bluuebunny/crossref_metadata_2025 huggingface dataset:
The Binding Mechanism of Coronavirus Disease 2019 with Human Angiotensin Converting Enzyme 2
Authors: Lone Baliram , Lone Megha
Published: May 2020

The outbreak across the globe due to coronavirus disease 2019 (COVID-19) has spread abruptly by infected humans worldwide. The continuous efforts by scientists is on way to understand how pandemic of COVID-19 resembles and differs from serve acute respiratory syndrome coronavirus (SARS-CoV) at transcriptomic and genomic level. The SARS-CoV and COVID-19 exploits the angiotensin converting enzyme 2 (ACE2) receptor to gain entry inside the cells.We analyzed the entry COVID-19 into host cell due to receptor binding domain (RBD) of spike glycoprotein. The proposed simulation data shows similar ternary structures from two viruses shares approximately 80 percent identity in amino acid sequences. Our molecular modeling investigation signifies that angiotensin converting enzyme 2 (ACE2) has stronger interaction with COVID -19 RBD. The Amino acid phenylaniline F486 LOOP plays vital role due to its penetration into hydrophobic pocket in ACE2.The said investigation of S-Glycoprotein RBD of COVID-19 or SARS-CoV-2 via ACE2 provides post genome analysis of protein-protein interaction for rapid assessing transmission of infected patients by deadly CoVID-19. The scientific data extracted implies early guidance to control and viral prevention of CoVID-19.
Added Value of Chest CT in Suspected COVID-19: An Analysis of 239 Patients
Authors: Korevaar Daniel A. , Kootte Ruud S. , Smits Loek P. , van den Aardweg Joost G. , Bonta Peter I. , Schinkel Janke , Vigeveno Rene M. , van den Berk Inge A.H. , Scheerder Maeke J. , Lemkes Bregtje A. , Goorhuis Abraham , Beenen Ludo F.M. , Annema Jouke T.
Published: May 2020

Introduction: Clinicians have been struggling with the optimal diagnostic approach of patients with suspected COVID-19. We evaluated the added value of chest CT over RT-PCR alone. Methods: Consecutive adult patients with suspected COVID-19 presenting to the emergency department (Academic Medical Center, Amsterdam University Medical Centers, the Netherlands) from March 16th to April 16th were retrospectively included if they required hospital admission and underwent chest CT and RT-PCR testing for SARS-CoV-2 infection. The CO-RADS classification was used to assess the radiological probability of COVID-19, where a score of 1-2 was considered as negative, 3 as indeterminate, and 4-5 as positive. CT results were stratified by initial RT-PCR results. For patients with a negative RT-PCR but a positive CT, serology or multidisciplinary discussion after clinical follow-up constituted the final diagnosis. Results: 258 patients with suspected COVID-19 were admitted, of which 239 were included because they had both CT and RT-PCR testing upon admission. Overall, 112 patients (46.9%) had a positive initial RT-PCR, and 14 (5.9%) had a positive repeat RT-PCR. Of 127 patients with a negative or indeterminate initial RT-PCR, 38 (29.9% [95%CI 21.3-39.3%]) had a positive CT. Of these, 13 had a positive RT-PCR upon repeat testing, and 5 had positive serology. The remaining 20 patients were assessed in a multidisciplinary consensus meeting, and for 13 it was concluded that COVID-19 was ‘very likely’. Of 112 patients with a positive initial RT-PCR result, CT was positive in 104 (92.9% [95%CI 89.3-97.5%]). Conclusion: In a high-prevalence emergency department setting, chest CT showed high probability of COVID-19 (CO-RADS 4-5) in 29.9% of patients with a negative or indeterminate initial RT-PCR result. As the majority of these patients had proven or ‘very likely’ COVID-19 after follow-up, we believe that CT helps in the identification of patients who should be admitted in isolation.
Coproducción e Incidencia de la Sociedad Civil en la Política de Residuos Sólidos en Belém, Amazonia
Authors: Nebot Carmen Pineda , De Andrade Herbert Cristhiano Pinheiro , Sobrinho Mário Vasconcellos , Vasconcellos Ana María de Albuquerque
Published: May 2020

El artículo analiza la coproducción en la implementación de políticas públicas. Examina, en concreto, el proceso de coproducción entre la sociedad civil y el gobierno municipal en la elaboración de un plan de gestión de residuos sólidos en el municipio de Belem, en la Amazonia Brasileña. El trabajo analiza cinco categorías del proceso de coproducción: actores sociales; movilización social; espacio público; acuerdos coproductivos; y descentralización del Estado. La investigación está basada en el método cualitativo de análisis y los datos fueron obtenidos por medio de documentos, entrevistas semiestructuradas y observación participante y no participante. El articulo muestra que el proceso de coproducción comenzó a partir de la creación de un espacio público de prestación de cuentas y para el análisis de indicadores de implementación de políticas públicas. Este espacio público llamado  Red Social Nossa Belém  abrió posibilidades para que la sociedad civil pudiera incidir en la planificación del servicio público. Especialmente, la Red Social Nossa Belém generó acuerdos coproductivos para la inclusión de los catadores de residuos sólidos en el proceso de descentralización del gobierno.
Did we take physical therapy serious after ESWL and retrograde intrarenal surgery
Authors: Peng Linjie , Wen Junjun , Zeng Guohua , Zhong Wen
Published: May 2020

