Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, Zhejiang Province, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, Zhejiang Province, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
Biochem Pharmacol. 2023 Dec;218:115865. doi: 10.1016/j.bcp.2023.115865. Epub 2023 Oct 18.
Intervertebral disc degeneration (IVDD) is a prevalent degenerative disease with significant adverse implications for patients' quality of life and socioeconomic status. Although the precise etiology of IVDD remains elusive, the senescence of nucleus pulposus cells is recognized as the primary pathogenic factor of IVDD; however, drugs that may targetedly inhibit senescence are still lacking. In the current study, we evaluated the small-molecule active drug 20-Deoxyingenol(20-DOI) for its effects on combating senescence and delaying the progression of IVDD. In vitro experiments revealed that the administration of 20-DOI displayed inhibitory effects on senescence and the senescence-related cGAS-STING pathway of nucleus pulposus cells. Additionally, it exhibited the ability to enhance lysosome activity and promote autophagy flux within nucleus pulposus cells. Subsequent investigations elucidated that the inhibitory impact of 20-DOI on nucleus pulposus cell senescence was mediated through the autophagy-lysosome pathway. This effect was diminished in the presence of transcription factor EB (TFEB) small hairpin RNA (shRNA), thereby confirming the regulatory role of 20-DOI on the autophagy-lysosome pathway and senescence through TFEB. In vivo experiments demonstrated that 20-DOI effectively impeded the progression ofIVDD in rats. These findings collectively illustrate that 20-DOI may facilitate the autophagy-lysosomal pathway by activating TFEB, thereby suppressing the senescence in nucleus pulposus cells, thus suggesting 20-DOI as a promising therapeutic approach for IVDD.
椎间盘退行性病变(IVDD)是一种常见的退行性疾病,对患者的生活质量和社会经济地位有重大的不利影响。尽管 IVDD 的确切病因仍不清楚,但已认识到髓核细胞衰老是 IVDD 的主要致病因素;然而,目前仍缺乏可能针对衰老进行靶向治疗的药物。在本研究中,我们评估了小分子活性药物 20-脱氧精氨酸(20-DOI)在对抗衰老和延缓 IVDD 进展方面的作用。体外实验表明,20-DOI 的给药对髓核细胞衰老和衰老相关的 cGAS-STING 途径具有抑制作用。此外,它还表现出增强髓核细胞溶酶体活性和促进自噬流的能力。随后的研究表明,20-DOI 对髓核细胞衰老的抑制作用是通过自噬溶酶体途径介导的。当存在转录因子 EB(TFEB)小发夹 RNA(shRNA)时,这种作用会减弱,从而证实了 20-DOI 通过 TFEB 对自噬溶酶体途径和衰老的调节作用。体内实验表明,20-DOI 可有效抑制大鼠 IVDD 的进展。这些发现共同表明,20-DOI 可通过激活 TFEB 促进自噬溶酶体途径,从而抑制髓核细胞衰老,提示 20-DOI 可能是 IVDD 的一种有前途的治疗方法。