Publications by authors named "Hangfei Chen"

Article Synopsis
  • The study focused on a hypervirulent strain of A. baumannii found in a patient with pneumonia and herpes simplex virus, particularly in the context of ICU infections.
  • Researchers used various methods, including minimum inhibitory concentrations tests and whole-genome sequencing, to analyze the strain's resistance and virulence factors.
  • The A. baumannii XH2146 strain demonstrated notable resistance to multiple antibiotics and higher virulence compared to other strains, highlighting the need for early detection to prevent hospital outbreaks.
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  • Host-microbe interactions are critical for human health, highlighting the need for advanced methods to study these interactions due to their complexity across different cells and environments.
  • A novel technique called scRandom-seq allows simultaneous analysis of eukaryotic and bacterial RNAs at a single-cell level, improving our understanding of these interactions.
  • In studies using this technology on Acinetobacter baumannii, a dangerous antibiotic-resistant pathogen, researchers found that inhibiting a specific stress response in host cells could enhance their survival against infection, pointing toward new therapeutic strategies.
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Hyperactivation of ribosome biosynthesis (RiBi) is a hallmark of cancer, and targeting ribosome biogenesis has emerged as a potential therapeutic strategy. The depletion of , a major component of selectivity factor 1 (), disrupts the pre-initiation complex, preventing RNA polymerase I from binding ribosomal DNA and inhibiting the hyperactivation of RiBi. Here, we investigate the role of , in regulating RiBi and proliferation in stomach adenocarcinoma (STAD).

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Background: TAF1B (TATA Box Binding Protein (TBP)-Associated Factor) is an RNA polymerase regulating rDNA activity, stress response, and cell cycle. However, the function of TAF1B in the progression of hepatocellular carcinoma (HCC) is unknown.

Objective: In this study, we intended to characterize the crucial role and molecular mechanisms of TAF1B in modulating nucleolar stress in HCC.

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  • The study examines the global spread of Salmonella enterica sequence type 34 (ST34), which is resistant to key antimicrobials and poses a public health risk across both clinical and environmental sectors.* -
  • Analysis of 11 clinical isolates from China and over 2,300 genomes from 20 countries revealed that ST34 predominantly consists of mcr-carrying strains, notably serovar Typhimurium, with different variations of resistance (mcr-1 in China and mcr-9 in the U.S.).* -
  • Phylogeographic findings indicate that mcr-carrying ST34 strains are divided into three clusters, tracing their common ancestors back to 1951 and 1983
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A rare case of fungus Arthroderma multifidum infection occurred in a 63-year-old man. The patient had some risk factors, including occupational exposure, immunosuppressive state, and structural basis following pulmonary tuberculosis and pneumothorax surgery. The pathogen was repeatedly isolated from bronchoalveolar lavage fluid and identified by gene sequencing.

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Background: Cinobufacini, a sterilized hot water extract of dried toad skin, had significant effect against several human cancers. However, there are few studies reporting the effect of cinobufacini on pancreatic cancer.

Purpose: To investigate the effects of cinobufacini on the progress of pancreatic ductal adenocarcinoma and the underlying mechanisms.

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Background: Celastrol (CEL) has a great potential in the treatment of a wide variety of metabolic diseases. However, whether CEL protects pancreatic β cells and its underlying mechanism are not yet clear.

Purpose: This study investigates to determine the effects of CEL on the pathogenesis of pancreatic β cells damage.

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NAFLD is the most prevalent liver disease in human history. The treatment is still limited yet. In the current study, we reported that limonin inhibited hepatic lipid accumulation and fatty acid synthesis in HFD fed mice.

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Metagenomic next-generation sequencing (mNGS) enables comprehensive pathogen detection and has become increasingly popular in clinical diagnosis. The distinct pathogenic traits between strains require mNGS to achieve a strain-level resolution, but an equivocal concept of 'strain' as well as the low pathogen loads in most clinical specimens hinders such strain awareness. Here we introduce a metagenomic intra-species typing (MIST) tool (https://github.

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The presence and dissemination of carbapenem-resistant (CRKP) often cause life-threatening infections worldwide, but the therapeutic option is limited. In this study, whole-genome sequencing (WGS) was applied to assess the epidemiological characteristics and transmission dynamics of CRKP isolates recovered from two fetal outbreaks of nosocomial infections. Between April 2016 and March 2018, a total of 70 isolates of were collected from sterile samples in a tertiary hospital in Hangzhou, China.

