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ScRNAseq characterization of synovial stromal cells in mouse STIA

ABSTRACT: scRNAseq characterization of synovial stromal cells in mouse STIA

PROVIDER: PRJNA957729 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24225400.fastq.gz	Fastqsanger.gz
	SRR24225401.fastq.gz	Fastqsanger.gz
	SRR24225402.fastq.gz	Fastqsanger.gz
	SRR24225403.fastq.gz	Fastqsanger.gz
	SRR24225404.fastq.gz	Fastqsanger.gz

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scRNAseq characterization of synovial stromal cells in mouse STIA

Project description:Objective: Upregulation of glycolysis and glutaminolysis in the rheumatoid arthritis fibroblast-like synoviocytes (RAFLS) has already been established by existing literature . Henceforth, this study was undertaken to determine if dual inhibition of these processes by novel phytobiologic c28MS have the potential of promising synergistic therapy for rheumatoid arthritis by targeting the underlying metabolic reprogramming as existing treatment strategies for RA do not target dual inhibition. Methods: Gene associations with HK2 and GLS expression were identified by examining murine and human available scRNA-seq. The metabolic profile of FLS cells was determined by 1H magnetic resonance spectroscopy under conditions of glycolytic and glutaminolysis inhibition and HK2 and GLS1 expression was evaluated by western blot. FLS functional analysis was conducted under similar inhibitory conditions. ELISA was employed for the quantification of pivotal markers namely IL6, CCL2 and MMP3. For arthritis experiments, mice were injected with K/BxN sera on Day 0 and treated for 10 days. Results: scRNAseq data identified... Metabolomic and functional analysis revealed that c28MS had the potential of checking the aggressive behavior of RAFLS by targeting upregulated glycolysis and glutaminolysis thereby inhibiting them. Target expression remained unaffected by the action of the dual inhibitor suggesting only potential blockage. Furthermore, the compound was able to inhibit inflammatory arthritis by decreasing the clinical score and paw inflammation in the K/BxN model. Conclusion: Our findings imply that dual inhibition of glycolysis and glutaminolysis could be an effective strategy in the treatment of RA with chances of greater remission. It also suggests that targeting more than one pathway in the metabolome can be a novel treatment approach in non-cancer scenarios.

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Project description:We tested the role of distinct STM populations in the modulation of synovial tissue environment in ex vivo STM-FLS micro co-cultures. We first FACS-sorted total synovial tissue fibroblasts as we described previously from biopsies of RA patients. FLS were seeded at 3000/well alone or in contact with either 3000/well FACS-sorted MerTK/CD206neg or MerTK/CD206pos STMs from patients with active or remission RA respectively for 48h. The modulatory effect on the FLS was evaluated by comparing their expression of 446 immune/stromal genes (scRNAseq BD Rhapsody) 32,141 FLS were evaluated. FLS cells cultured alone exhibited 4 distinct activation states: FLS cluster 1 (FLS1) expressed extracellular matrix proteins (e.g. COL1A1, COL1A2) and TGFb (TGFBI, TGFB3); FLS2 expressed cell adhesion molecules (e.g. ITGB2, SELPLG); FLS3 expressed receptors for TGFb and resolvin (e.g.CMKLR1 and TGFBR1); and FLS4 expressed high levels of glycolytic enzymes and proliferation markers (e.g. LDHA, PGK1, ENO1 and PCNA). Interestingly, upon co-culture with MerTK/CD206neg an additional fifth cluster (FLS5) emerged with inflammatory properties In contrast to inflammatory effect of the MerTK/CD206neg STMs on FLS, the MerTK/CD206pos population, especially that isolated from biopsies of RA patients in sustained disease remission, induced repair response of FLS as manifested by increased expression of collagens (e.g. COL1A) and TGFb response genes (e.g. TGFBI) Importantly, MerTK/CD206neg and MerTK/CD206pos STMs isolated from the biopsies of the same patient (either with active RA or RA in remission) elicited these divergent FLS responses. These suggest that these two distinct STM populations play opposing role in synovium (pro-inflammatory versus protective).

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