AUTHOREA
Log in Sign Up Browse Preprints
LOG IN SIGN UP

Preprints

Explore 66,105 preprints on the Authorea Preprint Repository

A preprint on Authorea can be a complete scientific manuscript submitted to a journal, an essay, a whitepaper, or a blog post. Preprints on Authorea can contain datasets, code, figures, interactive visualizations and computational notebooks.
Read more about preprints.

Trans-species transmission of Brucellae among ruminants hampering brucellosis control...
Yamen Hegazy
Nour Abdel-Hamid

Yamen Hegazy

and 10 more

March 30, 2022
For the aim of genotypic fingerprinting of Brucella melitensis bv3 isolated from different ruminant species in Kafrelsheikh governorate, Egypt, a multilocus variable-number tandem-repeat analysis (MLVA 16) has been approached. The MLVA 16 was performed on 41 B. melitensis bv3 isolates identified by bacteriological and molecular techniques. Thirty-one isolates originated from the preferential host (28 sheep and three goats), and ten isolates from atypical hosts (nine cattle and one buffalo). Recovering the same genotype in two different animal species suggests cross-species adaptation of B. melitensis bv3 to different atypical ruminant species in Egypt. Furthermore, the isolation of B. melitensis from aborted cows after the entry of a replacement cow from an unknown brucellosis status herd in cattle farms that had never reared small ruminants indicates that cows can be infected and spread the infection without the presence of the original host. Our results further showed that different genotypes of B. melitensis could be isolated from different samples of the same animal. The local geographic distribution of genotypes showed a very close genetic relatedness with previously reported genotypes outside the study area. Worldwide, all genotypes and strains identified in this study were mostly related to the Western Mediterranean lineage and were less likely to the Americas clonal lineage. In conclusion, uncontrolled animal movement and the ability of B. melitensis to spread among atypical hosts in the absence of the original hosts are potential causes for the failure of brucellosis control programs in endemic areas. The legal importation and illegal movement of cattle and sheep are the main factors for maintaining the infection of B. melitensis within the country. Further investigations are required to understand the reasons for the presence of more than one genotype of B. melitensis in the same animal and the efficacy of the current applied strategy for brucellosis control.
No association between proton pump inhibitor use and dementia risk: data mining of US...
bin wu
Qiaozhi Hu

bin wu

and 5 more

March 30, 2022
AIM: Proton pump inhibitors (PPIs) were widely used around the world. Studies suggested conflicting results between PPIs treatment and the risk of dementia. This study examined the association between PPIs and dementia risk by mining the US FDA Adverse Event Reporting System (FAERS) database. METHODS: We identified six PPI agents and adverse reports of dementia based on FAERS database from 2004 to 2019. We employed reporting odds ratio (ROR) and proportional reporting ratio (PRR) to detect the signals of dementia relevant to PPIs. We also analyzed characteristics of PPI reports, compared dementia events between short- and long- duration PPIs treatment. RESULTS: We identified 2104 dementia cases with PPIs treatment. We did not detect significant signals between PPIs and dementia, ROR = 0.99, 95%CI 0.94 - 1.03, PRR = 0.99, 95%CI 0.95 - 1.03, even in gastroesophageal reflux disease cases ROR = 0.65, 95%CI 0.58 - 0.73, PRR = 0.67, 95%CI 0.60 - 0.74. No significant differences of dementia events were detected between short- and long- duration groups, the OR (95%CI) of the 6 months, 1 year, 3 years and 5 years comparison were 0.85 (0.68 - 1.06), 0.92 (0.71 - 1.18), 0.81 (0.57 - 1.15) and 0.79 (0.52 - 1.22), respectively. CONCLUSIONS: Based on the current FAERS data mining, we discovered no association between PPIs use and the risk of dementia.
Catheter ablation of ventricular arrhythmias originating from the region of DGCV-AIV...
Cheng Zheng
Wei-Qian Lin

