Evaluation of the Cholesterol-Lowering Mechanism of Strain 132 and Strain 201 in Hypercholesterolemia Rats.

Hypercholesterolemia can cause many diseases, but it can effectively regulated by . This study aimed to evaluate the cholesterol-lowering mechanism of strain 132 and strain 201. These results showed that both the strains decreased serum total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), liver TC and TG and increased fecal TC, TG and total bile acid (TBA) levels.

Quantitative detection of aflatoxin B using quantum dots-based immunoassay in a recyclable gravity-driven microfluidic chip.

To achieve rapid and sensitive detection of aflatoxin B (AFB), we developed a polydimethylsiloxane gravity-driven cyclic microfluidic chip using the two-signal mode strategy. The structural design of the chip, together with the two-wavelength quantum dot ratio fluorescence, effectively eliminates the influence of environmental factors, improves the signal stability, and ensures that the final detection result positively correlates with the target concentration. Moreover, the theoretical analysis performed for the established physical model of the three-dimensional reaction interface inside the chip confirmed the improved reaction rate of immune adsorption in the microfluidic strategy.

Effects of tolC on tolerance to bile salts and biofilm formation in Cronobacter malonaticus.

Bile salts is one of essential components of bile secreted into the intestine to confer antibacterial protection. Cronobacter species are associated with necrotizing enterocolitis in newborns and show a strong tolerance to bile salts. However, little attempt has been made to focus on the molecular basis of the tolerance to bile salts.

Long-Term Administration of Triterpenoids From Mitigates Age-Associated Brain Physiological Decline via Regulating Sphingolipid Metabolism and Enhancing Autophagy in Mice.

With the advent of the aging society, how to grow old healthily has become an important issue for the whole of society. Effective intervention strategies for healthy aging are most desired, due to the complexity and diversity of genetic information, it is a pressing concern to find a single drug or treatment to improve longevity. In this study, long-term administration of triterpenoids of (TGL) can mitigate brain physiological decline in normal aging mice.

Novel phage vB_CtuP_B1 for controlling Cronobacter malonaticus and Cronobacter turicensis in ready-to-eat lettuce and powered infant formula.

Cronobacter spp. are important foodborne pathogens that are a threat to people of all ages, but especially neonates and infants. Bacteriophages are biological agents that are potentially useful for the control of foodborne pathogens.

Selective Isolation of From Human Faeces Using Pangenomics, Metagenomics, and Enzymology.

, an important genus for human health, is difficult to isolate. We applied metagenomics, pangenomics, and enzymology to determine the dominant glycoside hydrolase (GH) families of Bifidobacterium and designed selective medium for isolation. Pangenomics results showed that the GH13, GH3, GH42, and GH43 families were highly conserved in .

A Novel Gene Negatively Regulates Biofilm Formation in .

is an important foodborne pathogen and its biofilm formation ability facilitates its colonization and persistence in foods by protecting it from stresses including environmental variation and antibiotic exposure. Several important proteins are involved in biofilm formation; however, the identity and function of many remain unknown. In this study, we discovered a hypothetical protein, VP0610 that negatively regulates biofilm formation in , and we found that the loss of typically results in pleiotropic phenotypes that contribute toward promoting biofilm formation, including significantly increased insoluble exopolysaccharide production and swimming motility, decreased soluble exopolysaccharide production, and decreased bis-(3'-5')-cyclic dimeric guanosine monophosphate production.

Evolutionary Mechanism of Immunological Cross-Reactivity Between Different GII.17 Variants.

Human norovirus is regarded as the leading cause of epidemic acute gastroenteritis with GII.4 being the predominant genotype during the past decades. In the winter of 2014/2015, the GII.

Identification of Novel Sensitive and Reliable Serovar-Specific Targets for PCR Detection of Serovars Hadar and Albany by Pan-Genome Analysis.

The accurate and rapid classification of serovars is an essential focus for the identification of isolates involved in disease in humans and animals. The purpose of current research was to identify novel sensitive and reliable serovar-specific targets and to develop PCR method for C2 serogroups (O:8 epitopes) in food samples to facilitate timely treatment. A total of 575 genomic sequences of 16 target serovars belonging to serogroup C2 and 150 genomic sequences of non-target serovars were analysed by pan-genome analysis.

Transcriptional Dynamics of Genes Purportedly Involved in the Control of Meiosis, Carbohydrate, and Secondary Metabolism during Sporulation in .

spores (GLS), the mature germ cells ejected from the abaxial side of the pileus, have diverse pharmacological effects. However, the genetic regulation of sporulation in this fungus remains unknown. Here, samples corresponding to the abaxial side of the pileus were collected from strain YW-1 at three sequential developmental stages and were then subjected to a transcriptome assay.

An Investigation on the Occurrence and Molecular Characterization of in Meat and Meat Products in China.

is a common foodborne pathogen that can cause both gastrointestinal and nongastrointestinal diseases. In this study, we collected 603 meat and meat products from 39 major cities in China. The positive contamination rate of in the collected samples was 26.

Development of a recombinase-aided amplification assay for rapid detection of human norovirus GII.4.

Background: Human noroviruses are one of the main causes of foodborne illnesses and represent a serious public health concern. Rapid and sensitive assays for human norovirus detection are undoubtedly necessary for clinical diagnosis, especially in regions without more sophisticated equipment.

Method: The rapid reverse transcription recombinase-aided amplification (RT-RAA) is a fast, robust and isothermal nucleic acid detection method based on enzyme reaction.

Role of the multiple efflux pump protein TolC on growth, morphology, and biofilm formation under nitric oxide stress in .