Background: Physical therapy, including percussion, inversion, vibration and combinations, was clinically administrated to improve the stone-free rate (SFR). The present study aimed to investigate the role of physical after ESWL and retrograde intrarenal surgery (RIRS).Methods: Systematic review of literature from PubMed, Scopus, Cochrane library and Embase which focused on physical therapy after ESWL and RIRS was administrated, meta-analysis was performed, SFR and complications was investigated.Results: A total of 8 prospective studies with 1065 patients were enrolled, including 7 randomized control trials and 1 prospective study. 1 study was designed on RIRS and the rest 7 studies were on ESWL. Compared to observation group, physical therapy provided a higher SFR (OR= 3.38, 95% CI: 2.45-4.66, p< 0.0001) at any time point (week1, week2 and month1), especially the SFR in lower calyceal stone (OR: 3.51; 95%CI: 2.21-5.55; p<0.0001) and upper ureteral stone (OR:2.79; 95%CI:1.62-4.81; p=0.0002). In subgroup analysis, EPVL (external physical vibration lithecbole, OR:3.47; 95%CI:2.24-5.37; p<0.0001) and PDI (percussion, diuresis and inversion, OR:3.24; 95%CI:2.01-5.21; p<0.0001) were both effective. Complications such as hematuria, lumbago, dizziness and urinary tract infection were all comparable (OR: 0.84; 95% CI: 0.62-1.13; p = 0.237). Conclusions: Physical therapy was effective and safe in increasing the SFR after ESWL and RIRS without significant side effects, especially for lower calyceal stone and upper ureteral or renal pelvic stone. A consistent protocol for physical therapy after lithotripsy was needed to be built, which would promote a better final stone-free. And the role of drinking enough water, furosemide and tamsulosin in physical therapy required further test. Review Registration: PROSPERO 2019 CRD42019130228.
Contribution to understanding the evolution of holometaboly: Transformation of internal head structures during the metamorphosis in the green lacewing Chrysopa pallens (Neuroptera: Chrysopidae)
Authors: Zhao Chenjing , Ang Yuchen , Wang Mengqing , Gao Caixia , Zhang Kuiyan , Tang Chufei , Liu Xingyue , Li Min , Yang Ding , Meier Rudolf
Published: May 2020

Background：Metamorphosis remains one of the most complicated and poorly understood processes in insects. This is particularly so for the very dynamic transformations that take place within the pupal sheath of holometabolous insects. Only few studies address these transformations especially with regard to cranial structures of those holometabolous species where the larval and adult forms have a similar diet. It thus remains unclear to what extent the internal structures undergo histolysis and rebuilding. Here, the development of the brain and skeleto-muscular system of the head of Chrysopa pallens (Rambur, 1838) is studied. This species is a predator of aphids in the larval and adult stage.Results：We used micro-computed-tomography (µ-CT) to study the transformations of the larval, prepupal and pupal head within the cocoon. We first assessed the morphological differences and similarities between the stages. We then determined the point in time when the compound eyes appear and describe the re-orientation of the head capsule which transforms the prognathous larva into a hypognathous adult. The internal head muscles are distinctly more slender in larvae than adults. In addition, the adults have a significantly larger brain which is likely needed for the processing of the signals obtained by the adults’ vastly expanded sensory organs that are presumably needed for dispersal and mating. Our study shows that the histolysis and modification of the inner muscles and skeletal elements take place within the prepupa. The central nervous system persists throughout metamorphosis but its morphology changes significantly. Conclusion：Our study reveals that not only the inner structures, but also the outer morphology continues to change after the final larval moult. The adult cuticle and internal structures form gradually within the cocoon. The histolysis and rebuilding begins with the skeletal elements and is followed by changes in the central nervous system before it concludes with modifications of the musculature. This order of events is likely ancestral for Holometabola because it is also known from Hymenoptera, Diptera, Mecoptera, and Coleoptera.
The"slide technique"-a novel free-hand method of subaxial cervical pedicle screw placement
Authors: Liu Bin , Liu Xiangyang , Shen Xiongjie , Wang Guoping , Chen Yixin
Published: May 2020

Background: Cervical Pedicle Screw(CPS) placement is a challenging work due to the high risk of neurovascular complications. Although there have been several different free-hand or navigation assisted techniques for CPS placement, perforations may occur during screw insertion, especially lateral perforation. The objective of this manuscript is to describe a novel free-hand technique for subaxial CPS placement (C3–C7) and to evaluate if it decreases the chances of perforation.Methods: Thirty-two patients undergoing surgery with CPS instrumentation (C3–C7) at our institute between June 2017 and December 2018 were included in this study. All the patients had cervical trauma, and pedicle screw insertion was performed according to the free-hand “slide technique”. The lamina, lateral mass and facet joint of the target area were exposed and the optimal entry point was found on the lateral mass posterior surface. A pedicular probe was then inserted and gently advanced. During the pedicle probe insertion, the cortex of the medial margin of the pedicle acted as a slide to permit the safe insertion of the screw. If the pedicle screw pathway was intact, the screw of the appropriate size was carefully placed. Three-dimensional (3D) CT imaging reconstruction was performed in all the patients after surgery, and screw perforations were graded with the Gertzbein-Robbins classification.Results: A total of 257 CPSs (C3-7) were inserted, of which 41 CPSs were in C3, 61 CPSs were in C4, 55 CPSs were in C5, 53 CPSs were in C6, and 47 CPSs were in C7. The diameter and length of CPSs were 3.5 mm and 22-26 mm respectively. According to the Gertzbein-Robbins classification, grade 0, 231 screws; grade 1, 19 screws; and grade 2, 7 screws. No neurovascular complications occurred stemming from malpositioning of pedicle screws. Among perforated screws (26 screws), there were 16 lateral perforations, 5 medical perforations, and 4 inferior perforations.Conclusions: The initial usage result shows the “slide technique” is a safe, effective and cost-effective technique for pedicle screw placement in the cervical spine. This is the first report of such a technique. We recommend its use though further studies are needed.
Melatonin regulates the neurotransmitter secretion disorder induced by caffeine through the gut-brain axis in zebrafish (Danio rerio)
Authors: Peng Qiannan , Zhang Zeng , Huo Dongxue , Jiang Shuaiming , Ma Chenchen , Chang Haibo , Reiter Russel , Shi Haitao , Zhang Jiachao
Published: May 2020

