ of the eigenvectors around the bond-path for the Ehrenfest Force F(r) and compared with the corresponding QTAIM Kʹ. In doing so we explain why the Ehrenfest Force F(r) provides insights into the coupling between the hydrogen and covalent bonds whilst QTAIM cannot. Conditions for favorable transfer of electron momentum from the hydrogen atom of a sigma bond to the hydrogen-bond are found, with excellent agreement with the hydrogen-bond BCP and covalent-bond BCP separations providing the theoretical bounds for coupling.
Oceanic Records of North American Bats and Implications for Offshore Wind Energy Deve...
Donald Solick
Christian Newman

Donald Solick

and 1 more

July 14, 2021
Offshore wind energy is a growing industry in the United States, and renewable energy from offshore wind is estimated to double the country's total electricity generation. There is growing concern that land-based wind development in North America is negatively impacting bat populations, primarily long-distance migrating bats, but the impacts to bats from offshore wind energy is unknown. Bats are associated with the terrestrial environment, but have been observed over the ocean. In this review, we synthesize historic and contemporary accounts of bats observed and acoustically recorded offshore over North American waters to ascertain the spatial and temporal distribution of bats flying offshore. We integrate these records with studies of offshore bats in Europe and of bat behavior at land-based wind energy studies to examine how offshore wind development could impact North American bat populations. We find that most offshore bat records are of long-distance migrating bats and records occur during autumn migration, the period of highest fatality rates for long-distance migrating bats at land-based wind facilities in North America. We summarize evidence that bats may be attracted to offshore turbines for roosting and foraging opportunities, potentially increasing their risk of collision, but that higher wind speeds offshore can potentially reduce the amount of time that bats are exposed to risk. We identify knowledge gaps and hypothesize that a combination of mitigation strategies may be the most effective approach for minimizing impacts to bats and maximizing offshore energy production.
The Metabolism and Excretion of the Dipeptidyl Peptidase 4 Inhibitor [14C] Cetaglipti...
Jinmiao Lu
Yicong Bian

Jinmiao Lu

and 12 more

July 14, 2021
Aims: The metabolism and excretion of teneligliptin were investigated in healthy male volunteers after a single oral dose of 100mg/50μCi [14C] cetagliptin. Methods: Plasma, Urine, and feces were collected at regular intervals from six healthy male volunteers, and were analysed for total radioactivity, unchanged cetagliptin and metabolites profile. Results: The highest concentrations in plasma (Cmax) were achieved at 0.75 h postdose. Approximately 53.13% of plasma AUC of total radioactivity was accounted for by parent drug. By 336 h after administration, 91.68% of the administered radioactivity was excreted, and the cumulative excretion in the urine and faeces was 72.88% and 18.81%, respectively. Each metabolite plasma AUC was not higher than 2.93% of plasma AUC of total radioactivity. Four metabolites were detected at trace levels, and it involved hydroxylation (M436-1 and M436-3), N-sulfation (M500), and N-carbamoyl glucuronidation (M640B). These metabolites were detected also in plasma, urine, and feces at low levels, except that metabolite M640B was not detected in feces. No metabolite was observed with >10% of parent compound systemic exposure after oral administration. There were no apparent treatment-related clinically relevant changes in vital signs and clinical laboratory tests. Conclusion: Unchanged cetagliptin was the most abundant radioactive component in all matrices investigated. The primary route of excretion of radioactivity was via the kidneys. There were no major metabolites in plasma. Cetagliptin is a promising DPP-4 inhibitor for the treatment of patients with type 2 diabetes.
The diagnosis and treatment of papillary cystadenoma of the esophagus by the Endoscop...
Zhaomeng Zhuang
Yiguang Zhang

