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[The expression of TGF beta-related mRNAs in the early development of Xenopus]
Abstract:
Using porcine TGF beta 1-cDNA probe, we found that three TGF beta-related mRNAs (4.2 kb, 3.2 kb and 2.3 kb) were detected in blastula (Stg. 7/8). The 4.2 kb and 3.2 kb mRNAs were very highly expressed in the blastula (Fig. 3). However, we could hardly detect them in embryos of cleavage, gestrula and neurula stages. On the other hand, the 2.3 kb mRNA could be identified in embryos of cleavage stages, blastula, gastrula and neurula and the quantity was rather stable. Comparing the quantities of TGF beta-related mRNAs in different parts of blastula, that is, animal half or vegetal half and dorsal or ventral half, we found that the transcripts were enriched in the vegetal hemisphere (Fig. 6). But no obvious difference between dorsal and ventral halves could be detected (Fig. 7).
Insights
Transforming growth factor beta (TGF-β) related messenger RNAs (mRNAs) are highly expressed in porcine blastula. These TGF-β mRNAs are predominantly found in the vegetal hemisphere of the blastula.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Context:
- Transforming growth factor beta (TGF-β) signaling plays crucial roles in embryonic development.
- Understanding the temporal and spatial expression of TGF-β related genes is vital for deciphering developmental processes.
Purpose:
- To investigate the expression patterns of TGF-β related mRNAs during early porcine embryonic development.
- To determine the localization of TGF-β related mRNAs within the blastula stage embryo.
Summary:
- Three TGF-β related mRNA transcripts (4.2 kb, 3.2 kb, and 2.3 kb) were identified in porcine blastula (Stage 7/8).
- The 4.2 kb and 3.2 kb mRNAs showed high expression in blastula but were barely detectable in cleavage, gastrula, and neurula stages.
- The 2.3 kb mRNA was stably expressed across cleavage, blastula, gastrula, and neurula stages.
- TGF-β related mRNA transcripts were found to be enriched in the vegetal hemisphere of the blastula, with no significant difference observed between dorsal and ventral halves.
Impact:
- This study provides insights into the specific expression profiles of TGF-β related mRNAs during early pig embryogenesis.
- The findings highlight the potential importance of TGF-β signaling in blastula development and vegetal pole specification.
- Establishes a foundation for further research into the functional roles of specific TGF-β isoforms in porcine embryonic development.