Programmable DNA Glue Can Selectively 3D-Print Natural Materials

By relying on specific DNA:DNA interactions as a “smart glue”, we have assembled microparticles into a colloidal gel that can hold its shape. This gel can be extruded with a 3D printer to generate centimeter size objects. We show four aspects of this material:  The colloidal gel material holds its shape after extrusion. The connectivity among the particles is controlled by the binding behavior between the surface DNA and this mediates some control over the microscale structure.  The use of DNA-coated microparticles dramatically reduces the cost of DNA-mediated assembly relative to conventional DNA nanotechnologies and makes this material accessible for macroscale applications.  This material can be assembled under biofriendly conditions and can host growing cells within its matrix. The DNA-based control over organization should provide a new means of engineering bioprinted tissues.

Source: 3D Printing with Nucleic Acid Adhesives

The researchers have developed a series of nanoparticles made of either polystyrene or polyacrylamide that are then coated with DNA.  Yes, packing peanuts…  Don’t start hoarding just yet – it’s pretty basic, but they’re working on more complex structures.  That could mean organs, medications, Star Trek replicators…

The Arbitrary Science of GMO Food Labeling

So far this year, 25 state legislatures have proposed mandatory labeling of genetically modified foods. But a look at existing measures around the country reveals widespread discrepancies over which foods should be included or declared exempt—raising concerns that we’re heading toward a regulatory train wreck.

…Should milk derived from a dairy cow that ate genetically modified feed be labeled a GMO food?

Source: The Dubious Science Of GMO Food Labels

Everything we eat has been shaped by modification of its genetic makeup through slow, haphazard means of selective breeding and hybridization.