Background: Melatonin has been widely used as a "probiotic agent" capable of producing strong neurotransmitter secretion regulatory effects. The probiotics related researches also provide the evidence of microbial interactions with the gut-brain axis for mental health. In the present study, a zebrafish neural hyperactivity model was established using caffeine induction, and the regulation and mechanism of melatonin and probiotic on zebrafish neurotransmitter secretion disorder were explored. To further address the challenge that if the gut microbes play an essential role in the regulation of neurotransmitter secretion disorder via a process that involves melatonin, the Germ-free (GF) zebrafish model was used to verify the hypothesis. Results: Disorders of brain neurotransmitter secretion caused by caffeine, including that of dopamine (DA), γ-aminobutyric acid (γ-GABA), and 5-hydroxytryptamine (5-HT), were improved after interference treatment with melatonin or the probiotic. Metagenomic sequencing demonstrated that the melatonin-treated zebrafish gradually restored their normal intestinal microbial structure, while probiotic supplementation may restructure a new microbiome. Additionally, supplementation with melatonin significantly regulated intestinal microbial functional features, which indicated the gut microbiota plays the key role in the function of melatonin. Based on this activity, a Germ-free zebrafish model was applied to verified our hypothesis in the following validation experiment. Validation experiment results revealed that the effect on the zebrafish in the GF group could not achieve that on the zebrafish in the melatonin group after adding the same dose of melatonin, and subsequent real-time PCR and metabolic pathway analysis confirmed the conclusion. Meanwhile, the content of acetic acid and propionic acid in the gut of not-germ-free zebrafish decreased after caffeine induction and increased significantly after melatonin treatment. However, no acetic or propionic acids were found, detected, changed as there are germ-free zebrafish. Conclusions: In the present research, we identified the potential mechanism of melatonin regulation of neurotransmitter secretion disorder through the gut-brain axis, laying a foundation for exploring the prevention and treatment of some neuropsychiatric disorders by improving the intestinal microbiota.
Chinese Herbal Medicine Combined with Entecavir to Reduce the Off-therapy Recurrence Risk in HBeAg-positive Chronic Hepatitis B Patients: a Multicenter, Double-blind, Randomized Controlled Trial in China
Authors: Li Xiaoke , Zhang Ludan , Ye Yong'an , Du Hongbo , Qiu Mei , Huang Yi , Xiao Huanming , Lu Bingjiu , Jiang Yuyong , Long Fuli , Lin Hui , He Jinyu , Wu Qikai , Zhang Mingxiang , Wang Li , Zhu Xiaoning , Gong Man , Sun Xuehua , Sun Jianguang , Sun Fengxia , Lu Wei , Xu Weihua , Chen Guang , Li Zhiguo , Gan Danan , Yang Xianzhao
Published: May 2020

Background Nucleos(t)ide analogues (NAs) are the first-line option against chronic hepatitis B (CHB). NAs produce potent suppression of viral replication with a small chance of HBsAg seroclearance and a high risk of virological relapse after discontinuation. The combined therapy of NAs plus traditional Chinese medicine (TCM) is widely accepted and has been recognized as a prospective alternative approach in China. Based on preliminary works, this study was designed to observe the therapeutic effect of TCM plus entecavir (ETV) against HBeAg-positive chronic hepatitis B with respect to reducing the recurrence risk after NA withdrawal.Methods/design The study is a nationwide, multicenter, double-blind, randomized, placebo-controlled trial with a duration of 120 weeks. A total of 18 hospitals and 490 eligible Chinese HBeAg-positive CHB patients will be enrolled and randomly allocated into the experimental group and control group in a 1:1 ratio. Patients in the experimental group will be prescribed TCM formulae (Tiaogan-BuXu-Jiedu granules) plus ETV 0.5 mg per day for consolidation therapy for 96 weeks. Patients in the control group will be prescribed TCM granule placebo plus ETV 0.5 mg per day for the same course. After consolidation therapy, all patients will discontinue their trial drugs and be closely monitored over the next 24 weeks. Once clinical recurrence (CR) occurs, ETV treatment will be restarted. The primary outcome is the cumulative rate of CR at the end of this trial.Conclusion This study is the first of its kind to observe therapeutic effects with respect to reducing recurrence after NA withdrawals after unified integrative consolidation therapy in the CHB population.Trial registration Chinese Clinical Trial Registry No. ChiCTR1900021232, 2019/02/02, http://www.chictr.org.cn/showproj.aspx?proj=35297
Expression of VEGF-C and its association with clinicopathological features among patients with gastric cancer undergoing gastric surgery at Tongji medical hospital, China.
Authors: MAWALLA BRIAN , Luo Xiaoxiao , Xianglin Yuan
Published: May 2020