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The prognosis of pancreatic ductal adenocarcinoma (PDAC) is poor despite diagnostic progress and new chemotherapeutic regimens. Constitutive activation of NF-κB is frequently observed in PDAC. In this study, we found that YEATS2, a scaffolding protein of ATAC complex, was highly expressed in human PDAC.

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Objectives: The emergence and dissemination of colistin-resistant Enterobacterales has become a major global public-health threat. Here we investigated the genomic and phylogenetic characteristics of a multidrug-resistant Klebsiella pneumoniae strain (KP4823) carrying the mcr-1 gene recovered from a urinary tract infection in China.

Methods: Antimicrobial susceptibility of K.

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Article Synopsis
  • Multidrug-resistant (MDR) infections pose a significant global health risk, with rising reports of colistin resistance, a last-resort antibiotic.
  • The study focused on two carbapenem-resistant bacterial isolates from a patient, comparing the characteristics before and after colistin treatment, revealing one isolate (KP1-2) developed resistance to colistin.
  • Genetic analysis identified mutations in specific genes, particularly MgrB, that contributed to this resistance, with experiments confirming that restoring the wild-type gene could revert the isolate's colistin susceptibility.
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Multidrug resistance in bacteria is a major threat to global health and the effective prevention and treatment of infections. The urgent need for novel antimicrobial agents, together with the increasing challenges in discovering and developing effective antibiotics, has inspired new approaches and strategies to circumvent antibiotic resistance. Despite this effort, the difficulty in cell-penetration and delivery of antibiotics into bacterial cells remains the bottleneck for both traditional and non-traditional antibacterial agents to realize their full potential.

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Non-alcoholic steatohepatitis (NASH) is an inflammatory disorder that is characterized by chronic activation of the hepatic inflammatory response and subsequent liver damage. The regulation of macrophage polarization in liver is closely related to the progression of NASH. The orphan nuclear receptor retinoic-acid-related orphan receptor α (RORα) and Krüppel-like factor 4 (KLF4) are key regulators which promote hepatic macrophages toward M2 phenotype and protect against NASH in mice.

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The frequent and inappropriate use of antibiotics aggravate the variation and evolution of multidrug-resistant bacteria, posing a serious threat to public health. Nosiheptide (NOS) has excellent lethality against a variety of Gram-positive bacteria, however the physical and chemical drawbacks hamper its routine application in clinical practice. In this study, by using NOS as the starting material, a total of 15 NOS analogues (2a-4e) were semi-synthesized via its dehydroalanine residue reacting with monosubstituted anilines.

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An increasing prevalence of hospital acquired infections and foodborne illnesses caused by pathogenic and multidrug-resistant bacteria has stimulated a pressing need for benchtop computational techniques to rapidly and accurately classify bacteria from genomic sequence data, and based on that, to trace the source of infection. BacWGSTdb (http://bacdb.org/BacWGSTdb) is a free publicly accessible database we have developed for bacterial whole-genome sequence typing and source tracking.

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Background: The prevalence of multidrug-resistant is increasingly being implicated worldwide in a variety of infections with high mortalities. Here, we report the complete genome sequence of strain KP58, a pandrug-resistant strain that exhibits high levels of resistance to colistin and tigecycline in China.

Methods: The strain KP58 was recovered from a urine sample of a female patient hospitalized in a tertiary hospital in Hangzhou, China.

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Objectives: Klebsiella pneumoniae has emerged worldwide as a major cause of severe infections owing to the rising prevalence of multidrug-resistant strains in clinical settings. This study aimed to investigate the genomic features of pandrug-resistant K. pneumoniae strain KP2 with high colistin and tigecycline resistance isolated from a patient in China.

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Atmospheric new particle formation (NPF) is an important global phenomenon that is nevertheless sensitive to ambient conditions. According to both observation and theoretical arguments, NPF usually requires a relatively high sulfuric acid (HSO) concentration to promote the formation of new particles and a low preexisting aerosol loading to minimize the sink of new particles. We investigated NPF in Shanghai and were able to observe both precursor vapors (HSO) and initial clusters at a molecular level in a megacity.

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Amides represent an important class of nitrogen-containing compounds in the atmosphere that can in theory interact with atmospheric acidic particles and contribute to secondary aerosol formation. In this study, uptake coefficients (γ) of six alkylamides (C to C) by suspended sulfuric acid particles were measured using an aerosol flow tube coupled to a high resolution time-of-flight chemical ionization mass spectrometer (HRToF-CIMS). At 293 K and < 3% relative humidity (RH), the measured uptake coefficients for six alkylamides were in the range of (4.

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