Analysis of factors related to radiation-induced oral mucositis in patients with head and neck tumors undergoing radiotherapy.

Objective: To explore the risk factors of radiation-induced oral mucositis (RIOM) in patients with head and neck tumors undergoing radiotherapy.

Methods: A retrospective collection was conducted on patients with head and neck tumors who underwent radiotherapy and chemotherapy in our hospital from April 1, 2015 to April 1, 2019. They were divided into an incidence group (n = 48) and a non-incidence group (n = 76) based on whether RIOM occurred, and relevant data was collected for comparison.

Pan-genome of Citrullus genus highlights the extent of presence/absence variation during domestication and selection.

The rich genetic diversity in Citrullus lanatus and the other six species in the Citrullus genus provides important sources in watermelon breeding. Here, we present the Citrullus genus pan-genome based on the 400 Citrullus genus resequencing data, showing that 477 Mb contigs and 6249 protein-coding genes were absent in the Citrullus lanatus reference genome. In the Citrullus genus pan-genome, there are a total of 8795 (30.

Genomic and phenotypic biology of a novel WH1 isolated from rice in China: Insights into pathogenicity and virulence factors.

Soft rot caused by is an important bacterial disease affecting rice and other plants worldwide. In this study, Nanopore and Illumina sequencing platforms were used to sequence the high-quality complete genome of a novel strain WH1 (size: 4.68 Mb; depth: 322.

Quorum Sensing Inhibition and Metabolic Intervention of 4-Hydroxycinnamic Acid Against .

The natural product 4-hydroxycinnamic acid (HA) was firstly isolated from the metabolites of , one endophytic fungus from leaves. The anti-QS potential of HA was evaluated by β-galactosidase assay and acylated homoserine lactones (AHL) analysis. The MIC of HA was > 1.

1-(4-Amino-2-Hydroxyphenyl)Ethenone Suppresses Virulence and Metabolism.

The impact of 1-(4-amino-2-hydroxyphenyl)ethanone (AHPE) from the metabolites of endophytic fungus on quorum sensing (QS) of was evaluated for the first time in this study. Exposure to AHPE at concentrations ranging from 12.5 to 50 μg/mL, the β-galactosidase activity, acyl-homoserine lactone level, swimming motility, chemotaxis, and flagella formation were significantly inhibited.

1-(4-Amino-2-hydroxyphenyl)ethanone from Phomopsis liquidambari showed quorum sensing inhibitory activity against Pseudomonas aeruginosa.

Phomopsis liquidambari S47 is an endophytic fungus isolated from the leaves of Punica granatum. Here, we are the first to report a quorum sensing (QS) inhibitor 1-(4-amino-2-hydroxyphenyl)ethanone (AHE) isolated and identified from the metabolites of P. liquidambari S47.

Can the quorum sensing inhibitor resveratrol function as an aminoglycoside antibiotic accelerant against Pseudomonas aeruginosa?

Pseudomonas aeruginosa infection is a serious disease in cystic fibrosis patients and is difficult to treat owing to biofilm persistence and emerging multidrug resistance. Considering the essential role of quorum sensing (QS) in P. aeruginosa infections, the enhanced effects between the quorum sensing inhibitor (QSI) resveratrol and several antibiotics against P.

A Centralized Report on Pediatric Japanese Encephalitis Cases from Beijing Children's Hospital, 2013.

Fifteen pediatric cases of suspected Japanese encephalitis (JE) were reported in Beijing Children's Hospital during the late summer of 2013. The clinical manifestations in most cases included high fever, seizures, and abnormal magnetic resonance imaging findings. Twelve of 15 cases were laboratory-confirmed as JE cases by pathogen identification.

The quorum-sensing inhibiting effects of stilbenoids and their potential structure-activity relationship.

Stilbenoids, known an important phytoalexins in plants, were renowned for their beneficial effects on cardiovascular, neurological and hepatic systems. In the present study, quorum sensing inhibition activity of ten stilbenoids were tested using Chromobacterium violaceum CV026 as the bio-indicator strain and the structure-activity relationship was also investigated. Among them, resveratrol (1), piceatannol (2) and oxyresveratrol (3) showed potential anti-QS activities.

[Research advances in molecular epidemiology and vaccines of Coxsackievirus A16].

Epidemics of hand, foot and mouth disease (HFMD) have mainly been caused by Coxsackievirus A16 (CVA16) and Enterovirus A 71 (EV-A71), which circulated alternatively or together in the affected area. CVA16 has caused numerous outbreaks and epidemics in multiple countries and geographical regions, and has become an important public health problem. Based on an analysis of the complete VP1 coding region, all CVA16 strains can be divided into genotypes A, B1, and B2.

[Immunoprotective effect of inactivated coxsackievirus A16 vaccine in mice].

This study aims to construct inactivated coxsackievirus A16 (CVA16) vaccine and to investigate its protective effect in ICR mice. A clinical isolate of CVA16, 521-01T, was cultured in VERO cells, inactivated by formaldehyde, and purified by ultracentrifugation for vaccine preparation. Purity and other characteristics of the vaccine were determined by SDS-PAGE and Western blot.

[Epidemiology and etiology of hand-foot-and-mouth disease in Hainan, 2010].

To reveal the epidemiological and pathogenic characteristics of Hand-foot-and-mouth disease (HFMD) in Hainan province in 2010, epidemiology data of HFMD reporting cases were analyzed, clinical specimens from 1346 HFMD cases were collected for enterovirus (EV) detection. Viral isolation was performed for EV nucleic acid positive samples. Complete VP1 encoding region of EV71 were sequenced and analyzed with Sequencher (version 5.

[Transmission and prevalence patterns of C4a evolutionary lineage of human enterovirus 71 circulating in mainland China, 2008-2010].

