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Immune system modulation by the adjuvants Poly (I:C) and Montanide ISA 720

ABSTRACT: Immune system modulation by the adjuvants Poly (I:C) and Montanide ISA 720

PROVIDER: PRJNA839078 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19251902_1.fastq.gz	Fastqsanger.gz
	SRR19251902_2.fastq.gz	Fastqsanger.gz
	SRR19251903_1.fastq.gz	Fastqsanger.gz
	SRR19251903_2.fastq.gz	Fastqsanger.gz
	SRR19251904_1.fastq.gz	Fastqsanger.gz

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Immune system modulation by the adjuvants Poly (I:C) and Montanide ISA 720

Project description:We investigated the immune phenotypes induced by Poly (I:C) and Montanide ISA 720 in the context of mice immunization with a recombinant protein based on the Plasmodium vivax circumsporozoite protein sequence.

2022-05-22 | GSE203218 | GEO

Immune System Modulation by the Adjuvants Poly (I:C) and Montanide ISA 720.

Project description:Adjuvants are essential for vaccine development, especially subunit-based vaccines such as those containing recombinant proteins. Increasing the knowledge of the immune response mechanisms generated by adjuvants should facilitate the formulation of vaccines in the future. The present work describes the immune phenotypes induced by Poly (I:C) and Montanide ISA 720 in the context of mice immunization with a recombinant protein based on the Plasmodium vivax circumsporozoite protein (PvCSP) sequence. Mice immunized with the recombinant protein plus Montanide ISA 720 showed an overall more robust humoral response, inducing antibodies with greater avidity to the antigen. A general trend for mixed Th1/Th2 inflammatory cytokine profile was increased in Montanide-adjuvanted mice, while a balanced profile was observed in Poly (I:C)-adjuvanted mice. Montanide ISA 720 induced a gene signature in B lymphocytes characteristic of heme biosynthesis, suggesting increased differentiation to Plasma Cells. On the other hand, Poly (I:C) provoked more perturbations in T cell transcriptome. These results extend the understanding of the modulation of specific immune responses induced by different classes of adjuvants, and could support the optimization of subunit-based vaccines.

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miRNA-720 controls stem cell phenotype, proliferation and differentiation of dental pulp cells

Project description:Dental pulp cells (DPCs) are known to be enriched in stem/progenitor cells but not well characterized yet. Small non-coding microRNAs (miRNAs) have been identified to control protein translation, mRNA stability and transcription, and have been reported to play important roles in stem cell biology, related to cell reprogramming, maintenance of stemness and regulation of cell differentiation. In order to characterize dental pulp stem/progenitor cells and its mechanism of differentiation, we herein sorted stem-cell-enriched side population (SP) cells from human DPCs and periodontal ligament cells (PDLCs), and performed a locked nucleic acid (LNA)-based miRNA array. As a result, miR-720 was highly expressed in the differentiated main population (MP) cells compared to that in SP cells. In silico analysis and a reporter assay showed that miR-720 targets the stem cell marker NANOG, indicating that miR-720 could promote differentiation of dental pulp stem/progenitor cells by repressing NANOG. Indeed, gain-and loss-of-function analyses showed that miR-720 controls NANOG transcript and protein levels. Moreover, transfection of miR-720 significantly decreased the number of cells positive for the early stem cell marker SSEA-4. Concomitantly, mRNA levels of DNA methyltransferases (DNMTs), which are known to play crucial factors during stem cell differentiation, were also increased by miR-720 through unknown mechanism. Finally, miR-720 decreased DPC proliferation as determined by immunocytochemical analysis against ki-67, and promoted odontogenic differentiation as demonstrated by alizarin red staining, as well as alkaline phosphatase and osteopontin mRNA levels. Our findings identify miR-720 as a novel miRNA regulating the differentiation of DPCs.

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miRNA-720 regulates stem cell phenotype, proliferation and differentiation of dental pulp cells

Project description:Small non-coding microRNAs (miRNAs) are known to play crucial roles in stem cell biology, related to cell reprogramming, maintenance of stemness and regulation of cell differentiation. In an attempt to search for novel miRNAs that can control the fate of dental tissue-derived stem cells, we sorted side population (SP) cells, known to be enriched in stem cells, from dental pulp cells (DPCs) and periodontal ligament cells (PDLCs), and performed a miRNA array. As a result, miR-200b and miR-607 were highly expressed in SP cells, whereas miR-1260b and miR-720 was highly expressed in the differentiated main population (MP) cells. Of note, gain-and-loss of function analysis showed that miR-720 regulates the expression of pluripotency factor NANOG and DNA methyltransferases DNMT3A, DNMT3B and DNMT1 in DPCs. Knockdown of miR-720 significantly increased the levels of NANOG as well as the number of cells positive to the stem cell marker SSEA-4, but down-regulated the levels of DNMTs. miR-720 also regulated the proliferation of DPCs as determined by immunocytochemical analysis against ki-67, as well as odontogenic differentiation demonstrated by alizarin red staining, alkaline phosphatase activity and osteopontin mRNA level. Our findings identify mi-720 as a novel miRNA involved in the regulation of stem cell fate of DPCs. Two cell types (dental pulp cells(DPCs), periodontal ligament cells(PDLCs)) were sorted by FACS to isolate side population (SP) and main population (MP) cells. Then a microRNA array was performed with the SP and MP cells of DPCs and PDLCs.

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