scholarly journals Interkinetic Nuclear Migration Is Centrosome Independent and Ensures Apical Cell Division to Maintain Tissue Integrity

2015 ◽  
Vol 32 (2) ◽  
pp. 203-219 ◽  
Author(s):  
Paulina J. Strzyz ◽  
Hyun O. Lee ◽  
Jaydeep Sidhaye ◽  
Isabell P. Weber ◽  
Louis C. Leung ◽  
...  
Keyword(s):  
Cell Division ◽  
Apical Cell ◽  
Nuclear Migration ◽  
Tissue Integrity ◽  
Interkinetic Nuclear Migration

Patterns of cell division and interkinetic nuclear migration in the chick embryo hindbrain

1991 ◽  
Vol 22 (7) ◽  
pp. 742-754 ◽  
Author(s):  
Sarah Guthrie ◽  
Matthew Butcher ◽  
Andrew Lumsden
Keyword(s):  
Cell Division ◽  
Chick Embryo ◽  
Nuclear Migration ◽  
Interkinetic Nuclear Migration

Interkinetic nuclear migration in the tracheal and esophageal epithelia of the mouse embryo: Possible implications for tracheo-esophageal anomalies

2017 ◽  
Vol 58 (2) ◽  
pp. 62-70 ◽  
Author(s):  
Ryo Kaneda ◽  
Yuko Saeki ◽  
Dereje Getachew ◽  
Akihiro Matsumoto ◽  
Motohide Furuya ◽  
...  
Keyword(s):  
Mouse Embryo ◽  
Nuclear Migration ◽  
Interkinetic Nuclear Migration

scholarly journals Cephalopod Retinal Development Shows Vertebrate-like Mechanisms of Neurogenesis

2021 ◽  
Author(s):  
Francesca Napoli ◽  
Christina M Daly ◽  
Stephanie Neal ◽  
Kyle J McCulloch ◽  
Alexandra Zaloga ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Nervous System ◽  
Progenitor Cells ◽  
Cellular Proliferation ◽  
Imaging Techniques ◽  
Nuclear Migration ◽  
Live Imaging ◽  
Cellular Mechanisms ◽  
High Resolution Data ◽  
Interkinetic Nuclear Migration

Neurogenesis, the regulation of cellular proliferation and differentiation in the developing nervous system, is the process that underlies the diversity of size and cell type found in animal nervous systems. Our understanding of how this process has evolved is limited because of the lack of high resolution data and live-imaging methods across species. The retina is a classic model for the study of neurogenesis in vertebrates and live-imaging of the retina has shown that during development, progenitor cells are organized in a pseudostratified neuroepithelium and nuclei migrate in coordination with the cell cycle along the apicobasal axis of the cell, a process called interkinetic nuclear migration. Eventually cells delaminate and differentiate within the boundaries of the epithelium. This process has been considered unique to vertebrates and thought to be important in maintaining organization during the development of a complex nervous system. Coleoid cephalopods, including squid, cuttlefish and octopus, have the largest nervous system of any invertebrate and convergently-evolved camera-type eyes, making them a compelling comparative system to vertebrates. Here we have pioneered live-imaging techniques to show that the squid, Doryteuthis pealeii, displays cellular mechanisms during cephalopod retinal neurogenesis that are hallmarks of vertebrate processes. We find that retinal progenitor cells in the squid undergo interkinetic nuclear migration until they exit the cell cycle, we identify retinal organization corresponding to progenitor, post-mitotic and differentiated cells, and we find that Notch signaling regulates this process. With cephalopods and vertebrates having diverged 550 million years ago, these results suggest that mechanisms thought to be unique to vertebrates may be common to highly proliferative neurogenic primordia contributing to a large nervous system.

scholarly journals Gap Junctions/Hemichannels Modulate Interkinetic Nuclear Migration in the Forebrain Precursors

2010 ◽  
Vol 30 (12) ◽  
pp. 4197-4209 ◽  
Author(s):  
X. Liu ◽  
K. Hashimoto-Torii ◽  
M. Torii ◽  
C. Ding ◽  
P. Rakic
Keyword(s):  
Gap Junctions ◽  
Nuclear Migration ◽  
Interkinetic Nuclear Migration

Histopathology of Albugo tragopogonis on stems and petioles of sunflower

1999 ◽  
Vol 77 (1) ◽  
pp. 175-178
Author(s):  
H Krüger ◽  
A Viljoen ◽  
P S Van Wyk
Keyword(s):  
Cell Division ◽  
Key Words ◽  
Helianthus Annuus ◽  
Systemic Infection ◽  
Infected Tissue ◽  
Tissue Integrity ◽  
Callose Formation ◽  
Stem Lesions ◽  
Lignin Deposition

Stem lesions in sunflower caused by Albugo tragopogonis (Pers.) S.F. Gray developed individually from primary infections and did not result from a systemic infection. Cell division and callose formation were not observed, but weak lignin deposition occurred in infected tissues. Hyphae occurred intercellularly in stems in the cortex, cambium, vascular rays, and pith. In petioles parenchymatous tissue was heavily colonized in contrast to lightly colonized collenchymatous hypodermis. The middle lamellae of cells in infected tissue were dissolved, and cells degenerated and eventually collapsed. Stem infections lead to deterioration of tissue integrity, weakening of stems, and finally to lodging of stems (breaking over).Key words: Albugo tragopogonis, Helianthus annuus, histopathology, stem lodging.

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