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Microrna Profiling During Germline Differentiation of Mouse Embryonic Stem Cells Publisher Pubmed



Ebrahimzadehvesal R1 ; Shokrgozar MA2 ; Nayernia K3 ; Teimooritoolabi L4 ; Estiar MA5 ; Miryounesi M6 ; Nourashrafeddin S7 ; Modarressi MH5
Authors
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Authors Affiliations
  1. 1. Department of Basic Medical Science, Faculty of Medicine, Neyshabur University of Medical Science, Neyshabur, Iran
  2. 2. National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
  3. 3. Institute of Human Genetics, North East England, Stem Cell Institute, International Center for Life, Newcastle University, Newcastle, United Kingdom
  4. 4. Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Iran
  5. 5. Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Genomic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  7. 7. Department of Clinical Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran

Source: Cellular and Molecular Biology Published:2015


Abstract

MicroRNAs are new classes of small non-coding regulatory RNAs which control degradation or suppress translation of its target mRNAs by sequence complementarity. Mature microRNAs are enriched in embryonic stem cells and play important roles in controlling stem cell self-renewal as well as control of differentiation. There is significant evidence that microRNAs are involved in the regulation of stem cell differentiation. The male mouse Embryonic Stem Cell line C57BL6/J with normal karyotype 46, XY was used for profiling microRNA expression in undifferentiated mouse embryonic stem cells (mESCs) and mESCs which were differentiated to germ line cells to determine and compare differences in microRNA expression before and after differentiation. Also, testis tissue samples of a 5-day-old mouse and a mature mouse was used as in vivo control. Profiling was performed by quantitative real-time PCR using locked nucleic acid microRNA-specific LNATM-enhanced primers. After data analysis and comparison of results profiled microRNAs expression, three microRNAs, mmu-miR-21, mmu-miR-21* and mmu-miR-16 showed 50.31, 43.76 and 46.77-fold change increase of expression, respectively, in differentiated mESCs in comparison with undifferentiated state with significant p-value (Average p-value p<0.001 for each members of microRNAs). Expression of Let-7 microRNA family increased in differentiated state when compared with undifferentiated mESCs (Average p-value<0.0001 for each members of family). The levels of expression all other profiled microRNAs were significantly higher in undifferentiated in comparison with differentiated mESCs and their expression was down regulated after differentiation. (Average p-value <0.003 for each members of microRNAs). © 2015.
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