Objectives: Gastric cancer shows epidemiological variability according to geographic locations. These differences have been demonstrated both regionally and within countries. Currently, there is no baseline protocol regarding using VEGF-C as a tumor marker in a local setting, therefore, it was necessary to conduct a study to analyze the correlation between VEGF- C and clinicopathological parameters in patients with gastric cancer undergoing a surgical procedure at Tongji medical hospital.Results: 161 samples were analyzed from Chinese patients who had undergone either palliative or curative surgical procedure between October 2015 and September 2017 at Tongji medical hospital. Immunohistochemistry was used to analyses presence of VEGF-C in tissues. Among the 161 samples from gastric cancer patients, 101 (62.7%) samples showed strong VEGF-C expression and 60 (37.3%) samples showed weak VEGF-C expression. Multivariate logistic regression analysis was used to show statistical significance with strong expression of VEGF-C for tumor grade, invasion of lymph nodes and TNM staging. Strong expression of VEGF-C was significantly more likely in adenocarcinoma of gastric cancer. VEGF-C may be used as a biological marker for assessing the biological characteristics of gastric cancer.
Mitochondrial tRNA methylation in Alzheimer’s disease and progressive supranuclear palsy
Authors: Silzer Talisa K. , Pathak Gita A. , Phillips Nicole
Published: May 2020

Background. Methylation of mitochondrial tRNAs (mt-tRNA) at the 9th position (“p9 site”) is known to impact translational efficiency and downstream mitochondrial function; however, direct assessment of mt-RNA methylation is challenging. Recent RNA sequence-based methods have been developed to reliably identify post-transcriptional methylation. Though p9 methylation has been studied in healthy human populations and in the context of cancer, it has not yet been analyzed in neurodegenerative disease, where mitochondrial dysfunction is a prominent and early hallmark of disease progression. Methods. Mitochondrial p9 methylation was inferred from multi-allelic calls in RNA-seq data. Gene-based association studies were performed in FUMA. Correlations between nuclear gene expression and p9 methylation were tested using Spearman’s rho. Fisher’s Exact test was used in PANTHER and IPA to test for overrepresentation and enrichment of biological processes and pathways in the top nuclear genes correlated with p9 methylation. Results. Variable methylation was observed at 11 p9 sites in post-mortem cerebellar tissue of elderly subjects who were either healthy or diagnosed with Alzheimer’s disease (AD), progressive supranuclear palsy (PSP) or pathological aging (PA). Similarities in degree of methylation were observed between AD and PSP. Certain nuclear encoded genes were identified as significantly associated with p9 methylation. Expression of 5300 nuclear encoded genes was significantly correlated with p9 methylation, with AD and PSP subjects exhibiting similar expression profiles. Overrepresentation and enrichment testing using the top transcripts revealed enrichment for a number of molecular processes, terms and pathways including many of which that were mitochondrial-related. Conclusion. With mitochondrial dysfunction being an established hallmark of neurodegenerative disease pathophysiology, this work sheds light on the potential molecular underpinnings of this dysfunction. Here we show overlap in cerebellar pathophysiology between common tauopathies such as Alzheimer’s disease and progressive supranuclear palsy. Whether p9 hypermethylation is a cause or consequence of pathology remains an area of focus.
Isolation and characterization of bacteriophages against virulent Aeromonas hydrophila
Authors: Liu Jin , Gao Shanshan , Dong Yuhao , Lu Chengping , Liu Yongjie
Published: May 2020

Background: Aeromonas hydrophila is an important water-borne pathogen that leads to a great economic loss in aquaculture. Along with the abuse of antibiotics, drug-resistant strains rise rapidly. In addition, the biofilms formed by this bacterium limited the antibacterial effect of antibiotics. Bacteriophages have been attracting increasing attention as a potential alternative to antibiotics against bacterial infections. Results: Five phages against pathogenic A. hydrophila, named N21, W3, G65, Y71 and Y81, were isolated. Morphological analysis by transmission electron microscopy revealed that phages N21, W3 and G65 belong to the family Myoviridae, while Y71 and Y81 belong to the Podoviridae. These phages were found to have broad host spectra, short latent periods and normal burst sizes. They were sensitive to high temperature but had a wide adaptability to the pH. In addition, the phages G65 and Y81 showed considerable bacterial killing effect and potential in preventing formation of A. hydrophila biofilm; and the phages G65, W3 and N21 were able to scavenge mature biofilm effectively. Phage treatments applied to the pathogenic A. hydrophila in mice model resulted in a significantly decreased bacterial loads in tissues. Conclusions: Five A. hydrophila phages were isolated with broad host ranges, low latent periods, and wide pH and thermal tolerance. And the phages exhibited varying abilities in controlling A. hydrophila infection. This work presents promising data supporting the future use of phage therapy.
Pathogenic features of urinary Escherichia coli strains causing Asymptomatic Bacteriuria during Pregnancy
Authors: Mohebi Samane , Hashemizade zahra , Hadadi Mahtab , Kholdi Soudeh , Javadi Kasra , Motamedifar Mohammad
Published: May 2020

