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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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Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
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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 (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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Efficient Differentiation of Human Pluripotent Stem Cells into Liver Cells
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Patterning Pluripotent Stem Cells at a Single Cell Level.

Marina V Pryzhkova1, Greg M Harris1, Shuguo Ma1

  • 1Department of Chemical Engineering, University of South Carolina, SC 29208, USA.

Journal of Biomaterials and Tissue Engineering
|August 24, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple UV/ozone method for vitronectin micropatterning. This technique enables single human pluripotent stem cells (hPSCs) to attach and maintain pluripotency, advancing regenerative medicine.

Keywords:
Extracellular MatrixMicropatterningPluripotent Stem CellsPolystyreneStress FibersUV/OzoneVitronectin

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Area of Science:

  • Cell Biology
  • Stem Cell Research
  • Biomaterials Science

Background:

  • Cell-extracellular matrix (ECM) interactions are crucial for cellular functions.
  • Current ECM micropatterning methods are complex and limited to somatic cells.
  • Human pluripotent stem cells (hPSCs) require defined ECM and cell-cell contacts, complicating single-cell studies.

Purpose of the Study:

  • To develop a simplified protocol for ECM micropatterning suitable for hPSCs.
  • To investigate hPSC attachment, behavior, and pluripotency maintenance on micropatterned substrates.
  • To overcome limitations of existing micropatterning techniques for hPSC research.

Main Methods:

  • Developed a vitronectin micropatterning protocol using UV/ozone modification of polystyrene.
  • Cultured single hPSCs on micropatterned vitronectin substrates.
  • Analyzed hPSC attachment, stress fiber formation, focal adhesions, and pluripotency marker (OCT4) expression.

Main Results:

  • Single hPSCs successfully attached to micropatterned vitronectin, forming stress fibers and focal adhesions.
  • hPSCs demonstrated responsiveness to extracellular adhesive cues.
  • Micropatterned hPSCs maintained expression of OCT4 for up to 48 hours.

Conclusions:

  • The developed UV/ozone-based vitronectin micropatterning is a simplified and effective method for studying single hPSCs.
  • This technique facilitates the investigation of hPSC behavior and pluripotency in a controlled microenvironment.
  • The findings have potential implications for advancing cell regenerative medicine and tissue engineering.