This work was funded by R01-DE018234 and R01-DE019638.

1. Preparing the Donor Tissue
<ol>
<li>Prepare culture media, sharpen glass pins, sharpen tungsten needles.</li>
<li>Collect embryo from shell, wash in ice-cold PBS.
<ol class="lalpha">
<li>Using a 10 mL syringe and an 18 gauge needle remove 1.0 mL of albumin from the pointed end of the egg shell.</li>
<li>Make a small hole on the top of the shell using the point of scissors, and then cut a circular opening to expose the embryo</li>
</ol>
</li>
<li>Remove head and place into DMEM (serum free, room temperature)</li>
<l...

<ol>
	<li>Noden, D. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+Role+of+the+Neural+Crest+in+Patterning+of+Avian+Cranial+Skeletal,+Connective,+and+Muscle+Tissues.">The Role of the Neural Crest in Patterning of Avian Cranial Skeletal, Connective, and Muscle Tissues.</a> Developmental Biology. 96, 144-144 (1983).</li><li>Bronner-Fraser, M., Stern, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+Mesodermal+Tissues+on+Avian+Neural+Crest+Cell+Migration.">Effects of Mesodermal Tissues on Avian Neural Crest Cell Migration.</a> Developmental Biology. 143, 213-213 (1991).</li><li>Schneider, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neural+crest+can+form+cartilages+normally+derived+from+mesoderm+during+development+of+the+avian+head+skeleton.">Neural crest can form cartilages normally derived from mesoderm during development of the avian head skeleton.</a> Developmental Biology. 208, 441-441 (1999).</li><li>Couly, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Interactions+between+Hox-negative+cephalic+neural+crest+cells+and+the+foregut+endoderm+in+patterning+the+facial+skeleton+in+the+vertebrate+head.">Interactions between Hox-negative cephalic neural crest cells and the foregut endoderm in patterning the facial skeleton in the vertebrate head.</a> Development. 129, 1061-1061 (2002).</li><li>Evans, D. J., Noden, D. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spatial+relations+between+avian+craniofacial+neural+crest+and+paraxial+mesoderm+cells.">Spatial relations between avian craniofacial neural crest and paraxial mesoderm cells.</a> Dev Dyn. , (2006).</li><li>Hu, D., Marcucio, R., Helms, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+zone+of+frontonasal+ectoderm+regulates+patterning+and+growth+in+the+face.">A zone of frontonasal ectoderm regulates patterning and growth in the face.</a> Development. 130, 1749-1749 (2003).</li><li>Hu, D., Marcucio, R. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Unique+organization+of+the+frontonasal+ectodermal+zone+in+birds+and+mammals.">Unique organization of the frontonasal ectodermal zone in birds and mammals.</a> Dev Biol. 325, 200-200 (2009).</li><li>Le Li&#232;vre, C. S., Le Douarin, N. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mesenchymal+derivatives+of+the+neural+crest:+analysis+of+chimaeric+quail+and+chick+embryos.">Mesenchymal derivatives of the neural crest: analysis of chimaeric quail and chick embryos.</a> Journal of Embryology and Experimental Morphology. 34, 125-125 (1975).</li><li>Bollag, R. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Use+of+a+repetitive+mouse+B2+element+to+identify+transplanted+mouse+cells+in+mouse-chick+chimeras.">Use of a repetitive mouse B2 element to identify transplanted mouse cells in mouse-chick chimeras.</a> Exp Cell Res. 248, 75-75 (1999).</li><li>Korn, M. J., Cramer, K. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Windowing+chicken+eggs+for+developmental+studies.">Windowing chicken eggs for developmental studies.</a> J Vis Exp. , (2007).</li><li>Eames, B. F., Schneider, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Quail-duck+chimeras+reveal+spatiotemporal+plasticity+in+molecular+and+histogenic+programs+of+cranial+feather+development.">Quail-duck chimeras reveal spatiotemporal plasticity in molecular and histogenic programs of cranial feather development.</a> Development. 132, 1499-1499 (2005).</li><li>Odent, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Expression+of+the+Sonic+hedgehog+(SHH+)+gene+during+early+human+development+and+phenotypic+expression+of+new+mutations+causing+holoprosencephaly.">Expression of the Sonic hedgehog (SHH ) gene during early human development and phenotypic expression of new mutations causing holoprosencephaly.</a> Hum Mol Genet. 8, 1683-1683 (1999).</li><li>Szabo-Rogers, H. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Novel+skeletogenic+patterning+roles+for+the+olfactory+pit.">Novel skeletogenic patterning roles for the olfactory pit.</a> Development. 136, 219-219 (2009).</li></ol>

No conflicts of interest declared.