Cheng Zheng

and 6 more

March 30, 2022
BACKGROUND For ventricular arrhythmias (VAs) originating from the left ventricular epicardium adjacent to the transitional area from the great cardiac vein to the anterior interventricular vein (DGCV-AIV), the most efficient catheter manipulation approach has not been fully elucidated. OBJECTIVE This study aimed to investigate a more appropriate catheter manipulation approach for DGCV-AIV VAs. METHODS One hundred twenty-three consecutive patients with DGCV-AIV VAs were retrospectively analyzed. All these patients were firstly mapped and ablated by conventional approach (Non-Swartz sheath support (NS) approach). When target sites not been reached, Swartz sheath support (SS) approach was attempted. If target sites still unreached, the hydrophilic coated guide wire and left coronary angiographic catheter-guided deep engagement of Swartz sheath in GCV to support ablation catheter was performed. RESULTS A total of one hundred three VAs (103/123, 83.74%) were successfully eliminated in DGCV-AIV. By NS approach, the tip of catheter reached DGCV in 39.84% VAs (49/123), reached target sites in 35.87% VAs (44/123), and achieved successful ablation in 30.89% VAs (38/123), which was significantly lower than by SS approach (88.61% (70/79), 87.34 % (69/79), and 84.81% (67/79), P<0.05). In left anterior oblique (LAO) view, angle between DGCV and AIV<83° indicated an inaccessible AIV by catheter tip with a predictive value of 94.5%. Width/height of coronary venous system>0.69 more favored a SS approach with a predictive value of 87%. CONCLUSION For RFCA of VAs arising from DGCV-AIV, the SS approach facilitates the catheter tip achieve target sites and contributes to a successful ablation.
Copper tolerance of wheat plants mediated by TaGST1 gene and it upstream regulatory f...
Ge-Zi Li
Yong-Xing Zheng

Ge-Zi Li

and 7 more

March 30, 2022
Copper (Cu) is an important plant micronutrient; however, excessive Cu can disturb the protein structure, affect plant growth and development, and pose as a potential human health risk. Glutathione S-transferase (GST) is the key enzyme in glutathione (GSH) synthesis; thus, it plays crucial role in Cu detoxification. Nonetheless, its regulatory mechanisms remain largely unclear. In this study, we identified a Cu-induced glutathione S-transferase 1 (TaGST1) gene in wheat. Yeast one-hybrid (Y1H) between TaGST1 promoter and Cu-stressed wheat leaf cDNA library was performed and screened out TaWRKY74 transcription factor. Their bind were further verified by using another Y1H and luciferase (LUC) assays Functions of TaWRKY74 were further tested by using transiently silence and overexpression methods. Under Cu stress, TaWRKY74 and TaGST1 expression, GST activity, and GSH content were significantly inhibited in transiently TaWRKY74-silenced wheat plants. However, the contents of hydrogen peroxide (H2O2), malondialdehyde (MDA), and Cu were significantly increased in these silenced wheat plants. Further investigation found that transiently ectopic overexpression of TaWRKY74 increased GSH content, whereas decreased MDA content during Cu stress. Notably, exogenous application of GSH could reversed the adverse effects of transiently TaWRKY74-silenced wheat plants during Cu stress. Taken together, our results suggested that TaWRKY74 regulated TaGST1 expression and affected GSH accumulation under Cu stress, and could be useful to ameliorate Cu toxicity for crop food safety.
Predictors of late response to cardiac resynchronization therapy: When should we judg...
Takumi Oki
Shunsuke Ishii

