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The conversion of state-space representation to a transfer function is a fundamental process in system analysis. It provides a method for transitioning from a time-domain description to a frequency-domain representation, which is crucial for simplifying the analysis and design of control systems.
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Functional Equivalency in Human Somatic Cell Nuclear Transfer-Derived Endothelial Cells.

Soon-Jung Park1, Ji-Heon Lee1, Seul-Gi Lee1

  • 1Department of Stem Cell Biology, Konkuk University, School of Medicine, Seoul, Republic of Korea.

Stem Cells (Dayton, Ohio)
|February 6, 2019
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Summary

Human nuclear transfer embryonic stem cells (hNT-ESCs) successfully differentiated into functional endothelial cells. These cells restored blood flow in ischemic limbs, showing therapeutic potential for regenerative medicine.

Keywords:
Cell therapyCell transplantationEndothelial cellHuman somatic cell nuclear transferIschemia

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Area of Science:

  • Regenerative Medicine
  • Stem Cell Biology
  • Vascular Biology

Background:

  • Somatic cell nuclear transfer (SCNT) in human embryonic stem cells (hESCs) has renewed interest in therapeutic cloning.
  • The functional capacity of CHA-NT4 cells, derived via SCNT, requires thorough investigation for potential therapeutic applications.

Purpose of the Study:

  • To differentiate CHA-NT4 cells into endothelial cells (ECs).
  • To assess the in vitro and in vivo functionality of these derived ECs.
  • To compare the potential of CHA-NT4 derived ECs with established hESC-derived ECs.

Main Methods:

  • Embryoid body formation of CHA-NT4 cells using a microwell system optimized for hESC-EC differentiation.
  • Isolation and characterization of CD31+ cells.
  • In vitro assessment of endothelial characteristics (morphology, tubule formation, ac-LDL uptake).
  • In vivo transplantation into hind limb ischemic mice to evaluate therapeutic efficacy.

Main Results:

  • Isolated CD31+ cells displayed characteristic endothelial morphology, formed tubules, and took up ac-LDL.
  • Transplantation of CHA-NT4-derived ECs (hNT-ESC-ECs) into ischemic mice successfully rescued hind limbs and restored blood perfusion.
  • The functional outcomes of hNT-ESC-ECs were comparable to those of hESC-ECs.

Conclusions:

  • CHA-NT4 derived ECs are functionally equivalent to hESC-derived ECs.
  • Human SCNT-ESC research holds promise for regenerative medicine and offers insights into cellular behavior related to donor factors.
  • Further studies comparing CHA-NT4 derivatives with other pluripotent stem cells are warranted.