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ref: Menei-1994.09 tags: microspheres beads polycaprolactone biocompatible drug delivery histology date: 01-27-2013 20:54 gmt revision:3 [2] [1] [0] [head]

PMID-7814435 Fate and biocompatibility of three types of microspheres implanted into the brain.

  • microspheres ( 24μm 24 \mu m ) appear to be engulfed or surrounded by histocytic cells.
  • poly(e-caprolactone), which is supposed to be biodegradable, did not dissolve in the brain. The polymer is hydrophobic.
  • 20um spheres could be engulfed by macrophages; their microspheres were too large, and were encapsulated in a thin coallagen layer and astrocytic process.
  • no scale bars - annoying - but we can estimate the size of the coating to be about the same size as the beads themselves.