Takumi Oki

and 11 more

March 30, 2022
Background: Left ventricular reverse remodeling by cardiac resynchronization therapy (CRT) can significantly improve the prognosis for heart failure (HF) patients. The time course of CRT response remains poorly characterized. Method and Results: This retrospective study included 99 HF patients who received a CRT device at a single center from 2006 to 2017. CRT response was defined as ≥10% improvement in left ventricular ejection fraction on follow-up. They were divided into three groups: early responders (ERs): 49 patients with CRT response by the six-month follow-up; late responders (LRs): 17 patients with CRT response between six-month and three-years; and non-responders (NRs): 33 patients with no CRT response. The ERs and LRs had significantly lower rates of HF hospitalization and all-cause deaths than the NRs. Multivariate logistic regression analysis identified that narrower QRS duration before implantation (p = 0.046) and the presence of moderate to severe mitral regurgitation (MR) at the six-month follow-up (p = 0.035) as independent predictors of NRs. Conclusions: Regardless of the timing, HF patients who have CRT response have a better long-term prognosis than NRs. The Severity of MR can predict whether a patient with no response at the six-month follow-up will be NRs.
Reconstruction of the Left Atrium for Atrial Fibrillation Ablation using the Machine...
Arie Schwartz
Ehud Chorin

Arie Schwartz

and 8 more

March 30, 2022
IIntroduction: Atrial fibrillation (AF) ablation requires a precise reconstruction of the left atrium (LA) and pulmonary veins (PV). Model-based FAM (m-FAM) is a novel module recently developed for the CARTO system which applies machine-learning techniques to LA reconstruction. We aimed to evaluate the feasibility and safety of a m-FAM guided AF ablation as well as the accuracy of LA reconstruction using the cardiac computed tomography angiography (CTA) of the same patient LA as gold standard, in 32 patients referred for AF ablation. Methods: Consecutive patients undergoing AF ablation. The m-FAM reconstruction was performed with the ablation catheter (Group 1) or a Pentaray catheter (Group 2). The reconstruction accuracy was confirmed prior to the ablation by verification of pre-specified landmarks of the LA and PVs by intracardiac echocardiogram (ICE) visualization and fluoroscopy. A cardiac CTA performed before the ablation was used as gold standard of LA anatomy. For each patient, the m-FAM reconstruction was compared to his/her cardiac CTA. Results: The m-FAM reconstruction was accurate in all patients regardless the catheter used for mapping. In 12% re acquisition of the LA landmarks was necessary to improve the accuracy. m-FAM time was shorter in group 2 while the M-Fam fluoroscopy time was similar. Pulmonary vein isolation was achieved in 100% of patients without major complications. The m-FAM reconstructions accurately resemble the cardiac CTA of the same patients. Conclusions: The m-FAM module allows for rapid and precise reconstruction of the LA and PV anatomy, which can be safely used to guide AF ablation.
Mesonephric adenocarcinoma of the cervix with focal endometrioid adenocarcinoma of th...
Zelal Güngördü
Zelal Rojda Güngördü

Zelal Güngördü

and 4 more

March 30, 2022
IntroductionMesonephric carcinomas are derived from remnants of the paired mesonephric ducts. These remnants may present in the lateral walls of the cervix (%22), vagina, uterine corpus and meso-ovarium.1 Mesonephric adenocarcinoma is a rare form of female tract malignancy, and to our knowledge, there are 56 cases (including our case) of cervical mesonephric adenocarcinoma published thus far. Presenting symptoms of the disease may vary. Due to the rarity of this cancer, histopathological misclassifications may occur. Treatment and prognosis of mesonephric adenocarcinomas are also not well known to this present day. Standard guidelines for the surgical and medical approach to this disease have not been established yet. We present a rare case of cervical mesonephric adenocarcinoma with a focal endometrioid endometrial adenocarcinoma component.
A two-grid P_0^2-P_1 mixed finite element scheme for semilinear elliptic optimal cont...
changling XU

changling XU

March 30, 2022
This paper aims to construct a two-grid scheme for distributed optimal control governed by semilinear elliptic equations. The state and co-state are approximated by the P_0^2-P_1 pair and the control variable is approximated by piecewise constant functions. First, a priori error estimates for the control variable, the state variables and the co-state variables are obtained. Second, a two-grid P_0^2-P_1 mixed finite element scheme is presented and the corresponding error is analyzed. Finally, a numerical example demonstrating our theoretical results is also presented in this paper.
ECTHYMA GANGRENOSUM IN CHILDREN WITH CANCER: DIAGNOSIS AT A GLANCE. A retrospective s...
Paola Muggeo
Daniele Zama