Background Asymptomatic bacteriuria is one of the common problems in pregnancy. Pyelonephritis, preterm labor and low birth weight infants have been associated with bacterial infection. Urinary tract infection (UTI) during pregnancy is frequently associated with complications. An observational cross-sectional study including investigated the prevalence of virulence genes, antimicrobial resistance, and its relationship with phylogenetic groups among E. coli strains isolated from pregnant women with asymptomatic bacteriuria who referred to Hafez hospital, Shiraz, Iran. Material and Methods A total of 300 urine samples were screened for Escherichia coli strains. Susceptibility testing was determined by the disk-diffusion method. The phylogenetic groups and 13 virulence genes were identified by PCR. ESBL and AmpC producing isolates were detected using phenotypic methods. PCR was used to identify the bla TEM , bla SHV and bla CTXM genes in ESBL and AmpC-positive isolates. Results Our results revealed that among 300 urine samples, 105 (35%) were positive for E. coli . The data showed that the highest and the lowest resistance rates were observed against nalidixic acid (82.1%), and imipenem (2.8%), respectively. The prevalence of ESBLs and AmpC-β-lactamase, in the E. coli isolates was 41% and 9.5% respectively. bla CTXM was the commonest genotype (93%). Phylogenetic group distribution was as follow: B1 2.8%, A 14.2%, B2 61.9%, and D 4.6%. Our result showed that most of the virulence genes belonged to group B2 and also several virulence genes such as hlyA , cnf-1 , and papGII genes were positively associated with group B2. Conclusion Among E. coli strains isolated from patients with UTIs, different features phylogroups, with special virulence factors, could cause severe infection. Awareness about the Virulence patterns distribution among Phylogenetic groups of UPEC could greatly aid in confine and prevent the development of lethal infection caused by these strains.
In vitro treatment of 3T3-L1 adipocytes with recombinant Calcium/calmodulin-dependent Protein Kinase IV (CaMKIV) limits ER stress and improves insulin sensitivity through inhibition of autophagy via the mTOR/CREB signaling pathway
Authors: Liu Jiali , Yang Ruihua , Meng Hao , Zhou Ting , He Qian
Published: May 2020

Background: CaMKIV has been identified as a potential regulator of skeletal muscle glucose metabolism and insulin gene expression in the pancreas. However, the mechanism of CaMKIV involved in adipose insulin resistance is not fully understood. Autophagy has to be shown as a potential therapeutic target for ER (endoplasmic reticulum) stress and insulin resistance. The purpose of this study is to investigate the effects of CaMKIV on the ER stress, autophagic function and insulin signaling in tunicamycin treated adipocytes. Methods: In this study, we treated mature 3T3-L1 adipocytes with tunicamycin to induce ER stress. Then recombinant CaMKIV and/or targeted-siRNA of CREB and mTOR were transfected into tunicamycin treated 3T3-L1 adipocytes. The ER stress markers, autophagy activation, mTOR/CREB signaling and insulin sensitivity were analyzed by western blotting or electron microscopy. Results: CaMKIV not only reversed tunicamycin-induced expression of p-PERK, cleaved-ATF6, Atg7 and LC3II, as well as the reduction of p62 expression, but also improved expression of p-Akt and p-IRS-1. Moreover, CaMKIV inhibited activated ER stress and elevated insulin sensitivity inAtg7 siRNA transfected adipocytes. However, the protective effects of CaMKIV were nullified by suppression of mTOR or CREB in tunicamycin-induced adipocytes. Conclusion: This study proves recombinant CaMKIV inhibits ER stress and improves insulin signaling by regulation of autophagy. The protective effect of CaMKIV in adipocytes at least partly through mTOR/CREB signaling, which could be regarded as novel opportunities for treatment of obesity and type 2 diabetes.
Resurgence risk for malaria, and the characterization of a recent outbreak in an Amazonian border area between French Guiana and Brazil
Authors: MOSNIER Emilie , Dusfour Isabelle , Lacour Guillaume , Saldanha Raphael , Guidez Amandine , Gomes Margarete S. , Sanna Alice , Epelboin Yanouk , Restrepo Johana , Davy Damien , Demar Magalie , Djossou Félix , Douine Maylis , Ardillon Vanessa , Nacher Mathieu , Musset Lise , Roux Emmanuel
Published: May 2020

Background In 2017, inhabitants along the border between French Guiana and Brazil were affected by a malaria outbreak primarily due to Plasmodium vivax ( Pv ). While malaria cases have steadily declined between 2005-2016 in this Amazonian region, a resurgence was observed in 2017. Methods Two investigations were performed according to two different spatial scales and type of information details. Firstly, a local study on the French Guiana border, which enabled a thorough investigation of the malaria cases treated at the local village health center and of the entomological situation in the most affected neighborhood and secondly a regional and cross-border study, which enabled exploration of the regional spatial-temporal epidemic dynamic. Number and location of malaria cases were estimated using French and Brazilian surveillance systems. Results On the French Guiana side of the border in Saint-Georges de l’Oyapock, the attack rate was 5.5% (n=219/4000), reaching 51.4% (n=90/175) in one Amerindian neighborhood. Entomological findings suggest a peak of Anopheles darlingi density in August and September. Two female An. darlingi (n=2/1104, 0.18%) were found Pv -positive during this peak. During the same period, aggregated data from passive surveillance conducted by Brazilian and French Guianese border health centers identified 1,566 cases of Pv infection. Temporal distribution during the 2007-2018 period displayed seasonal patterns with a peak in November 2017. Four clusters were identified among the epidemic profiles of the localities of the cross-border area. All localities of the first two clusters were Brazilian. The localization of the first cluster suggests an onset of the outbreak in the Amerindian reservation, subsequently expanding to French Amerindian neighborhoods and to non-Native communities. Conclusions The current findings demonstrate a potential increase in malaria cases in an area with otherwise declining numbers. This is a transborder area where human mobility and remote populations challenge malaria control programs. This investigation illustrates the importance of international border surveillance and collaboration for malaria control, particularly in Amerindian villages and mobile populations.
Elevated peripheral blood levels of CXCL10 are associated with the presence of diabetic polyneuropathy in subjects with type 2 diabetes
Authors: Ascaso Pilar , Palanca Ana , Martinez-Hervas Sergio , Sanz María Jesús , Ascaso Juan F , Piqueras Laura , Real Jose T
Published: May 2020

