scholarly journals Lineage-Specific Chiral Biases of Human Embryonic Stem Cells during Differentiation

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Kathryn E. Worley ◽  
Amanda S. Chin ◽  
Leo Q. Wan
Keyword(s):  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Symmetry Breaking ◽  
Human Embryonic Stem Cells ◽  
Developmental Process ◽  
Current Knowledge ◽  
Embryonic Stem ◽  
Organ Specific ◽  
Biophysical Mechanism ◽  
System Differentiation

Left-right symmetry breaking is a complex developmental process and an important part of embryonic axis development. As of yet, the biophysical mechanism behind LR asymmetry establishment remains elusive for the overall asymmetry of embryos as well as for the organ-specific asymmetry. Here, we demonstrate that inherent cellular chirality is observable in the cells of early embryonic stages using a 3D Matrigel bilayer system. Differentiation of human embryonic stem cells to three lineages corresponding to heart, intestine, and neural tissues demonstrates phenotype-specific inherent chiral biases, complementing the current knowledge regarding organ development. The existence of inherent cellular chirality early in development and its correlation with organ asymmetry implicate cell chirality as a possible regulator in LR symmetry breaking.

304 THE DEVELOPMENTAL TOXICITY EVALUATION OF 5-FLUOROURACIL AND INDOMETHACIN IN HUMAN EMBRYONIC STEM CELLS

2013 ◽  
Vol 25 (1) ◽  
pp. 299
Author(s):  
E. M. Jung ◽  
E. B. Jeung
Keyword(s):  
Stem Cells ◽  
Transcription Factors ◽  
Embryonic Stem Cells ◽  
Human Embryonic Stem Cells ◽  
Developmental Process ◽  
Developmental Toxicity ◽  
Embryonic Stem ◽  
Surface Markers ◽  
Dependent Manner ◽  
Undifferentiated Hesc

Embryonic stem cells have pluripotency and differentiate into and constitute the cells and tissues of our body. In this study, using human embryonic stem cells (hESC), we evaluated novel methods for screening toxicological chemicals during developmental process. We elucidated developmental toxicity of two well-known chemicals, 5-fluorouracil (5-FU) and indomethacin (Indo) in hESC. The undifferentiated hESC were treated with the chemicals (10–4 to 104 µM of 5-FU and Indo) in a dose-dependent manner during 1 to 3 days. Surface markers (SSEA-4, TRA-1-60, and TRA-1-81) expressed only in undifferentiated hESC were monitored by immunocytochemistry to ensure the characterisation of undifferentiated hESC. Moreover, expression of embryonic stem cell-specific genes was assessed with real-time PCR after treatment of 5-FU and Indo (10–2, 100, and102 µM of 5-FU and Indo). The expression of surface markers was not significantly affected by treatment of 5-FU and Indo. The expression of transcription factors (Oct-4, Sox-2, Nanog, and hTERT) was significantly decreased by high concentrations of 5-FU and Indo (102 µM). However, no difference was observed in treatment of low concentration of 5-FU and Indo (10–2 µM). Taken together, these results suggest that 5-FU and Indo have cytotoxic effects, and modulate the expression of transcription factors that have pivotal roles in undifferentiated hESC. Therefore, we suggest that hESC may have potential to test toxicity of chemicals during embryonic developmental stage.

Ethanol alters cell cycle gene expression in human embryonic stem cells

2016 ◽  
Vol 01 (03) ◽  
pp. 201-208 ◽  
Author(s):  
Malini Krishnamoorthy ◽  
Brian Gerwe ◽  
Jamie Heimburg-Molinaro ◽  
Rachel Nash ◽  
Jagan Arumugham ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cell Cycle ◽  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Human Embryonic Stem Cells ◽  
Embryonic Stem ◽  
Cell Cycle Gene ◽  
Cell Cycle Gene Expression
Sign in / Sign up

Export Citation Format

Share Document