Conservation of Position-Specific Gene Expression in Axolotl Limb Skin
Conservation of Position-Specific Gene Expression in Axolotl Limb Skin
复制标题
蝾螈四肢皮肤位置特异性基因表达的保护
作者:
A. Satoh;Aki Makanae
Urodele amphibians can regenerate their limbs after amputation. After amputation, undifferentiated cells appear on the amputation plane and form regeneration blastema. A limb blastema recreates a complete replica of the original limb. It is well known that disturbance of the location of limb tissues prior to amputation perturbs limb patterning, suggesting that different intact limb tissues carry different location information despite their identical appearance. The cause of such differences in intact tissues remains unknown. In this study, we found that Lmx1b, Tbx2, and Tbx3 genes, which are expressed in developing limb in a region specific manner, remained detectable in a mature axolotl limb. Furthermore, those position-specific gene expression patterns were conserved in mature limbs. Treatment with retinoic acid (RA), which is known to have ventralizing activity, changed Lmx1b expression in intact dorsal skin and dorsal character to ventral, indicating that conserved Lmx1b expression was due to the dorsal character and not leaky gene expression. Furthermore, we found that such conserved gene expression was rewritable in regeneration blastemas. These results suggest that axolotl limb cells can recognize their locations and maintain limbness via conserved expression profiles of developmental genes.
登录
查看更多内容
影响因子:
2.7
作者:
Endo, T;Bryant, SV;Gardiner, DM
通讯作者:
Gardiner, DM
影响因子:
64.8
作者:
Kragl, Martin;Knapp, Dunja;Tanaka, Elly M.
通讯作者:
Tanaka, Elly M.
DOI:
--
发表时间:
1999
期刊:
The Journal of experimental zoology.
影响因子:
--
作者:
Torok,MA;Gardiner,DM;Izpisua-Belmonte,JC;Bryant,SV
通讯作者:
Bryant,SV
DOI:
10.1242/dev.121.6.1731
发表时间:
1995
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Gardiner,DM;Blumberg,B;Komine,Y;Bryant,SV
通讯作者:
Bryant,SV
DOI:
10.1002/ar.b.20082
发表时间:
2005-11-01
期刊:
Anatomical Record Part B:The New Anatomist
影响因子:
--
作者:
Han, Manjong;Yang, Xiaodong;Muneoka, Ken
通讯作者:
Muneoka, Ken