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Hematopoietic stem cell a reservoir of innate immune memory.
Front Immunol
December 2024
Aix Marseille University, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Centre d'Immunologie de Marseille-Luminy (CIML), Marseille, France.
Hematopoietic stem cells (HSCs) are a rare, long-lived and multipotent population that give rise to majority of blood cells and some tissue-resident immune cells. There is growing evidence that inflammatory stimuli can trigger persistent reprogramming in HSCs that enhances or inhibits the cellular functions of these HSCs and their progeny in response to subsequent infections. This newly discovered property makes HSCs a reservoir for innate immune memory.
View Article and Find Full Text PDFImmune and physiological responses in to ammonia-N stress: a multi-omics approach.
Front Immunol
December 2024
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, Guangzhou, China.
Ammonia-N stress is a significant environmental factor that adversely affects the health and productivity of aquaculture species. This study investigates the effects of ammonia-N stress on the shrimp through a combination of biochemical, histological, transcriptomic, and metabolomic analyses. Shrimp were exposed to ammonia-N stress for 12 and 96 hours, and key markers of oxidative stress, nitrogen metabolism, immune response, and overall health were assessed.
View Article and Find Full Text PDFThe impact of persistent organic pollutants on fertility: exposure to the environmental toxicant 2,3,7,8-tetrachlorodibenzo-p-dioxin alters reproductive tract immune responses.
Front Immunol
December 2024
Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States.
Exposure to environmental contaminants can result in profound effects on the host immune system. One class of environmental toxicants, known as dioxins, are persistent environmental contaminants termed "forever chemicals". The archetype toxicant from this group of chemicals is 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD), an immunotoxicant that activates the aryl-hydrocarbon receptor pathway leading to a variety of changes in immune cell responses.
View Article and Find Full Text PDFInfluence of maternal nutrition and one-carbon metabolites supplementation on bovine antimicrobial peptides in fetal and maternal tissues.
Front Vet Sci
December 2024
Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, United States.
Introduction: Maternal nutrition during pregnancy critically influences offspring development and immune function. One-carbon metabolites (OCM) are epigenetic modifiers that may modulate antimicrobial peptide (AMP) expression, which is vital for innate immunity. This study investigated the effects of maternal nutrient restriction and OCM supplementation on mRNA expression of AMP in fetal and maternal lung, mammary gland, and small intestine of beef cattle.
View Article and Find Full Text PDFInflammasome regulation by the cell surface ecto-5'-nucleotidase of the oral commensal, Streptococcus oralis.
Biochem Biophys Res Commun
December 2024
Department of Oral Microbiology and Immunology, Graduate School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-Ku, Tokyo, 142-8555, Japan. Electronic address:
Streptococcus oralis is a commensal oral bacterium that acts as an opportunistic pathogen, causing systemic diseases, such as infective endocarditis and aspiration pneumonia. However, the specific molecular mechanisms underlying its transition from commensal to pathogenic state remain unclear. In this study, to further elucidate the mechanisms underlying virulence expression, we identified and characterized the cell surface-associated ecto-5'-nucleotidase (Nt5e) in S.
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