Nitric oxide (NO) is a biological signal molecule that can control and prevent the growth of most pathogens.  species are a group of gram-negative foodborne pathogens that cause severe diseases, including neonatal meningitis, septicemia, and necrotizing enterocolitis, especially among newborns and infants consuming contaminated powdered infant formula. species might be tolerant to NO, resulting in severe infections.

Review of the risk factors for SARS-CoV-2 transmission.

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, which has lasted for nearly a year, has made people deeply aware of the strong transmissibility and pathogenicity of SARS-CoV-2 since its outbreak in December 2019. By December 2020, SARS-CoV-2 had infected over 65 million people globally, resulting in more than 1 million deaths. At present, the exact animal origin of SARS-CoV-2 remains unclear and antiviral vaccines are now undergoing clinical trials.

Isolation and characterization of new phage vB_CtuP_A24 and application to control Cronobacter spp. in infant milk formula and lettuce.

Cronobacter spp. are opportunistic pathogenic bacteria that cause severe diseases in neonates and infants. Bacteriophages are novel antibacterial agents with a potential to control this pathogen.

Cas12aFDet: A CRISPR/Cas12a-based fluorescence platform for sensitive and specific detection of Listeria monocytogenes serotype 4c.

The CRISPR/Cas12a system has displayed remarkable potential in the development of new methods for nucleic acid detection owing to the trans-cleavage activity of Cas12a. Despite the tremendous development in recent years, existing CRISPR/Cas12a-based methods have several limitations such as the time-consuming process, which takes up to 2 h, and the risk of aerosol contamination during DNA amplicon transfer. Herein, we propose a CRISPR/Cas12a-based fluorescence detection platform named "Cas12aFDet" for rapid nucleic acid detection that overcomes these limitations.

An ultrasensitive CRISPR/Cas12a based electrochemical biosensor for Listeria monocytogenes detection.

Listeria monocytogenes is an important foodborne pathogen that can cause listeriosis with high patient mortality. Accordingly, it is necessary to develop a L. monocytogenes detection platform with high specificity, sensitivity, and exploitability.

Multiplex PCR for the Identification of Pathogenic in Plant Based on Novel Specific Targets Revealed by Pan-Genome Analysis.

spp. is an important foodborne disease agent, often found in the fresh mushroom () and its production environment. The aim of this study was to develop multiplex PCR for rapid identification of and , and nonpathogenic in plants.

Presence and Characterization of a Novel -Carrying Tn Transposon Derivative in Isolated From Retail Food.

Antimicrobial resistance has become a major public health threat. Food-related species have received much attention due to their multidrug resistance. The gene associated with multidrug resistance has been consistently detected in food-derived species.

Protective effect of Ganoderma lucidum spore extract in trimethylamine-N-oxide-induced cardiac dysfunction in rats.

Previous research has shown that the extracts from the Ganoderma lucidum spore (GS) have potentially cardioprotective effects, but there is still abundant room for development in determining its mechanism. In this study, the rat model of cardiac dysfunction was established by intraperitoneal injection of trimethylamine-N-oxide (TMAO), and the extracts of GS (oil, lipophilic components, and polysaccharides) were given intragastrically at a dose of 50 mg/kg/day to screen the pharmacological active components of GS. After 50 days of treatments, we found that the extraction from GS reduced the levels of total cholesterol, triglyceride, and low-density lipoprotein; increased the levels of high-density lipoprotein; and reduced the levels of serum TMAO when compared to the model group (P < 0.

Broad-range and effective detection of human noroviruses by colloidal gold immunochromatographic assay based on the shell domain of the major capsid protein.

Background: Human noroviruses (HuNoVs) are a major cause of nonbacterial gastroenteritis in all age groups worldwide. HuNoVs can be detected in vitro using molecular assays such as RT-PCR and RT-qPCR. However, these molecular-based techniques require special equipment, unique reagents, experienced personnel, and extended time to obtain results.

Library Preparation Based on Transposase Assisted RNA/DNA Hybrid Co-Tagmentation for Next-Generation Sequencing of Human Noroviruses.

Human noroviruses (HuNoVs) are one of the leading causes of foodborne illnesses globally. The viral genome is the most essential information for viral source tracing and viral transmission pattern monitoring. However, whole genome sequencing of HuNoVs is still challenging due to the sequence heterogeneity among different genotypes and low titer in samples.

Role of fliC on biofilm formation, adhesion, and cell motility in Cronobacter malonaticus and regulation of luxS.

Cronobacter malonaticus is one of the important foodborne pathogens causing infections mainly in adults. Biofilm formation, adhesion, and motility in Cronobacter have been documented, but the implying molecular mechanism has received little attention. Here, a comparison in biofilm formation, adhesion ability, and cell motility among wild type (WT), △luxS, and △fliC strains were analyzed using scanning electron microscope (SEM) and confocal laser scanning microscopy (CLSM).

Mining of novel target genes through pan-genome analysis for multiplex PCR differentiation of the major Listeria monocytogenes serotypes.

The abundant information provided by the pan-genome analysis approach reveals the diversity among Listeria monocytogenes serotypes. The objective of this study was to mine novel target genes using pan-genome analysis for multiplex PCR detection and differentiation of the major L. monocytogenes serotypes present in food.

Isolation and characterization of a novel Escherichia coli Kayfunavirus phage DY1.

Phage therapy has been revitalized since antibiotic resistance in bacteria is increasing. Compared with antibiotics, phages can target specific bacteria precisely, which requires more understanding of phage-host interactions by investigating different phages. Escherichia coli is a common pathogen with very high diversity.