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Special Issue:
动物科学合辑Animal Science
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| The expression, function, and coding potential of circular RNA circEDC3 in chicken skeletal muscle development |
| WEI Yuan-hang*, ZHAO Xi-yu*, SHEN Xiao-xu, YE Lin, ZHANG Yao, WANG Yan, LI Di-yan, ZHU Qing, YIN Hua-dong |
Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, P.R.China
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摘要
本研究旨在探讨circEDC3对鸡骨骼肌卫星细胞SMSCs增殖、分化和凋亡的调控功能，从而揭示circEDC3在鸡骨骼肌发育中的作用。我们构建了circEDC3的小干扰RNA (siRNA) 及过表达载体(pCD2.1-circEDC3)来调控体外培养的鸡原代骨骼肌卫星细胞中circEDC3的表达水平，通过运用Quantitative Real-Time PCR (qPCR)，Western Blot (WB)，Cell counting kit 8 (CCK-8)，5-Ethynyl-2’-Deoxyuridine (EdU)，flow cytometry，以及immunofluorescence等功能分析方法，检测发现circEDC3能抑制SMSCs增殖、分化相关基因的表达，阻滞细胞周期进程，降低增殖细胞比率，抑制分化相关蛋白的表达，抑制肌管形成，但对SMSCs的凋亡没有明显影响。circRNA通常可以通过靶向微小RNA (miRNAs) 来调控靶基因的表达，然而我们发现circEDC3并未直接靶向肌肉发育相关的miRNAs。此外有研究表明，circRNA可通过直接编码蛋白来调节骨骼肌发育，为了进一步探索circEDC3调控鸡骨骼肌发育的潜在机制，我们对circEDC3的编码能力进行了预测。通过对circEDC3序列信息进行分析，我们发现circEDC3在物种间 (鸡、人、小鼠、大鼠、猪) 保守，且具有不同的开放阅读框、内部核糖体进入位点 (IRES) 和N6-甲基腺苷 (m6A) 基序，表明circEDC3满足编码蛋白质的前提条件，具备一定程度的编码能力，但这仍需进一步的研究论证。总的来说，我们的研究发现了一个在物种间保守的环状RNA circEDC3，通过分析circEDC3的序列信息，预测该circRNA具有一定的蛋白质编码潜力，通过功能分析试验证明circEDC3是一种新的鸡肌肉发育的负调节因子，提示circEDC3可作为肉鸡分子育种的一个重要候选靶标，为肉鸡的育种改良提供新的切入点。
Abstract As an emerging class of non-coding transcripts, circular RNAs (circRNAs) are proved to participate in the complex process of myogenesis in diverse species. A previous study has identified circular RNA EDC3 (circEDC3) as a typical covalently closed circular RNA abundant in chicken skeletal muscle. This study found that circEDC3 is a conservative circular RNA and performed functional analysis to investigate the role of circEDC3 in chicken muscle growth. The results indicated that circEDC3 could inhibit (P<0.05) chicken skeletal muscle satellite cells (SMSCs) proliferation and differentiation but had no significant influence on SMSCs apoptosis. Additionally, bioinformatics analysis showed that circEDC3 had promising coding potential. The open reading frames (ORF) were found in circEDC3 in this study. Furthermore, this study predicted that circEDC3 had internal ribosome entry sites (IRES) and N6-methyladenosine (m6A) motifs in different species, implying that circEDC3 might be translatable. This study revealed that circEDC3 might be a negative regulator in chicken muscle development and suggested it has protein-coding potential in different species.
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Received: 26 December 2020
Accepted: 30 August 2021
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Fund: This research was funded by the Sichuan Science and Technology Program, China (2018JY0488, 2016NYZ0050 and 2016NZ0104).
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| About author: WEI Yuan-hang, E-mail: weiyuanhang@stu.sicau.edu.cn; ZHAO Xi-yu, E-mail: 739803368@qq.com; Correspondence YIN Hua-dong, Tel: +86-28-82621602, E-mail: yinhuadong@sicau.edu.cn
* These authors contributed equally to this study. |
Cite this article:
WEI Yuan-hang, ZHAO Xi-yu, SHEN Xiao-xu, YE Lin, ZHANG Yao, WANG Yan, LI Di-yan, ZHU Qing, YIN Hua-dong.
2022.
The expression, function, and coding potential of circular RNA circEDC3 in chicken skeletal muscle development. Journal of Integrative Agriculture, 21(5): 1444-1456.
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