bluuebunny/crossref_metadata_2025_split huggingface dataset:
Regulation of the macrolide resistance ABC-F translation factor MsrD
Authors: Fostier Corentin , Ousalem Fares , Leroy Elodie , Ngo Saravuth , Soufari Heddy , Innis Axel , Hashem Yaser , Boël Gregory 
Published: September 2022

Abstract
Antibiotic resistance ABC-Fs (ARE ABC-Fs) are translation factors currently proliferating among human pathogens that provide resistance against clinically important ribosome-targeting antibiotics. Here, we combine genetic and structural approaches to determine the regulation of streptococcal ARE ABC-F gene msrD in response to macrolide exposure and also demonstrate that MsrD twin-ATPase sites work asymmetrically to mediate the dynamic of MsrD interaction with the ribosome. We show that cladinose-containing macrolides lead to insertion of MsrDL leader peptide into an undocumented conserved crevice of the ribosomal exit tunnel concomitantly with 23S rRNA rearrangements that prevent peptide bond formation and preclude accommodation of release factors. The stalled ribosome obstructs formation of a Rho-independent terminator which prevents msrD transcriptional attenuation. This stalled ribosome is rescued by MsrD, but not by MsrD mutants which do not provide antibiotic resistance, showing evidence of equivalence between MsrD function in antibiotic resistance and its action on this complex.
The construction and analysis of m6A-related ceRNA network and patterns of immune infiltration in calcified aortic valve disease
Authors: Dai Feng , Xu XianZhi , Liao GeGe , Tian ZhaoXuan , Shi XiangXiang , Xuan HaoChen , Wang ChaoFan , Li XiaoQun , Wang LiLi , Li DongYe , Chen JunHong , Xu TongDa 
Published: September 2022

Abstract
Background
Despite being the most prevalent valve heart disease among the elderly, calcified aortic valve disease (CAVD) is not adequately addressed based on its current mechanisms. N6-methyladenosine (m6A) modification is increasingly being studied in cardiovascular disease. Nonetheless, the biological role of m6A in CAVD remains to be determined.
Methods
We obtained the differentially expressed m6A based on difference analysis, and identified the target genes regulated by key m6A through co-expression analysis and m6A2Target database. The enrichment analysis of targeted genes was performed via Metascape. Immunocyte infiltration analysis was performed by R-package. The tools such as miRDB, Targetscan, miRTarBase, and Cytoscape were applied for the construction of competitive endogenous RNAs (ceRNAs) network. Quantitative real-time PCR (qRT-PCR) was utilized to verify whether the expression of components in the ceRNA network is consistent with the public database.
Results
The ceRNA network consists of one m6a (KIAA1429), one mRNA (ZC3H12C), three miRNAs (miR-17-5p, miR-20b-5p and miR-137), and two lncRNAs (HCG11 and PRICKLE2-AS3). KIAA1429 is a down-regulated methyltransferase in CAVD. The genes modified by KIAA1429 were primarily enriched in the metabolic process of RNA, viral process, and immune system process et al. There was a rising infiltration of macrophages m0, and a decreasing infiltration of macrophages m2, dendritic cells resting in CAVD. KIAA1429 was negatively correlated with macrophages m0 and positively correlated with macrophages m2. KIAA1429(m6a), ZC3H12C (mRNA), and HCG11(lncRNA) showed lower expression levels in CAVD than those in normal tissue, whereas miR-17-5p, miR-20b-5p (miRNA) showed higher expression levels.
Conclusion
Potential pathways associated with KIAA1429 in CAVD were identified, in which ZC3H12C and miR-20b-5p might participate in CAVD progression via the nuclear factor kappa-B (NF-κB) pathway.
A novel mineral composition increases soybean crop yield by mitigating stress induced from ultraviolet-A and -B radiation
Authors: Abreu André L. , Gratão Priscila L. , Rodriguez Carlos A.V. , Junior Gilmar S. Sousa 
Published: September 2022

