Ectodermal Dysplasia - Hairless This type
of Ectodermal Dysplasia is responsible for hairlessness as well as dental abnormalities in the Chinese Crested, Mexican Hairless, and Peruvian Hairless breeds.
Ectodermal dysplasia is a term that covers a wide group of diseases associated with abnormal development of any tissue
of ectodermal origin, namely skin, nails and teeth.
Hairless dog breeds show a form
of ectodermal dysplasia characterised by a lack of hair and abnormal tooth morphology.
In the model shown in Figure 9, we suggest that a similar uncommitted and self - renewing state may exist in the direction
of ectodermal differentiation and we imagine the ground state could consist of at least three distinct populations in equilibrium.
The process of skeleton growth in corals has been suggested to be controlled by a specialized tissue called calicoblastic epithelium, which is comprised
of ectodermal cells within the aboral coral layer, opposite the oral side (Gattuso, Allemand & Frankignoulle, 1999).
Not exact matches
Both groups report that a strand
of rapidly dividing cells on the tip
of the growing vertebrate limb, called the apical
ectodermal ridge (AER), arises exactly on the border between cells that switch on R - fng and those that don't.
The results suggested that each
of the Wnt genes (Wnt - 2b, Wnt - 8c, Wnt - 3a) were responsible for turning on two forms
of FGF, each
of which controls both limb initiation and a bud or bulge known as the apical
ectodermal ridge (AER), which acts as the «organizer»
of limb development.
We differentiated our iPS cells as embryoid bodies (EB)(Figure 4A) in the presence
of FBS to induce endodermal and mesodermal fates, and in the presence
of retinoic acid to induce an
ectodermal fate, and after ten days allowed them to adhere to tissue culture dishes.
The condition, X-linked hypohidrotic
ectodermal dysplasia (XLHED), occurs due to a genetic - driven deficiency
of a key developmental protein called ectodysplasin A (EDA), the study authors said in background notes.
Ectodermal defects: any
of a multitude
of abnormalities arising from maldevelopment
of the fetal ectoderm (e.g., skin, nervous system, eyes).