XB-ART-15754
FEBS Lett
1997 Nov 10;4172:184-90.
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Early expression of a beta1-adrenergic receptor and catecholamines in Xenopus oocytes and embryos.
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From a Xenopus stage 11 cDNA library, we have cloned a gene, termed X-beta1AR, whose sequence is highly homologous to that of the human beta1-adrenergic receptor. As shown by RT-PCR assay, X-beta1AR RNA is present in the mature oocyte, decreases after fertilization up to stage 6 and then gradually increases during gastrulation. Binding studies performed with radiolabeled ligands reveal that X-beta1AR RNA is translated into the receptor protein. Furthermore, noradrenaline and adrenaline are also detected in oocytes and early embryos. The concomitant presence of beta1-adrenergic receptors and catecholamines suggest that this ligand-receptor couple could play a role in the very early stages of embryonic development.
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