Abstract
The ability of day E10 mouse fore-limb bud to regulate following the removal of a portion of limb tissue was investigated. A longitudinal strip of tissue, two to three somites in width and extending from the base of the limb bud to its distal tip, was excised. The embryos were then maintained in a roller culture system for periods of 6 h, 12 h or 24 h post-operatively prior to fixation and subsequent examination. The embryos were examined with scanning electron microscopy (SEM) and light microscopy. SEM revealed that about two thirds of the operated limbs grossly restored their overall morphology. The sequence of morphological changes involved in the restoration process is described. The ability of the restored limb bud to develop an apical ectodermal ridge (AER) is shown in histological sections.
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