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Gingival spatial analysis reveals geographic immunological variation in a microbiota-dependent and -independent manner [Spatial Transcriptomics]

ABSTRACT: Understanding the impact of the microbiota on oral mucosal epithelial barriers, particularly within the gingiva, is essential for elucidating the mechanisms underlying oral health and disease. The gingiva exhibits intricate tissue architecture and undergoes dynamic microenvironmental shifts influenced by various factors. Notably, microbial colonization emerges as an early-life factor that plays a significant role in shaping the functional and immunological maturation of the gingival epithelium. This study utilizes spatial transcriptomic analysis to unveil distinct immunological characteristics between the buccal and palatal regions of the murine gingiva, impacting natural alveolar bone loss. Moreover, the analysis identifies a significant influence of the microbiota on the development and function of the junctional epithelium, which faces the oral microbial plaque, offering new insights into neutrophil recruitment to this strategic location. Additionally, the microbiota is found to impact fundamental functions of the gingival epithelium, including proliferation kinetics and barrier sealing. In conclusion, this study emphasizes the crucial role played by the microbiota in regulating gingival barriers and brings attention to its unique influence on specific epithelial regions within the gingiva.

ORGANISM(S): Mus musculus

PROVIDER: GSE269576 | GEO | 2024/12/18

REPOSITORIES: GEO

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Gingival spatial analysis reveals geographic immunological variation in a microbiota-dependent and -independent manner

Project description:Understanding the impact of the microbiota on oral mucosal epithelial barriers, particularly within the gingiva, is essential for elucidating the mechanisms underlying oral health and disease. The gingiva exhibits intricate tissue architecture and undergoes dynamic microenvironmental shifts influenced by various factors. Notably, microbial colonization emerges as an early-life factor that plays a significant role in shaping the functional and immunological maturation of the gingival epithelium. This study utilizes spatial transcriptomic analysis to unveil distinct immunological characteristics between the buccal and palatal regions of the murine gingiva, impacting natural alveolar bone loss. Moreover, the analysis identifies a significant influence of the microbiota on the development and function of the junctional epithelium, which faces the oral microbial plaque, offering new insights into neutrophil recruitment to this strategic location. Additionally, the microbiota is found to impact fundamental functions of the gingival epithelium, including proliferation kinetics and barrier sealing. In conclusion, this study emphasizes the crucial role played by the microbiota in regulating gingival barriers and brings attention to its unique influence on specific epithelial regions within the gingiva.

2024-12-18 | GSE269171 | GEO

Gingival spatial analysis reveals geographic immunological variation in a microbiota-dependent and -independent manner [scRNA-seq]

2024-12-18 | GSE269575 | GEO

New mechanisms for oral epithelial basal stem cell plasticity during re-epithelialization after injury

Project description:The oral mucosa undergoes daily insults and stem cells in the epithelial basal cell layer are required to regenerate gingiva tissue to maintain oral health. The Iroquois Homeobox 1 (IRX1/Irx1) protein is expressed in the stem cell niches in human/mouse oral epithelium and mesenchyme under homeostasis. We found that Irx1+/- heterozygous (Het) mice have delayed wound closure, delayed morphological changes of regenerated epithelium, as well as defective keratinocyte proliferation and differentiation during wound healing. RNA-seq analyses between wildtype and Irx1+/- mice at 3 days post injury (dpi), found impaired epithelial migration and decreased keratinocyte-related genes upon injury. Irx1 expressing cells are found in the gingival epithelial basal cell layer, a stem cell niche for gingival maintenance. Irx1 expressing cells are also found in cell niches in the underlying stroma. Irx1 activates Sox9 in the transient amplifying layer to increase cell proliferation and EGF signaling is activated to induce cell migration. Krt14CreERT lineage tracing experiments reveal defects in the stratification of the Irx1+/- heterozygous mouse oral epithelium. Irx1 is primed at the base of the gingiva in the basal cell layer of the oral epithelium, facilitating rapid and scarless wound healing through activating Sox9 and the EGF signaling pathway.

2024-11-14 | GSE281359 | GEO

Single Cell RNA sequencing of mouse periodontitis gingiva

Project description:Purpose: The goal of this study was to characterize the gingival oral barrier immunity of mouse periodontitis gingiva. Method: A silk thread (ligature) was tied wround the mouse maxillary molar. Mouse palatal gingiva was harvested at 1 days after the ligature placement. Gingival cells were harvested and subjected to 10X Genomix scRNA-seq. Cell Ranger processed data were analysed.

