Résumé
Objective To obtain comprehensive expression profile of microRNAs(miRNAs)in endometrial cancer stem cells(ECSCs)during differentiation.Methods ECSCs were enriched by spheroid formation and spontaneously differentiated into cancer cells by attached culture.We characterized miRNA expression in ECSCs and its differentiated cells using miRNA microarrays and verified the results by RT-qPCR.Meanwhile,we applied bioinformatic method to predict the target genes of the differentially expressed miRNAs.Furthermore,gene expression profile was detected by genomic microarray.Finally,we summarized the relationship between the predicted target genes of miRNAs and gene expression profile.Results We observed that 10 miRNAs were significantly upregulated in ECSCs,including miR-522,miR-139-3p,miR-520c-5p,miR-518d-5p,miR-146b-5p,miR-34a,miR-526a,miR-193a-3p,miR-221,and miR-4674.Only 1 miRNA,miR-760,was downregulated in ECSCs.A total of 11 differentially expressed miRNAs were identified by RT-qPCR.The results showed these differentially expressed miRNAs(except miR-526a and miR-4674)were in accordance with those obtained by miRNA microarray analysis. By using bioinformatic approach,the target genes of these differentially expressed miRNAs could be found.The results of genomic microarray showed that 207 genes were more highly expressed and 238 genes were more lowly expressed in ECSCs compared with its differentiated cells.Analysis of the gene expression profile and the predicted target genes of miRNAs showed that some common genes except miR-139-3p could be found.Conclusion Our study provides an available information about miRNAs and target genes from different starting points,such as ECSCs differentiation.Further studies are needed to ascertain the role of these miRNAs in ECSCs'differentiation.
Résumé
<p><b>OBJECTIVE</b>To investigate the capacity of human endometrial stromal stem cells for differentiation into osteoblasts and chondroblasts and their potential as seeding cells in bone tissue engineering.</p><p><b>METHODS</b>Human endometrial stromal stem cells were obtained from hysterectomy tissues from 15 women during normal menstrual cycles and induced to differentiate into osteoblasts and chondroblasts. The differentiated cells were examined with cytochemistry.</p><p><b>RESULTS</b>A population of endometrial stromal stem cells was successfully isolated from human endometrial tissue and showed stable proliferation in vitro. After treatment with osteoblast and chondroblast revulsant, the endometrial stromal stem cells differentiated towards osteoblasts were verified by positive staining with alizarin red and towards chondroblasts by positive staining with Alcian blue.</p><p><b>CONCLUSION</b>Endometrial stromal stem cells obtained from human endometrial tissue with multilineage potential can differentiate into osteoblasts and chondroblasts in vitro, and may serve as candidate autogenous seeding cells for bone tissue engineering.</p>