Oligodendrocyte Precursor Cell Medium (OPCM) is a complete medium designed for optimal growth of normal human oligodendrocyte precursor cells in vitro.
The permeability of blood-brain barrier (BBB) was detected by Evans Blue (EB) leakage method, and the ultrastruncture of BBB, which contained astroglia, was observed under electron microscopy.
Note the clear vacuoles in the colloid next to the epithelium where the increased activity of the epithelium to produce increased thyroid hormone has led to scalloping out of the colloid.