Zhaomeng Zhuang

and 3 more

July 14, 2021
Papillary cystadenoma is a epithelial benign tumor of the salivary gland, most commonly in the oral cavity, head and neck. There was no difference in the sex distribution of patients, and the age of onset was 30-50 years old. The clinical manifestations are: slow growth local mass, long course of disease, some can be as long as decades, most patients have no obvious conscious symptoms, a few patients can appear local pain or distension. However, papillary cystadenoma of the esophagus is very rare, and few cases have been reported. We report a case of papillary cystadenoma of the lower esophagus and its treatment by endoscopy. The patient had no obvious complaint of discomfort. Routine gastroscopy found submucosal protuberant lesions in the lower segment of the esophagus (Figure 1), and endoscopic ultrasonography suggested cystic and solid lesions originating from the muscular layer of the esophageal mucosa, thus mesenchymal tumor was preliminarily diagnosed (Figure 2). After the exclusion of relevant contraindications, preoperative examinations were completed and the tumor was completely removed by esophageal submucosal tumor excision under endoscopy (Figure 3). Postoperative pathology indicated the tumor is papillary cystadenoma, and immunohistochemistry indicated that: CK7(+), CK(+), and basal cells of P63 (+) (Figure 4, 5). Due to the rare case, combined with the process of the diagnosis and treatment of this case, we reviewed the relevant reports on the papillary cystadenoma of the digestive tract in the past 60 years, in order to help clinicians to improve their understanding and treatments of the papillary cystadenoma.
Plant-animal interactions in the era of environmental DNA (eDNA) – a review
Pritam  Banerjee
Kathryn Stewart

Pritam Banerjee

and 11 more

February 18, 2022
Pritam Banerjee1, 2, Kathryn A. Stewart3, Caterina M. Antognazza4, Ingrid V. Bunholi5, Kristy Deiner6, Matthew A. Barnes7, Santanu Saha8, Héloïse Verdier9, Hideyuki Doi10, Jyoti Prakash Maity2, Michael W.Y. Chan1, Chien Yen Chen2*1Department of Biomedical Sciences, Graduate Institute of Molecular Biology, National Chung Cheng University, 168 University Road, Ming-Shung, Chiayi County 62102, Taiwan2Department of Earth and Environmental Sciences, National Chung Cheng University, 168 University Road, Ming-Shung, Chiayi County 62102, Taiwan.3 Institute of Environmental Science, Leiden University, 2333 CC Leiden, The Netherlands4 Department of Theoretical and Applied Science, University of Insubria, Via J.H. Dunant, 3, 21100, Varese, Italy5 Department of Biology, Indiana State University, Terre Haute, IN 47809, USA6 Department of Environmental Systems Science, ETH Zurich, Universitätstrasse 16, CH-8092 Zurich, Switzerland7 Department of Natural Resources Management, Texas Tech University, Lubbock, TX USA8Post Graduate Department of Botany, Bidhannagar College, Salt Lake City, Kolkata 700064, India9Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France10Graduate School of Information Science, University of Hyogo, 7-1-28 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, JapanAbstract Plant-animal interactions (PAI) represent major channels of energy transfer through ecosystems, where both positive and antagonistic interactions simultaneously contribute to ecosystem functioning. Monitoring PAI therefore increases understanding of environmental health, integrity and functioning, and studying complex interactions through accurate, cost-effective sampling can aid in the management of detrimental anthropogenic impacts. Environmental DNA (eDNA)-based monitoring represents an increasingly common, non-destructive approach for biomonitoring, which could help to elucidate PAI. Here, we focused our foundation to discuss the potential of eDNA in studying PAI on the literature existing from 2009 to 2021 using a freely accessible web search tool. The search was conducted by using key words involving eDNA and PAI, including both species-specific and metabarcoding approaches, recovering 43 studies. We summarise advantages and current limitations of such approaches, and we offer research priorities that will potentially improve future eDNA-based methods for PAI analysis. Our review has demonstrated that numerous studies exist using eDNA to identify PAI (e.g., pollination, herbivory, mutualistic, parasitic relationships), and although eDNA-based PAI studies remain in their infancy, to date they have identified higher taxonomic diversity in several direct comparisons to DNA-based gut/bulk sampling and conventional survey methods. Research into the influencing factors of eDNA detection involved in PAI (e.g., origin and types, methodological standardization, database limitations, validation with conventional surveys, and existing ecological models) will benefit the growth of this application. Thus, implementation of eDNA methods to study PAI can particularly benefit environmental biomonitoring surveys that are imperative for biodiversity health assessments.
Large paracetamol overdose -- higher dose NAC is required
D Bateman