2023-11-09 | GSE228635 | GEO

Single Cell RNA sequencing of mouse early periodontitis gingiva

Project description:Purpose: The goal of this study was to characterize the gingival oral barrier immunity of mouse early periodontitis gingiva. Method: A silk thread (ligature) was tied wround the mouse maxillary molar. Mouse palatal gingiva was harvested at 1 days after the ligature placement. Gingival cells were harvested and subjected to 10X Genomix scRNA-seq. Cell Ranger processed data were analysed.

2022-04-21 | GSE201108 | GEO

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Project description:The postnatal microbiota-immune axis establishes lifelong homeostasis at mucosal epithelial barriers. However, whether barrier-specific physiological activities regulate this process remains ill-defined. During weaning, the oral epithelium, which is monitored by Langerhans cells (LCs), is challenged by the development of a microbial plaque and the initiation of masticatory forces capable of damaging the epithelium. We demonstrate that microbial colonization following birth facilitates the differentiation of oral LCs, setting the stage for the weaning period, where adaptive immunity develops. Despite the presence of the challenging microbial plaque, LCs mainly respond to masticatory mechanical forces, inducing adaptive immunity to maintain epithelial integrity that is also associated with bone loss. Unlike adult life, this bone loss is IL-17-independent, suggesting that the establishment and maintenance of oral mucosal homeostasis involve distinct mechanisms. Moreover, barrier-specific features play a fundamental role in this early-life process.

2023-07-17 | GSE232790 | GEO

Single Cell RNA sequencing of TLR9 ligand (CpG oligonucleotide) and TLR2/4 ligand (LPS)-treated mouse gingiva

Project description:Purpose: The goal of this study was to characterize the gingival oral barrier immunity of TLR9 ligand (CpG oligonucleotide) and TLR2/4 ligand (LPS)-treated mouse maxilla. Method: TLR9 ligand or TLR2/4 ligand was topically applied to the mouse palatal gingiva. Mouse palatal gingiva was harvested at 4 days after topical application. Gingival cells were harvested and subjected to 10X Genomix scRNA-seq. Cell Ranger processed data were analysed.

2022-04-21 | GSE201109 | GEO

MicroRNA profiling of Gingival tissue from chronically SIV infected rhesus macaques

Project description:The study describes miRNA expression in Gingival tissue of chronically SIV-infected rhesus macaques. HIV/SIV-associated periodontal disease (gingivitis/periodontitis) (PD) represents a major comorbidity affecting HIV patients on anti-retroviral therapy. Employing a systems biology approach, we report molecular changes underlying PD and its modulation by phytocannabinoids [delta-9-tetrahydrocannabinol (9-THC)] in uninfected and SIV-infected rhesus macaques (RMs) untreated (VEH-untreated/SIV) or treated with vehicle (VEH/SIV) or 9-THC (THC/SIV). VEH- untreated/SIV but not THC/SIV RMs showed significant enrichment of genes linked to anti-viral defense, interferon-beta, NFkB, RIG-1, and JAK-STAT signaling. We focused on the anti-microbial DUOX1 and immune activation marker IDO1 that were reciprocally regulated in gingiva of VEH-untreated/SIV RMs. Both proteins localized to the gingival epithelium and CD163+ macrophages, and showed differential expression in the gingiva of THC/SIV and VEH/SIV RMs. Additionally, inflammation-associated miR-21, miR-142-3p, miR-223, and miR-125a-5p showed significantly higher expression in the gingiva of VEH/SIV RMs. In human primary gingival epithelial cells, miR-125a-5p post-transcriptionally downregulated DUOX1 These findings strongly support a role for differential miRNA expression associated with HIV/SIV induced gingival mucosal dysfunction.

2021-11-30 | GSE181541 | GEO

Gene expression analysis of gingival fibromatosis gingiva

Project description:Gingival fibromatosis (GF) is a rare oral condition characterized by proliferative fibrous overgrowth of both the attached and marginal gingiva, and the interdental papilla. But there were no papers about gene expression of gingival fibromatosis. The aim of this study was to identify the differential expression of genes in GF using cDNA microarray analysis.

2017-02-14 | GSE58481 | GEO

Transcription profiling of human male and femal gingiva

Project description:All experiment was done according to the Affymetrix manufacturerâs protocol. The resulting HGF gingiva expression profile(Hereditary gingival fibromatosis patient Gingiva replicate1 and replicate 2)was compared to normal gingiva control(Normal Gingiva replicate1 and replicate2). The data were collected and analyzed by GCOS 1.2 and GeneSpring 7.2 1-way T test. Experiment Overall Design: Hereditary gingival fibromatosis patient Gingiva (experimental) and Normal Gingiva (control) were used. N1 and P1 are gingiva tissue from female individuals while N2 and P2 are from male ones.

2008-06-12 | E-GEOD-4250 | biostudies-arrayexpress

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