scholarly journals An in vitro model for characterizing the post-migratory cranial neural crest cells of the first branchial arch

2006 ◽  
Vol 235 (5) ◽  
pp. 1433-1440 ◽  
Author(s):  
Hu Zhao ◽  
Pablo Bringas ◽  
Yang Chai
Keyword(s):  
Neural Crest ◽  
In Vitro Model ◽  
Neural Crest Cells ◽  
Branchial Arch ◽  
Cranial Neural Crest ◽  
Vitro Model ◽  
Cranial Neural Crest Cells

scholarly journals Chick cranial neural crest cells migrate by progressively refining the polarity of their protrusions

2017 ◽  
Author(s):  
Miriam A. Genuth ◽  
Christopher D.C. Allen ◽  
Takashi Mikawa ◽  
Orion D. Weiner
Keyword(s):  
Neural Crest ◽  
Quantitative Imaging ◽  
Cell Movement ◽  
Neural Crest Cells ◽  
Branchial Arch ◽  
Cranial Neural Crest ◽  
Directed Movement ◽  
Morphological Polarity ◽  
Cranial Neural Crest Cells

SummaryIn vivo quantitative imaging reveals that chick cranial neural crest cells throughout the migratory stream are morphologically polarized and migrate by progressively refining the polarity of their protrusions.AbstractTo move directionally, cells can bias the generation of protrusions or select among randomly generated protrusions. Here we use 3D two-photon imaging of chick branchial arch 2 directed neural crest cells to probe how these mechanisms contribute to directed movement, whether a subset or the majority of cells polarize during movement, and how the different classes of protrusions relate to one another. We find that cells throughout the stream are morphologically polarized along the direction of overall stream movement and that there is a progressive sharpening of the morphological polarity program. Neural crest cells have weak spatial biases in filopodia generation and lifetime. Local bursts of filopodial generation precede the generation of larger protrusions. These larger protrusions are more spatially biased than the filopodia, and the subset of protrusions that power motility are the most polarized of all. Orientation rather than position is the best correlate of the protrusions that are selected for cell movement. This progressive polarity refinement strategy may enable neural crest cells to efficiently explore their environment and migrate accurately in the face of noisy guidance cues.

scholarly journals MAPRE2 mutations result in altered human cranial neural crest migration, underlying craniofacial malformations in CSC-KT syndrome

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cedric Thues ◽  
Jorge S. Valadas ◽  
Liesbeth Deaulmerie ◽  
Ann Geens ◽  
Amit K. Chouhan ◽  
...  
Keyword(s):  
Neural Crest ◽  
Induced Pluripotent Stem Cell ◽  
Neural Crest Cells ◽  
Branchial Arch ◽  
Cellular Migration ◽  
Cranial Neural Crest ◽  
Craniofacial Malformations ◽  
Neural Crest Migration

AbstractCircumferential skin creases (CSC-KT) is a rare polymalformative syndrome characterised by intellectual disability associated with skin creases on the limbs, and very characteristic craniofacial malformations. Previously, heterozygous and homozygous mutations in MAPRE2 were found to be causal for this disease. MAPRE2 encodes for a member of evolutionary conserved microtubule plus end tracking proteins, the end binding (EB) family. Unlike MAPRE1 and MAPRE3, MAPRE2 is not required for the persistent growth and stabilization of microtubules, but plays a role in other cellular processes such as mitotic progression and regulation of cell adhesion. The mutations identified in MAPRE2 all reside within the calponin homology domain, responsible to track and interact with the plus-end tip of growing microtubules, and previous data showed that altered dosage of MAPRE2 resulted in abnormal branchial arch patterning in zebrafish. In this study, we developed patient derived induced pluripotent stem cell lines for MAPRE2, together with isogenic controls, using CRISPR/Cas9 technology, and differentiated them towards neural crest cells with cranial identity. We show that changes in MAPRE2 lead to alterations in neural crest migration in vitro but also in vivo, following xenotransplantation of neural crest progenitors into developing chicken embryos. In addition, we provide evidence that changes in focal adhesion might underlie the altered cell motility of the MAPRE2 mutant cranial neural crest cells. Our data provide evidence that MAPRE2 is involved in cellular migration of cranial neural crest and offers critical insights into the mechanism underlying the craniofacial dysmorphisms and cleft palate present in CSC-KT patients. This adds the CSC-KT disorder to the growing list of neurocristopathies.

scholarly journals FGF2 promotes skeletogenic differentiation of cranial neural crest cells

Development ◽  
2001 ◽  
Vol 128 (11) ◽  
pp. 2143-2152 ◽  
Author(s):  
Sanjukta Sarkar ◽  
Anita Petiot ◽  
Andrew Copp ◽  
Patrizia Ferretti ◽  
Peter Thorogood
Keyword(s):  
Neural Crest ◽  
Neural Crest Cells ◽  
Dependent Manner ◽  
Cranial Neural Crest ◽  
Fibroblast Growth Factor Receptors ◽  
Tissue Interactions ◽  
Membrane Bone ◽  
Cartilage Differentiation ◽  
Cranial Neural Crest Cells

