WAKMAR2,一种在人类慢性伤口中下调的长非编码 RNA,调节角质形成细胞的迁移和炎症趋化因子的产生。
WAKMAR2, a Long Noncoding RNA Downregulated in Human Chronic Wounds, Modulates Keratinocyte Motility and Production of Inflammatory Chemokines.
机构信息
Dermatology and Venereology Section, Department of Medicine (Solna), Karolinska Institute, Stockholm, Sweden.
Department of Dermatology, The Second Hospital of Dalian Medical University, Dalian, China.
出版信息
J Invest Dermatol. 2019 Jun;139(6):1373-1384. doi: 10.1016/j.jid.2018.11.033. Epub 2018 Dec 27.
Chronic wounds represent a major and growing health and economic burden worldwide. A better understanding of molecular mechanisms of normal as well as impaired wound healing is needed to develop effective treatment. Herein we studied the potential role of long noncoding RNA LOC100130476 in skin wound repair. LOC100130476 is an RNA polymerase II-encoded polyadenylated transcript present in both cytoplasm and nucleus. We found that its expression was lower in wound-edge keratinocytes of human chronic wounds compared to normal wounds of healthy donors and intact skin. In cultured keratinocytes, LOC100130476 expression was induced by TGF-β signaling. By reducing LOC100130476 expression with antisense oligos or activating its transcription with CRISPR/Cas9 Synergistic Activation Mediator system, we showed that LOC100130476 restricted the production of inflammatory chemokines by keratinocytes, while enhancing cell migration. In line with this, knockdown of LOC100130476 impaired re-epithelization of human ex vivo wounds. Based on these results, we named LOC100130476 wound and keratinocyte migration-associated long noncoding RNA 2 (WAKMAR2). Moreover, we identified a molecular network that may mediate the biological function of WAKMAR2 in keratinocytes using microarray. In summary, our data suggest that WAKMAR2 is an important regulator of skin wound healing and its deficiency may contribute to the pathogenesis of chronic wounds.
慢性伤口是全球范围内一个主要且日益严重的健康和经济负担。为了开发有效的治疗方法,我们需要更好地了解正常和受损伤口愈合的分子机制。在此,我们研究了长非编码 RNA LOC100130476 在皮肤伤口修复中的潜在作用。LOC100130476 是一种 RNA 聚合酶 II 编码的多聚腺苷酸化转录本,存在于细胞质和细胞核中。我们发现,与健康供体的正常伤口和完整皮肤相比,其在慢性伤口边缘角质形成细胞中的表达较低。在培养的角质形成细胞中,LOC100130476 的表达受 TGF-β 信号诱导。通过用反义寡核苷酸降低 LOC100130476 的表达或用 CRISPR/Cas9 协同激活介体系统激活其转录,我们表明 LOC100130476 限制了角质形成细胞中炎症趋化因子的产生,同时增强了细胞迁移。与此一致,LOC100130476 的敲低会损害人离体伤口的再上皮化。基于这些结果,我们将 LOC100130476 命名为伤口和角质形成细胞迁移相关长非编码 RNA 2(WAKMAR2)。此外,我们使用微阵列鉴定了一个可能介导 WAKMAR2 在角质形成细胞中生物学功能的分子网络。总之,我们的数据表明 WAKMAR2 是皮肤伤口愈合的重要调节剂,其缺乏可能导致慢性伤口的发病机制。