Synaptic Ribbon Populations in the Pineal Gland of the Rhesus Monkey (Macaca Mulatta)

Overview

Journal Cell Tissue Res

Specialties Anatomy & Histology
Cell Biology

Date 1986 Jan 1

PMID 3948238

Citations 3

Authors

J A McNulty

L Fox

D Taylor

M Miller

Y Takaoka

Affiliations

Soon will be listed here.

Abstract

Pinealocytes of rhesus monkeys that had been ovariectomized and given intramuscular injections of 250 micrograms estradiol-benzoate for 3 consecutive days tended to have more synaptic ribbons (SR) and exhibited a significantly greater size of ribbon fields (RF) compared to untreated animals. These data are consistent with hypotheses that pinealocyte function in primates is altered by hormonal imbalances and that the SR participates in this response. RF were positioned in various parts of the cytoplasm and along the plasma membrane. Participation of SR in direct cell-to-cell contacts was suggested by the formation of densities along the plasma membrane. It is postulated that large RF serve as storage organelles and that the formation of RF results from division of pre-existing SR in each field. Reconstructions made from serial thin sections revealed that profiles of RF comprised separate SR that were not folded and sectioned along various planes.

Citing Articles

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

Vollrath L, Helms U, Cardinali D J Neural Transm Gen Sect. 1990; 82(2):141-6.

PMID: 2222991 DOI: 10.1007/BF01245170.

Effects of LHRH, progesterone, estradiol-17 beta and dexamethasone in vitro on pineal synaptic ribbons and serotonin N-acetyltransferase activity in diestrous rats.

Saidapur S, Seidel A, Vollrath L J Neural Transm Gen Sect. 1991; 84(1-2):65-73.

PMID: 2054151 DOI: 10.1007/BF01249110.

Effect of steroid hormones on serotonin, norepinephrine and epinephrine contents in the pineal-paraphyseal complex of the soft-shelled turtle (Lissemys punctata punctata).

Mahata M, Mahata S J Comp Physiol B. 1992; 162(6):520-5.

PMID: 1430421 DOI: 10.1007/BF00264812.

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