Are accessory nuclei involved in the establishment of developmental gradients in hymenopteran oocytes?

1991 ◽  
Vol 199 (7) ◽  
pp. 423-426 ◽  
Author(s):  
Szczepan M. Biliński
Keyword(s):  
Accessory Nuclei

Accessory nuclei (nuclear membrane balloons) in the oocytes of the dipteran Phryne

Chromosoma ◽  
1979 ◽  
Vol 75 (1) ◽  
pp. 89-99 ◽  
Author(s):  
G. F. Meyer ◽  
S. Sokoloff ◽  
B. E. Wolf ◽  
B. Brand
Keyword(s):  
Nuclear Membrane ◽  
Accessory Nuclei

On the Connections of the Inferior Olivary Body

1891 ◽  
Vol 17 ◽  
pp. 23-27
Author(s):  
Alexander Bruce
Keyword(s):  
Medulla Oblongata ◽  
Short Distance ◽  
Grey Matter ◽  
Hypoglossal Nerve ◽  
Lower Margin ◽  
Accessory Nuclei ◽  
Formatio Reticularis ◽  
Pass Through ◽  
Inferior Olivary ◽  
Accessory Olive

The inferior olivary body or nucleus forms the ovoid projection which extends almost the whole length of the medulla oblongata, from the lower margin of the pons Varolii to within a short distance of the level of the decussation of the anterior pyramids. It is separated from the latter by a groove through which emerge the roots of the hypoglossal nerve. On its outer margin it is separated from the line of the roots of the glossopharyngeal and pneumogastric nerves by a shallow depression. Transverse vertical and longitudinal sections of the medulla show the olive to be a highly convoluted sac of grey matter open, at its hilum, towards the mesial plane. (It has two accessory nuclei of smaller size, an internal and a posterior accessory olive, which, as they are really parts of the larger nucleus, do not call for special consideration here.) The fibres of the hypoglossal nerve pass through its substance, but do not become, as was at one time supposed, and as has been recently again affirmed by Vincenzi, connected with the olive. On its median aspect lies the interolivary stratum or fillet. Anteriorly lies the anterior pyramid, posteriorly the formatio reticularis.

Assembly and breakdown of Cajal bodies in accessory nuclei of Hymenoptera

2005 ◽  
Vol 73 (2-3) ◽  
pp. 99-108 ◽  
Author(s):  
Mariusz K. Jaglarz ◽  
Szczepan M. Bilinski ◽  
M. Kloc
Keyword(s):  
Cajal Bodies ◽  
Accessory Nuclei

Hypothalamic accessory nuclei and their relation to the angiotensinergic and vasopressinergic systems

1999 ◽  
Vol 83 (2-3) ◽  
pp. 129-133 ◽  
Author(s):  
Claudia Riva ◽  
Peter Eggli ◽  
Dominik Felix ◽  
Robert Mosimann ◽  
Hans Imboden
Keyword(s):  
Accessory Nuclei

scholarly journals Accessory Nuclei and Annulate Lamellae in Hymenopteran Oocytes

Nature ◽  
1968 ◽  
Vol 218 (5140) ◽  
pp. 488-488 ◽  
Author(s):  
P. E. KING ◽  
J. G. RICHARDS
Keyword(s):  
Annulate Lamellae ◽  
Accessory Nuclei

scholarly journals Loss of the central rachis and synaptonemal complexes during meiotic prophase in female Ascaris lumbricoides var. suum after exposure to albendazole

2021 ◽  
Vol 95 ◽  
Author(s):  
P. Goldstein
Keyword(s):  
Ascaris Lumbricoides ◽  
Nuclear Matrix ◽  
Meiotic Prophase ◽  
Parasitic Nematode ◽  
Nuclear Architecture ◽  
Complete Loss ◽  
Synaptonemal Complexes ◽  
Meiotic Chromosomes ◽  
Accessory Nuclei ◽  
Benzimidazole Anthelmintic

Abstract Albendazole, a benzimidazole anthelmintic, interferes with the formation of microtubules and inhibits meiosis in the nematode Ascaris lumbricoides var. suum. Pigs treated with albendazole had worms in their uteri that had a severely deteriorated central rachis, complete loss of synaptonemal complexes and irregular oocytes at meiotic prophase I. The nuclear matrix and envelope were poorly formed and there was formation of accessory nuclei. This study represents the first examination of the changes in meiotic nuclear architecture and meiotic chromosomes after exposure to albendazole. These results provide the basis for the loss of fecundity in A. suum after exposure to albendazole resulting in control in the population of the parasitic nematode.

The Histochemistry and Fine Structure of the Accessory Nuclei in the Oocyte of Bombus terrestris

1964 ◽  
Vol s3-105 (72) ◽  
pp. 475-480
Author(s):  
C.R. HOPKINS
Keyword(s):  
Fine Structure ◽  
Bombus Terrestris ◽  
Vitelline Membrane ◽  
Oocyte Nucleus ◽  
Equal Division ◽  
Accessory Nuclei

The accessory nuclei are present throughout vitellogenesis in the peripheral ooplasm; they probably originate from the oocyte nucleus. Structurally they resemble nuclei and in addition their electron-dense inclusions contain RNA, possibly of nucleolar origin. They do not, however, contain chromosomal material. During development they increase in size and multiply by equal division or by a form of terminal budding. They do not become transformed into albuminous yolk spheres but are probably concerned with the control of albuminous yolk synthesis at the periphery of the oocyte. They remain after the termination of yolk synthesis and are associated with the formation of the vitelline membrane.

scholarly journals Expression of RESP18 in Peptidergic and Catecholaminergic Neurons

1997 ◽  
Vol 45 (9) ◽  
pp. 1265-1277 ◽  
Author(s):  
Daniel N. Darlington ◽  
Martin R. Schiller ◽  
Richard E. Mains ◽  
Betty A. Eipper
Keyword(s):  
Endoplasmic Reticulum ◽  
Specific Protein ◽  
Reticular Nucleus ◽  
Releasing Hormone ◽  
Catecholaminergic Neurons ◽  
Adult Rat ◽  
Adult Rat Brain ◽  
Accessory Nuclei ◽  
Y Cells ◽  
Post Transcriptional Regulation

We examined the expression of regulated endocrine-specific protein of 18-kD (RESP18) in selected peptidergic and catecholaminergic neurons of adult rat brain. In the hypothalamic paraventricular, supraoptic, and accessory nuclei, RESP18 mRNA was highly expressed in neurons immunostained for oxytocin and vasopressin. RESP18 mRNA was also highly expressed in paraventricular nucleus neurons immunostained for corticotropin-releasing hormone, thyrotropin-releasing hormone, and somatostatin. RESP18 mRNA was expressed in POMC cells of the arcuate nucleus, in neuropeptide Y cells of the dorsal teg-mental nucleus, lateral reticular nucleus, and hippocampus, and in brainstem catechola-minergic neurons. RESP18 mRNA expression was high in all paraventricular and arcuate neurons, but RESP18 protein was detectable in the perikarya of a subset of these neurons, suggesting an important post-transcriptional component to the regulation of RESP18 expression. RESP18 antisera immunostained perikarya but not axon fibers or terminals. Sub-cellular fractionation of homogenates of several hypothalamic nuclei identified RESP18 protein in fractions enriched in endoplasmic reticulum. The presence of 22- and 24-kD RESP18 isoforms in the neural lobe of the pituitary indicated that some RESP18 protein exited the endoplasmic reticulum. The post-transcriptional regulation of RESP18 expression and localization of RESP18 protein primarily to the endoplasmic reticulum suggests that RESP18 plays a regulatory role in peptidergic neurons.

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