PRECURSOR STEM CELLS TECHNOLOGIES INC.
 
 
 
DIFFERENCES BETWEEN PRECURSOR STEM CELLS AND EMBRYONIC STEM CELLS
 
  Precursor
  Embryonic
  Stability
  Somewhat stable
  unstable due to oncogenicity
  Treatment used
  > 70 years and about 1 million patients treated with sufficient data
  < 70 years
  Attainability
  Easy and safe from a fetus in natural environment
  Exist only in a laboratory dish and not in a living embryo
  Origin
  Animal-abundantly available
  Human-rare
  Renewal
  Long term self renewal
  Self renewal except in cancer cases
  Method of Preparation
  Based on primary tissue culture of tissue fragments or cell clusters.
  Based on primary cell culture of dispersed cells