Enhanced protective efficacy of a dendritic cell-targeting truncated F protein delivery via minicircle DNA vaccine against genotype VII newcastle disease virus in chickens.

Newcastle disease (ND), caused by the Newcastle disease virus (NDV), poses a severe threat to global poultry farming, leading to significant losses annually. The limitations of current ND vaccines in terms of efficacy and duration of protection have encouraged the exploration of novel vaccine designs. This study aimed to adopt a delayed-lysis Salmonella strain χ11218 as vaccine delivery vector.

Emerging threats of H5N1 clade 2.3.4.4b: cross-species transmission, pathogenesis, and pandemic risk.

H5N1 is a highly pathogenic avian influenza virus (HPAIV) with zoonotic potential, posing a significant risk to animal health, agriculture, and human public health. A particular strain, clade 2.3.

Enterococcus Durans J396 Isolated from the Intestine of a Pig Enhances the Antioxidant Activity in Caenorhabditis Elegans.

Enterococcus durans is a potential probiotic with beneficial for the health of people and animals. However, the understanding of the antioxidant activity of E. durans is limited.

Synbiotic Intervention with Inulin and LPm77 Attenuates Type 2 Diabetes via Enhanced TUDCA Metabolism and Gut-Liver Axis Modulation.

Type 2 diabetes mellitus (T2DM) is a metabolic disorder characterized by inflammation and immune dysregulation, with the gut-liver axis playing a crucial role in immunometabolic balance. While dietary fibers show therapeutic potential, their mechanisms in T2DM remain unclear. This study investigates the effects of synbiotic intervention combining inulin and LPm77 on T2DM, focusing on the gut-liver axis.

Dual-mode delivery of canine parvovirus type 2c VP2 protein in recombinant Lactobacillus plantarum: Surface display and intracellular expression systems.

Canine parvovirus type 2 (CPV-2) causes an acute and highly transmissible disease characterized by severe hemorrhagic enteritis and myocarditis, ultimately resulting in the death of dogs and wild carnivores. At present, although vaccines have been developed for CPV-2, there are no specific and effective vaccines available for prevention of CPV-2c infection. To develop mucosal vaccines against CPV-2c, we constructed recombinant Lactobacillus plantarum (L.

Gut microbiota-derived isovaleric acid ameliorates influenza virus infection via gut-lung axis.

H9N2 influenza virus infections represent a significant respiratory health concern, yet the functional role of gut microbiota during infection progression remains poorly understood. Here, we show that H9N2 infection causes dose-dependent alterations in gut microbial communities in a mammalian infection model, particularly the depletion of Prevotella species. Prophylactic administration of Prevotella copri improved survival and clinical outcomes in infected mice by restructuring the gut microbiome, promoting beneficial bacteria, and suppressing pathogens.

Improved protection against H9N2 avian influenza virus challenge in chickens by the presence of LTB adjuvant on the 3M2e-NP nanoparticle vaccine delivered by sifA deficient Salmonella.

The H9N2 avian influenza virus is a still a great threat to poultry production and public health due to its variation. The highly conserved extracellular domain, M2 ion channel (M2e), and the nuclear protein (NP) are usually considered to be potential targets for a broad-spectrum influenza vaccine. In this study, we took use of a regulated delayed lysis Salmonella χYL56 lacking the sifA gene as a delivery vector to deliver a lumazine synthase (LS) based nanoparticle vaccine decorating with three copies of M2e (H9N2, H5N1 and H1N1 subtype, 3M2e) and NP protein, without or with LTB adjuvant, yielding S311 and S325, respectively.

strains derived from wild bird provide protection against challenge in locally-sourced broilers.

Introduction: Necrotic enteritis (NE), caused by , has seen a surge in chicken populations recently due to the ban on antibiotic growth promoters in feed.

Methods: In this research, screening and identification of probiotics with strong antagonistic ability against from 34 wild bird fecal isolates, followed by analysis of probiotic characteristics and carbon source metabolic activity. Strains exhibiting favorable antagonistic activity against were subsequently employed in vivo study to evaluate their protective efficacy against challenge in locally-sourced broilers.

Breed-specific differences of gut microbiota and metabolomic insights into fat deposition and meat quality in Chinese Songliao Black Pig and Large White × Landrace Pig Breeds.

