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Melatonin inhibits fibroblast cell functions and hypertrophic scar formation by enhancing autophagy through the MT2 receptor-inhibited PI3K/Akt /mTOR signaling

ABSTRACT: Melatonin inhibits fibroblast cell functions and hypertrophic scar formation by enhancing autophagy through the MT2 receptor-inhibited PI3K/Akt /mTOR signaling

PROVIDER: PRJNA785978 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17120728_1.fastq.gz	Fastqsanger.gz
	SRR17120728_2.fastq.gz	Fastqsanger.gz
	SRR17120729_1.fastq.gz	Fastqsanger.gz
	SRR17120729_2.fastq.gz	Fastqsanger.gz
	SRR17120730_1.fastq.gz	Fastqsanger.gz

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Project description:Hypertrophic scars, which result from aberrant fibrosis and disorganized collagen synthesis by skin fibroblasts, emerge due to disrupted wound healing processes. These scars present significant psychosocial and functional challenges to affected individuals. The current treatment limitations largely arise from an incomplete understanding of the underlying mechanisms of hypertrophic scar development. Recent studies, however, have shed light on the potential of exosomal non-coding RNAs interventions to mitigate hypertrophic scar proliferation. This research assesses the impact of exosomes derived from adipose-derived stem cells (ADSCs-Exos) on hypertrophic scar formation using a rabbit ear model. We employed Hematoxylin and Eosin staining, Masson’s Trichrome staining, and Immunohistochemical staining techniques to track scar progression. Our comprehensive analysis encompassed the differential expression of non-coding RNAs, enrichment analyses of functional pathways, protein-protein interaction studies, and miRNA-mRNA interaction investigations. The results reveal a marked alteration in the expression levels of long non-coding RNAs and microRNAs following ADSCs-Exos treatment, with little changes observed in circular RNAs. Notably, miR-194 emerges as a critical regulator within the signaling pathways that govern hypertrophic scar formation. Dual-luciferase assays indicated a significant reduction in the promoter activity of TGF-β1 after miR-194 overexpression. Quantitative reverse transcription PCR and Western blotting assays further validated the decrease in TGF-β1 expression in the treated samples. Moreover, the treatment resulted in diminished levels of inflammatory markers IL-1β, TNF-α, and IL-10. In vivo evidence strongly supports the role of miR-194 in attenuating hypertrophic scar formation through the suppression of TGF-β1. Our findings endorse the strategic use of ADSCs-Exos, particularly through miR-194 modulation, as an effective strategy for reducing scar formation and lowering pro-inflammatory and fibrotic indicators like TGF-β1. Therefore, this study advocates for the targeted application of ADSCs-Exos, with an emphasis on miR-194 modulation, as a promising approach to managing proliferative scarring.

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Melatonin inhibits fibroblast cell functions and hypertrophic scar formation by enhancing autophagy through the MT2 receptor-inhibited PI3K/Akt /mTOR signaling

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