Concurrent and distinct transcription and translation of transforming growth factor-beta type I and type II receptors in rodent embryogenesis.
Int J Dev Biol
; 42(8): 1125-36, 1998 Nov.
Article
em En
| MEDLINE
| ID: mdl-9879710
ABSTRACT
The transforming growth factor-betas (TGF-betas) are multifunctional regulatory polypeptides that play a crucial role in many cell processes and function through a set of cell surface protein receptors that includes TGF-beta type I (RI) and type II (RII). The present study reports a comprehensive comparison of the patterns of expression of TGF-beta RI and RII proteins and mRNAs in the developing mouse embryo using immunohistochemical and in situ hybridization analyses. Although widespread expression of both TGF-beta receptors was detected throughout the embryonic development period so that many similarities occur in localization of the TGF-beta receptors, TGF-beta RI was expressed in a well-defined, non-uniform pattern that was different in many respects from that of TGF-beta RII. Whereas higher levels of TGF-beta RI compared to TGF-beta RII were detected in some tissues of the embryo at the beginning of organogenesis, the level of TGF-beta RII increased more dramatically than that of TGF-beta RI during late organogenesis; this was especially true in many neural structures where TGF-beta RI and RII were comparable by day 16. The lung, kidney and intestine, in which epithelial-mesenchymal interactions occur, showed a complex pattern of TGF-beta RI and Rll expression. Additionally, northern blot hybridization and reverse transcription-polymerase chain reaction (RT-PCR) amplification showed non-uniform expression of the transcripts for TGF-beta RI and RII in embryonic and adult mouse and rat tissues. These data show that regulation of TGF-beta1 RI and RII occurs concurrently, but distinctly, in a spatial and temporal manner in rodent embryogenesis which may allow control of signal transduction of TGF-beta during development.
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Base de dados:
MEDLINE
Assunto principal:
Transcrição Gênica
/
Biossíntese de Proteínas
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Expressão Gênica
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Proteínas Serina-Treonina Quinases
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Receptores de Fatores de Crescimento Transformadores beta
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Receptores de Ativinas Tipo I
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Embrião de Mamíferos
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article