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“Synaptic” Ribbons in the Pineal Gland of the Horse
Author(s) -
Karasek M.,
Cozzi B.
Publication year - 1990
Publication title -
journal of pineal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.881
H-Index - 131
eISSN - 1600-079X
pISSN - 0742-3098
DOI - 10.1111/j.1600-079x.1990.tb00895.x
Subject(s) - pinealocyte , pineal gland , ultrastructure , biology , horse , organelle , melatonin , anatomy , endocrinology , microbiology and biotechnology , paleontology
Previous studies on the ultrastructure of the horse pineal gland did not report the presence of “synaptic” ribbons, functionally enigmatic pinealocyte organelles regularly occurring in other mammalian species. The aim of the present study was to reinvestigate the horse pinealocyte in this respect. Careful investigations here reported allowed detection of “synaptic” ribbons in the pinealocytes of all the examined animals, although in a relatively low number (5.4 ± 2.0 per 20,000 μ 2 of pineal tissue; mean ± SD). The ultrastructure of “synaptic” ribbons in pinealocytes of the horse resembles closely that observed in other mammalian species.