Publications by authors named "Weixia Cheng"

Article Synopsis
  • Researchers have developed glucose-responsive insulin release systems, using chitosan-based three-compartment microspheres (TCMs) to achieve prolonged insulin delivery.
  • The TCMs release insulin based on blood glucose levels, as glucose generates gluconic acid, which degrades chitosan and triggers insulin release from compartments with varying concentrations.
  • In tests, TCMs showed longer-lasting insulin release and effective blood glucose regulation in diabetic cell models, demonstrating promising potential for diabetes treatment and insulin research.
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  • This research introduces a new method for creating carbon dots (P-CDs) from biomass xylan, integrated into a nanofiber membrane to form a sensitive fluorescent sensor called NFP-CDs.
  • The NFP-CDs sensor is designed for quick detection of nitrite ions, showing an impressive response time of less than 1 second and a low detection limit of 0.36 μM, achieved through combined detection techniques.
  • Tested in various food samples, the sensor demonstrates high accuracy and a recovery rate between 99% and 106%, contributing to food safety and environmental monitoring advancements.
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The patient is a 12-year-old male who has experienced recurrent perianal abscesses for over 10 years, along with recurrent oral ulcers and deformities in the joints of hands and feet. Gastrointestinal endoscopy and capsule endoscopy revealed multiple ulcers in the digestive tract. Combined with his histopathological examinations, the patient was diagnosed with Crohn's disease.

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Copper ions (Cu) pose significant risks to both human health and the environment as they tend to accumulate in soil and water. To address this issue, an innovative method using biomass-derived fluorescent carbon dots (D-CDs) synthesized via a hydrothermal process, with xylan serving as the carbon source was developed. D-CDs solution exhibited remarkable sensitivity and selectivity as a fluorescence sensor for Cu, boasting a low detection threshold of 0.

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Human health is under growing threat from the increasing incidence of bacterial infections. Through their antimicrobial mechanisms, bacteria use appropriate strategies to overcome the antimicrobial effects of antibiotics. The enhanced effects of synergistic strategies on drug-resistant bacteria and biofilms have led to increasing interest in these approaches in recent years.

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Background: Children with refractory constipation experience intense and persistent symptoms that greatly diminish their quality of life. However, the underlying pathophysiological mechanism responsible for this condition remains uncertain. Our objective was to evaluate characteristics of colonic motor patterns and interstitial cells of Cajal (ICCs) to refractory constipation children, as well as intestinal microbiota compositions.

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Picric acid (PA) is highly water-soluble, the fact makes it stand out as the most hazardous environment pollutant. Therefore, accurate determination of PA is of great significance for human health and environmental protection. Herein, a novel indole-based fluorescent sensor (H1) with good water solubility and fluorescence stability was reported.

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Article Synopsis
  • Cholestatic liver disease is commonly referred to pediatric liver transplant centers, with inherited disorders being a significant cause of this condition in infants.
  • A study of 166 participants with intrahepatic cholestasis revealed that 31% had identifiable disease-causing genetic variants, including metabolic and syndromic liver diseases.
  • The research highlighted the importance of re-analyzing whole-exome sequencing data, leading to new discoveries of genetic causes and potential novel candidate genes associated with cholestasis.
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Bacterial infections pose a serious threat to public health, causing worldwide morbidity and about 80 % of bacterial infections are related to biofilm. Removing biofilm without antibiotics remains an interdisciplinary challenge. To solve this problem, we presented a dual-power driven antibiofilm system Prussian blue composite microswimmers based on alginate-chitosan, which designed into an asymmetric structure to achieve self-driven in the fuel solution and magnetic field.

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The emergence, spread and difficult removal of bacteria biofilm, represent an ever-increasing persistent infections and medical complications challenge worldwide. Herein, a self-propelled system Prussian blue micromotor (PB MMs) were constructed by gas-shearing technology for efficient degradation of biofilms by combining chemodynamic therapy (CDT) and photothermal therapy (PTT). With the interpenetrating network crosslinked by alginate, chitosan (CS) and metal ions as the substrate, PB was generated and embedded in the micromotor at the same time of crosslinking.

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Corrosion damage in reinforcing steel bars has been a major cause of cracking and spalling of reinforced concrete. To extend the service life of concrete structures, non-destructive testing methods are necessary to assess the corrosion status in order to conduct a timely repair. At the early stage of corrosion, rust grows from the reinforcing bar, subsequently generates cracks towards the surface of the concrete.

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Inspired by the structure of eukaryotic cells, multicompartmental microcapsules have gained increasing attention. However, challenges remain in the fabrication of "all-aqueous" (., oil-free) microcapsules composed of accurately adjustable hierarchical compartments.

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Biocatalytic reaction networks in eukaryotic cells is realized by the immobilized and compartmental multi-enzymatic system. Inspired by the spatial localization of natural cells, multiple enzymes were confined within the multicompartmental microcapsules, which were created using a gas-shearing method coupled with surface-triggered in situ gelation strategy. Heterogeneous multicompartmental (two-, three-, four-, six-, or eight-faced) core particles, due to their capacity for positional assembly, were encapsuled in alginate hydrogel shells.

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Prussian blue (PB) with distinct hollow mesoporous structure and favorable properties has captured the attention of extensive biomaterial researchers. However, there is an unmet need for biocompatible PB microparticles with recyclability fabricated by a facile method. Herein, a size-controlled PB alginate microparticles (PBAMs) generated by a one-step and large batch production gas-shearing strategy.