Paola Muggeo

and 14 more

March 30, 2022
Purpose. To describe ecthyma gangrenosum (EG) characteristics and complications in a large multicenter pediatric retrospective collection of children with malignancies or bone marrow failure syndromes. Methods. EG episodes diagnosed in the period 2009-2019 were identified by a retrospective review of clinical charts at centers belonging to the Italian Pediatric Hematology Oncology Association. Results. EG occurred in 38 children (male/female 16/22; median age 5.2 years) with hematological malignancy (33), allogeneic stem cell transplantation (2) or relapsed/refractory solid tumor (3). The involved sites were: perineal region (19), limbs (10), trunk (6), head and the iliac crest (3). Bacteremia was present in 22 patients. Overall, the germs isolated were Pseudomonas aeruginosa (34), Stenotrophomonas maltophilia (3) and Escherichia Coli (1); 31% of them were MDR. All patients received antibacterial treatment while surgery was performed in 24 patients (63.1%). Predisposing underlying conditions for EG were: severe neutropenia (97.3%), corticosteroid treatment (71%), iatrogenic diabetes (23.7%). All patients recovered, but EG recurred in 5 patients. Nine patients (24%) showed sequelae (deep scars, with muscle atrophy in 2). Four patients (10.5%) died, 1 due to relapse of EG with KPC co-infection, 3 due to the underlying disease. Conclusions. EG requires early recognition and a proper and timely treatment to obtain the recovery and to avoid larger necrotic evolution. The occurrence of scarring sequelae might affect the quality of life of patients.
MHD Casson nano fluid over a nonlinear penetrable elongated sheet with thermal radiat...
Seethamahalakshmi Vyakaranam
Venkata Ramana Reddy G

Seethamahalakshmi Vyakaranam

and 1 more

March 30, 2022
Consider a steady flow in two-dimensional of a viscous, incompressible Casson nano liquid over a nonlinear penetrable elongated sheet with radiation and chemical reaction. The Casson liquid rheological model is used to explain the non-Newtonian liquid attributes. Similarity variables are utilized to evaluate the governing flow model into set of nonlinear total differential equations. The outcomes of the flow equations were gotten by using Runge-Kutta alongside the shooting techniques. In other to explain the physics of the problem, impact of flow parameters are presented in graphs while computations on engineering curiosity are presented in table. Ahike in the Casson liquid term is observed to degenerate the fluid velocity alongside the momentum layer thickness. The impact of the imposed magnetic is felt by decreasing the velocity owning to the Lorentz force
Chemical Reactivity and Binding Interactions in RNA−Peptide Complexes
Ruby Srivastava

Ruby Srivastava

March 30, 2022
Abstract: The covalent and noncovalent backbone binding interactions in RNA-peptide complexes were studied by DFT methods. RNA1 (GGCUAGCC) structure has been selected for eight protonated peptides (GR, VR, DR, ER, KR, RR, NGR, tmeGnd) interactions based on an experimental study (Anal. Chem. 2019, 91, 1659−1664). Several DFT-based global reactivity descriptors are used to study the reactivity of eight peptides by chemical reactivity method. High hardness reflects high stability and low reactivity for the protonated peptides. DR, ER, GR, KR, RR, VR, NGR show lower value of ω, µ while tmegnd has high value of ω, µ. Larger HOMO-LUMO gap (7.29 eV) show greater structural stability for peptides. Autodock results indicated that RNA1 form hairpin structure while interacting with peptide complexes. (RNA1-RR) has higher binding energies and RNA1-ER complexes have lower binding energies. Autodock results showed strong noncovalent interaction as compared to the covalent RNA backbone bonds interactions, which is also seen by NCIPLOT and IGMPLOT plots. The reason for it might be due to the proton transfer from protonated ligand to deprotonated RNA which initiated loss of the ligand and proton transfer becomes energetically unfavourable in presence of additional hydrogen bonds as verified by the experimental results.
COVID-19 in a case of Toxic Epidermal Necrolysis
Mohammad Shahidi-Dadras
Shaghayegh Shahri-Gharahkoshan

