Quantitative electron-microscopic analysis reveals glial cell changes in the rat pineal gland post-surgery, suggesting potential hormonal implications.
Glial cells in the rat pineal gland of normal and sham-pinealectomized (SPX) groups were examined electron microscopically, 14 days after surgery. The relative lengths of glial cell membrane profiles adjoining the basal lamina of the perivascular spaces were significantly decreased by surgery. The relative numbers of glial cells showed similar tendency. It is suggested that such anatomical rearrangement may facilitate the release of pineal homone(s) into, and influences of regulatory and/or modulatory substances from, the perivascular spaces.
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Suzuki et al. (2000) studied this question.
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