A monoclonal antibody detects a difference in the cellular composition of developing and regenerating limbs of newts - PubMed (original) (raw)
Comparative Study
. 1987 Apr;99(4):589-602.
doi: 10.1242/dev.99.4.589.
Affiliations
- PMID: 3665773
- DOI: 10.1242/dev.99.4.589
Comparative Study
A monoclonal antibody detects a difference in the cellular composition of developing and regenerating limbs of newts
D M Fekete et al. Development. 1987 Apr.
Abstract
We have previously described a monoclonal antibody (called 22/18) that reacts with the early blastemal cells of the regenerating limb of the newt (Notophthalmus viridescens). In embryos of two newt species the antibody reacts with the epidermis, glial cells in the neural tube, the lens and cells in a restricted region of the aorta. In the developing limb bud less than 1% of the mesenchymal cells were reactive with 22/18, although most cells stained brightly with an antibody to another cytoskeletal component. When limbs were amputated prior to the arrival of nerves (axons and Schwann cells) at the amputation plane there was no extra reactivity with 22/18 as compared to the contralateral unamputated control, even though the amputated buds regenerated satisfactorily. Limbs amputated after nerves are present at the plane of amputation respond by forming a 22/18-positive blastema. The appearance of the 22/18 responses is a function of the stage of limb development as shown by amputation of forelimb and hindlimb buds at a larval stage where development of the forelimb is greatly advanced relative to the hindlimb. The distribution of the 22/18-positive cells in larval blastemas showed them to be closely associated with axons as detected by double staining with an antiserum to a neurofilament subunit. The clear antigenic difference between development and regeneration may be related to the relationship between embryonic regulation and epimorphic regeneration, and also to the acquisition of nerve-dependent proliferation of blastemal cells.
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