since it is difficult to sort out the possible contributions of these diverse components of the extracellular environment to axonal guidance in vivo , i have developed an in vitro system to study neurite outgrowth on two classes of cells which may provide as substrates for growing axons during development or regeneration : glial cells , e.g. , astrocytes and schwann cells , and nonglial cells , e.g. , fibroblasts .
C0007634
cells
C0016030
fibroblasts