D Bateman

July 13, 2021
Paracetamol poisoning continues to be a worldwide problem and despite the availability of an affective antidote, N-acetylcysteine (NAC), the optimal way to use this antidote, particularly following very large doses of paracetamol, has not been established. Recent case series have shown an increased toxicity from paracetamol, even in those receiving prompt NAC therapy, at high doses of paracetamol, particularly in patients above the 300 mg/L nomogram treatment line. Clinical trial evidence supporting shorter NAC dosing now allows the possibility for intensifying treatment without the risk of very high rates of ADRs. New biomarkers also show the possibility of early identification of patients at risk of liver injury who might also benefit from increased intensity treatment. This article discusses these data and proposes a logical therapy for increasing NAC dosing which now requires clinical trial testing.
METHOD OF GENERALIZED FUNCTIONS IN PLANE BOUNDARY VALUE PROBLEMS OF UNCOUPLED THERMOE...
Assiyat Dadayeva
Lyudmila Alexeyeva

Assiyat Dadayeva

and 1 more

July 13, 2021
Nonstationary boundary value problems of uncoupled thermoelasticity are considered. A method of boundary integral equations in the initial space-time has been developed for solving boundary value problems of thermoelasticity by plane deformation. According to generalized functions method the generalized solutions of boundary value problems are constructed and their regular integral representations are obtained. These solutions allow, using known boundary values and initial conditions (displacements, temperature, stresses and heat flux), to determine the thermally stressed state of the medium under the influence of various forces and thermal loads. Resolving singular boundary integral equations are constructed to determine the unknown boundary functions.
Beneficial worm allies warn plants of parasite attack belowground and reduce abovegro...
Shokoofeh Kamali
Ali Javadmanesh

Shokoofeh Kamali

and 10 more

July 13, 2021
We investigated responses of tomato to two functional guilds of nematodes - plant parasite (Meloidogyne javanica) and entomopathogens (Heterorhabditis bacteriophora, Steinernema feltiae belowground, and S. carpocapsae) - as well as a leaf mining insect (Tuta absoluta) aboveground. Our results indicate that entomopathogenic nematodes (EPNs): 1) induced plant defense responses, 2) reduced root knot nematode (RKN) infestation belowground and 3) reduced herbivore (T. absoluta) host preference and performance aboveground. Concurrently, we investigated the plant signaling mechanisms underlying these interactions using biochemical and transcriptome analyses. We found that both entomopathogen and parasite triggered immune responses in plant roots with shared gene expression. Tomato plants responded similarly to presence of RKN or EPN in the root zone, by rapidly activating polyphenol oxidase (PPO) and guaiacol peroxidase (GP) activity in roots, but simultaneously suppressed this activity in aboveground tissues. We quantified changes in gene expression in tomato that may play essential roles in defense response to RKN, which were also coincidentally triggered by EPN. Overall, EPN inoculation directly mediated enhanced plant defense and reduced subsequent RKN infection. Likewise, we show that EPNs modulate plant defense against RKN invasion. Inoculation of tomato roots with EPNs belowground reduced both host preference and performance of the aboveground herbivore, T. absoluta. Inoculations of roots with EPN also triggered an immune response in tomato which could explain an observed decrease in egg laying and developmental performance exhibited by herbivores on EPN-inoculated plants. Our results support the hypothesis that subterranean EPNs activate a battery of plant defenses associated with systemic acquired resistance (SAR) and/or induced systemic resistance (ISR) with antagonistic effects on temporally co-occurring subterranean plant pathogenic nematodes a
Brucellosis Reemergence after a Decade of Quiescence in Palestine, 2015-2017: a Serop...
Yaqoub Ashhab
Bessan  Aljanazreh

Yaqoub Ashhab

and 5 more

July 13, 2021
Brucellosis is an endemic disease in many developing countries and ranked by the World Health Organization among the top seven “neglected zoonoses”. Although a Palestinian brucellosis control program was launched in 1998, the disease reemerged after 2012. Interestingly, a similar reemerging pattern was reported in the neighboring Israeli regions. The aim of this work was to characterize the reemerging strains and delineate their genetic relatedness. During 2015-2017, blood samples from 1324 suspected patients were analyzed using two serological tests. Seropositive samples were cultured, and their DNAs were analyzed by different genetic markers to determine the involved Brucella species and rule out any possible involvement of the Rev.1 vaccine strain. The rpoB gene was sequenced from 9 isolates to screen for rifampicin resistance mutations. Multi Locus VNTR Analysis (MLVA-16) was used for genotyping the isolates. The molecular analysis showed that all isolates were B. melitensis strains unrelated to the Rev.1 vaccine. The rpoB gene sequences showed four single nucleotide variations (SNVs) not associated with rifampicin resistance. MLVA-16 analysis clustered the isolates into 22 unique genotypes that belong to the East Mediterranean lineage. Altogether, our findings show that the reemergence of brucellosis was due to B. melitensis strains of local origin, the Palestinian and Israeli control programs’ weaknesses could be a major factor behind the reemergence of the disease. However, other socioeconomic and environmental factors must be investigated. Moreover, strengthening brucellosis control programs and enhancing cooperation between all stakeholders is essential to ensure long-term program outcomes to fight brucellosis.
Sex-dependent differential transcript expression in the placenta of growth restricted...
Jessica O'Callaghan
Vicki Clifton

