Related Experiment Videos
Growth factor expression in skin during wool follicle development
R Sutton1, W G Ward, K A Raphael
1Division of Animal Production, CSIRO, Sydney, Australia.
Summary
Transforming growth factor beta 1 (TGF-β1) expression in sheep skin may signal the initiation of wool follicle development. This study developed RT-PCR methods to track key growth factors during ovine gestation.
Area of Science:
- Developmental Biology
- Molecular Biology
- Animal Science
Background:
- Wool follicle morphogenesis involves various growth factors.
- Direct comparison of growth factor expression is crucial for understanding follicular development.
Purpose of the Study:
- To develop and utilize reverse transcriptase-polymerase chain reactions (RT-PCR) for simultaneous analysis of multiple growth factors in ovine and murine skin.
- To investigate the expression patterns of specific growth factors during ovine foetal development.
Main Methods:
- Developed RT-PCR assays for ovine and murine TGF-α, TGF-β1, TGF-β2, TGF-β3, IGF1, IGF2, and FGF-2.
- Analyzed mRNA expression in 16 sheep RNA samples from various foetal stages and neonatal sheep, as well as mouse skin.
Main Results:
- Detected mRNAs for the studied growth factors throughout ovine gestation.
- Transforming growth factor beta 1 (TGF-β1) mRNA was notably absent in 51-day-old sheep skin but present in 54-day and older samples.
- Follicle initiation in sheep is microscopically observed around 62 days of gestation.
Conclusions:
- The expression of TGF-β1 in sheep skin correlates with the timing of wool follicle initiation.
- TGF-β1 may serve as a critical signaling molecule for initiating wool follicle development during gestation.