The Beneficial Role of the Thyroid Hormone Receptor Beta 2 (thrb2) in Facilitating the First Feeding and Subsequent Growth in Medaka as Fish Larval Model.

IF 5.1 2区 生物学 Q2 CELL BIOLOGY
Cells Pub Date : 2025-03-06 DOI:10.3390/cells14050386
Jiaqi Wu, Ke Lu, Ruipeng Xie, Chenyuan Zhu, Qiyao Luo, Xu-Fang Liang
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引用次数: 0

Abstract

During the early growth stages of fish larvae, there are significant challenges to their viability, so improving their visual environment is essential to promoting their growth and survival. Following the successful knockout of thyroid hormone receptor beta 2 (thrb2) using Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/Cas9 technology, there was an increase in the expression of UV opsin (short-wave-sensitive 1, sws1), while the expression of other cone opsins was significantly decreased. Further analysis of the retinal structure demonstrated that the thrb2 knockout resulted in an increased lens thickness and a decreased thickness of the ganglion cell layer (GCL), outer plexiform layer (OPL), and outer nuclear layer (ONL) in the retina. The slowing down of swimming speed under light conditions in thrb2-/- may be related to the decreased expression of phototransduction-related genes such as G protein-coupled receptor kinase 7a (grk7a), G protein-coupled receptor kinase 7b (grk7b), and phosphodiesterase 6c (pde6c). Notably, thrb2-/- larvae exhibited a significant increase in the amount and proportion of first feeding, and their growth rate significantly exceeded that of wild-type controls during the week after feeding. This observation suggests that although the development of the retina may be somewhat affected, thrb2-/- larvae show positive changes in feeding behaviour and growth rate, which may be related to their enhanced ability to adapt to their environment. These results provide novel insights into the function of the thrb2 gene in the visual system and behaviour and may have implications in areas such as fish farming and genetic improvement.

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来源期刊
Cells
Cells Biochemistry, Genetics and Molecular Biology-Biochemistry, Genetics and Molecular Biology (all)
CiteScore
9.90
自引率
5.00%
发文量
3472
审稿时长
16 days
期刊介绍: Cells (ISSN 2073-4409) is an international, peer-reviewed open access journal which provides an advanced forum for studies related to cell biology, molecular biology and biophysics. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
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