Mohammad Shahidi-Dadras

and 5 more

March 30, 2022
The COVID-19 pandemic is a major health issue and patients with underlying conditions are more susceptible to catastrophic outcomes. Toxic epidermal necrolysis (TEN) is a severe systemic disease caused by immune system hypersensitive reaction. We present a case of TEN that later complicated with COVID-19,Deep Vein Thrombosis(DVT),Pulmonary Emboli(PE),and death.
Pelagic calcifiers face increased mortality and habitat loss with warming and ocean a...
Nina Bednarsek
Brendan Carter

Nina Bednarsek

and 9 more

March 30, 2022
Global change is impacting the oceans in an unprecedented way with resulting changes in species distributions or species loss. There is increasing evidence that multiple environmental stressors act together to constrain species habitat more than expected from single stressor. Here, we conducted a comprehensive study of the combined impact of ocean warming and acidification (OWA) on a global distribution of pteropods, ecologically important pelagic calcifiers and an indicator species for ocean change. We co-validated three different approaches to evaluate the impact of OWA on pteropod survival and distribution. First, we used co-located physical, chemical, and biological data from oceanographic cruises and regional time-series; second, we conducted multifactorial experimental incubations using OWA to evaluate survival; and third, we validated pteropod distributions using global carbonate chemistry and observation datasets. Habitat suitability indices and global distributions suggest that a multi-stressor framework is essential for understanding distributions of this pelagic calcifier.
Radiating and reacting MHD unsteady flow past an exponentially accelerated inclined p...
B. Prabhakar Reddy
Alfred Hugo

Prabhakar Reddy Bijjula

and 1 more

March 30, 2022
In this research paper, we numerically analyzed the effects of Soret and magnetic field on radiating and chemically reacting MHD unsteady free convective flow past an exponentially accelerated inclined permeable plate embedded in a saturated porous medium of uniform permeability with variable temperature and concentration numerically. The model's dimensionless coupled non-linear PDEs are solved numerically by using the finite difference method. The influence of key parameters on the velocity, temperature and concentration fields are discussed graphically whilst the numerical results of skin-friction, Nusselt and Sherwood numbers are exhibited in tabular form. The results obtained show that the permeability of the medium, thermal and mass buoyancy force improves the fluid velocity whilst the magnetic field and inclination angle have reverse effect. The fluid velocity and temperature decreases with an increment in radiation parameter whilst the reverse trend is observed in case of Nusselt number. The Soret effect is to elevate the fluid velocity and concentration whilst chemical reaction rate has reverse impact and these parameters have opposite effect on the Sherwood number. This flow model has various industrial applications in the field of food processing, polymer production, inclined surfaces in a seepage flow, design of fins, etc.
The characteristics and risk factors of asparaginase-associated pancreatitis in pedia...
Shu-Han Kuo
Jiann-Shiuh Chen

Shu-Han Kuo

and 6 more

March 30, 2022
Background: This study aimed to elucidate the characteristics and the risk factors for Asparaginase-associated pancreatitis (AAP) in children with acute lymphoblastic leukemia (ALL) under Taiwan Pediatric Oncology Group (TPOG)-ALL regimen. Methods: The retrospective hospital-based cohort study was conducted by reviewing the chart records of total 191 pediatric ALL patients aged 1-18 years treated with TPOG-ALL (2002 and 2013) protocols at the National Cheng Kung University Hospital, Tainan, Taiwan, from 2002 to 2019. The disease incidence, clinical presentations, laboratory data, complications, and outcomes of AAP were investigated. Results: The incidence of AAP among 191 ALL children was 4.7%. The incidence was significantly higher in children treated with the TPOG-ALL-2013 (n=62) than TPOG-ALL-2002 (n=129) protocol (11.3% vs. 1.6%, p= 0.006). Multivariate analysis identified using TPOG-ALL-2013 protocol was an independent risk factor for AAP. All of the 9 AAP cases had associated complications, such as systemic inflammatory response syndrome, thrombocytopenia, coagulopathy, liver dysfunction, hypoalbuminemia, jaundice, ascites, pleural effusion, hyperglycemia and hypertriglyceridemia. Pancreatic necrosis or pseudocysts developed in 7 (78%) patients. Notably, 1 (11%) AAP cases developed diabetes mellitus and 4 (44%) had chronic pancreatitis during a 1-year observational period. None were mortality. Conclusions: The incidence of AAP was 4.7% in ALL patients treated with TPOG-ALL protocol. Although a higher cumulative dose of Asparaginase in TPOG-ALL-2013 may attribute to the pancreatic toxicity, unidentified factors such as genetic predisposition still need further study.
From skirmishes to protracted battles: a bibliometric analysis about human beings and...
Ling Yue
Youjuan Fu

