Sui Menghua, Zhong Zhenyu, Tian Lichan, Liang Shuangshuang, Wang Xinmiao, Li Minghao, Wang Xin
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
FASEB J. 2025 Jun 30;39(12):e70764. doi: 10.1096/fj.202500381R.
Hair follicles regenerate spontaneously through a cycle of anagen, catagen, and telogen, and this cycle is driven by hair follicle stem cells (HFSCs). Long non-coding RNAs (lncRNAs) have previously been implicated in hair follicle cycling processes. According to the previous lncRNA sequencing results of cashmere goats, an annotated lncRNA XR_310056.1, referred to as lnc056, was found to be differentially expressed during the hair follicle cycle. Here, the purpose of this study was to determine whether lnc056 affects the proliferation of HFSCs by regulating thyroid hormone receptor interactor 6 (TRIP6) expression in combination with the transcription factor HNRNPUL1. The expression of lnc056 in HFSCs was detected by RT-qPCR. HFSCs were then treated with lnc056 and TRIP6 overexpressing adenovirus, si-HNRNPUL1, and si-TRIP6 to detect cell viability and proliferation. In addition, we investigated the binding between lnc056 and HNRNPUL1 or HNRNPUL1 and TRIP6. Finally, the biological function of lnc056 through the HNRNPUL1/TRIP6 axis was verified by target gene recovery experiments. Lnc056 was expressed in the nuclei of HFSCs, and its overexpression promoted the proliferation of cells. Moreover, lnc056 was found to bind to the transcription factor HNRNPUL1 and promoted TRIP6 expression. Furthermore, recovery assays demonstrated that lnc056 promoted the proliferation of HFSCs via the HNRNPUL1/TRIP6 axis. In summary, the results of this study suggested that lnc056 up-regulated the expression of TRIP6 by binding to the transcription factor HNRNPUL1, thereby accelerating the proliferation of HFSCs. This study enriches the molecular mechanism of lncRNA in the hair follicle cycle and provides a potential therapeutic target for hair loss.
毛囊通过生长期、退行期和休止期的循环自发再生,这个循环由毛囊干细胞(HFSCs)驱动。长链非编码RNA(lncRNAs)先前已被证明参与毛囊循环过程。根据先前对绒山羊的lncRNA测序结果,发现一个注释为XR_310056.1的lncRNA,称为lnc056,在毛囊周期中差异表达。在此,本研究的目的是确定lnc056是否通过与转录因子HNRNPUL1结合来调节甲状腺激素受体相互作用因子6(TRIP6)的表达,从而影响HFSCs的增殖。通过RT-qPCR检测lnc056在HFSCs中的表达。然后用lnc056和TRIP6过表达腺病毒、si-HNRNPUL1和si-TRIP6处理HFSCs,以检测细胞活力和增殖。此外,我们研究了lnc056与HNRNPUL1之间或HNRNPUL1与TRIP6之间的结合。最后,通过靶基因拯救实验验证了lnc056通过HNRNPUL1/TRIP6轴的生物学功能。Lnc056在HFSCs的细胞核中表达,其过表达促进细胞增殖。此外,发现lnc056与转录因子HNRNPUL1结合并促进TRIP6表达。此外,拯救实验表明lnc056通过HNRNPUL1/TRIP6轴促进HFSCs的增殖。总之,本研究结果表明lnc056通过与转录因子HNRNPUL1结合上调TRIP6的表达,从而加速HFSCs的增殖。本研究丰富了lncRNA在毛囊周期中的分子机制,并为脱发提供了潜在的治疗靶点。
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