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Characterization and regulation of osteoclast precursors following chronic Porphyromonas gingivalis infection

ABSTRACT: Characterization and regulation of osteoclast precursors following chronic Porphyromonas gingivalis infection

PROVIDER: PRJNA641023 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12066693_1.fastq.gz	Fastqsanger.gz
	SRR12066693_2.fastq.gz	Fastqsanger.gz
	SRR12066694_1.fastq.gz	Fastqsanger.gz
	SRR12066694_2.fastq.gz	Fastqsanger.gz
	SRR12066695_1.fastq.gz	Fastqsanger.gz

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Characterization and regulation of osteoclast precursors following chronic Porphyromonas gingivalis infection

Project description:Bone destruction in inflammatory osteolytic diseases including periodontitis is related to excessive activity of osteoclasts (OC), which originate from precursor cells of the myeloid lineage, termed osteoclast precursors (OCP). In contrast to ample knowledge that we currently have on mature OC, little is known about OCP and their regulation during bacterial infection. Therefore, this study aimed to identify and characterize OCP following chronic infection with a periodontal bacteria Porphyromonas gingivalis (Pg). We used a micro-osmotic pump to continually release Pg subcutaneously in a murine model. Two weeks after Pg infection, the frequency of CD11b+c-fms+Ly6Chi population is significantly elevated within the bone marrow, spleen and peripheral blood. In vitro and in vivo studies identified these cells as the OCP-containing population and Pg infection significantly enhanced the osteoclastogenic activity of these cells. Furthermore, mRNA sequencing analysis indicated a unique gene and pathway profile in CD11b+c-fms+Ly6Chi population following Pg infection, with changes in genes and pathways related to OC differentiation, cell proliferation and apoptosis, inflammatory response, phagocytosis and immunity, as well as antigen processing and presentation. Moreover, using IL-6 knockout mice, we found that IL-6 is important for Pg-induced accumulation of CD11b+c-fms+Ly6Chi population from the bone marrow and periphery. Our results provide new insights into the characterization and regulation of OCP following a chronic bacterial infection. This knowledge is relevant to the understanding of the pathogenesis of bacteria-induced bone loss, and to the identification of potential therapeutic targets of bone loss diseases.

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Project description:Porphyromonas gingivalis and Treponema denticola are periodontalpathogens that are associated with the severity and progression of periodontal diseases. This study investigates the gene expression of Porphyromonas gingivalis during co-culture with Treponema denticola

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Characterization and regulation of osteoclast precursors following chronic <i>Porphyromonas gingivalis</i> infection.

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