Jessica O'Callaghan

and 5 more

July 13, 2021
Objective: To characterise placental gene expression at term to evaluate sex-specific genetic changes that occur in small for gestational age (SGA) infants. Design: Case control study. Setting: Australian hospitals. Samples: Twelve human placental samples from pregnancies that were either SGA or appropriate for gestational age (AGA). Methods: RNA-sequencing of term placental tissue from both SGA and AGA infants. Candidate genes associated with fetal size and fetal sex were identified using differential gene expression and weighted gene co-expression network analyses. Single-cell sequencing data was used for candidate validation and to estimate candidate transcript expression in specific placental cell populations. Main outcome measures: Functions of differentially expressed genes in the placenta of SGA infants that differed by fetal sex. Results: Differential gene expression and weighted gene co-expression network analyses identified 403 candidate transcripts associated with SGA infants. One hundred and three of these transcripts showed sex-specific expression. Sex-independent transcript expression for genes involved in protein synthesis, and sex-dependent transcript expression for genes involved in cell cycle processes in males and endoplasmic reticulum stress in females was validated (17 and 7 transcripts for females and males) in published placental RNA-sequencing datasets. Conclusions: Sexual dimorphism is an important consideration when examining placental dysfunction and poor fetal growth. This study identified activation of shared and divergent molecular mechanisms (i.e., cell cycle and endoplasmic reticulum stress), in response to an adverse environmental stressor.
A comprehensive study of indole catalytic hydrodenitrogenation under hydrothermal con...
Xu Liu
Yang Guo

Xu Liu

and 3 more

July 13, 2021
This article focuses on the catalytic hydrodenitrogenation (HDN) mechanism of indole under hydrothermal conditions. Both gaseous hydrogen and liquid hydrogen donor formic acid (FA) can improve indole conversion and total yield of denitrogenated products. Ru/C showed the highest activity among the catalysts for indole conversion in all temperature conditions with the existence of H2 and 91.17 % indole was converted at 400 °C and 60 min. Based on reaction kinetic experiments, a kinetic model was developed to describe the hydrothermal HDN reaction of indole over the home-made Ni80Ru20/γ-Al2O3 catalyst, which clearly captured all data trends and fitted the temporal variation of all major liquid products. High activation energy for formation of O-containing substance o-cresol from both mathematical fitting and density functional theory (DFT) calculation indicated a rare occurrence of reaction between pyrrole ring-opening product methyl aniline and H2O, consistent with experimental observation that only a trace of o-cresol was detected.
Recurrent Herpes simplex virus infection after AstraZeneca vaccination for covid 19:...
Mohammadreza ardalan
Hamidreza Moslemi

Mohammadreza ardalan

and 4 more

July 13, 2021
Vaccination against covid 19 have been launched by many countries. Since then, viral infection after vaccination have been reported. Herpes virus reactivation has been reported following vaccinations. This study reports a case of recurrent Herpes Simplex Virus (HSV) after chadox1 ncov-19 (azd1222) vaccine in a 28 years old man
Case Report: The Physiology of a Preventable Near Death in a Hot Tub
Bruce Becker MD

Bruce Becker

July 13, 2021
This is a case report of a very preventable near-death event involving a 6-year-old female who had a syncopal event due to hyperthermia in an overheated hot tub and drowned. She was resuscitated but due to the combination of anoxia and hyperthermia has been left with permanent brain damage.
Reactive astrocytes augment hippocampal inhibitory tone via GABA transporter-3/4 to f...
Yousif Ali
Anam Islam