Objective: To understand the evolutionary relationship between the C4a evolutionary lineage of human enterovirus 71 (HEV71) strains circulating in mainland of China during 2008-2010 and 2008 Fuyang strains and study the prevalence and transmission patterns of 2008 Fuyang strains.

Methods: Download all the complete VP1 ( > or = 891 bp) or approximate complete VP1 (> or = 876 bp) gene nucleotide sequences from GenBank of HEV71 strains circulating in Mainland of China during 2008-2010. And analyze the phylogenetic relationship between Fuyang strains and other provinces' strains using the MEGA software, version 5.

[Multiple viral transmission chains of enterovirus 71 co-circulated in Jilin Province during 2009-2010].

Objective: To analyze the genetic characterization of enterovirus type71 (EV71) associated with hand foot and mouth disease (HFMD) epidemics in Jilin province, during 2009-2010.

Methods: Randomly selected 31 representative EV71 strains from the cases of 8 prefectures to amplify and sequences of VP1 genes of EV71 strains, and analyzed with Bioedit and Mega4.0 program.

[Etiology of hand-foot-and-mouth disease seen in Nanjing in 2010 and molecular characteristics analysis of EV71].

Objective: To study the etiological agent of hand-foot-and-mouth disease (HFMD), and to genetically characterize enterovirus 71 (EV71) isolated from clinical specimens of HFMD patients in Nanjing in 2010.

Method: Throat swab specimens were collected from 248 inpatients with HFMD in Nanjing Children's Hospital and then viral isolation was performed. Real-time PCR was used for detection of EV71, coxsackievirus A16 (Cox A16) and other enteroviruses from the positive isolates.

[Epidemiology and etiology of hand-foot-and-mouth disease in Shanghai, 2009].

To analyze the epidemiological and etiological characteristics of Hand-Foot-and-Mouth disease (HFMD) in Shanghai in 2009, epidemiological data was retrieved from the National Notifiable Disease Report System (NNDRS). Nucleic acid of enterovirus (EV) was detected by real-time RT-PCR from 799 HFMD cases from 15 districts/counties in Shanghai; the complete sequences of VP1 encoding region of several identified EV71 strains and sequences of VP4 encoding region of several untyped EV were determined and analyzed. Analysis and summary of the epidemiological data was conducted with Microsoft Excel, and sequence analyses were conducted with both BioEdit and MEGA software.

[Etiology of hand-foot-and-mouth disease and genetic characteristics of Coxsackievirus A16 in Beijing, 2009].

This study aimed to reveal the pathogen spectrum of hand-foot-and-mouth disease (HFMD) and genetic characteristics of Coxsackievirus A16 (CoxA16) isolates in Beijing in 2009. From 1044 clinical specimens collected from 975 HFMD cases at Beijing Pediatrics Hospital, Beijing You'an Hospital and Beijing Ditan Hospital in 2009, viral nucleic acids of enterovirus were detected by reverse transcriptase polymerase chain reaction (RT-PCR). Enterovirus isolations were conducted with rhabdomyosarcoma (RD) cell line on 200 throat swabs having positive RT-PCR results.

[Genetic characteristics of entervirus 71 isolated in Ningxia Hui Autonomous region in 2009].

Objective: To analyze the genetic characteristics of EV71 strains isolated from HFMD cases in Ningxia Hui Autonomous Region in 2009.

Methods: In 2009, totally 385 specimens from 344 HFMD cases were collected from Ningxia. Enterovirus isolation was performed in RD cell line from all the specimens.

[Genetic analysis of VP1 sequences of enterovirus 71 isolated from patients of hand, foot and mouth disease in Beijing, 2008].

Objective: To get genetic information of VP1 coding region of HEV71 in Beijing in 2008.

Methods: Enteroviruses were isolated from samples of throat swabs collected from 33 HFMD patients within 3 days after onset by rhabdomyosarcoma(RD) cells and identified by RT-PCR method with specific primers to human enteroviruses, then VP1 coding region was amplified and sequenced by Sanger dideoxy. Bioedit 7.

[The epidemiologic and virological analysis of an outbreak of hand, foot, and mouth disease in Inner Mongolia in 2007].

In 2007, an outbreak of hand, foot, and mouth disease (HFMD) occurred in Jungar Banner, Erdos city, Inner Mongolia Autonomous Region, China Fever, vesicular exanthema on the hands, feet, mouth, and buttocks were presented in most of the patients. Most of the patients were infants less than 5 years old, and an obvious peak period appeared in the disease outbreak. From 28 hospitalized patients, 23 stool specimens and 6 throat swab specimens were collected for enterovirus isolation, and 15 enteroviruses were isolated, 9 were identified as Human Enterovirus 71 (HEV71, the isolation rate is 31.

An outbreak of hand, foot, and mouth disease associated with subgenotype C4 of human enterovirus 71 in Shandong, China.

Background: An outbreak of hand, foot, and mouth disease (HFMD) included 1149 people in Linyi City, Shandong Province, China, in 2007: three children died.

Objectives: To characterize the pathogens responsible for this outbreak and to analyze their genetic features.

Study Design: A total of 233 clinical specimens were collected from 105 hospitalized patients, including 11 patients with severe HFMD.

Human bocavirus in children suffering from acute lower respiratory tract infection in Beijing Children's Hospital.

Background: Human bocavirus (HBoV) is a parvovirus recently found to possibly cause respiratory tract disease in children and adults. This study investigated HBoV infection and its clinical characteristics in children younger than five years of age suffering from acute lower respiratory tract infection in Beijing Children's Hospital.

Methods: Nasopharyngeal aspirates were collected from children suffering from acute lower respiratory tract infection during the winters of 2004 to 2006 (from November through the following February).