The authors have withdrawn this preprint due to author disagreement.
WITHDRAWN: Identification of Porcine circovirus type (PCV2) and type 3 (PCV3), Porcine 2 parvovirus (PPV) in swine by multiplex PCR test
Authors: Tran Thoai Kim , Nguyen Trang Thi Thanh , Vu Hiep Lai Xuan , Dinh Phat Xuan
Published: May 2020

Background : Aiming to simultaneously detect three important viruses known to be involved in reproductive problems of sows, a multiplex PCR (mPCR) test was developed to provide rapid diagnosis of porcine circovirus type 2 and 3 (PCV2, PCV3) and to illustrate parvovirus (PPV) prevalence in sow herds. Methods : Three pairs of specific primers were designed to target PCV2 Cap gene, PCV3 Cap gene and PPV NS1 gene, with predicted mPCR products of 702 bp, 267 bp and 380 bp, respectively. Results : The detection limit of mPCR was 100 copies/ reaction per target gene. Sequencing of mPCR products performed with clinical serum samples accurately confirmed results. The mPCR was run against a panel of 94 swine serum samples whose infection status had been pre-determined by commercial real-time PCR kits. Overall, the mPCR results matched 100% with the real-time PCRs. Conclusions : The developed mPCR test functions successfully and can be used in routine rapid diagnosis of PCV2, PCV3 and PPV.
Estimation of exponential growth rate and basic reproduction number of the coronavirus disease 2019 (COVID-19) in Africa
Authors: Musa Salihu S , Zhao Shi , Wang Maggie H , Habib Abdurrazaq G , Mustapha Umar T , He Daihai
Published: May 2020

Background Since the first case of coronavirus disease 2019 (COVID-19) was detected on February 14, 2020, the cumulative confirmations reached 15207 including 831 deaths by April 13, 2020. Methods We analyzed the initial phase of the epidemic of COVID-19 in Africa between 1 March and 13 April 2020, by using the simple exponential growth model.Results We estimated the exponential growth rate as 0.22 per day (95%CI: 0.20 – 0.24), and the basic reproduction number, R0, to be 2.37 (95%CI: 2.22-2.51) based on the assumption that the exponential growth starting from 1 March 2020.Conclusion The initial growth of COVID-19 cases in Africa was rapid and showed large variations across countries. Our estimates should be useful in preparedness planning. Trial registration: NA
Alantolactone inhibits cell autophagy and promotes apoptosis through targeting AP2M1 in acute lymphotic leukemia
Authors: Shi Ce , Wang Zhenkun , Yang Dongguang , Wei Jia , Liu Zhiyu , Teng Yueqiu , Lan Wenjia , Gu Mengmeng , Yuan Tian , Cao Fenglin , Zhou Jin , Li Yang
Published: May 2020

Background: Acute lymphoblastic leukemia (ALL) is an aggressive hematopoietic malignancy and most commonly seen in children. Alantolactone (ATL) has been reported to have anti-tumor activities in different types of cancer. This study aimed to evaluate the anti-tumor activity and molecular mechanisms of ATL in ALL. Methods: The ALL cells were treated with 1, 5 and 10μM of of ALT, and then subjected to MTT assay and RNA sequencing. Flow cytometry, JC-1 staining and immunofluorescence staining assay were employed to measure cell apoptosis and autophagy. Meanwhile, western blot analysis was used to detect apoptosis and autophagy-related proteins. Finally, the effect of ALT on tumor growth was measured in BV173 xenograft nude mouse model. Results: In this study, we demonstrated that ALT could inhibit the proliferation of ALL cells by inducing apoptosis and inhibiting autophagy. Administration of rapamycin activated autophagy while reversing the effect of ALT on apoptosis. Mechanically, ALT could induce apoptosis and inhibit autophagy by promoting AM2P1 expression. Further, AM2P1 was figured to inhibit beclin1 phosphorylation so that the apartment between beclin1 and bcl-2 was alleviated to participate in the regulation of autophagy and apoptosis in ALL cell. Conclusions: This study disclosed that Alantolactone can inhibit cell autophagy and promote apoptosis through targeting AP2M1 in acute lymphotic leukemia, indicating a potential therapeutic strategy for ALLtreatment.
The timeline and risk factors of clinical progression of COVID-19 in Shenzhen, China
Authors: Wang Fang , Qu Mengyuan , Zhou Xuan , zhao kai , Lai Changxiang , Tang Qiyuan , Xian Wenjie , Chen Ruikun , Li Xuan , Li Zhiyu , He Qing , Liu Lei
Published: May 2020

