Fibroblast growth factor receptors regulate the ability for hindlimb regeneration in Xenopus laevis Export

@article{citeulike:2758415, abstract = {During outgrowth of the developing limb, signals from the apical ectodermal ridge, such as fibroblast growth factors, are paramount for limb patterning. Similarly, fibroblast growth factor molecules and their receptors are synthesized in the wound epithelium of the regenerating limb blastema, implicating an analogous function to limb development. To address this issue further and to understand the role of fibroblast growth factor receptor signaling in limb regeneration, we have examined the expression patterns of x-fibroblast growth factor receptors-1, -2, -3, -4a, and -4b in Xenopus laevis. This amphibian model provides a system in which both regenerating (premetamorphic; tadpole or larva stage) and nonregenerating (postmetamorphic; froglet stage) hindlimbs can be studied. In premetamorphic hindlimbs (stage 53), all of the receptors were expressed in the wound epithelium and the underlying mesenchyme. In postmetamorphic limbs (stage 61), however, transcripts for x-fibroblast growth factor receptors-1 and -2 were absent from the wound epithelium. The expression results for x-fibroblast growth factor receptors-1 and -2 were corroborated at the protein level by employing specific antibodies. Thus, it appears that expression of both fibroblast growth factor receptors-1 and -2 is associated with the ability for limb regeneration. The role of these receptors in regeneration was further investigated by using specific inhibitors to fibroblast growth factor receptors during premetamorphic hindlimb regeneration. These compounds inhibited the normal limb outgrowth and resulted, in the majority of the cases, in outgrowths of cones or spikes reminiscent of growth that is seen in amputated postmetamorphic limbs. Thus, fibroblast growth factor receptors-1 and -2 expression and function should be regarded as paramount for the ability of limb regeneration in Xenopus.}, author = {D'Jamoos, Christopher A. and Mcmahon, Gerald and Tsonis, Panagiotis A.}, citeulike-article-id = {2758415}, citeulike-linkout-0 = {http://www.blackwell-synergy.com/doi/abs/10.1046/j.1460-9568.1998.60415.x}, citeulike-linkout-1 = {http://dx.doi.org/10.1046/j.1460-9568.1998.60415.x}, citeulike-linkout-2 = {http://www3.interscience.wiley.com/cgi-bin/abstract/119133002/ABSTRACT}, doi = {10.1046/j.1460-9568.1998.60415.x}, journal = {Wound Repair and Regeneration}, keywords = {fgf, fgfr-antibody, frog, h}, number = {4}, pages = {S--388-S-397}, posted-at = {2008-05-05 18:05:34}, priority = {2}, title = {Fibroblast growth factor receptors regulate the ability for hindlimb regeneration in Xenopus laevis}, url = {http://dx.doi.org/10.1046/j.1460-9568.1998.60415.x}, volume = {6}, year = {1998} }

TY - JOUR ID - citeulike:2758415 L3 - citeulike-article-id:2758415 N2 - During outgrowth of the developing limb, signals from the apical ectodermal ridge, such as fibroblast growth factors, are paramount for limb patterning. Similarly, fibroblast growth factor molecules and their receptors are synthesized in the wound epithelium of the regenerating limb blastema, implicating an analogous function to limb development. To address this issue further and to understand the role of fibroblast growth factor receptor signaling in limb regeneration, we have examined the expression patterns of x-fibroblast growth factor receptors-1, -2, -3, -4a, and -4b in Xenopus laevis. This amphibian model provides a system in which both regenerating (premetamorphic; tadpole or larva stage) and nonregenerating (postmetamorphic; froglet stage) hindlimbs can be studied. In premetamorphic hindlimbs (stage 53), all of the receptors were expressed in the wound epithelium and the underlying mesenchyme. In postmetamorphic limbs (stage 61), however, transcripts for x-fibroblast growth factor receptors-1 and -2 were absent from the wound epithelium. The expression results for x-fibroblast growth factor receptors-1 and -2 were corroborated at the protein level by employing specific antibodies. Thus, it appears that expression of both fibroblast growth factor receptors-1 and -2 is associated with the ability for limb regeneration. The role of these receptors in regeneration was further investigated by using specific inhibitors to fibroblast growth factor receptors during premetamorphic hindlimb regeneration. These compounds inhibited the normal limb outgrowth and resulted, in the majority of the cases, in outgrowths of cones or spikes reminiscent of growth that is seen in amputated postmetamorphic limbs. Thus, fibroblast growth factor receptors-1 and -2 expression and function should be regarded as paramount for the ability of limb regeneration in Xenopus. IS - 4 JF - Wound Repair and Regeneration EP - 388-S-397 TI - Fibroblast growth factor receptors regulate the ability for hindlimb regeneration in Xenopus laevis VL - 6 SP - S KW - fgf KW - fgfr-antibody KW - frog KW - h AU - D'Jamoos, Christopher AU - Mcmahon, Gerald AU - Tsonis, Panagiotis PY - 1998/// UR - http://dx.doi.org/10.1046/j.1460-9568.1998.60415.x ER -