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Light-induced local gene expression in primary chick cell culture system
Keiichi Kitajima1,2,3, Naofumi Kawahira3,4, Sang-Woo Lee3
1Department of Ecological Developmental Adaptability Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
Development, Growth & Differentiation
|March 18, 2021
Summary
A novel light-dependent gene expression system offers precise control in chicken cells. This method allows for gradual, multi-step regulation of gene expression, aiding in the study of gene function.
Area of Science:
- Developmental Biology
- Molecular Genetics
- Cell Biology
Background:
- Precise control of gene expression in specific tissues or cells is crucial for understanding gene function.
- Existing gene introduction methods in chick models (retrovirus, electroporation, etc.) have limitations in achieving localized gene expression induction.
Purpose of the Study:
- To demonstrate the efficacy of a light-dependent gene expression system (LightOn) in primary chicken cell cultures.
- To investigate the impact of light irradiation conditions on gene expression level and specificity.
- To explore the potential of this system for studying gene function with gradual expression changes.
Main Methods:
- Utilized a light-dependent system employing the Neurospora crassa photoreceptor Vivid fused with Gal4 DNA binding and p65 activation domains (GAVPO).
- Applied the system in primary chicken cell cultures, manipulating gene expression via controlled light stimulus.
- Investigated the effects of varying light irradiation intervals and conditions on gene expression modulation.
- Regulated Sox9 expression in chick limb mesenchyme cells to observe downstream effects.
Main Results:
- Gene expression level and induction specificity were found to be highly dependent on light irradiation conditions, particularly the irradiation interval.
- Shorter irradiation intervals led to higher induction specificity.
- The system enabled multi-step regulation of gene expression levels, unlike binary on/off methods.
- Induced SOX9 protein successfully modulated downstream gene expression in chick limb mesenchyme cells.
Conclusions:
- The light-dependent expression control method is effective for precise, localized gene manipulation in chicken models.
- This technique allows for nuanced examination of gene function by enabling gradual changes in gene expression levels.
- The system holds promise for advancing research in chick developmental biology and gene function analysis.
