Cloning of crustacean ecdysteroid receptor and retinoid-X receptor gene homologs and elevation of retinoid-X receptor mRNA by retinoic acid

被引:125
|
作者
Chung, ACK
Durica, DS [1 ]
Clifton, SW
Roe, BA
Hopkins, PM
机构
[1] Univ Oklahoma, Dept Zool, Norman, OK 73019 USA
[2] Univ Oklahoma, Dept Chem & Biochem, Norman, OK 73019 USA
基金
美国国家科学基金会;
关键词
EcR; RXR; retinoic acid; regeneration; cDNA clones; crustacea;
D O I
10.1016/S0303-7207(98)00056-2
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
We report the cloning and analysis of ecdysteroid receptor (UpEcR) and retinoid-X receptor (UpRXR) cDNA homologs from the fiddler crab Uca pugilator. The deduced amino acid sequence of this crustacean EcR most closely resembles the insect EcRs within the DNA binding and ligand binding: domains (LBDs). For UpRXR, the DNA binding domain (DBD) shares greatest identity to the insect USPs. The ligand binding domain, however, is closer to vertebrate RXRs but may have a nonfunctional AF-2 domain. Probes derived from these clones were used to examine transcript levels in blastemas during early limb regeneration. Both UpEcR and UpRXR transcripts were detected in low amounts 1 day after limb loss, but increased during the next 4 days. Immersion of crabs in sea water containing all-trans retinoic acid increased the steady state concentrations of UpRXR transcript and altered the pattern of circulating ecdpsteroids. These effects correlate with the disruptive effects of retinoic acid on blastemal differentiation observed in earlier studies. (C) 1998 Published by Elsevier Science Ireland Ltd. All rights reserved.
引用
收藏
页码:209 / 227
页数:19
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