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Salmonella Typhimurium derived OMV nanoparticle displaying mixed heterologous O-antigens confers immunogenicity and protection against STEC infections in mice.
Microb Cell Fact
January 2025
College of Veterinary Medicine, Southwest University, Tiansheng Road NO.2, Chongqing, China.
Shiga toxin-producing Escherichia coli (STEC) is one of the major pathogens responsible for severe foodborne infections, and the common serotypes include E. coli O157, O26, O45, O103, O111, O121, and O145. Vaccination has the potential to prevent STEC infections, but no licensed vaccines are available to provide protection against multiple STEC infections.
View Article and Find Full Text PDFIdentification of Potential Sepsis Therapeutic Drugs Using a Zebrafish Rapid Screening Approach.
Life (Basel)
December 2024
Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA.
In the military, combat wound infections can progress rapidly to life-threatening sepsis. The discovery of effective small-molecule drugs to prevent and/or treat sepsis is a priority. To identify potential sepsis drug candidates, we used an optimized larval zebrafish model of endotoxicity/sepsis to screen commercial libraries of drugs approved by the U.
View Article and Find Full Text PDFDeletion of pagL and arnT genes involved in LPS structure and charge modulation in the Salmonella genome confer reduced endotoxicity and retained efficient protection against wild-type Salmonella Gallinarum challenge in chicken.
Vet Res
January 2025
College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, Iksan, 54596, Republic of Korea.
Fowl typhoid (FT) poses a significant threat to the poultry industry and can cause substantial economic losses, especially in developing regions. Caused by Salmonella Gallinarum (SG), vaccination can prevent FT. However, existing vaccines, like the SG9R strain, have limitations, including residual virulence and potential reversion of pathogenicity.
View Article and Find Full Text PDFInvestigation of the effects of melatonin on lung tissue through the NLRP3/TLR2/NEK7 pathway in an experimental endotoxemia model.
Cell Mol Biol (Noisy-le-grand)
November 2024
Yozgat Bozok University, Faculty of Medicine, Department of Anatomy, Yozgat, Turkey.
Article Synopsis
- - Sepsis is a serious condition characterized by inflammation and cell death, often leading to multiple organ failure, requiring quick medical attention; lipopolysaccharide (LPS) triggers inflammatory responses through specific receptors like TLR-2.
- - The study explores the role of melatonin (MEL) in reducing lung injury caused by LPS-induced septic shock in rats, highlighting its potential to lower the expressions of inflammatory markers NEK7, TLR2, and NLRP3.
- - Results showed that melatonin treatment reduced lung tissue damage, cell infiltration, and wall thickening, indicating that it may provide therapeutic benefits in managing sepsis-related acute lung injury.
Generation of a Mouse Model for the Study of Thyroid Hormones Regulatory Effect on the Immune System.
Methods Mol Biol
November 2024
Unidad de Oncogenómica, Servicio de Oncohematología, Fundación para la Investigación Biomédica del Hospital Universitario Niño Jesús, Madrid, Spain.
The generation of hypothyroid and hyperthyroid mouse models is one of the approaches used to investigate the complex interplay between thyroid hormones and the immune system. We present a detailed protocol describing how to induce endotoxic shock by lipopolysaccharide (LPS) administration, and how to investigate the role of immune populations, specifically macrophages, responding to endotoxemia.This book chapter provides the use of different molecular techniques, such as Western Blotting, Immunohistochemistry, q-PCR, Luciferase assays, or ChIP assays, with which researchers can gain valuable insights into the immune system's interaction with hormonal signaling pathways, for instance, examining the effect of thyroid hormones on signaling of STAT3, NF-κB, and ERK in response to LPS, and inflammatory mediators, such as interleukin-6 (IL-6) or tumor necrosis factor-alpha (TNFα) within these cells.
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