Background The novel coronavirus disease 2019(COVID-19) broke out globally. Early prediction of the clinical progression was essential but still unclear. We aimed to evaluate the timeline of COVID-19 development and analyze risk factors of disease progression.Methods In this retrospective study, we included 333 patients with laboratory-confirmed COVID-19 infection hospitalized in the Third People's Hospital of Shenzhen from 10 January to 10 February 2020. Epidemiological feature, clinical records, laboratory and radiology manifestations were collected and analyzed. 323 patients with mild-moderate symptoms on admission were observed to determine whether they exacerbated to severe-critically ill conditions (progressive group) or not (stable group). We used logistic regression to identify the risk factors associated with clinical progression.Results Of all the 333 patients, 70(21.0%) patients progressed into severe-critically ill conditions during hospitalization and assigned to the progressive group, 253(76.0%) patients belonged to the stable group, another 10 patients were severe before admission. we found that the clinical features of aged over 40 (3.80[1.72, 8.52]), males (2.21[1.20, 4.07]), with comorbidities (1.78[1.13, 2.81]) certain exposure history (0.38[0.20, 0.71]), abnormal radiology manifestations (3.56[1.13, 11.40]), low level of T lymphocytes (0.99[0.997, 0.999]), high level of NLR (0.99[0.97, 1.01]), IL-6 (1.05[1.03, 1.07]) and CRP (1.67[1.12, 2.47]) were the risk factors of disease progression by logistic regression.Conclusions the potential risk factors of males, older age, with comorbidities, low T lymphocyte level and high level of NLR, CRP, IL-6 can help to predict clinical progression of COVID-19 at an early stage.
Investigating the Effect of an Educational Intervention on Health Promotion Behaviors, Hope Enhancement and Mental Health in Cancer Patients
Authors: jeihooni ali khani , Rakhshani Tayebe , Gholampour Yousef , harsini pooyan afzali
Published: May 2020

Background: The aim of this study is investigating the effect of educational intervention based on PRECEDE model on health promotion behaviors, hope enhancement and mental health of cancer patients in Shiraz, Iran in 2017–2018 Methods: In this quasi-experimental study, 200 cancer patients (100 subject in experimental group and 100 subjects in control group) referred to Amir Hospital in Shiraz were investigated. Educational intervention for experimental group consisted of twelve educational sessions for 50-55 minutes. A questionnaire including demographic information, PRECEDE constructs (knowledge, attitude, self-efficacy, enabling factors and social support), was used to measure health promotion behaviors, patients’ hope and mental health before and 6 months after intervention. Results:Data were analyzed by SPSS 22, paired t-test, independent t-test and Chi-square test at the significance level of p < 0.05. The average age of cancer patients of experimental group was 46.82±5.96 years and 46.12±5.48 years in control group. 6 months after intervention, experimental group showed significant increase in knowledge, attitude, self-efficacy, enabling factors, social supports, health promotion behaviors, patients’ hope and mental health compared to the control group. Conclusions:This study showed the effectiveness of intervention based on PRECEDE constructs in mentioned factors 6 months after intervention. Hence, this model can act as a framework for designing and implementing educational intervention for health promotion behaviors of cancer patients.
Serum Prednisolone Levels as a Marker of Oral Corticosteroid Adherence in Severe Asthma
Authors: Ramsahai James Michael , King Emily , Niven Robert , Tavernier Gael , Wark Peter , Simpson Jodie
Published: May 2020

Background Severe asthma is a complex heterogeneous disease typically requiring advanced therapies. Underlying the treatment of all asthma, however, is the consistent recommendation across international guidelines to ensure that adherence to therapy is adequate. Currently, there is no consensus on an objective marker of adherence.Methods We performed a prospective observational study of 17 participants taking oral prednisolone using serum prednisolone levels as a marker of adherence, and sputum eosinophilia as a marker of control of type 2 airway inflammation. Based on these biomarkers, we classified participants into a non-adherent and an adherent cohort, and further stratified by the presence of ongoing sputum eosinophilia.Results We identified 3 non-adherent participants and 14 who were adherent, based on their serum prednisolone levels. Stratification using sputum eosinophil counts identified one participant as having ongoing sputum eosinophilia in the setting of non-adherence, while six were identified as steroid resistant with ongoing sputum eosinophilia despite adherence to oral prednisolone therapy.Conclusion Serum prednisolone can be used an objective marker of adherence in those patients with severe asthma taking daily oral prednisolone. In combination with sputum eosinophil counts, a steroid resistant cohort can be distinguished from one with ongoing inflammation in the setting of non-adherence. This information can then be used by clinicians to differentiate the optimal next steps for treatment in these specific populations.
Circular RNA profiling of buffalo myoblasts reveals an abundant circPICALM that promotes myoblast differentiation
Authors: Song Mingming , Chen Mengjie , Huang Kongwei , Zhong Dandan , Chen Yaling , Fu Jiayuan , Jiang Mingsheng , Liu Qingyou , Shi Deshun , Li Hui
Published: May 2020

Background Muscle development is a precisely orchestrated and complex process, and circular RNAs (circRNAs) has been demonstrated to play important roles in skeletal muscle growth and development. However, the regulatory functions of circRNA during buffalo muscle developmental processes have not been understood.Results In this study, Ribo-Zero RNA-Seq was performed to investigate the circRNAs expression profiles of proliferated and differentiated buffalo myoblasts. A stringent set of 3,142 circRNAs was finally characterized. Comparing the expression profiles of circRNAs revealed that 110 circRNAs were expressed differentially during myoblast differentiation. We focused on the role of a candidate circRNA, which was named circPICALM based on its host gene PICALM, and was highly (but differentially) expressed in proliferated and differentiated myoblasts. Flow cytometry, EdU incorporation, and Western blotting assays demonstrate that circPICALM promoted myoblasts proliferation and inhibited cells apoptosis. Moreover, overexpression of circPICALM promoted the differentiation of primary buffalo myoblasts. Moreover, circPICALM in vivo stimulated skeletal muscle regeneration in cardiotoxin-induced muscle injury. The RNA pulldown results showed that circPICALM could capture TUBA1B protein, revealing that circPICALM might exert its biological function by binding TUBA1B protein. Conclusions These results demonstrate that the novel non-coding regulator circPICALM induces myoblast differentiation and skeletal muscle regeneration.
Salmonella Minnesota Emergence in Poultry Production: Danger to Public Health?
Authors: Melo Roberta Torres de , Cardoso Taciano dos Reis , Peres Phelipe Augusto Borba Martins , Braz Raquelline Figueiredo , Santos Fernanda Aparecida Longato , Monteiro Guilherme Paz , Rossi Daise Aparecida
Published: May 2020

