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Muscle and bone from an ink-jet printer

A Pittsburgh-based research team has used an innovative inkjet system to print unique "bio-ink" patterns that directed adult muscle-derived stem cells from mice to differentiate into both muscle cells and bone cells.

This is the first report of a system that can pattern the formation of multiple tissues from a single population of adult stem cells.

Bioengineers from Carnegie Mellon University’s Robotics Institute and the Institute for Complex Engineered Systems teamed with stem cell biologists from the University of Pittsburgh School of Medicine and Children’s Hospital of Pittsburgh to demonstrate the use of ink-jet printing to pattern “bio-inks?combinations of growth factors to control the fate of stem cells. Working with mice, the Pittsburgh biologists have gained considerable experience in using growth factors to control proliferation and differentiation in populations of “muscle-derived stem cells,?or MDSCs. Previous work by University of Pittsburgh researchers has demonstrated the ability of MDSCs to repair muscle in a model for Duchenne Muscular Dystrophy, improve cardiac function following heart failure, and heal large bone defects in the skull. Controlling not only what types of cells differentiate from stem cells, but also gaining spatial control of stem cell differentiation, are important capabilities if researchers are to engineer replacement tissues that might be used in treating disease, trauma, or genetic abnormalities. Spatial patterning of stem cell differentiation through delivery of bio-inks with an ink-jet printer will offer the Pittsburgh researchers a whole new level of complexity and control.

The custom built ink-jet printer, which was developed at Carnegie Mellon, can deposit bio-inks in virtually any design, pattern, or concentration, laying down patterns on fibrin-coated slides placed in culture dishes containing MDSCs. Based on pattern, dose, or factor printed by the ink-jet, the MDSCs could be directed when to
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Source:American Society for Cell Biology


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