Exact(8)
We propose that a prepattern exists in the limb field for the three axes of the emerging limb bud as well as specific limb skeletal elements.
According to this model, the limb bud signaling centers, including the zone of polarizing activity (ZPA) acting through Shh, are required to elaborate upon the axial information provided by the native limb field prepattern.
The scapula, which develops from the somatopleure of the forelimb field (cranial part of the scapula that articulates with the humerus) and somitic dermomytome (scapula blade) [31], was more affected than the illium/ishium, a result consistent with Prx1-Cre being more active in the emerging forelimb bud and surrounding limb field than comparable regions of the developing hindlimb bud [10], [32].
Accordingly, treating the distal limb field with FGF inhibitor SU5402 (n = 12) down-regulated (n = 7/12) or even abolished (n = 4/12) hairy2 expression (Fig. 1Bvii,viii).
We also found that there was not a large bias in the rate of elongation along the P-D axis, meaning that the limb field uniformly expands during its development along this axis.
Our study is the most detailed molecular analysis of limb regeneration to date and is the first to identify genes specific to the limb regeneration process by comparing the general wound healing response outside a limb field.
Similar(52)
Therefore, and despite the merging of the lower limbs giving the name to the sirenomelia condition, it might be secondary, and occur as a consequence of the approximation of the limb fields.
According to the vascular steal hypothesis, fusion of the limbs results from a deficient blood flow and nutrient supply to the caudal mesoderm, which in turn would result in agenesis of midline structures and subsequent abnormal approximation of both lower limb fields.
For what do we risk life and limb on this field?" There is a pause as the men on the field consider this.
Some have lost limbs on the field of battle, and others still battle the demons that have followed them home.
With both teams playing their third game in eight days after the Easter schedule last weekend, there were lethargic legs and limbs on the field.
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Justyna Jupowicz-Kozak
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