Background: Gut microbiota ferment non-digestible substances to produce metabolites that accumulate in muscle and influence host metabolism. However, the regulatory mechanisms connecting gut microbiota, metabolites, and fat deposition across pig breeds remain unclear. This study explores the gut-muscle axis regulating fat deposition and meat quality in Chinese Songliao Black Pig (SBP) and Large White × Landrace Pigs (LWLDP).

Evaluation of broad-spectrum protection by novel mRNA vaccines against SARS-CoV-2 variants (Delta, Omicron-BA.5, XBB-EG.5) in the golden hamster model.

Background: The SARS-CoV-2 virus has continuously evolved, with new variants like Delta, Omicron-BA.5, and XBB-EG.5 posing challenges to vaccine efficacy.

A strain of Lactobacillus plantarum from piglet intestines enhances the anti-PoRV effect via the STING-IFN-I pathway.

Background: Rotavirus infection represents a major etiology of severe diarrheal disease in neonatal and weaned piglets, causing substantial economic burdens to the global swine industry. Lactobacillus plantarum, a ubiquitous probiotic in natural ecosystems, has demonstrated multifaceted biological functions. The stimulator of the interferon gene (STING) is involved in type I interferon (IFN-I) mediated host antiviral innate immunity, which is a pivotal adaptor in response to the microbial DNA/RNA-activated signaling pathways.

Butyrate-Producing Mixed Probiotics Alleviate MRSA-Induced Acute Lung Injury in Mice by Promoting M2 Macrophage Polarization.

Methicillin-resistant Staphylococcus aureus (MRSA) is a major pathogen responsible for acute lung injury (ALI) and other respiratory diseases. Probiotics and their metabolic byproducts are essential regulators of the gut-lung axis. This study investigated the protective effects of a mixed probiotics combination (Ligilactobacillus salivarius H3, Bacillus stratosphericus J1366, and Priestia megaterium J1037), which demonstrated inhibitory activity against MRSA growth and biofilm formation in vitro, on MRSA-induced ALI in mice.

Cholesterol 25-hydroxylase inhibits Newcastle disease virus replication by enzyme activity-dependent and direct interaction with nucleocapsid protein.

Newcastle disease virus (NDV) is a significant enveloped virus within the Paramyxoviridae family, posing a major threat to the global poultry industry. Increasing evidence suggests that cholesterol-25-hydroxylase (CH25H) and its enzymatic product, 25-hydroxycholesterol (25HC), exhibit broad-spectrum antiviral activity properties by modulating lipid metabolism and various signaling pathways. However, the specific role of CH25H in regulating NDV infection and replication remains unclear.

Faecalibacterium prausnitzii-derived outer membrane vesicles reprogram gut microbiota metabolism to alleviate Porcine Epidemic Diarrhea Virus infection.

Background: The Porcine Epidemic Diarrhea Virus (PEDV) is one of the major challenges facing the global pig farming industry, and vaccines and treatments have proven difficult in controlling its spread. Faecalibacterium prausnitzii (F.prausnitzii), a key commensal bacterium in the gut, has been recognized as a promising candidate for next-generation probiotics due to its potential wide-ranging health benefits.

Expressing Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) Single-Chain Antibody Can Inhibit PRRSV Replication and Change the Intestinal Flora Structure of Piglets.

Porcine reproductive and respiratory syndrome (PRRS) is an infectious disease that can cause reproductive disorders in sows and affect the breathing of piglets, seriously endangering pig breeding worldwide. In this study, NC8 was used as the expression delivery vector of foreign proteins, and a single-chain antibody was designed based on an mAb-PN9cx3 sequence. Three recombinant strains of , namely, NC8/pSIP409-pgsA'-PN9cx3-scFV(E), NC8/pSIP409-pgsA'-PN9cx3-HC(E), and NC8/pSIP409-pgsA'-PN9cx3-LC(E), were successfully constructed.

Evaluation of the Immunogenicity of a Pool of Recombinant Expressing Eight Antigens of African Swine Fever Virus in a Mouse Model.

African swine fever (ASF), caused by African swine fever virus (ASFV), poses a great threat to the global pig industry. There is an urgent demand for effective and safe vaccines to address this threat. This study reports the generation and evaluation of a recombinant pool, each strain expressing one of eight ASFV antigens (F317L, H171R, D117L, E120R, B602L, CD2v, p54, and p72).

Recombinant probiotic Escherichia coli delivers the polymeric protein of swine influenza virus for protection.

