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MicroRNAs can effectively induce formation of insulin-producing cells from mesenchymal stem cells
Chunyu Bai1, Yuhua Gao1, Xiangchen Li1
1Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
Abstract:
MicroRNAs regulate insulin secretion, pancreatic development and beta cell differentiation. However, the function of microRNAs in the formation of insulin-producing cells (IPCs) from adult stem cells is poorly understood. We examine the microRNA expression profile in nestin-positive umbilical cord-derived mesenchymal stem cells (N-UCMSCs) and nestin-positive pancreatic mesenchymal stem cells using a deep sequencing approach. We also selected specific microRNAs for overexpression in N-UCMSCs and found that miR-375 and miR-26a induced IPCs differentiation from N-UCMSCs by downregulating target genes including mtpn, sox6, bhlhe22 and ccnd1. Small interfering RNAs were also used to knock down these genes in N-UCMSCs to induce the formation of IPCs. These results suggest that endogenous microRNAs involved in the formation of IPCs from adult stem cells show promise for advancing the development of an effective cell transplant therapy for diabetes. Copyright © 2017 John Wiley & Sons, Ltd.
Insights
Specific microRNAs, miR-375 and miR-26a, promote the differentiation of insulin-producing cells (IPCs) from adult stem cells. This discovery offers potential for new diabetes cell transplant therapies.
Area of Science:
- Stem cell biology
- Molecular endocrinology
- Regenerative medicine
Background:
- MicroRNAs (miRNAs) are crucial regulators of pancreatic development and beta cell function.
- The role of miRNAs in generating insulin-producing cells (IPCs) from adult stem cells remains largely unknown.
- Understanding these mechanisms is key for advancing diabetes cell therapies.
Purpose of the Study:
- To investigate the microRNA expression profile in stem cells relevant to IPC differentiation.
- To identify specific miRNAs capable of inducing IPC formation from adult stem cells.
- To explore the therapeutic potential of miRNA-mediated stem cell differentiation for diabetes.
Main Methods:
- Deep sequencing was employed to analyze miRNA expression in nestin-positive umbilical cord-derived mesenchymal stem cells (N-UCMSCs) and pancreatic stem cells.
- Overexpression of selected miRNAs (miR-375, miR-26a) in N-UCMSCs was performed.
- Knockdown of target genes (mtpn, sox6, bhlhe22, ccnd1) using small interfering RNAs (siRNAs) was conducted.
Main Results:
- Specific miRNAs, namely miR-375 and miR-26a, were identified as potent inducers of IPC differentiation from N-UCMSCs.
- These miRNAs exert their effect by downregulating key target genes involved in cell differentiation.
- Successful induction of IPC formation was also achieved by silencing these target genes directly.
Conclusions:
- Endogenous microRNAs play a significant role in the differentiation of adult stem cells into IPCs.
- miR-375 and miR-26a are key regulators in this process, offering therapeutic targets.
- These findings hold promise for developing effective cell transplant strategies for diabetes treatment.