The origins of IgA-secreting cells in the acinar structures of the nasal turbinates [RNA-seq]
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PROVIDER: PRJNA1103722 | ENA |
REPOSITORIES: ENA
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Project description:Nasal vaccination elicits a humoral immune response that provides protection from airborne pathogens, yet the origins and specific immune niches of antigen-specific IgA-secreting cells in the upper airways remain unknown. Here, we define glandular acinus structures of the nasal turbinates as an immunological niche that recruits IgA-secreting plasma cells from the nasal-associated lymphoid tissues (NALT) in response to intranasal vaccination. Using intact organ imaging, we investigated the cellular events that support antibody-mediated immune responses in the mouse upper airways. Through visualization of antigen-specific T and B cells in the upper airways, we demonstrate that nasal vaccination induced extensive B cell expansion in the subepithelial dome (SED) of the NALT, followed by invasion into commensal bacteria-driven chronic germinal centers (GCs) in a T cell-dependent manner. Antigen-specific B cell response in the NALT required pre-expansion of cognate T cells, which initiate the immune response in the inter-follicular regions of the NALT, and occurred effectively in the presence of Monophosphoryl-Lipid A (MPLA), a synthetic, non-toxic TLR-4 agonist. NALT ablation and blockade of PSGL-1 demonstrated that intranasal vaccination generates IgA+ plasma cells that home to the nasal turbinates through the blood circulation where they are positioned primarily around glandular acinus structures. Thus, the glandular part of the nasal turbinate is an immunological niche that hosts NALT-derived IgA-secreting cells. These cellular events can be manipulated to design vaccines against inhaled pathogens or in the treatment of upper airway allergic responses.
2024-05-30 | GSE252018 | GEO
Project description:Nasal vaccination elicits a humoral immune response that provides protection from airborne pathogens, yet the origins and specific immune niches of antigen-specific IgA-secreting cells in the upper airways remain unknown. Here, we define glandular acinus structures of the nasal turbinates as an immunological niche that recruits IgA-secreting plasma cells from the nasal-associated lymphoid tissues (NALT) in response to intranasal vaccination. Using intact organ imaging, we investigated the cellular events that support antibody-mediated immune responses in the mouse upper airways. Through visualization of antigen-specific T and B cells in the upperairways, we demonstrate that nasal vaccination induced extensive B cell expansion in the subepithelial dome (SED) of the NALT, followed by invasion into commensal bacteria-driven chronic germinal centers (GCs) in a T cell-dependent manner. Antigen-specific B cell response in the NALT required pre-expansion of cognate T cells, which initiate the immune response in the inter-follicular regions of the NALT, and occurred effectively in the presence of Monophosphoryl-Lipid A (MPLA), a synthetic, non-toxic TLR-4 agonist. NALT ablation and blockade of PSGL-1 demonstrated that intranasal vaccination generates IgA+ plasma cells that home to the nasal turbinates through the blood circulation where they are positioned primarily around glandular acinus structures. Thus, the glandular part of the nasal turbinate is an immunological niche that hosts NALT-derived IgA-secreting cells. These cellular events can be manipulated to design vaccines against inhaled pathogens or in the treatment of upper airway allergic responses.
2024-08-17 | GSE264641 | GEO
Project description:The origins of IgA-secreting cells in the acinar structures of the nasal turbinates
| PRJNA1103715 | ENA
Project description:The origins of IgA-secreting cells in the acinar structures of the nasal turbinates [scRNA-seq]
| PRJNA1057109 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-05-30 | GSE264643 | GEO
Project description:Circulating antibody secreting cells are present in peripheral blood of healthy individuals reflecting continued activity of the humoral immune system. Antibody secreting cells typically express CD27. We describe and characterize a small population of antibody secreting class switched CD19+CD43+ B cells that lack expression of CD27 in peripheral blood of healthy subjects. Class switched CD27-CD43+ B cells possess characteristics of conventional plasmablasts as they spontaneously secrete antibodies, are morphological similar to antibody secreting cells, show downregulation of B cell differentiation markers. In order to further characterize the cells in comparison to other B cell subtypes we performed gene expression studies. RNA was isolated from sort-purified IgA-expressing and IgG-expressing B cell subpopulations [CD27+CD43-, CD27+CD43+, CD27-CD43-, CD27-CD43+] obtained from 3 healthy adults, and microarray analysis was performed. Data from IgA-expressing B cell populations and from IgG-expressing B cell populations were normalized (separately).
2023-11-01 | E-MTAB-12406 | biostudies-arrayexpress
Project description:Gut bacteria induce IgA expression in pituitary hormone-secreting cells during aging
| PRJNA999204 | ENA
Project description:Gut-educated IgA-secreting plasma cells that disseminate beyond the mucosa and into systemic tissues can help prevent disease in several contexts. Here we show, the commensal bacteria Bacteroides fragilis (Bf), is an efficient inducer of systemic IgA responses. The generation of bone marrow IgA plasma cells and high levels of serum IgA specific to Bf requires robust intestinal colonization. Bf-specific IgA responses were severely diminished in mice lacking Peyer’s patches, but not mice lacking a cecal patch. Colonization resulted in few changes in the host transcriptional profile in the gut, suggesting a commensal relationship. High levels of Bf-specific serum IgA, but not IgG, provided protection from peritoneal abscess formation in a bowel perforation model of Bf dissemination. These findings demonstrate a critical role for bacterial colonization and Peyer’s patches in the induction of robust systemic IgA responses that confer protection from bacterial dissemination originating from the gut.
2024-07-25 | GSE272717 | GEO
Project description:IgA nephropathy (IgAN), the most common primary glomerulonephritis, is characterized by deposits of IgA-containing immune complexes in the kidney glomeruli, as first described by Berger and Hinglais in 1968. IgAN is a major cause of end-stage renal disease with its associated cardio-renal morbidity and mortality. Analyses of the IgA deposits revealed that the IgA is exclusively of the IgA1 subclass and that this IgA1 is aberrantly glycosylated, deficient in galactose in some O-glycans (Gd-IgA1). Patients with IgAN have elevated serum levels of Gd-IgA1 bound by anti-glycan autoantibodies in circulating immune complexes (CIC) that are fundamental in driving disease pathology in an autoimmune process. We have recently shown that elevated serum levels of Gd-IgA1 in patients with IgAN predict disease progression. Thus, understanding the mechanisms behind Gd-IgA1 production will improve future treatment options, as there is presently no disease-specific therapy. A total of 24 cell pellets (4 replicates from 6 cell lines) were analyzed by LCMS metabolomics. Immortalized immunoglobulin-producing cell lines were generated from peripheral-blood lymphocytes from patients with IgAN and healthy controls as described in Suzuki, H., Moldoveanu, Z., Hall, S., et al. IgA1-secreting cell lines from patients with IgA nephropathy produce aberrantly glycosylated IgA1. J Clin Invest. 2008, 118, 629-639.
2017-02-17 | ST000560 | MetabolomicsWorkbench
Project description:To compare gene expression between CD11b+ IgA and CD11b- IgA cells in the small intestine, each cell population was isolated from the murine small intestine. Similar experiment with different sample was performed as described in Gene expression on CD11b+ IgA and CD11b- IgA cells in the small intestine #02
2013-04-01 | E-GEOD-37225 | biostudies-arrayexpress