Yousif Aldabbagh

and 4 more

July 13, 2021
Background and Purpose: Cognitive decline is a major symptom in Alzheimer’s disease (AD), which is closely associated with synaptic excitatory-inhibitory imbalance. Here, we investigated whether astrocytic mechanisms involving the astrocyte-specific GABA transporter 3/4 (GAT3/4) play a role in altering the synaptic balance in AD and whether these mechanisms correlate with presynaptic cannabinoid type-1 receptors (CB1-Rs). Experimental approach: Using the APPNL-F/NL-F knock-in mouse model of AD, aged-matched to wild-type mice, we performed in vitro electrophysiological whole-cell recordings combined with immunohistochemistry in the CA1 and dentate gyrus (DG) regions of the hippocampus. Comparative neuroanatomy experiments were also performed in post-mortem brain tissue from human AD patients, age-matched to healthy controls. Results: We observed a higher expression of GABA content and GAT3/4 co-localised with reactive astrocytes, which enhanced tonic inhibition in the CA1, and DG of APPNL-F/NL-F mice compared to the age-matched wild-type animals. Blocking GAT3/4 - associated tonic inhibition in APPNL-F/NL-F mice resulted in an enhanced frequency of synaptic excitation, suggesting a presynaptic mechanism. These data also correlated with an up-regulation of CB1-Rs in astrocytes and cholecystokinin (CCK)-containing interneurons, which also enhanced tonic inhibition in the AD model, but did not affect GAT3/4 -associated tonic inhibition. The neuroanatomical results were mirrored in post-mortem tissue of AD patients. Conclusions: Our data suggest that reactive astrocytes lead to augmented tonic inhibition in the hippocampus, which probably plays an important presynaptic compensatory role in attempting to restore AD-associated neuronal hyperactivity. Therefore, reducing tonic inhibition through GAT3/4 may not be a good therapeutic strategy for AD.
Double Inlet Left Ventricle with common AV valve, discordant ventriculo-arterial conn...
Usha Nandhini Sennaiyan
Mani Ram Krishna

Usha Nandhini Sennaiyan

and 1 more

July 13, 2021
Double Inlet Left Ventricle through a common AV valve is a rare type of functionally univentricular heart. We report a fetus with double inlet left ventricle with discordant ventriculo-arterial connection and pulmonary atresia. The anatomy was readily apparent on three dimensional rendering by spatio-temporal imaging correlation technique(STIC)
Development and Preclinical Evaluation of Virus Like Particle Vaccine Against COVID-1...
Ismail Yilmaz C
Emre Ipekoglu

Ismail Yilmaz C

and 36 more

July 14, 2021
Background Vaccines that incorporate multiple SARS-CoV-2 antigens can further broaden the breadth of virus-specific cellular and humoral immunity. This study describes the development and immunogenicity of SARS-CoV-2 VLP vaccine that incorporates the 4 structural proteins of SARS-CoV-2. Methods VLPs were generated in transiently transfected HEK293 cells, purified by multimodal chromatography and characterized by tunable resistive pulse sensing, AFM, SEM, and TEM. Immunoblotting studies verified the protein identities of VLPs. Cellular and humoral immune responses of immunized animals demonstrated the immune potency of the formulated VLP vaccine. Results Transiently transfected HEK293 cells reproducibly generated vesicular VLPs that were similar in size to and expressing all four structural proteins of SARS-CoV-2. Alum adsorbed, K3-CpG ODN adjuvanted VLPs elicited high titer anti-S, anti-RBD, anti-N IgG, triggered multifunctional Th1 biased T cell responses, reduced virus load and prevented lung pathology upon live virus challenge in vaccinated animals. Conclusion These data suggest that VLPs expressing all four structural protein antigens of SARS-CoV-2 are immunogenic and can protect animals from developing COVID-19 infection following vaccination.
Litter mixing effect on decomposition rate and nutrient release: low quality leaves o...
Lili Wei

