PMID- 26184691 OWN - NLM STAT- MEDLINE DCOM- 20160706 LR - 20181202 IS - 1549-4918 (Electronic) IS - 1066-5099 (Linking) VI - 33 IP - 10 DP - 2015 Oct TI - Single Cell Analysis Reveals Concomitant Transcription of Pluripotent and Lineage Markers During the Early Steps of Differentiation of Embryonic Stem Cells. PG - 2949-60 LID - 10.1002/stem.2108 [doi] AB - The differentiation of embryonic stem cells is associated with extensive changes in gene expression. It is not yet clear whether these changes are the result of binary switch-like mechanisms or that of continuous and progressive variation. Here, I have used immunostaining and single molecule RNA fluorescence in situ hybridization (FISH) to assess changes in the expression of the well-known pluripotency-associated gene Pou5f1 (also known as Oct4) and early differentiation markers Sox1 and T-brachyury in single cells during the early steps of differentiation of mouse embryonic stem cells. I found extensive overlap between the expression of Pou5f1/Sox1 or Pou5f1/T-brachyury shortly after the initiation of differentiation towards either the neuronal or the mesendodermal lineage, but no evidence of correlation between their respective expression levels. Quantitative analysis of transcriptional output at the sites of nascent transcription revealed that Pou5f1 and Sox1 were transcribed in pulses and that embryonic stem cell differentiation was accompanied by changes in pulsing frequencies. The progressive induction of Sox1 was further associated with an increase in the average size of individual transcriptional bursts. Surprisingly, single cells that actively and simultaneously transcribe both the pluripotency- and the lineage-associated genes could easily be found in the differentiating population. The results presented here show for the first time that lineage priming can occur in cells that are actively transcribing a pluripotent marker. Furthermore, they suggest that this process is associated with changes in transcriptional dynamics. CI - (c) 2015 AlphaMed Press. FAU - Lanctot, Christian AU - Lanctot C AD - Institute of Cellular Biology and Pathology, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Stem Cells JT - Stem cells (Dayton, Ohio) JID - 9304532 RN - 0 (Fetal Proteins) RN - 0 (Octamer Transcription Factor-3) RN - 0 (Pou5f1 protein, mouse) RN - 0 (SOXB1 Transcription Factors) RN - 0 (Sox1 protein, mouse) RN - 0 (T-Box Domain Proteins) RN - EQ43SC3GDB (Brachyury protein) SB - IM MH - Animals MH - Cell Differentiation/*genetics MH - Cell Lineage/genetics MH - Embryonic Stem Cells/cytology/*metabolism MH - Fetal Proteins/biosynthesis/genetics MH - Gene Expression Regulation, Developmental MH - In Situ Hybridization, Fluorescence MH - Mice MH - Octamer Transcription Factor-3/biosynthesis/genetics MH - Pluripotent Stem Cells/cytology/*metabolism MH - SOXB1 Transcription Factors/biosynthesis/genetics MH - *Single-Cell Analysis MH - T-Box Domain Proteins/biosynthesis/genetics OTO - NOTNLM OT - Early differentiation OT - Embryonic stem cells OT - Lineage priming OT - Single molecule RNA fluorescence in situ hybridization OT - Transcriptional dynamics EDAT- 2015/07/18 06:00 MHDA- 2016/07/07 06:00 CRDT- 2015/07/18 06:00 PHST- 2014/12/09 00:00 [received] PHST- 2015/05/04 00:00 [revised] PHST- 2015/06/10 00:00 [accepted] PHST- 2015/07/18 06:00 [entrez] PHST- 2015/07/18 06:00 [pubmed] PHST- 2016/07/07 06:00 [medline] AID - 10.1002/stem.2108 [doi] PST - ppublish SO - Stem Cells. 2015 Oct;33(10):2949-60. doi: 10.1002/stem.2108.