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[Influence of CRX gene on development of photoreceptors in zebrafish]
Yan-qiong Zhang1, Yue-xiang Wang, Ge-zhi Xu
1Department of Ophthalmology, Eye and ENT Hospital, Fudan University, Shanghai 200031, China. yanqiongzhang401@yahoo.com.cn
Objective:
To study the development and opsin expression of zebrafish photoreceptors after CRX gene knock-down.
Methods:
It was a experimental study. CRX-MOs was microinjected into the zygote of zebrafish. Seventy-two and 96 hours post fertilization, we prepared the eye histological slides, electron microscope samples and whole mount in-situ hybridizations to study the development and opsin expression. of photoreceptors.
Results:
There were no obvious histological changes in optical microscope observation after CRX-MOs microinjection. Outer segments were developed in control and blank groups, but no obvious outer segment was found in CRX group by electron microscope observation. Opsin Rho, SWS1 and SWS2 were expressed in control and blank groups and the expression of these genes was obviously decreased in CRX group.
Conclusion:
CRX gene can influence the development and opsins expression of photoreceptors outer segments in zebrafish.
Insights
CRX gene knockdown in zebrafish disrupted photoreceptor outer segment development and decreased opsin expression, impacting visual function. This study highlights CRX
Area of Science:
- Developmental biology
- Molecular genetics
- Neuroscience
Context:
- Photoreceptors are essential for vision.
- CRX (Cone-rod homeobox) is a key transcription factor in photoreceptor development.
- Understanding CRX function is crucial for photoreceptor research.
Purpose:
- To investigate the role of the CRX gene in zebrafish photoreceptor development.
- To examine the effect of CRX gene knockdown on opsin expression in zebrafish.
Summary:
- CRX gene knockdown via morpholinos (CRX-MOs) was performed in zebrafish embryos.
- Electron microscopy revealed impaired outer segment development in CRX-knockdown photoreceptors.
- In situ hybridization showed significantly reduced expression of opsins (Rho, SWS1, SWS2) in CRX-knockdown zebrafish.
Impact:
- CRX gene is critical for the proper development of photoreceptor outer segments.
- CRX influences the expression of key visual pigment genes (opsins).
- Findings provide insights into the molecular mechanisms of photoreceptor differentiation and visual pigment formation.
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