Summary
The rodent Harderian gland is an important site of porphyrin biosynthesis and storage. Porphyrins are visible at the light and electron microscope level as large intraluminal accretions, as large interstitial accretions surrounded by foreign body giant cells, or as small interstitial deposits within free macrophages. Since porphyrins are soluble in a wide range of solvents, it is important to employ histological routines which minimize porphyrin loss during processing in addition to giving good tissue preservation. In this quantitative investigation, these requirements were optimally achieved with fixation in 3% buffered glutaraldehyde and the use of amyl acetate as a clearing agent.
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Spike, R.C., McGadey, J., Johnston, H.S. et al. The prevention of porphyrin loss from tissues during routine histological processing: Quantitative studies on the Harderian gland. Histochem J 18, 245–250 (1986). https://doi.org/10.1007/BF01676234
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DOI: https://doi.org/10.1007/BF01676234