Abstract
Ultraviolet radiation (UVR) is an important environmental abiotic stress which affects yield potential of agricultural crops, and few practical solutions are available for protecting large scale field cultivation from it. The present study assessed the protective effect of a novel mineral composition principally based upon microparticles of crystal and insoluble quartz sand applied over the top of plants, to mitigate the stress effects of UV-A or UV-B radiation. Soybean (Glycine max (L.) Merrill) plants were cultivated under three alternative UVR exposure scenarios (No UV, +UV-A, +UV-B) to compare Treated and Untreated plants with that composition. Measurements of malondialdehyde acid (MDA) and proline content demonstrated the effects of + UV-A and + UV-B on plants and the effectiveness of the foliar treatment to mitigate the stress. Biometric assessment showed that root weight, foliar biomass, and number of pods of Untreated plant were negatively impacted by both + UV-A and + UV-B, whereas in Treated plants the damages for both + UV-A and + UV-B were almost entirely mitigated. The results of this study endorse the use of a promising tool for growers to achieve sustainable yield in soybeans and potentially other field crops in the face of increasing challenges due to climate change.
Pharmacophore based virtual screening for identification of effective inhibitors to compact HPV 16 E6 a triggered cervical cancer
Authors: Mohan Anbuselvam , Schwenk Gregory , Jeeva Anbuselvam , Feng Eric , Ji Hai-Feng 
Published: September 2022

Abstract
Cervical cancer, one of the most common causes of cancer-related death among women in the world, has been linked to the presence of a particular oncoprotein that is predominantly transferred through sexual contact with an infected host. In 90% of cervical cancer deaths, a correlation has been found with the expression of the viral genome of HPV16 E6. As a result, HPV16 E6 has emerged as an optimistic therapeutic drug target for the treatment of cervical cancer. In order to develop a drug that is capable of disturbing the genome expression activity of HPV16 E6, it is imperative to identify the key chemical features of its known inhibitors. In this study, we present an investigationon identifying potential inhibitors of HPV16 E6 by utilizing pharmacophore-based virtual screening, molecular docking, ADME prediction, and molecular dynamics simulation. In the initial stage, we generated a ligand-based pharmacophore model based on the features of four known HPV16 E6 inhibitors (CA24, CA25, CA26, and CA27)via the PHASE module implanted in the Schrödinger suite. We constructedfour-point pharmacophore features, which consists of three hydrogen bond acceptors (A) and one aromatic ring (R). The common pharmacophore features further employed as a query for virtual screening against the ASINEX database via the Schrödinger suite. The pharmacophore-based virtual screening filtered out top 2000 hits, based on the fitness score. We applied the molecular docking studies for further compound filtration using Glide which provide three ligand filtering phases, namely HTVS, SP, XP. Initially, 1000 compounds were obtained from HTVS docking. Based on the glide score, they were further filtered to 500 hits by employing docking in standard precision mode. Finally, the best four hits were identified using docking in XP mode. The four compounds were then further subjected to ADME profile prediction by engaging the Qikprop module. The ADME properties of the four fell within a satisfactory range and the compounds exhibited anticipated pharmacokinetic properties. These compounds were further investigated to determine the binding stability of the protein-ligand complex at a different time scale (100 ns) by using the desmond package for a molecular dynamics simulation. These molecular dynamics simulation studies revealed that theCYS 51 and GLN 107 proteins are residues of HPV 16 E6 binding sites, and the root mean square deviation (RMSD) and root mean square fluctuations (RMSF) values for these residues were also found to be within satisfactory ranges and suggest a crucial role in enhancing the stability of the protein-ligand complex during the simulation. From these computational investigations, we concluded that the four potential compounds are appropriate for further study, and potential clinical investigation, as HPV16 E6 inhibitors.
Controlling Nutritional Status (CONUT) score as a prognostic marker for gastrointestinal stromal tumors
Authors: Sui Chao , Lin Chen , Tao Tingting , Guan Wenxian , Zhang Haoran , Yu Heng , Tao Liang , Wang Meng , Wang Feng 
Published: September 2022