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The aim of this study was to investigate the clinical utility of panel-based next-generation sequencing (NGS) in the diagnostic approach of glycogen storage disease (GSD). We performed a retrospective review of the 32 cases with suspected GSDs between April 2013 and November 2019 through panel-based NGS, clinical and biochemical data and long-term complications. Of the 32 clinical cases, we identified 41 different variants, including 24 missense (58.

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Article Synopsis
  • Human caliciviruses, especially norovirus genotype GII.4, are significant causes of viral diarrhea in children, as highlighted by a study in China.
  • Among 295 children with acute diarrhea, 10.85% tested positive for HuCV, with most being HBGA secretors or partial secretors, while only a small percentage of asymptomatic children tested positive.
  • The findings suggest that blood type O may be linked to a higher risk of GII.3 infection, but due to the small sample size, additional research is needed for confirmation.
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  • A study conducted in Nanjing in 2013 aimed to identify the major viruses responsible for hand, foot and mouth disease (HFMD) in hospitalized children and examine their clinical and genetic features.
  • The research found that 68.5% of throat swabs tested positive for enteroviruses, with coxsackievirus A6 (CVA6) being the most prevalent strain, followed by enterovirus 71 (EV71) and others.
  • Patients infected with CVA6 exhibited atypical symptoms compared to those with EV71, and the study highlighted the presence of genetically distinct strains of CVA6 circulating in the region.
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  • Researchers used PCR to amplify and sequence the genome of human bocavirus 2 (HBoV2) from fecal samples collected in 2010, resulting in a 5444 bp genome (HBoV2-NC).
  • Phylogenetic analysis indicated that HBoV2-NC is most closely related to the HBoV2 Lanzhou strain.
  • The study also predicted that HBoV2-NC contains inverted terminal repeats with a typical stem-loop structure, which is characteristic of other parvoviruses, and some additional flanking sequences were identified through linker-PCR.
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Objective: To study the infected information, clinical symptom and molecular epidemiological characteristics of HuCV infection among children under 5 years old in Nanjing.

Methods: In Nanjing Children's Hospital of Nanjing Medical University from July 2010 to June 2011, we collected 428 stool specimens from children with diarrhea and 428 asymptomatic controls. Human Calicivirus were tested by using RT-PCR.

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  • A high-throughput DNA sequencing method revealed a new porcine bocavirus (PBoV), identified as PBoV3C, in 19.6% of fecal samples from healthy piglets.
  • PBoV3C has a nearly complete genome sequence of 5235 bp and exhibits genome characteristics similar to other known bocaviruses, showing a genomic similarity of 78% to 81% compared to other strains.
  • The study highlights significant diversity and complexity in PBoVs and suggests a standardized naming system based on the VP1 gene for better classification.
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Rapid and broad diagnostic methods are needed for the identification of viral agents of gastroenteritis. In this study, we used Luminex xMAP technology to develop a multiplexed assay for the simultaneous identification of major enteric viral pathogens, including rotavirus A (RVA), noroviruses (NoVs) (including genogroups GI and GII), sapoviruses (SaV), human astrovirus (HAstV), enteric adenoviruses (EAds), and human bocavirus 2 (HBoV2). The analytical sensitivity allowed detection of 10(3) (EAds, HBoV2, and RVA) and 10(4) (NoV GI and GII, SaV, and HAstV) copies per reaction mixture.

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Article Synopsis
  • Acute gastroenteritis (AGE) is a major cause of death in children, with Human bocavirus 2 (HBoV2) recently being linked to its occurrence, although previous data has been limited.
  • The study involved 632 children with diarrhea and 162 healthy controls in Lanzhou, China, analyzing various viruses, including HBoV2, using Real-time PCR for detection and quantification.
  • Results showed HBoV2 was present in 20.4% of gastroenteritis cases but had a weaker association with AGE compared to other viruses, and infection with HBoV2 didn't worsen symptoms, indicating it likely doesn't cause AGE.
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  • The study investigates the role of noroviruses (especially GII-4) in causing acute gastroenteritis among adults in Beijing, revealing that 19.4% of specimens tested positive for NVs.
  • Researchers identified new recombinant norovirus types and noted significant mutations in the capsid protein of the GII-4/Den Haag strain that may help it evade immune responses.
  • The findings suggest that noroviruses are a major cause of gastroenteritis in Chinese adults and highlight the potential for recombination hotspots in noroviruses to contribute to their evolution and persistence.
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  • The study aimed to investigate human parechovirus (HPeV) in stool samples from children under 5 with acute gastroenteritis.
  • A real-time PCR test identified HPeV in 27 out of 306 children, with a higher incidence in autumn and a notable peak in July, especially in children older than 2.
  • The findings align with previous reports on HPeV epidemiology, and the researchers emphasize the importance of ongoing large-scale surveillance for HPeV, as HPeV3 was notably absent in their samples.
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Objective: To study the epidemiologic characteristics of viral diarrhea in children under 5 years old in Lanzhou, understand the four major virus in children of distribution.

Methods: In the first hospital of Lanzhou university from Jul 2009 to Jun 2010,we collected 290 stool specimens from children with diarrhea and 114 asymptomatic controls. Rotavirus was detected by ELISA,further strain characterization was carried out by nested PCR.

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