Neuronal transfection using particle-mediated gene transfer.

This unit describes the use of particle-mediated gene transfer (also known as biolistics) for the transfection of neuronal cell lines and brain slices. Like nuclear microinjection of DNA, biolistics results in the direct introduction of DNA into the nucleus; it is perhaps for this reason that biolistics works as well in mitotic cells as in postmitotic cells such as skeletal muscle, skin, liver, and neurons. The basic principle of biolistics is to accelerate micron-sized gold particles coated with DNA towards target cells or tissue. Cells penetrated by these particles have a high likelihood of being transfected by the DNA thus introduced. The motive force for particle acceleration can come from a variety of sources, the most widely used is described in this unit and is a supersonic shock wave generated by the rupture of a kapton membrane induced by high-pressure helium. Another option included in this unit is to propel the gold particles by gas jet entrainment.