Abstract
Background: The Controlling Nutritional Status (CONUT) score, regarded as the effective indicator of patient nutrition, has been demonstrated to be related to prognosis of numerous tumors. Nevertheless, the significance of CONUT for gastrointestinal stromal tumor (GIST) remains unclear. This study intended to clarify the association between CONUT and the prognosis of GISTs.Methods: 355 patients with GISTs undergoing surgical resection at our center were retrospectively assessed. Receiver operating characteristic curve analysis was used to help determine the cut-off value of CONUT score. Relapse-free survival (RFS) and overall survival (OS) were assessed by Kaplan–Meier curve analysis. Prognostic factors for RFS and OS were examined by Cox proportional hazards models.Results: A total of 355 patients were enrolled in this study. Areas under the curve (AUC) were 0.638 for CONUT score, and the cut-off value of CONUT was shown to be three. Kaplan-Meier curve analysis showed that high CONUT score was linked to poorer RFS and OS. Univariate and multivariate analyses ultimately revealed that CONUT was a risk factor for RFS and OS, independent of demographics and clinicopathological tumor characteristics.Conclusions: CONUT score was an effective and novel predictor for prognosis of GIST patients treated with surgery, indicating its potential as a prognostic marker in the overall management.
An Error Identification and Compensation Method for Cartesian 3D Printer Based on Specially-Designed Test Artifact
Authors: Li Tian-Jian , Li Jungang , Ding Xiaohong , Sun Xizhi , Wu Tao 
Published: September 2022

Abstract
The printing accuracy is one of the most important metrics to evaluate the additive manufacturing (AM) machine. In this paper, an error identification and compensation method for Cartesian 3D printer is presented based on a specially-designed test artifact to improve printing accuracy. The relationship between the geometric errors of the printed object and the kinematic errors of the printer axes is established based on the theory of the multi-body system. A series of formulas are derived to separate the kinematic errors of each axis from the geometric errors. To extract the geometric errors required for the mathematical calculations, an artifact with the special features is proposed and printed. The geometric errors of the characteristic points on the artifact is measured by a coordinate measuring machine (CMM). From the measured geometric errors, kinematic errors of the printer can be identified, and can be further compensated by adjusting the CAD model of the object. Two compensated algorithms are established; one uses the fitted curves of the kinematic errors, and the other uses the average kinematic error values. Printing tests and case studies are performed to verify the effectiveness of the proposed method. The results show that the proposed method can improve printing accuracy of the Cartesian 3D printer.
Dynamic 18F-Pretomanid PET imaging reveals excellent brain penetration in animal models of TB meningitis and first-in-human studies
Authors: Mota Filipa , Ruiz-Bedoya Camilo , Tucker Elizabeth , Holt Daniel , De Jesus Patricia , Lodge Martin , Erice Clara , Chen Xueyi , Bahr Melissa , Flavahan Kelly , Kim John , Brosnan Mary Katherine , Ordonez Alvaro , Peloquin Charles , Dannals Robert , Jain Sanjay 
Published: September 2022

Abstract
Pretomanid is a nitroimidazole antimicrobial with potent activity against drug-resistant Mycobacterium tuberculosis and approved in combination with bedaquiline and linezolid (BPaL) for the treatment of multidrug-resistant (MDR) pulmonary tuberculosis (TB). However, the penetration of pretomanid into privileged sites such as the brain, as well as the efficacy of the BPaL regimen for TB meningitis, remain unknown. Importantly, there are no well accepted treatments for TB meningitis due to MDR strains, resulting in high mortality. We developed a new synthetic route to obtain 18F-pretomanid (chemically identical to the parent antibiotic) and performed cross-species positron emission tomography (PET) imaging to noninvasively measure intralesional pretomanid concentration-time profiles in the central nervous system (CNS). Dynamic PET in mouse and rabbit models of TB meningitis demonstrated excellent CNS penetration of pretomanid. Antibiotic levels were spatially compartmentalized and cerebrospinal fluid (CSF) levels did not correlate with those in the brain parenchyma. Post-mortem autoradiography and mass spectrometry corroborated the imaging findings. The bactericidal activity of the BPaL regimen in the mouse model of TB meningitis was substantially inferior to the standard TB regimen, likely due to restricted penetration of bedaquiline and linezolid into the brain parenchyma. Finally, first-in-human dynamic 18F-pretomanid PET in six healthy volunteers demonstrated excellent penetration of pretomanid into the CNS, with significantly higher levels in the brain parenchyma versus CSF (P < 0.01). These data have important implications for developing new antibiotic treatments for TB meningitis.
Creation of a Favorable Antitumor Microenvironment by the Anti-Complement Factor H Antibody GT103
Authors: Saxena Ruchi , Bushey Ryan , Campa Michael , Gottlin Elizabeth , Guo Jian , Patz Edward , He You-Wen 
Published: September 2022

