Synaptic ribbon populations in the pineal gland of the rhesus monkey (Macaca mulatta)

McNulty, John A.; Fox, Linda M.; Taylor, Dwan A.; Miller, M.M.; Takaoka, Yoshiro

doi:10.1007/bf00251051

Cited by 18 publications

(18 citation statements)

References 24 publications

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“…13. 15-17.25.26] and Primates [27][28][29]. in which appar ently the greatest numbers per unit area were found.…”

Section: Discussionmentioning

confidence: 99%

‘Synaptic’ Bodies in the Pineal Glands of the Cow, Sheep and Pig

Struwe¹,

Vollrath²

1990

Cells Tissues Organs

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The present results show that ‘synaptic’ bodies (SB) are a heterogeneous group of organelles in the pineal glands of Artiodactyla. Basically, rod-like (ribbons) and sphere-like (spherules) SB can be distinguished. In the pig small numbers of both ‘synaptic’ ribbons (SR) and ‘synaptic’ spherules (SS) are found. In bovine and ovine pineal glands few SS but no SR were seen. The same results were obtained from animals of the same species but from different continents. This suggests that the numbers of SB are species specific rather than influenced by the different lighting conditions in Europe and in equatorial Africa.

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“…13. 15-17.25.26] and Primates [27][28][29]. in which appar ently the greatest numbers per unit area were found.…”

Section: Discussionmentioning

confidence: 99%

‘Synaptic’ Bodies in the Pineal Glands of the Cow, Sheep and Pig

Struwe¹,

Vollrath²

1990

Cells Tissues Organs

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“…In the rhesus monkey (Macaca mulatta) SRP numbers were significantly increased after ovariectomy and estradiol benzoate treatment compared to untreated controls (McNulty et al, 1986). A similar observation was made 2 and 3 weeks after orchidectomy in rats (Karasek, 1976).…”

Section: Discussionmentioning

confidence: 55%

Quantitative analysis of ?synaptic? ribbon profiles in the pineal complex of male and female Pirbright-White guinea pigs

Vollrath

Helms

Cardinali

1990

J. Neural Transmission

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Previous studies have pointed in the direction of sex differences as well as regional differences in the pineal gland of guinea pigs. In the present investigation these aspects were studied at the electron-microscopic level by quantitating different types of "synaptic" bodies, intrinsic to pinealocytes. The two major types of "synaptic" organelles, ribbons and spherules, did not exhibit regional or sex differences. "Synaptic" structures intermediate in appearance to ribbons and spherules were significantly larger in number in males in the distal region of the pineal gland, compared to females. As previous studies have shown that ribbon and spherule numbers undergo characteristic changes depending on the functional state of the pineal gland, it is concluded that, as far as the "synaptic" organelles are concerned, no clear-cut sex or regional differences appear to exist in the guinea pig pineal gland.

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“…Synaptic ribbons in the pinealocyte cytoplasm, so often reported in other animals, e.g., rliesus monkey (McNulty et al, 1986), have not been observed in the vampire. At present it cannot be argued effectively whether these organelles are altogether absent in Desmodus or whether their lack represents a physiological state in which they remain unexpressed.…”

Section: Innervationmentioning

confidence: 92%

Ultrastructure of the pineal body of the common vampire bat, Desmodus rotundus

Bhatnagar

1988

Am. J. Anat.

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The type AB pineal body of the common vampire bat, Desmodus rotundus, was recessed and lobulated, was extensively vascularized and intimately related to great veins, and was unassociated with the epithalamic region. The habenular and the posterior commissures coursed anteriorly and were unassociated with the pineal. The saccular suprapineal recess of the third ventricle extended dorsally juxtaposed to the pineal body. These anatomical features are likely to make pinealectomies in the vampire more difficult to manage. The pineal parenchyma consisted of light pinealocytes surrounded by canaliculi of various sizes, often transmitting unmyelinated nerve fibers and glial processes. Desmosomes were common. The pinealocyte nuclei were large and highly infolded; characteristic cytoplasmic constituents included abundant dilated Golgi complexes associated with clear vesicles, numerous polyribosomes, few single cisternae of ribosome-studded rough endoplasmic reticulum, mitochondria, and occasional multivesicular bodies and lysosomes. Almost all pinealocytes exhibited centrioles and some, in addition, displayed basal bodies but rarely ciliary shafts. A conspicuous feature of the pinealocyte cytoplasm was the presence of branched bundles of intermediate filaments, especially in the perinuclear zone. Siderotic macrophages, lipofuscin-pigment-containing phagocytic cells, mast cells, myelin bodies, and both fenestrated and continuous capillaries were present. The perivascular compartment was densely packed with unmyelinated nerve bundles containing small to large fibers exhibiting axoaxonic densities. Other constituents of the perivascular compartment were club-shaped pinealocyte processes filled with clear vesicles, microtubules, an occasional mitochondrion, glial processes, and collagen fibers. "Synapselike" contacts were observed between the axons and pinealocyte processes. Abundant pinocytotic vesicles in the capillary endothelium indicated active pinocytosis. Myelinated nerve fibers were lacking. The pineal ultrastructure of Desmodus is in part unlike that reported for other mammals, including bats.

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Synaptic ribbon populations in the pineal gland of the rhesus monkey (Macaca mulatta)

Cited by 18 publications

References 24 publications

‘Synaptic’ Bodies in the Pineal Glands of the Cow, Sheep and Pig

‘Synaptic’ Bodies in the Pineal Glands of the Cow, Sheep and Pig

Quantitative analysis of ?synaptic? ribbon profiles in the pineal complex of male and female Pirbright-White guinea pigs

Ultrastructure of the pineal body of the common vampire bat, Desmodus rotundus

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