Ling Yue

and 9 more

March 30, 2022
Background: The coronavirus disease 2019 pandemic (COVID-19) has caused an unprecedented upsurge in the publication of scientific studies as the global community has collaborated to control the spread of the disease. Methods: We conducted a bibliometric analysis to evaluate the research trends and identify the core content based on publication output, the geographic distribution, collaborations and keywords. We searched for articles published from 1900 to June 30, 2020 based on the Science Citation Index Expanded (SCIE) and Social Sciences Citation Index (SSCI) in the Web of Science. Results: Our analysis revealed the following: (1) The number of publications clearly increased after the severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) outbreaks and sharply increased during the COVID-19 outbreak. Compared with SARS and MERS, COVID-19 generated a more dramatic and prolonged upsurge in publication. (2) Compared with SARS and MERS, COVID-19 had a more widespread and powerful effect on countries and territories, with a rapid onset. Countries and territories engaged in more international collaboration and communication to cope with the epidemics, and the COVID-19 pandemic led to marked increases in research advancements. (3) Based on the keywords, we found that multiple methods were used to address the COVID-19 pandemic that were based on biology, especially the immune response. Conclusions: Epidemics lead to an extreme acceleration and changes in research.
Preparation and developmental protocol for new biofilms process for protection qualit...
waseem ahmed

waseem ahmed

March 30, 2022
A study was planned to ensure the post-harvest quality of apple during storage periods through natural plant resources instead of using chemicals. Melia azedarach (Dharek) and Azadirachta indica (Neem) is well known as rich resources of bioactive compounds with antioxidants potential, used to maintain the quality of apple fruit and to avoid decay during storage periods. The pure compounds were isolated and used in films with the concentration of (30mg Ditriterpenoids and Secomeliacins films) and applied to apples, were purchased from the local market of Haripur Pakistan. The three main quality enzymes like superoxide dismutase (SOD), catalase (CAT), and proximate (POX,) were measured in stored fruits. Moreover, total phenolic compounds (TPC) and TA found retained during the storage period under (30 mg triterpenoids and Secomeliacins) film treatments. The HPLC-DAD analysis of stored fruits and fresh apple fruits showed the presence of five bioactive compounds with a minor variation for 9 days of storage periods. The phytochemical screening of treated fruits during the storage period showed the eight important bioactive compounds when compared with fresh fruits. It was concluded that new active films were helpful to used (Diterpenoids + Secomeliacins) are effective in maintaining the fruit quality during storage periods. The protocol and development of film’s with their engineering trails of thickness, water vapour permeability measurement in active films are discussed in the relevant section of this article to maintain the postharvest quality of apple fruits during storage periods as films are used in future green technologies in chemicals and food industry.
Differences in D-dimer Blood Concentration in Atrial Fibrillation Patients with Left...
changjian lin
Yangyang Bao

