Publication: Innervation of the cat pineal gland by neuropeptide Y-immunoreactive nerve fibers: an experimental immunohistochemical study
Issued Date
1994-06-01
Resource Type
ISSN
14320878
0302766X
0302766X
Other identifier(s)
2-s2.0-0028363710
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Mahidol University
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SCOPUS
Bibliographic Citation
Cell & Tissue Research. Vol.276, No.3 (1994), 545-550
Suggested Citation
Morten Møller, Pansiri Phansuwan-Pujito, Sarita Pramaulkijja, Naiphinich Kotchabhakdi, Piyarat Govitrapong Innervation of the cat pineal gland by neuropeptide Y-immunoreactive nerve fibers: an experimental immunohistochemical study. Cell & Tissue Research. Vol.276, No.3 (1994), 545-550. doi:10.1007/BF00343951 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/9510
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Title
Innervation of the cat pineal gland by neuropeptide Y-immunoreactive nerve fibers: an experimental immunohistochemical study
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Abstract
An immunohistochemical study of the cat pineal gland was performed using a rabbit polyclonal antibody directed against neuropeptide Y (NPY) and an antibody directed against the C-terminal flanking peptide of neuropeptide Y (CPON). Numerous NPY- and CPON-immunoreactive (IR) nerve fibers were demonstrated throughout the gland and in the pineal capsule. The number of IR nerve fibers in the capsule was high and from this location fibers were observed to penetrate into the gland proper via the pineal connective tissue septa, often following the blood vessels. From the connective tissue septa IR fibers intruded into the parenchyma between the pinealocytes. Many IR nerve fibers were observed in the pineal stalk and in the habenular as well as the posterior commissural areas. The number of NPY/CPON-IR nerve fibers in pineal glands from animals bilaterally ganglionectomized two weeks before sacrifice was low. The source of most of the extrasympathetic NPY/CPONergic nerve fibers is probably the brain from where they enter the pineal via the pineal stalk. However, an origin of some of the fibers from parasympathetic ganglia cannot be excluded due to the presence of a few IR fibers in the pineal capsule of ganglionectomized animals. It is concluded that the cat pineal is richly innervated with NPYergic nerve fibers mostly of sympathetic origin. The posttranslational processing of the NPY promolecule results in the presence of both NPY and CPON in intrapineal nerve fibers. © 1991 Springer-Verlag.