The cranial neural crest gives rise to most of the skeletal tissues of the skull. Matrix-mediated tissue interactions have been implicated in the skeletogenic differentiation of crest cells, but little is known of the role that growth factors might play in this process. The discovery that mutations in fibroblast growth factor receptors (FGFRs) cause the major craniosynostosis syndromes implicates FGF-mediated signalling in the skeletogenic differentiation of the cranial neural crest. We now show that, in vitro, mesencephalic neural crest cells respond to exogenous FGF2 in a dose-dependent manner, with 0.1 and 1 ng/ml causing enhanced proliferation, and 10 ng/ml inducing cartilage differentiation. In longer-term cultures, both endochondral and membrane bone are formed. FGFR1, FGFR2 and FGFR3 are all detectable by immunohistochemistry in the mesencephalic region, with particularly intense expression at the apices of the neural folds from which the neural crest arises. FGFRs are also expressed by subpopulations of neural crest cells in culture. Collectively, these findings suggest that FGFs are involved in the skeletogenic differentiation of the cranial neural crest.

scholarly journals Modulation of β-catenin levels is critical for cranial neural crest patterning and dispersal into first pharyngeal arch

2019 ◽  
Author(s):  
Alok Javali ◽  
Vairavan Laxmanan ◽  
Dasaradhi Palakodeti ◽  
Ramkumar Sambasivan
Keyword(s):  
Neural Crest ◽  
Neural Crest Cells ◽  
Mouse Embryos ◽  
Pharyngeal Arch ◽  
Cranial Neural Crest ◽  
Connective Tissues ◽  
Pharyngeal Arches ◽  
Cell Arrangement ◽  
Cranial Neural Crest Cells

AbstractVertebrate cranial neural crest cells (CNCC) are multipotent. Proximal to the source CNCC form the cranial ganglia. Distally, in the pharyngeal arches, they give rise to the craniofacial skeleton and connective tissues. Fate choices are made as CNCC pattern into distinct destination compartments. In spite of this importance, the mechanism patterning CNCC is poorly defined. Here, we report that a novel β-catenin-controlled switch in the cell arrangement is critical in patterning CNCC. In mouse embryos, at the first pharyngeal arch axial level, membrane β-catenin levels correlate with the extent of cell-cell adhesion and thus, with a collective or a dispersed state of CNCC. Using in vitro human neural crest model and chemical modulators of β-catenin levels, we show a requirement for down-modulating β-catenin for the collective-to-dispersed switch. Similarly, in β-catenin gain of function mutant mouse embryos, CNCC fail to disperse, which may underlie their failure to populate first pharyngeal arch. Thus, we show that β-catenin-mediated regulation of CNCC tissue architecture, a previously underappreciated mechanism, underlies the patterning of CNCC into fate-specific compartments.Summary statementThe report shows a crucial step in cranial neural crest patterning. Neural crest cells invading the pharyngeal arches transition from a collective to a dispersed state. This transition in cell arrangement is dependent on membrane β-catenin levels.

Regulation of Hoxa2 in cranial neural crest cells involves members of the AP-2 family

Development ◽  
1999 ◽  
Vol 126 (7) ◽  
pp. 1483-1494 ◽  
Author(s):  
M. Maconochie ◽  
R. Krishnamurthy ◽  
S. Nonchev ◽  
P. Meier ◽  
M. Manzanares ◽  
...  
Keyword(s):  
Neural Crest ◽  
Specific Activity ◽  
Family Members ◽  
Neural Crest Cells ◽  
Branchial Arch ◽  
Cranial Neural Crest ◽  
Reporter Expression ◽  
Specific Expression ◽  
Conserved Sequence ◽  
Cranial Neural Crest Cells

Hoxa2 is expressed in cranial neural crest cells that migrate into the second branchial arch and is essential for proper patterning of neural-crest-derived structures in this region. We have used transgenic analysis to begin to address the regulatory mechanisms which underlie neural-crest-specific expression of Hoxa2. By performing a deletion analysis on an enhancer from the Hoxa2 gene that is capable of mediating expression in neural crest cells in a manner similar to the endogenous gene, we demonstrated that multiple cis-acting elements are required for neural-crest-specific activity. One of these elements consists of a sequence that binds to the three transcription factor AP-2 family members. Mutation or deletion of this site in the Hoxa2 enhancer abrogates reporter expression in cranial neural crest cells but not in the hindbrain. In both cell culture co-transfection assays and transgenic embryos AP-2 family members are able to trans-activate reporter expression, showing that this enhancer functions as an AP-2-responsive element in vivo. Reporter expression is not abolished in an AP-2(alpha) null mutant embryos, suggesting redundancy with other AP-2 family members for activation of the Hoxa2 enhancer. Other cis-elements identified in this study critical for neural-crest-specific expression include an element that influences levels of expression and a conserved sequence, which when multimerized directs expression in a broad subset of neural crest cells. These elements work together to co-ordinate and restrict neural crest expression to the second branchial arch and more posterior regions. Our findings have identified the cis-components that allow Hoxa2 to be regulated independently in rhombomeres and cranial neural crest cells.

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