scholarly journals Multiple roles of Sox2, an HMG-box transcription factor in avian neural crest development

2003 ◽  
Vol 229 (1) ◽  
pp. 74-86 ◽  
Author(s):  
Yoshio Wakamatsu ◽  
Yukinori Endo ◽  
Noriko Osumi ◽  
James A. Weston
2002 ◽  
Vol 159 (5) ◽  
pp. 867-880 ◽  
Author(s):  
Lisette Hari ◽  
Véronique Brault ◽  
Maurice Kléber ◽  
Hye-Youn Lee ◽  
Fabian Ille ◽  
...  

β-Catenin plays a pivotal role in cadherin-mediated cell adhesion. Moreover, it is a downstream signaling component of Wnt that controls multiple developmental processes such as cell proliferation, apoptosis, and fate decisions. To study the role of β-catenin in neural crest development, we used the Cre/loxP system to ablate β-catenin specifically in neural crest stem cells. Although several neural crest–derived structures develop normally, mutant animals lack melanocytes and dorsal root ganglia (DRG). In vivo and in vitro analyses revealed that mutant neural crest cells emigrate but fail to generate an early wave of sensory neurogenesis that is normally marked by the transcription factor neurogenin (ngn) 2. This indicates a role of β-catenin in premigratory or early migratory neural crest and points to heterogeneity of neural crest cells at the earliest stages of crest development. In addition, migratory neural crest cells lateral to the neural tube do not aggregate to form DRG and are unable to produce a later wave of sensory neurogenesis usually marked by the transcription factor ngn1. We propose that the requirement of β-catenin for the specification of melanocytes and sensory neuronal lineages reflects roles of β-catenin both in Wnt signaling and in mediating cell–cell interactions.


2014 ◽  
Vol 132 ◽  
pp. 38-43 ◽  
Author(s):  
Paola Betancur ◽  
Marcos Simões-Costa ◽  
Tatjana Sauka-Spengler ◽  
Marianne E. Bronner

2003 ◽  
Vol 229 (1) ◽  
pp. 87-98 ◽  
Author(s):  
Robert D. Knight ◽  
Yashar Javidan ◽  
Sarah Nelson ◽  
Tailin Zhang ◽  
Thomas Schilling

1997 ◽  
Vol 16 (2) ◽  
pp. 154-160 ◽  
Author(s):  
Deepak Srivastava ◽  
Tiffani Thomas ◽  
Qing Lin ◽  
Margaret L. Kirby ◽  
Doris Brown ◽  
...  

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