Using this transplantation method has allowed us to determine that the ectoderm contains signaling information that regulates dorsoventral polarity and proximodistal extension of the upper jaw. The similarity of outcomes when using quail or mouse ectoderm, and the conservation of molecular signals in this tissue among many species 6,11 indicates that this is a highly conserved signaling center among vertebrates. Furthermore, other investigators have used similar techniques to test the signaling properties of d...

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		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
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<tr>
<td>1x PBS</td>
<td>&nbsp;</td>
<td>TEK</td>
<td>TEKZR114</td>
<td>&nbsp;</td>
<tr>
<td>DMEM</td>
<td>&nbsp;</td>
<td>UCSF</td>
<td>CCFDA003</td>
<td>&nbsp;</td>
<tr>
<td>BSA</td>
<td>&nbsp;</td>
<td>SIGMA</td>
<td>A7906</td>
<td>&nbsp;</td>
<tr>
<td>Dispase</td>
<td>&nbsp;</td>
<td>GIBCO</td>
<td>17105-041</td>
<td>&nbsp;</td>
<tr>
<td>35x10 mm Petri dish</td>
<td>&nbsp;</td>
<td>Falcon</td>
<td>1008</td>
<td>&nbsp;</td>
<tr>
<td>No. 5 Dumont forceps</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>11252-20</td>
<td>&nbsp;</td>
<tr>
<td>Scissors</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>14058-11</td>
<td>&nbsp;</td>
<tr>
<td>Spring Scissors</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>15010-11</td>
<td>&nbsp;</td>
<tr>
<td>Needle holder</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>26016-12</td>
<td>&nbsp;</td>
<tr>
<td>Tungsten Needle</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>26000</td>
<td>&nbsp;</td>
<tr>
<td>Microcapillary tube </td>
<td>&nbsp;</td>
<td>Drummond Scientific Company</td>
<td>3-000-225-G</td>
<td>&nbsp;</td>
<tr>
<td>Pasteur Pipets</td>
<td>&nbsp;</td>
<td>Fisher</td>
<td>13-678-6B</td>
<td>&nbsp;</td>
<tr>
<td>Spring scissors</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>15010-11 </td>
<td>&nbsp;</td>
<tr>
<td>Blade holder</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>10052-11 </td>
<td>&nbsp;</td>
<tr>
<td>Razor blade</td>
<td>&nbsp;</td>
<td>Fine Science Tools</td>
<td>10050-00</td>
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assessing signaling properties of ectodermal epithelia during craniofacial development

The accessibility of avian embryos has helped experimental embryologists understand the fates of cells during development and the role of tissue interactions that regulate patterning and morphogenesis of vertebrates (e.g., 1, 2, 3, 4). Here, we illustrate a method that exploits this accessibility to test the signaling and patterning properties of ectodermal tissues during facial development. In these experiments, we create quail-chick 5 or mouse-chick 6 chimeras by transplanting the surface cephalic ectoderm that covers the upper jaw from quail or mouse onto either the same region or an ectopic region of chick embryos. The use of quail as donor tissue for transplantation into chicks was developed to take advantage of a nucleolar marker present in quail but not chick cells, thus allowing investigators to distinguish host and donor tissues 7. Similarly, a repetitive element is present in the mouse genome and is expressed ubiquitously, which allows us to distinguish host and donor tissues in mouse-chick chimeras 8. The use of mouse ectoderm as donor tissue will greatly extend our understanding of these tissue interactions, because this will allow us to test the signaling properties of ectoderm derived from various mutant embryos.

Watch this Scientific Journal Video about Assessing Signaling Properties of Ectodermal Epithelia During Craniofacial Development at JoVE.com

Assessing Signaling Properties of Ectodermal Epithelia During Craniofacial Development

This article describes a tissue transplantation technique that was designed to test the signaling and patterning properties of surface cephalic ectoderm during craniofacial development.

The accessibility of avian embryos has helped experimental embryologists understand the fates of cells during development and the role of tissue ...

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Biology

9.4K visualizações.  University of California San Francisco. Este artigo descreve uma técnica de transplante de tecido que foi projetado para testar a sinalização e padronização das propriedades ectoderma de superfície cefálica durante o desenvolvimento craniofacial.