changjian lin

and 12 more

March 30, 2022
Background:  Severe left atrial spontaneous echo contrast (SLASEC) is considered the prior stage to thrombosis. Studies have suggested an effect of D-dimer blood concentration on exclusion of left atrial thrombus (LAT), but it remains unclear whether D-dimer concentrations differ between atrial fibrillation (AF) patients with SLASEC or LAT. Methods: Nonvalvular AF patients scheduled to undergo catheter ablation or cardioversion between January 2017 and July 2020 were screened for this prospective study. All patients underwent transesophageal echocardiography (TEE) to detect SLASEC or LAT.  Results: 35 patients with SLASEC and 22 patients with LAT were detected. D-dimer concentration and CHA 2 DS 2 -VASc score were significantly lower in the SLASEC group compared with the LAT group (D-dimer: 0.26±0.13 vs. 0.87±0.9 mg/L, P<0.001; CHA 2 DS 2 -VASc score: 2.3±0.9 vs. 3.1±1.5, P =0.02). The cut-off value for D-dimer concentration (0.285 mg/L) had sensitivity of 77.3% and specificity of 80.0% for prediction of LAT. D-dimer concentration showed a decreasing trend with a significant difference  after complete thrombus resolution in the LAT group by anticoagulation treatment. No ischemic stroke, or systemic thromboembolism events occurred in the SLASEC group during the 6-month follow-up. Conclusions: This study demonstrated a significantly lower D-dimer concentration and CHA2DS2 -VASc score in AF patients with SLASEC than in those with LAT. The D-dimer cut-off value (0.285 mg/L) can be used as an effective reference index to distinguish the pre-thrombotic state of LAT from LAT. D-dimer blood concentration may be a predictor of LAT thrombolysis.
Pre-screwing Electrocardiographic Characteristics in Guiding Electrode Implantation D...
Shan Zhuo
Long Jiang

Shan Zhuo

and 8 more

March 30, 2022
This study analyzed the characteristics of electrocardiograms recorded before electrode screwing and at the site of lead fixation during LBBP. The study aims to establish an electrocardiographic vector-guided method for electrode implantation during LBBP. Methods: 140 patients who underwent successful LBBP and had ECGs recorded before electrode screwing (pre-screwing) and at the site of lead fixation (post-implantation) were included in the study. Patients whose post-implantation ECGs revealed rSR’ or M morphologies in lead V1 were enrolled in the typical right bundle branch (RBBB) group, and those whose ECGs revealed qR, QR, Qr or QS morphologies in V1 were enrolled in the atypical RBBB group. Electrocardiographic characteristics of pre-screwing and post-implantation ECGs were thoroughly analyzed. Results: For the electrocardiograms of typical RBBB group, pre-screwing R-wave amplitudes in lead I, aVL, V4, and V5 were 0.6635 (0.433,0.866), 0.69 (0.487,0.866), 0.6635 (0.514,1.489), and 1.056 (0.677,1.840)mv, respectively; post-implantation QRS transition zone was 1 (0.5,3), and Stim-LVAT was 68 (61,74)ms. For the atypical RBBB group, pre-screwing R-wave amplitudes in lead I, aVL, V4 and V5 were 0.527 (0.379,0.704), 0.5285 (0.2985,0.785), 0.5545 (0.2165,1.11), and 0.8525 (0.4737,1.42), respectively; post-implantation QRS transition zone was 2 (1,3), and Stim-LVAT was 76 (65,81)ms. The between-group difference were statistically significant for all the parameters. Conclusion: In pre-screwing electrocardiograms, R-wave amplitude ≥0.35mV in aVL is a highly sensitive indicator for predicting typical RBBB morphologies in left bundle branch pacing, and R-wave amplitude≥0.7mV in lead I is an indicator with high specificity.
Quantum Mathematical Integrated Information Theory: From the Classical Version
Siddharth Sharma

Siddharth Sharma

March 30, 2022
This paper is an attempt to give a Quantum theory of Mathematical integrated information theory which is mathematical version of integrated information theory by Masafumi Oizumi, Larissa Albantakis, Giulio Tononi [2]. Using the definitions of Classical Mathematical Integrated Information Theory [1]. And considering that the Quantum theory is given by the functor which maps from a category whose objects is topology to a linear category whose objects are Hilbert spaces indexed with the objects from previous category. Also, we will be using the definition of conditional density matrix to define repertoire. We will be also discussing the relationship between consciousness and entanglement.
Ewing sarcoma of the 9th rib subsequent to pediatric leukemia: a case series
Julia Vandenheuvel
Leighton  Elliott

