Overexpression of wild-type p53 interferes with normal development in Xenopus laevis embryos.

Abstract:

:We have cloned and sequenced a Xenopus p53 homologue which differs by one amino acid deletion from a previously published Xenopus sequence (Soussi et al., 1987). Transcription analysis revealed that this gene is activated during early oogenesis and that zygotic transcription initiates after midblastula transition. Transcripts are also present in all tested tissues of adult animals. Whole mount in situ hybridization with Xenopus oocytes and embryos revealed, that transcripts are ubiquitously distributed although some accumulation is observed in certain tissues. Microinjection of p53 mRNA into early cleavage stages effectively resulted in overexpression of p53 protein and interfered with normal development. Lethal defects until and during gastrulation and aberrant phenotypes of surviving embryos were probably caused by cleavage arrest or cleavage delay of injected cells with subsequent distortions of cell movements, induction processes and tissue differentiations.

journal_name

Oncogene

journal_title

Oncogene

authors

Hoever M,Clement JH,Wedlich D,Montenarh M,Knöchel W

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

109-20

issue

1

eissn

0950-9232

issn

1476-5594

journal_volume

9

pub_type

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