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Updated: Jul 14, 2025
Isolation and Profiling of MicroRNA-containing Exosomes from Human Bile
Published on: June 13, 2016
Analysis of miRNA expression profiles in exosomes of SMB-S15 cells treated with resveratrol
Qiang Shi1, Lina Zhang2, Xiemusiye Wulayin2
1Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, 101100, China.
Abstract:
Exosomes are double-layered vesicle bodies secreted by cells, in which microRNAs (miRNAs) play an important role. In a previous study, we found that treatment of the prion-infected cell line SMB-S15 with resveratrol can effectively inhibit the propagation of PrPSc in vitro and eliminate its infectivity in vivo. In this study, the global expression profiles of miRNAs in extracellular exosomes during resveratrol clearance of PrPSc in SMB-S15 cells were analyzed. Extracted exosomal miRNAs from the prion-infected cell line SMB-S15 (S15) and its normal partner cell line SMB-PS (PS) as well as SMB-S15 cells exposed to resveratrol for 4 days (RES4) and 8 days (RES8) were subjected into deep sequencing. Similarities and differences in the levels of differentially expressed miRNAs as well as the signaling pathways that are potentially involved were comparatively analyzed. The possible influences on the expression of genes affected by changes in exosomal miRNAs in the context of the prion pathway were further analyzed. These alterations in exosomal miRNA levels may help us to understand the functional transmission of intercellular messages and the pathogenesis of prion biology and prion disease.
Insights
Resveratrol treatment alters exosomal microRNAs (miRNAs) in prion-infected cells, offering insights into prion disease pathogenesis and intercellular communication. This study analyzes miRNA expression changes during prion clearance.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Exosomes are crucial intercellular communicators, carrying microRNAs (miRNAs) that regulate gene expression.
- Resveratrol has previously shown efficacy in inhibiting prion propagation (PrPSc) in vitro and in vivo.
- Understanding exosomal miRNA changes during prion disease is vital for therapeutic development.
Purpose of the Study:
- To investigate global exosomal miRNA expression profiles in prion-infected cells treated with resveratrol.
- To identify differentially expressed miRNAs and associated signaling pathways involved in prion clearance.
- To explore the impact of altered exosomal miRNAs on gene expression within the prion pathway.
Main Methods:
- Deep sequencing of exosomal miRNAs from prion-infected (SMB-S15) and control (SMB-PS) cell lines.
- Analysis of miRNA expression in cells treated with resveratrol for 4 and 8 days (RES4, RES8).
- Comparative analysis of miRNA levels, signaling pathways, and gene expression influences.
Main Results:
- Identified significant alterations in exosomal miRNA expression profiles following resveratrol treatment.
- Revealed differentially expressed miRNAs and potential signaling pathways implicated in prion clearance.
- Provided insights into how exosomal miRNA changes affect gene expression relevant to prion disease.
Conclusions:
- Resveratrol treatment induces specific changes in exosomal miRNA content during prion clearance.
- Exosomal miRNAs play a role in intercellular communication and prion pathogenesis.
- These findings contribute to understanding prion biology and may inform therapeutic strategies for prion diseases.
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