Abstract
Complement factor H (CFH) is an abundant serum protein regulating complement activation and protecting host cells from attack by the alternative pathway of complement mediated cytotoxicity. We previously identified an anti-CFH autoantibody in early stage NSCLC patients, and cloned from single peripheral B cells a lead therapeutic mAb, GT103, for cancer immunotherapy. Although GT103 has potent antitumor activities, the underlying antitumor mechanisms remain unknown. Herein we investigated GT103-mediated antitumor effects and demonstrate that GT103 enhances antitumor immunity through multiple pathways. GT103 treatment creates a favorable tumor microenvironment (TME) by decreasing immunosuppressive regulatory T cells and myeloid-derived suppressor cells and enhancing antigen-specific effector T cells and has a synergistic antitumor effect with anti-PD-L1 mAb. Furthermore, the immune landscape of tumors from early stage patients expressing the anti-CFH autoantibody is associated with an immunologically active TME. Our results provide novel mechanistic insights into this promising human-derived immunotherapeutic agent, which is currently undergoing a Phase I/II clinical trial in patients with NSCLC.
Chemical impacts of wildfire smoke on stratospheric chlorine and ozone depletion
Authors: Solomon Susan , Stone Kane , Yu Pengfei , Murphy Daniel , Kinnison Doug , Ravishankara A. R. , Wang Peidong 
Published: September 2022

Abstract
Extremes in stratospheric abundances of HCl (record low), ClONO2 (record high), and ozone (record low) were observed over southern hemisphere mid-latitudes following the 2020 Australian wildfires by satellite records spanning 15–20 years. These unprecedented changes suggest that wildfire aerosols pose a challenge to stratospheric chlorine and ozone depletion chemistry. Here we propose a wildfire smoke chemical mechanism linking data from the field and the laboratory, and test it by comparison of these extraordinary observations to model simulations. Aged wildfire aerosols likely contain a mix of oxidized organics. Laboratory data indicate that HCl is extremely soluble in such species at relatively warm stratospheric temperatures in mid-latitudes and Antarctic autumn. We find that the HCl solubility in oxidized organics, and associated enhancements in heterogeneous reaction rates in/on the aerosols, yield remarkable modelled changes in 2020 HCl, ClONO2, and HOCl abundances, in good agreement with observations. Our results indicate that wildfire smoke does not explain the record duration of the 2020 Antarctic ozone hole, but does yield an increase in its area, as well as 3-5% depletion of southern mid-latitude total column ozone. These findings increase concern that more frequent and intense wildfires could delay ozone recovery in a warming world.
Is there a role for magnetic resonance imaging for assessing anal pain in patients with monkeypox?
Authors: Ferreira Marcus Vinicius SIlva , Brunelli Julia Martins , Ferreira Felipe Ribeiro , Ramos Jessica Fernandes , Araujo-Filho Jose Arimateia Batista , Horvat Natally 
Published: September 2022

Abstract
30 years-old man with no skin lesions at physical exam, referred severe anal pain for 4 days. Rectal swab was positive for Monkeypox, and proctitis was diagnosed, with anorectal abscesses only characterized in magnetic resonance imaging. This is the first description of clinical and imaging presentation of anorectal disease related to Monkeypox virus infection in an unusual presentation without the typical cutaneous rash and presenting complicated anorectal abscesses.
Preparation of Fe3O4 -HNTs-polypyrrole nanocomposite for efficient adsorption of Cu(II) and Cd(II) from aqueous solution
Authors: Rouhi Mojtaba , Babamoradi Mohsen , Maleki Sajjad Tabar , Hajizadeh Zoleikha , Maleki Ali 
Published: September 2022

AbstractEasy synthesis of Fe3O4-HNTs-polypyrrole (FHP) nanocomposite was performed by in situ polymerization on the synthesized Fe3O4-HNTS by co-precipitation method. The adsorption properties of the nanocomposites for the heavy metal removal (Cu(II) and Cd(II)) were investigated. It was found that the adsorption efficiency percentage for Cd(II) and Cu(II) by 30 mg of adsorbent in 60 min was 77.2% and 82.8%, respectively. Also, the maximum adsorption capacity for Cu(II) and Cd(II) is 74.7 mg/g and 66.3 mg/g, respectively. Adsorption parameters such as contact time, solution concentration, adsorbent dosage, and pH were also studied. The adsorption was investigated by the Langmuir and Freundlich isotherms as well as pseudo-first-order and pseudo-second-order kinetic models. SEM images show the surface morphology of the sample, its surface porosity, and the approximate size of the nanoparticles. FTIR, BET, VSM, and TGA analyses were used to investigate the magnetic and physical properties of the nanocomposite.
Firm growth in times of crisis
Authors: Yergabulova Aigerim 
Published: September 2022

