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Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration

ABSTRACT: Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration

PROVIDER: PRJNA1033176 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26495145_1.fastq.gz	Fastqsanger.gz
	SRR26495145_2.fastq.gz	Fastqsanger.gz
	SRR26495146_1.fastq.gz	Fastqsanger.gz
	SRR26495146_2.fastq.gz	Fastqsanger.gz
	SRR26495147_1.fastq.gz	Fastqsanger.gz

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Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration [scRNA-seq]

Project description:The bone-defect-repair process involves complex interaction between mesenchymal stem cells (MSCs) and immune cells, while the heterogeneity of osteoimmune microenvironment around implanted biomaterials remains elusive. By combining analysis of scRNA-seq and spatial transcriptomics technologies, we revealed that MgphiMSCs subpopulation served as the pioneers during the early stage of biomaterials-mediated bone defect healing process. They performed efficient osteogenic differentiation potential and had close interactions with immune cells. Remarkably, the MgphiMSCs could response to biomaterials-mediated osteoimmune microenvironment, rewired the polarization and osteoclastic differentiation of macrophages via midkine (MDK) signaling pathway. The inhibition of MDK activated the pro-inflammatory programs of macrophages and osteoclastogenesis. Meanwhile, multiple innate and adaptive immune-cell subsets exhibited close crosstalk between MgphiMSCs via SPP1 signaling pathway. These cellular profiles and interactions characterized in this study could broaden our understanding of the functional MSCs subpopulations at the early stage of biomaterial-mediated bone regeneration and provide the basis for the materials-designed strategies that target osteoimmune modulation.

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Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration [scRNA-seq]

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Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration [ST-seq]

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Single-cell RNA sequencing and spatial transcriptomics reveal the osteoimmune microenvironment of biomaterial-mediated bone regeneration

Project description:This SuperSeries is composed of the SubSeries listed below.

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The Role of WTAP in Regulating Macrophage-Mediated Osteoimmune Responses and Tissue Regeneration in Periodontitis

Project description:Periodontitis, delineated by the destruction of structures that support teeth, is predominantly propelled by intricate immune responses. Immunomodulatory treatments offer considerable promise for the management of this ailment; however, the modulation of the periodontal immune microenvironment to facilitate tissue regeneration presents a substantial biomedical challenge. Herein, our study investigates the role of Wilms' tumor 1-associating protein (WTAP), a critical m6A methyltransferase, in the immunomodulation of periodontitis and assesses its viability as a therapeutic target. We observed heightened expression of WTAP in macrophages extracted from gingival tissues impacted by periodontitis, with a strong association with M1 polarization. Via loss-of-function experiments, we demonstrated that diminishing WTAP expression precipitates a transition from M1 to M2 macrophage phenotypes amidst inflammatory conditions, thus improving the periodontal immune landscape. Further, RNA sequencing and indirect co-culture assays indicated that suppressing of WTAP expression modulates osteoimmune responses and enhances the osteogenic differentiation of bone marrow stromal cells. The local deployment of adeno-associated virus-shWTAP in murine models of periodontitis robustly validated the therapeutic promise of targeting WTAP in this disease. Collectively, our findings highlight the crucial role of WTAP in orchestrating macrophage-mediated osteoimmune responses and tissue regeneration in periodontitis, proposing novel avenues for immunotherapeutic interventions in its treatment.

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Project description:Biomaterial properties can be tailored for specific applications via systematic and high-throughput screening of biomaterial–cell interactions. However, progress in material development is often hampered by the lack of adequate in vitro testing methods, frequently due to incomplete understanding of involved in vivo mechanisms. In line with drug discovery in pharmacology, a crucial step in assay development for biomaterial screening is the identification of a target to direct the screen against. Herein, the cell type to be used for screening is of essential importance and has to be carefully chosen. So far, few attention has been put on selecting a cell type specifically suitable for in vitro testing of materials for predefined applications. In this manuscript, we describe an approach to define a suitable cell type for screening assays, for which biomaterials for bone regeneration served as example. Using a bioinformatics methodology, different cell lines are compared on three well-characterized model materials. The transcriptional profiles of MG63, iMSC, SV-HFO, hPPCT, hBPCT and SW480 cells are assessed on 3 calcium phosphate-based materials to evaluate their potential application in a screening assay. We show that MG63 is the most suitable cell line to evaluate biomaterials for bone regeneration applications, evidenced by their robust gene expression differences between the 3 model materials. The gene expression differences between the cell lines were assessed based on the overall gene expression profiles and specific subsets of genes and pathways related to osteogenesis and bone homeostasis in response to the 3 materials tested. In the next phase, this cell line will be used to identify a target correlating with in vivo biomaterial performance and henceforth to develop an in vitro screening system.

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The Role of WTAP in Regulating Macrophage-Mediated Osteoimmune Responses and Tissue Regeneration in Periodontitis

Project description:The Role of WTAP in Regulating Macrophage-Mediated Osteoimmune Responses and Tissue Regeneration in Periodontitis

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Mgp High-Expressing MSCs Orchestrate the Osteoimmune Microenvironment of Collagen/Nanohydroxyapatite-Mediated Bone Regeneration.

Project description:Activating autologous stem cells after the implantation of biomaterials is an important process to initiate bone regeneration. Although several studies have demonstrated the mechanism of biomaterial-mediated bone regeneration, a comprehensive single-cell level transcriptomic map revealing the influence of biomaterials on regulating the temporal and spatial expression patterns of mesenchymal stem cells (MSCs) is still lacking. Herein, the osteoimmune microenvironment is depicted around the classical collagen/nanohydroxyapatite-based bone repair materials via combining analysis of single-cell RNA sequencing and spatial transcriptomics. A group of functional MSCs with high expression of matrix Gla protein (Mgp) is identified, which may serve as a pioneer subpopulation involved in bone repair. Remarkably, these Mgp high-expressing MSCs (MgphiMSCs) exhibit efficient osteogenic differentiation potential and orchestrate the osteoimmune microenvironment around implanted biomaterials, rewiring the polarization and osteoclastic differentiation of macrophages through the Mdk/Lrp1 ligand-receptor pair. The inhibition of Mdk/Lrp1 activates the pro-inflammatory programs of macrophages and osteoclastogenesis. Meanwhile, multiple immune-cell subsets also exhibit close crosstalk between MgphiMSCs via the secreted phosphoprotein 1 (SPP1) signaling pathway. These cellular profiles and interactions characterized in this study can broaden the understanding of the functional MSC subpopulations at the early stage of biomaterial-mediated bone regeneration and provide the basis for materials-designed strategies that target osteoimmune modulation.

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