Front Cell Infect Microbiol
November 2024
Brucellosis is a serious zoonosis caused by spp. infection, which not only seriously jeopardizes the health of humans and mammals, but also causes huge economic losses to the livestock industry. is a Gram-negative intracellular bacterium that relies primarily on its virulence factors and a variety of evolved survival strategies to replicate and proliferate within cells.
View Article and Find Full Text PDFHepatitis E (Hepatitis E, HE) is an acute and chronic infectious hepatitis caused by hepatitis E virus (Hepatitis E Virus, HEV) infection, which is responsible for most acute hepatitis in the world and is a significant public health problem. The pathogen, HEV, has three Open Reading Frames (ORFs) ORF1, ORF2, and ORF3, each of which has a different function. Most of the current research is focused on ORF1 and ORF2, while the research on ORF3 is still relatively small.
View Article and Find Full Text PDFGlobally, brucellosis is a widespread zoonotic disease. It is prevalent in more than 170 countries and regions. It mostly damages an animal's reproductive system and causes extreme economic losses to the animal husbandry industry.
View Article and Find Full Text PDFBrucellosis is a severe zoonotic infectious disease caused by the infection of the , which is widespread and causes considerable economic losses in underdeveloped areas. is a facultative intracellular bacteria whose main target cells for infection are macrophages, placental trophoblast cells and dendritic cells. The main clinical signs of infection in livestock are reproductive disorders and abortion.
View Article and Find Full Text PDFBrucellosis is a highly prevalent zoonotic disease caused by . spp. are gram-negative facultative intracellular parasitic bacteria.
View Article and Find Full Text PDFSwine hepatitis E (SHE) is a new type of zoonotic infectious disease caused by swine hepatitis E virus (SHEV). Open reading frame 3 (ORF3) is a key regulatory and virulent protein of SHEV. Circular RNAs (circRNAs) are a special kind of non-coding RNA molecule, which has a closed ring structure.
View Article and Find Full Text PDFSwine hepatitis E (swine HE) is a new type of zoonotic infectious disease caused by the swine hepatitis E virus (swine HEV). Open reading frame 3 (ORF3) is an important virulent protein of swine HEV, but its function still is mainly unclear. In this study, we generated adenoviruses ADV4-ORF3 and ADV4 negative control (ADV4-NC), which successfully mediated overexpression of enhanced green fluorescent protein (EGFP)-ORF3 and EGFP, respectively, in HepG2 cells.
View Article and Find Full Text PDFBrucellosis is a highly prevalent zoonotic disease characterized by abortion and reproductive dysfunction in pregnant animals. Although the mortality rate of Brucellosis is low, it is harmful to human health, and also seriously affects the development of animal husbandry, tourism and international trade. Brucellosis is caused by , which is a facultative intracellular parasitic bacteria.
View Article and Find Full Text PDFAs the molecular mechanisms of pathogenicity are not completely clear, we have applied a transcriptome approach to identify the differentially expressed genes (DEGs) in RAW264.7 macrophage infected with . The DEGs related to immune pathway were identified by Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology (GO) functional enrichment analysis.
View Article and Find Full Text PDFBrucella ovis infection results in genital damage and epididymitis in rams, placental inflammation and rare abortion in ewes, and neonatal mortality in lambs. However, the mechanism underlying B. ovis infection remains unclear.
View Article and Find Full Text PDF-caused brucellosis is one of the most widespread worldwide zoonoses. Lipopolysaccharide (LPS) of , which functions as pathogen-associated molecular patterns (PAMPs), is an important virulence factor that elicits protective antibodies. of .
View Article and Find Full Text PDFBrucellosis is a zoonotic infectious disease caused by Brucella infection. Outer membrane protein 25 (Omp25) is closely related to the virulence and immunogenicity of Brucella. However, the molecular mechanism of Omp25 affecting Brucella-mediated macrophage autophagy remains unclear.
View Article and Find Full Text PDFH5N1 avian influenza poses a serious threat to the poultry industry and human health. Non-structural protein 1 (NS1) plays an important role in the replication and pathogenesis of avian influenza virus (AIV). However, the function of the NS1 gene is still unclear.
View Article and Find Full Text PDFBrucellosis is a worldwide zoonosis caused by Brucella species and represents a serious threat to both human and animal health. Omp25 is an important immunogenic and protective antigen in Brucella species; however, the functional mechanism of Omp25 in macrophages has not yet been elucidated. Here, we constructed a Brucella melitensis omp25 deletion mutant (M5-90-Δ omp25) and performed microRNA (miRNA) profiling of infected RAW264.
