The pineal organ of Raja clavata: Opsin immunoreactivity and ultrastructure

I. Vigh-Teichmann, B. Vígh, M. J. Manzano e Silva, B. Aros

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The pineal organ of Raja clavata was studied by light and electron microscopy, including the immunocytochemical antiopsin reaction. The pineal organ of the ray consists of three portions: (i) a large proximal pineal, (ii) a long tube-like connecting stalk, and (iii) a short distal terminal enlargement. This latter end-vesicle lies in the deep connective tissue layers of the braincase. All portions of the pineal are composed of pinealocytes, intrinsic neurons, ependymal/glial cells, and bundles of nerve fibers embedded in thin neuropil formations. The inner segments of the pinealocytes protrude into the lumen in all parts of the organ and usually contain basal bodies and numerous mitochondria. Often, two outer segments were found to arise from the basal bodies of a single inner segment. By means of light-microscopic immunocytochemistry the outer segments showed a strong antiopsin reaction. The axons of the pinealocytes form ribbon-containing synapses on dendritelike profiles, which appear to belong to the intrinsic pineal neurons. There are other axo-dendritic synapses established by presynaptic terminals lacking ribbons and containing granular and synaptic vesicles. Pineal neurons may contain granular vesicles approximately 60-100 nm in diameter; their processes contribute to the bundles of unmyelinated axons. The fine structural organization of the pineal organ and the opsin immunoreactivity of the outer segments of the pinealocytes indicate a photoreceptive capacity of the organ. The double outer segments represent a peculiar multiplication of the photoreceptor structures.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
JournalCell and Tissue Research
Volume228
Issue number1
DOIs
Publication statusPublished - Jan 1983

Fingerprint

Skates (Fish)
Opsins
Basal Bodies
Neurons
Synapses
Axons
Light
Mitochondria
Neuropil
Synaptic Vesicles
Presynaptic Terminals
Nerve Fibers
Neuroglia
Connective Tissue
Electron microscopy
Optical microscopy
Electron Microscopy
Immunohistochemistry
Tissue
Fibers

Keywords

  • Elasmobranch (Raja clavata)
  • Electron microscopy
  • Opsin immunoreactivity
  • Pineal organ
  • Pineal photoreceptors

ASJC Scopus subject areas

  • Anatomy
  • Clinical Biochemistry
  • Cell Biology

Cite this

The pineal organ of Raja clavata : Opsin immunoreactivity and ultrastructure. / Vigh-Teichmann, I.; Vígh, B.; Manzano e Silva, M. J.; Aros, B.

In: Cell and Tissue Research, Vol. 228, No. 1, 01.1983, p. 139-148.

Research output: Contribution to journalArticle

Vigh-Teichmann, I. ; Vígh, B. ; Manzano e Silva, M. J. ; Aros, B. / The pineal organ of Raja clavata : Opsin immunoreactivity and ultrastructure. In: Cell and Tissue Research. 1983 ; Vol. 228, No. 1. pp. 139-148.
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