CircTTC3 regulates the osteogenic differentiation of adipose-derived mesenchymal stem cells via miR-205/Smad3 axis

IF 3.5 3区 生物学 Q3 CELL BIOLOGY
Qiuling Zhang , Zeyou Guo , Wenzhong Hu, Weibing Tang, Xinzhe Gao, Cong Han, Xinyu Wang, Pei Gong, Jie Long
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引用次数: 0

Abstract

Adipose-derived mesenchymal stem cells (ADSCs) hold great promise for bone tissue repair and regeneration. Circular RNAs (circRNAs) play a crucial role in regulating the osteogenic differentiation and bone remodeling of ADSCs; however, the underlying molecular mechanisms remain unclear. In this study, we conducted whole transcriptome sequencing (WTS) on ADSCs and constructed a competing endogenous RNA (ceRNA) regulatory network to identify the circTTC3/miR-205/mothers against decapentaplegic homolog 3 (Smad3) signaling axis. Subsequently, we used Sanger sequencing and agarose gel electrophoresis to verify the cyclization of circTTC3. We confirmed that circTTC3 promotes the osteogenic differentiation of ADSCs and demonstrated that circTTC3 co-localizes with miR-205 in the cytoplasm. Additionally, we showed that circTTC3 sponges miR-205 using dual-luciferase reporter assays and fluorescent in situ hybridization (FISH) experiments. Moreover, miR-205 targets the 3′ untranslated region (UTR) of Smad3. Rescue experiments further verified that circTTC3 mediates the osteogenic differentiation of ADSCs through the miR-205/Smad3 pathway. Finally, in vivo, animal studies revealed that circTTC3 overexpression enhances cranial defect repair while silencing circTTC3 disrupts new bone formation.
CircTTC3通过miR-205/Smad3轴调控脂肪源性间充质干细胞的成骨分化。
脂肪源性间充质干细胞(ADSCs)在骨组织修复和再生方面具有很大的前景。环状rna (circRNAs)在调节ADSCs成骨分化和骨重塑中发挥关键作用;然而,潜在的分子机制尚不清楚。在本研究中,我们对ADSCs进行了全转录组测序(WTS),并构建了竞争性内源性RNA (ceRNA)调控网络,以鉴定circTTC3/miR-205/母亲对抗decapentapletic homolog 3 (Smad3)信号轴。随后,我们使用Sanger测序和琼脂糖凝胶电泳来验证circTTC3的环化。我们证实circTTC3促进ADSCs的成骨分化,并证明circTTC3在细胞质中与miR-205共定位。此外,我们通过双荧光素酶报告基因检测和荧光原位杂交(FISH)实验表明,circTTC3海绵miR-205。此外,miR-205靶向Smad3的3'未翻译区(UTR)。救援实验进一步证实circTTC3通过miR-205/Smad3通路介导ADSCs成骨分化。最后,在体内,动物研究显示circTTC3过表达促进颅骨缺陷修复,而沉默circTTC3会破坏新骨的形成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Experimental cell research
Experimental cell research 医学-细胞生物学
CiteScore
7.20
自引率
0.00%
发文量
295
审稿时长
30 days
期刊介绍: Our scope includes but is not limited to areas such as: Chromosome biology; Chromatin and epigenetics; DNA repair; Gene regulation; Nuclear import-export; RNA processing; Non-coding RNAs; Organelle biology; The cytoskeleton; Intracellular trafficking; Cell-cell and cell-matrix interactions; Cell motility and migration; Cell proliferation; Cellular differentiation; Signal transduction; Programmed cell death.
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