View Article and Find Full Text PDFInnate recognition of Brucella spp. is a key step in the activation of inflammation. CD14 binds PAMPs and is involved in LPS-induced pro-inflammatory cytokine release.
View Article and Find Full Text PDFHepatitis E virus- (HEV-) mediated hepatitis has become a global public health problem. An important regulatory protein of HEV, ORF3, influences multiple signal pathways in host cells. In this study, to investigate the function of ORF3 from the swine form of HEV (SHEV), high-throughput RNA-Seq-based screening was performed to identify the differentially expressed genes in ORF3-expressing HepG2 cells.
View Article and Find Full Text PDFImmunopharmacol Immunotoxicol
December 2016
Context: As a component of the outer membrane in Gram-negative bacteria, lipopolysaccharide (LPS)-induced proliferation and cell cycle progression of monocytes/macrophages. It has been suggested that the proapoptotic T-cell death-associated gene 51 (TDAG51) might be associated with cell proliferation and cell cycle progression; however, its role in the interaction between LPS and macrophages remains unclear.
Objective: We attempted to elucidate the role(s) of TDAG51 played in the interaction between LPS and macrophages.
Crude okra (Abelmoschus esculentus L.) polysaccharide (RPS) was obtained by water extraction and alcohol precipitation. Three purified fractions of RPS, designated RPS-1, RPS-2, and RPS-3, were fractioned by diethylaminoethyl (DEAE)-cellulose chromatography.
View Article and Find Full Text PDFLipopolysaccharide (LPS) stimulates macrophages to release proinflammatory cytokines. MicroRNAs (miRNAs) are short noncoding RNAs that are involved in inflammatory reaction. Our previously study identified the downregulated expression of mmu-miR-27a-5p in RAW267.
View Article and Find Full Text PDFHere, we present the complete genome sequence of bovine papillomavirus genotype 13 isolated from local yellow cattle in Hainan, China. The genome is 7,961 bp and contains six early genes and two late genes. This analysis provides important information for the research of bovine papillomavirus (BPV) in China.
View Article and Find Full Text PDFA cluster of differentiation antigen 14 (CD14) is involved in lipopolysaccharide (LPS)-induced proinflammatory cytokine release and LPS-induced septic shock. MicroRNAs (miRNAs) are short non-coding RNAs that are involved in the epigenetic regulation of cellular process and bacterial infection. Our previous study indicated that siRNA against CD14 effectively inhibited LPS-induced tumor necrosis factor alpha, chemokine (C-X-C motif) ligand 2, interleukin-6 release, and NO production.
View Article and Find Full Text PDFHepatitis E virus (HEV) has emerged as an important cause of epidemic and sporadic acute viral hepatitis worldwide, which is a major public health challenge. A better understanding of the interaction between the virus and the host cell would be very helpful for its therapy. Swine HEV (SHEV) open reading frame 3 (ORF3) is a regulatory protein that alters the activity of selected transcription factors and cytoplasmic signaling pathways.
View Article and Find Full Text PDFAvian influenza has emerged as a devastating disease and may cross species barrier and adapt to a new host, causing enormous economic loss and great public health threats, and non-structural protein 1 (NS1) is a multifunctional non-structural protein of avian influenza virus (AIV) that counters cellular antiviral activities and is a virulence factor. RNA interference (RNAi) provides a powerful promising approach to inhibit viral infection specifically. To explore the possibility of using RNAi as a strategy against AIV infection, after the fusion protein expression plasmids pNS1-enhanced green fluorescent protein (EGFP), which contain the EGFP reporter gene and AIV NS1 as silencing target, were constructed and NS1-EGFP fusion protein expressing HEK293 cell lines were established, four small interfering RNAs (siRNAs) targeting NS1 gene were designed, synthesized, and used to transfect the stable cell lines.
View Article and Find Full Text PDFBrucellosis, caused by Brucella spp., is an important disease affecting not only human health, but also a number of animal species around the world. A receptor for LPS of Brucella and important innate immune molecule, CD14, has been implicated in the initiation of the inflammatory response to sepsis.
View Article and Find Full Text PDFMicroRNAs (miRNAs) are short non-coding RNAs that are involved in the epigenetic regulation of cellular processes. To identify more miRNAs which are involved in the macrophage inflammatory response to lipopolysaccharide (LPS) stimulation and dissect the mechanisms more clearly, microRNA profiling of LPS-treated RAW264.7 macrophage cells was performed by initial high-throughput array-based screen and further real-time RT-PCR validation; bioinformatics approaches were used to analyze the target genes of the differentially expressed miRNAs.
View Article and Find Full Text PDF