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Related Concept Videos

Embryonic Stem Cells00:58

Embryonic Stem Cells

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Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
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Embryonic Stem Cells00:57

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Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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A cell line is a population of cells grown in vitro that can be subcultured over several generations. Normal cells cease to divide after a certain number of cell divisions, a process known as replicative senescence. This number, called the Hayflick limit, was conceptualized by Leonard Hayflick in 1961 when he observed that fetal cells grown in culture could only divide 40-60 times. This limit is due to the shortening of the telomeres during each round of cell division, preventing cell division...
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Apart from the measures of central tendency, distribution, outliers, and the changing characteristics of data with time, an important characteristic of any data set is its variation or spread. In some data sets, the data values are concentrated closely near the mean; in others, the data values are more widely spread out from the mean.
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Efficient Neural Differentiation using Single-Cell Culture of Human Embryonic Stem Cells
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Transcriptome variations among human embryonic stem cell lines are associated with their differentiation propensity.

Changbin Sun1,2,3, Jiawen Zhang2,3, Dongmin Zheng2,3

  • 1BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.

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Human embryonic stem cell (hESC) lines show varying differentiation efficiencies due to distinct gene expression profiles. These variations influence developmental processes and lineage specification, impacting their use in research and medicine.

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Area of Science:

  • Stem cell biology
  • Genomics
  • Developmental biology

Background:

  • Human embryonic stem cells (hESCs) are crucial for regenerative medicine, drug screening, and modeling diseases.
  • Variations in differentiation efficiency among hESC lines limit their reliable application.
  • The molecular basis for these observed differences in hESC potency remains largely unknown.

Purpose of the Study:

  • To investigate transcriptome variations among different human embryonic stem cell lines.
  • To identify differentially expressed genes (DEGs) and their enrichment in developmental pathways.
  • To understand how gene expression differences contribute to lineage bias in hESCs.

Main Methods:

  • Comparative transcriptome analysis of four human embryonic stem cell lines (H7, HUES1, HUES8, HUES9).
  • Identification and analysis of differentially expressed genes (DEGs) across the cell lines.
  • Functional enrichment analysis of DEGs to determine involvement in developmental processes.

Main Results:

  • Significant differences in gene expression profiles were observed among the four hESC lines.
  • DEGs were significantly enriched in pathways related to ectodermal, mesodermal, and endodermal development.
  • Variations in pluripotency factors and signaling transduction genes correlated with observed lineage biases.
  • Differences in gene expression patterns suggest distinct mechanisms for maintaining pluripotency and lineage specification.

Conclusions:

  • Gene expression heterogeneity among hESC lines underlies their differential differentiation potential.
  • Understanding these molecular variations is key to optimizing hESC use in regenerative medicine and disease modeling.
  • Distinct regulatory mechanisms may govern pluripotency maintenance and lineage commitment in different hESC lines.