Lili Wei

October 05, 2021
Coastal wetlands are among the most carbon-rich ecosystems in the world. Litter decomposition is a major process controlling soil carbon input. Litter mixing has shown a non-additive effect on the litter decomposition of terrestrial plants particularly of those species having contrasting litter quality. But the non-additive effect has been rarely tested in coastal plants which generally having low-quality litters. We selected three common mangrove species and one saltmarsh species, co-occurring in subtropical coasts, to test whether the non-additive effect occurs when the litters of these coastal species mixing together. We are also concerned whether the changes in the decomposition rate of litter will affect the nutrient contents in waters. A litter-bag experiment was carried out in a glasshouse with single and mixed leaf litters. A non-additive effect was observed in the litter mixtures of mangrove species Aegiceras corniculatum vs. Kandelia obovata (antagonistic) and A. corniculatum vs. Avicennia marina (synergistic). Whereas, the mixture of A. corniculatum (mangrove species) and Spartina alterniflora (saltmarsh species) showed an additive effect. The strength of the non-additive effect was unrelated to the initial trait dissimilarity of litters. Instead, the decomposition rate and mass remaining of litter mixtures were strongly related to the carbon concentrations in litters. Nutrient content in waters was dependent on the decomposition rate of litter mixtures but not on the initial nutrient concentrations in litters. Despite the behind mechanisms were not yet revealed by the current study, these findings have improved our understanding of the litter decomposition of coastal species and the consequent nutrient release.
Therapeutic Effect of Steroids on Vestibular Neuritis: Systematic Review and Meta-ana...
Gaeun Kim
Jae-Hyun Seo

Gaeun Kim

and 3 more

July 12, 2021
Objectives: The present meta-analysis sought to assess further evidence for the efficacy of steroids in vestibular neuritis (VN). Methods: The PubMed, EMBASE and Cochrane Library databases were searched through August 30, 2019. The main outcome measures were 1) complete caloric recovery, 2) improvement of canal paresis (CP) in caloric testing, and 3) dizziness handicap inventory. The follow-up times were divided into short, mid, and long-term. The main outcome measures were 1) complete caloric recovery, 2) improvement of canal paresis (CP) in caloric testing, and 3) dizziness handicap inventory. Results: Among 276 records identified, 5 studies (n = 253) were included in the analysis. The therapeutic effect of steroid on VN was confirmed (Hedges’g = 0.172, 95% CI 0.048 to 0.295, p = .006). This effect was statistically significant on long-term follow-up (Hedges’g = 0.496, 95% CI 0.285 to 0.708, p < .0001). The therapeutic effect of steroids on VN was better than that of non-steroid treatment (Hedges’g = 0.299, 95% CI 0.107 to 0.490, p = .002). However, this effect was obscured by combination of other treatments. The therapeutic effect of steroids on VN was statistically significant regarding complete caloric recovery and improvement in CP (Hedges’g = 0.364, 95% CI 0.181 to 0.547, p < 0.0001; Hedges’g = 0.592, 95% CI 0.315 to 0.5869, p < .0001) Conclusions: The results suggest that corticosteroids are effective at VN recovery, especially in long-term follow-up. More data are required before recommendations can be made regarding management in patients on corticosteroids.
Enhanced detection of atrial arrhythmias by implantable monitors: Have we found what...
Michael Lloyd

Michael Lloyd

July 12, 2021
Enhanced detection of atrial arrhythmias by implantable monitors: Have we found what we are looking for?
Single-stranded RNA oligonucleotides that recruit endogenous hnRNPA1 enable the targe...
Justin Melendez
Ananya Pal

Justin Melendez

and 3 more

July 12, 2021
Targeted gene knockdown has become one of the most powerful tools in molecular biology and holds substantial promise in therapeutic applications. While existing technologies such as siRNAs, CRISPRi, and ASOs effectively and specifically reduce gene expression, few can be used to first discover the genes that influence a particular phenotype and then directly transition to being used as oligonucleotide therapeutics. Thus, a tool that could help bridge the gap between target discovery and the development of therapeutic leads would benefit the scientific community. Here, we present hnRNPA1 recruiting oligonucleotides, or AROs, as single-stranded RNA (ssRNA) molecules that knockdown transcript levels of target genes. AROs target specific pre-mRNA transcripts via sequence homology and leverage the ubiquitous and abundant endogenous RNA-binding protein hnRNPA1 to degrade target transcripts. Using RT-qPCR, we show that AROs effectively knock down target genes when delivered via a plasmid and expressed using a Pol II promoter or when delivered directly as single-strand RNAs. Additionally, as proof of principle, we use a ssRNA ARO to knockdown KRT14 in squamous cell carcinoma and show reduced invasive potential. We believe AROs fill an important niche in the scientific toolbox by taking advantage of endogenous RNA binding machinery for RNA knockdowns.
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