Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, 210042, Nanjing, China.
Dermatology and Venereology Division, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, 17176, Stockholm, Sweden.
Nat Commun. 2024 Oct 5;15(1):8637. doi: 10.1038/s41467-024-52783-8.
The cell transition from an inflammatory phase to a subsequent proliferative phase is crucial for wound healing, yet the driving mechanism remains unclear. By profiling lncRNA expression changes during human skin wound healing and screening lncRNA functions, we identify SNHG26 as a pivotal regulator in keratinocyte progenitors underpinning this phase transition. Snhg26-deficient mice exhibit impaired wound repair characterized by delayed re-epithelization accompanied by exacerbated inflammation. Single-cell transcriptome analysis combined with gain-of-function and loss-of-function of SNHG26 in vitro and ex vivo reveals its specific role in facilitating inflammatory-to-proliferative state transition of keratinocyte progenitors. A mechanistic study unravels that SNHG26 interacts with and relocates the transcription factor ILF2 from inflammatory genomic loci, such as JUN, IL6, IL8, and CCL20, to the genomic locus of LAMB3. Collectively, our findings suggest that lncRNAs play cardinal roles in expediting tissue repair and regeneration and may constitute an invaluable reservoir of therapeutic targets in reparative medicine.
细胞从炎症期向随后的增殖期的转变对伤口愈合至关重要,但驱动机制尚不清楚。通过对人皮肤伤口愈合过程中 lncRNA 表达变化进行分析,并筛选 lncRNA 的功能,我们发现 SNHG26 是角质细胞祖细胞中一个关键的调控因子,为这一转变提供支持。Snhg26 缺陷小鼠表现出伤口修复受损的特征,表现为再上皮化延迟,同时炎症加剧。单细胞转录组分析结合 SNHG26 在体外和体内的功能获得和功能丧失实验,揭示了其在促进角质细胞祖细胞从炎症状态向增殖状态转变中的特定作用。一项机制研究表明,SNHG26 与转录因子 ILF2 相互作用,并将其从 JUN、IL6、IL8 和 CCL20 等炎症基因组座重新定位到 LAMB3 的基因组座。总之,我们的研究结果表明,lncRNAs 在加速组织修复和再生中起着重要作用,可能成为修复医学中极具价值的治疗靶点库。
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