Julia Vandenheuvel

and 4 more

March 30, 2022
Ewing sarcoma is an aggressive malignancy of bone and soft tissue that accounts for approximately 2% of cases of childhood cancer. It has been rarely reported as a secondary neoplasm. Data from the Childhood Cancer Survivor Study has evaluated secondary sarcomas in 5-year survivors of childhood cancer. We report two pediatric patients in northeast Pennsylvania, who developed secondary Ewing Sarcoma of the 9th rib within 5 years of primary childhood leukemia diagnoses.
Extra-Renal Wilms’ Tumour: Diagnostic challange in pediatric oncology
İlknur Cesur
Özgür  Külahçı

İlknur Cesur

and 2 more

March 30, 2022
Extrarenal Wilms tumors (ERWT) are extremely rare with only isolated case reports in the pediatric literature. As there are no specific radiological findings suggesting ERWT, it is difficult to diagnose ERWT accuaretely without pathological description. We present two cases who presented with large retroperitoneal masses. Wilms tumor was not considered in differential diagnosis as the masses were located outside the kidney. An emphasize on ERWT’s clinical and surgical findings and differential diagnosis were made in this report.
Modeling epidemics by means of the stochastic description of complex systems
Bruno Carbonaro

Bruno Carbonaro

March 30, 2022
The aim of the present paper is to show a way in which the problem of predicting the evolution of an epidemic may be tackled by describing it in the framework of Boltzmann’s kinetic theory, as it has been developed and applied in the last years to complex systems by a suitable modification of the Boltzmann equation, a suitable re-interpretation of state variables and the introduction of the notion of «functional subsystems». Accordingly, in this paper we model an arbitrary (national) population S as a complex system, split in two functional subsystems, the first containing all single individuals of S and the second containing the «care tools», that are to be meant as available places in hospitals with a sufficient number of physicians and of equipments for intensive cares. The state variable on the first subsystem will be the «health state», and the state variable on the other will be the «effectiveness». We shall then write a system of non-linear ordinary differential equations which gives the evolution of the probability distribution on the set of possible values of the health states. By assigning data partly on the basis of plausibility assumption and partly as estimated from those furnished by institutions of Campania region, the system takes a form allowing the numerical simulation of such evolution, which will be performed and presented in a forthcoming paper.
CBX4 regulates long-form thymic stromal lymphopoietin-mediated airway inflammation th...
changhui yu
shixiu liang

changhui yu

and 9 more

March 30, 2022
Abstract Background: Thymic stromal lymphopoietin (TSLP) is present in two distinct isoforms, short-form (sfTSLP) and long-form (lfTSLP). lfTSLP promotes inflammation while sfTSLP inhibits inflammation in allergic asthma. However, little is known about the regulation of lfTSLP and sfTSLP during allergic attack in asthma airway epithelium. Methods and Results: Here, we report that SUMOylation was enhanced in HDM-induced allergic asthma airway epithelium. Inhibition of SUMOylation significantly alleviated airway Th2 inflammation and lfTSLP expression. Mechanistically, CBX4, a SUMOylation E3 ligase, enhanced lfTSLP, but not sfTSLP, mRNA translation through the RNA binding protein, MEX-3B. MEX-3B promoted lfTSLP translation through binding of its KH domains to the lfTSLP mRNA. Furthermore, CBX4 regulated MEX-3B transcription in HBE through enhancing SUMOylation levels of the transcription factor, TFII-I. Conclusion: We demonstrate an important mechanism whereby CBX4 promotes MEX-3B transcription through enhancing TFII-I SUMOylation, and MEX-3B enhances the expression of lfTSLP through binding to the lfTSLP mRNA and promoting its translation. Our findings uncover a novel target of CBX4 for therapeutic agents to lfTSLP-mediated asthma.
← Previous 1 2 … 1901 1902 1903 1904 1905 1906 1907 1908 1909 … 2754 2755 Next →

| Powered by Authorea.com

  • Home