Swine influenza virus invades the host through the respiratory mucosa, which severely restricts the development of the pig breeding industry. To construct monomeric and trimeric vaccines, we developed recombinant Escherichia coli Nissle 1917 (EcN) strains that express the receptor binding site (RBS) of the hemagglutinin (HA) antigen from H1N1 swine influenza virus. After the mucosal immunization of mice, we found that probiotics activated CD40 and CD86 in DCs and increased the levels of IL-4 and IFN-γ secretion by T cells.

A Pool of Bacterium-like Particles Displaying African Swine Fever Virus Antigens Induces Both Humoral and Cellular Immune Responses in Pigs.

Background/objectives: African swine fever (ASF), caused by African swine fever virus (ASFV), poses a significant threat to the global swine industry. This underscores the urgent need for safe and effective ASF vaccines.

Methods: Here, we constructed five bacterium-like particles (BLPs) that each display one of the five ASFV antigens (F317L, H171R, D117L, B602L, and p54) based on the Gram-positive enhancer matrix-protein anchor (GEM-PA) system.

The role of 5-hydroxytryptamine on expulsion of Trichinella spiralis during the intestinal stage.

During the intestinal stage of Trichinella spiralis (T. spiralis) infection, it can stimulate host's intestinal peristalsis to expulse worms. 5-hydroxytryptamine (5-HT) is a neurotransmitter which can regulate the contraction of intestinal smooth muscle.

Transcriptome and Metabolome Insights into Key Genes Regulating Fat Deposition and Meat Quality in Pig Breeds.

Meat quality is a complex trait that exhibits significant variation across pig breeds, and the regulatory mechanisms governing pork meat quality are not fully elucidated. We compared the transcriptomics and metabolomics of the longissimus dorsi (LD) muscle between the Songliao Black Pig (SBP) and Large White × Landrace Pig (LWLDP) to investigate breed-specific differences in meat quality and underlying regulatory pathways. The results showed that SBP meat had a higher marbling score and backfat thickness, a richer color, a lower shear force, and reduced drip loss.

Interleukin-13 partly induced by the NLRP3 inflammasome promotes Trichinella spiralis encapsulation in infected mice.

Trichinella spiralis infection is a serious parasitic zoonosis in which a collagenous capsule surrounding the larva is developed in the striated muscle cells. However, the mechanism of T. spiralis encapsulation is currently poorly understood.

from Sauerkraut Alleviates Acute Lung Injury Induced by Methicillin-Resistant through the Regulation of M2 Macrophage Polarization via Its Metabolite Esculin.

Sauerkraut contains various fermentative microorganisms that produce active metabolites, enhancing immunity and resistance to infections. However, its effects on methicillin-resistant (MRSA)-induced acute lung injury (ALI) remain unclear. Using RAW264.

Oral Immunization of Mice with a Nonantibiotic Recombinant Coexpressing TsNd and gp43 Protein Vaccine Combined with a Murine Interleukin-33 Adjuvant.

Trichinellosis, a zoonotic disease transmitted through food and caused by , is a significant health concern worldwide. Therefore, developing a safe and effective vaccine to combat infection is essential. In this study, a nonantibiotic strain lacking the gene served as a live bacterial vector to deliver antigens to the host, creating a novel oral vaccine.

The PB1 protein of H9N2 influenza A virus inhibits antiviral innate immunity by targeting MAVS for TRIM25-mediated autophagic degradation.

The proteins encoded by Influenza A virus (IAV) evade the innate immune system through diverse strategies to facilitate their replication. However, the regulatory mechanisms remain not fully understood. In this study, we identified that the H9N2 PB1 protein suppressed the activities of the IFN-β, ISRE, and NF-κB promoters.

Delivery of dendritic cells targeting 3M2e-HA2 nanoparticles with a CpG adjuvant via lysosomal escape of Salmonella enhances protection against H9N2 avian influenza virus.

Avian influenza virus (AIV) subtype H9N2 still poses a great threat to the poultry farming industry and public health worldwide, and the development of a new influenza vaccine that is safe and conservative and able to address influenza virus mutations is highly promising for application. HA2, the neck of the HA protein, and M2e, the extracellular N-terminal structural domain of the M2 protein, are conserved and effective protective antigens. In this study, the HA2 sequences were fused with three M2e copies (H9N2, H1N1 and H5N1) to the norovirus VP1 protein via the SpyTag-SpyCatcher platform to form self-assembled nanoparticles and display antigenic proteins on its surface, yielding pYL262.