Abstract
We use the full population of Belgian firms to examine the unequal impact of Covid-19 on firm growth. In doing so, we compare whether the response of firms to Covid-19 is different from the Great Recession of 2008. We find a significant decline in net employment growth during the first and second quarter of 2020, with an average loss of 4 and 19 percent in aggregate employment, respectively. We show that the aggregate picture masks significant heterogeneity among firms and that the Covid-19 crisis is different than the Great Recession. While small and medium-sized firms performed relatively well during the 2008 crisis, during the 2020 pandemic crisis they were hit harder compared to large firms. We find that the difference stems from the industry-specific effects of the shocks and the nature of the crises. Finally, consistent with the existing literature, we show that small firms tend to be low-wage firms and that low-wage firms are more cyclically sensitive to business cycles.JEL Codes: D22, E24, E32, L25
Nonlinear Stefan problem for one-phase generalized heat equation with heat flux and convective boundary condition
Authors: Nauryz Targyn 
Published: September 2022

Abstract
In this article we consider a mathematical model of an initial stage of closure electrical contact that involves a metallic vaporization after instantaneous exploding of contact due to arc ignition with power P0 on fixed face z = 0 and heat transfer in material with a variable cross section, when the radial component of the temperature gradient can be neglected in comparison with the axial component with heat flux and convective boundary conditions prescribed at the known free boundary z = α(t). The temperature field in the liquid region of such kind of material can be modelled by Stefan problem for the generalized heat equation. A similarity variable transformation is used to solve the problem, which enables us to reduce generalized heat equation to nonlinear ordinary differential equation and we have to determine temperature solution for the liquid phase and location of melting isotherm. Existence and uniqueness of the solution is proved by using the fixed point Banach theorem. The solution for two cases of thermal coefficients, in particular, constant and linear thermal conductivity are represented, existence and uniqueness for each type of solution is proved.Mathematics Subject Classification (2010). 80A22, 80A05.
Is Helicobacter pylori infection the risk factor of metabolic associated fatty liver disease：A cross-sectional study
Authors: Zeng Yicheng , Jing Xubin , Wu Chaofen , Xie Yanchun , Chen Lingzi , Chen Yun , Li Haopeng , Hong Danmian , Cai Xianbin 
Published: September 2022

Abstract
Background: Recently, with new diagnosis criteria, metabolic associated fatty liver disease (MAFLD) was introduced to replace the diagnosis of nonalcoholic fatty liver disease (NAFLD). Considering that there weren’t sufficient studies on MAFLD in China, we aimed to explore the relationship between MAFLD and H. pylori infection, as well as the potential risk factors of MAFLD.Methods: In this cross-sectional study, 3449 subjects were enrolled from a Hospital Health Management Center of Shantou in China between July 2020 and October 2021. All participants included had underwent blood test, 13C urea breath test (13C-UBT) and abdominal ultrasound examination. The association between H. pylori infection and MAFLD were analyzed using logistic regression. Machine learning approach were applied to explore independent risk factors of MAFLD.Results: The overall prevalence of MAFLD was 39.4% in our study population. Of a total of 3449 participants, MAFLD was diagnosed in 1043 of 2254 males (46.3%) and 315 of 1195 females (26.4%). The prevalence of MAFLD increased with age and peaked at the 60-69-year age group (overall participants: 58.8%; male: 56.2%; female: 64.0%), and then declined slightly in the 70-above-year age group. The result of multivariable logistic regression revealed that H. pylori infection was not significantly correlated with MAFLD. Using logistic regression and LASSO regression, we identified age, overweight/obesity, T2DM, hypertension, UA, TG, HDL and ALT as independent risk factors of MAFLD.Conclusions: The prevalence of MAFLD in Shantou of south China was relatively high, and the prevalence was higher in males than in females. Our results showed that H. pylori infection wasn’t associated with the risk of MAFLD, when age, overweight/obesity, T2DM, hypertension, UA, TG, HDL and ALT were independent risk factors of MAFLD.