Purpose: The aim of this study was to analyze in S. Minnesota the presence of virulence genes, phylogenetic relationship, biofilm formation index (BFI) and its ultrastructure at temperatures of 4 °C, 25 °C and 36 °C and also the ability of biocidal agents to promote inhibition of the sessile structure formed by 20 strains isolated in the years 2009, 2010 and 2014 in broiler slaughter plants of two Brazilian companies.Methods: The presence of specific genes was evaluated by PCR and the phylogeny between the strains by PFGE, while BFI was performed by the classical method using TSB broth supplemented with 5% of chiken juice and its structure observed by SEM Chlorhexidine 1%, sodium hypochlorite 1% and peracetic acid 0.8% were tested for biofilm inhibition.Results: The presence of specific genes indicates that S. Minnesota has the potential to cause disease in humans and to adapt to adverse conditions. In general, temperatures of 25 °C and 36 °C favored more biofilm formation, although at 4 °C there is still biomass with potential contaminant from the final product. Tolerant strains (12/20–60%) to all biocides pose a real risk for the development of adaptation mechanisms, especially for resistance to sodium hypochlorite. Phylogenetic analysis indicated the existence of cross contamination problems and the spread among companies, probably related to the formation of biofilms.Conclusion: The results show the necessity of attention to this serovar considering its resistance to sodium hypochlorite in addition to the need for rigorous monitoring and control measures based on the adoption of low temperatures in order to prevent the formation of biofilms in the poultry industry.
Evaluation of Acute Flaccid Paralysis (AFP) surveillance system, Kebbi State, Nigeria, 2013-2018
Authors: Bala Hashim Abdulmumin , Mohammed Yahaya , Barau Nyampa , Surajudeen Lukman , Ori Polycarp Uche
Published: May 2020

Background

Since 1988, the incidence of polio has reduced by more than 99 percent, worldwide, according to the WHO. Each year, more than 350,000 children were paralyzed, in more than 125 endemic countries. Today, only two countries are still having transmission of polio: Pakistan and Afghanistan. No wild poliovirus has been reported anywhere in Africa since 2016. A good and effective Acute Flaccid Paralysis (AFP) surveillance system is necessary to detect any suspected case of polio to interrupt the transmission of polio within any country. We evaluated the AFP surveillance system to identify gaps in its operations.
Methods

We used the updated CDC guidelines for evaluating public health surveillance systems and the WHO performance standards to assess the system. We also interviewed stakeholders using an adapted questionnaire, and a key informant interview. We also reviewed AFP surveillance data from 2013–2018. We summarized data using means, frequencies, and proportion.
Results

We interviewed a total of 49 respondents. Of these, 47 (98%) reported case definitions as being easy to use, and case investigation forms as being easy to fill, 46 (97%) reported data tools could easily accommodate changes, and all the surveillance officers understand the case definition of AFP. All respondents were willing to continue with the system. The non-polio AFP rate (24.6–55.2), stool adequacy (95-99.7%), timeliness, and completeness of reporting were found to be consistently above the WHO minimum standard.
Conclusion

The AFP surveillance system in Kebbi State was found to be useful, simple, flexible, acceptable, sensitive, representative, timely, and stable, though donor-driven. Absence of data on 60-day follow up and feedback from the laboratory was a major problem with the system.
Analysis of oral risk-factors for ventilator-associated pneumonia in critically ill patients
Authors: Takahama Ademar , de Sousa Vitoria Iaros , Tanaka Elisa Emi , Ono Evelise , Ito Fernanda Akemi Nakanishi , Costa Priscila Paganini , Pedrialli Maria Beatriz Bergonse , de Lima Heliton Gustavo , Fornazieri Marco Aurélio , Correia Leticia Sassaki , Cardoso Lucienne Tibery Queiroz , Carrilho Claudia Maria Dantas de Maio
Published: May 2020

Objective: This a cross-sectional study to evaluate the association between oral health findings and ventilator-associated pneumonia (VAP) among critically ill patients in intensive care units (ICU). Material and Methods: Data were collected from medical records, and a detailed oral physical examination was performed on 663 critically ill patients on mechanical ventilation. Data were statistically analysed using univariate and logistic regression models relating the development of VAP with the oral findings. Results: At oral physical examination, the most frequent findings were tooth loss (568 - 85.67%), coated tongue (422 - 63.65%) and oral bleeding (192 - 28.96%). Patients with a coated tongue or oral bleeding on the first day of ICU hospitalization developed more VAP than did patients without these conditions (20.14% vs 13.69%: p=0.02; 23.44% vs 15.50%: p=0.01, respectively). In the logistic regression, a coated tongue and oral bleeding were considered independent risk factors for VAP development [OR=1.60 (1.02-2.47) and OR=1.59 (1.05 – 2.44), respectively]. Conclusions: The presence of a coated tongue and oral bleeding in ICU admission could be considered markers for the development of VAP. Clinical relevance: The results of this paper reinforces the importance of proper maintenance of oral hygiene before intubation, which may lead to a decrease in the incidence of VAP in the ICU. This is particularly important in the COVID-19 current scenario, where more people are expected to need mechanical ventilation, consequently increasing cases of VAP.