中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (23): 3680-3685.doi: 10.12307/2024.397

• 骨组织构建 bone tissue construction • 上一篇    下一篇

白细胞介素1β调控信号素3A表达诱发椎间盘退变的机制

黄  杰1,2,蒋  强2,韩嘉恒1,2,刘  江2,张  燕2,卢正操2,丁  宇1,2   

  1. 1华南理工大学医学院,广东省广州市  510006;2解放军总医院第六医学中心中医医学部骨伤科,北京市  100048
  • 收稿日期:2023-05-26 接受日期:2023-07-08 出版日期:2024-08-18 发布日期:2023-09-13
  • 通讯作者: 丁宇,教授,主任医师,博士生导师,华南理工大学医学院,广东省广州市 510006;解放军总医院第六医学中心中医医学部骨伤科,北京市 100048
  • 作者简介:黄杰,男,1998年生,汉族,湖南省怀化市人,华南理工大学医学院在读硕士,主要从事脊柱外科方面的研究。
  • 基金资助:
    国家自然科学基金资助项目(82274637),项目负责人:丁宇

Mechanism by which interleukin-1beta regulates the expression of Semaphorin 3A to induce intervertebral disc degeneration

Huang Jie1, 2, Jiang Qiang2, Han Jiaheng1, 2, Liu Jiang2, Zhang Yan2, Lu Zhencao2, Ding Yu1, 2   

  1. 1Department of Orthopedics, School of Medicine, South China University of Technology, Guangzhou 510006, Guangdong Province, China; 2Orthopedics of TCM Senior Department, The Sixth Medical Center of PLA General Hospital, Beijing 100048, China
  • Received:2023-05-26 Accepted:2023-07-08 Online:2024-08-18 Published:2023-09-13
  • Contact: Ding Yu, Professor, Chief physician, Doctoral supervisor, Department of Orthopedics, School of Medicine, South China University of Technology, Guangzhou 510006, Guangdong Province, China; Orthopedics of TCM Senior Department, The Sixth Medical Center of PLA General Hospital, Beijing 100048, China
  • About author:Huang Jie, Master candidate, Department of Orthopedics, School of Medicine, South China University of Technology, Guangzhou 510006, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 82274637 (to DY)

摘要:


文题释义:

信号素3A:属于信号素蛋白家族,是一类分泌蛋白或跨膜蛋白,N端由神经素1和神经丛蛋白A耦合组成复合受体,通过胞内信号传导通路发挥其生物学作用。
盘源性腰痛:指由椎间盘本身的原因引起的腰痛,不伴有椎间盘突出和神经根受压,这种疼痛是由于纤维环破裂、血管肉芽组织长入椎间盘等因素诱发而来。


背景:信号素3A是重要的神经血管生长抑制因子,目前尚不清楚信号素3A是如何参与盘源性腰痛发病的,研究信号素3A在椎间盘退变中的潜在机制可为防治盘源性腰痛提供新的靶点和理论依据。

目的:通过激活核因子κB信号通路影响信号素3A的表达,探讨白细胞介素1β诱导大鼠椎间盘退变的机制。
方法:采用RT-qPCR检测人未退变与退变髓核组织内的信号素3A mRNA表达。分离培养SD大鼠髓核细胞,传代至第3代时分3组培养:空白对照组常规培养48 h,退变组加入10 ng/mL白细胞介素1β干预48 h,退变+抑制剂组加入5 µmol/L核因子κB信号通路特异性抑制剂BAY11-7082干预1 h后加入白细胞介素1β干预48 h。干预结束后,采用CCK-8法检测细胞活力,Annexin V/FITC染色法检测细胞凋亡,RT-qPCR检测细胞基质、血管、神经标志物及信号素3A的mRNA 表达,Western blot检测标志蛋白、核因子κB信号通路蛋白p65及p-p65的蛋白表达。

结果与结论:①RT-qPCR检测显示,人退变髓核组织内的信号素3A mRNA表达低于未退变髓核组织(P < 0.05);②CCK-8检测与Annexin V/FITC染色显示,与空白对照组比较,退变组髓核细胞活力降低、凋亡率增加(P < 0.05);与退变组比较,退变+抑制剂组髓核细胞活力升高、凋亡率降低(P < 0.05);③RT-qPCR检测显示,与空白对照组比较,退变组Ⅱ型胶原蛋白、聚蛋白多糖、信号素3A的mRNA表达降低(P < 0.05),CD31、神经丝蛋白200的mRNA表达升高(P < 0.05);与退变组比较,退变+抑制剂组Ⅱ型胶原蛋白、聚蛋白多糖、信号素3A的mRNA表达升高(P < 0.05),CD31、神经丝蛋白200的mRNA表达降低(P < 0.05);④Western blot检测显示,与空白对照组比较,退变组Ⅱ型胶原蛋白、聚蛋白多糖、信号素3A的蛋白表达降低(P < 0.05),CD31、神经丝蛋白200、p65及p-p65的蛋白表达升高(P < 0.05);与退变组比较,退变+抑制剂组Ⅱ型胶原蛋白、聚蛋白多糖、信号素3A的蛋白表达升高(P < 0.05),CD31、神经丝蛋白200、p65及p-p65的蛋白表达降低(P < 0.05);⑤结果表明,白细胞介素1β通过激活核因子κB信号通路抑制信号素3A的表达,同时促进细胞外基质的降解和椎间盘内血管神经的长入,可能为椎间盘退变及相关盘源性腰痛的诱发因素之一。

https://orcid.org/0000-0002-2097-9645(黄杰)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 白细胞介素1β, 核因子κB信号通路, 信号素3A, 椎间盘退变, 盘源性腰痛

Abstract: BACKGROUND: Semaphone 3A (Sema3A) is an important neurovascular growth inhibitor. It is not clear how Sema3A is involved in the pathogenesis of discogenic low back pain. Exploring the potential mechanism of Sema3A in intervertebral disc degeneration can provide a new target and theoretical basis for the prevention and treatment of discogenic low back pain.
OBJECTIVE: To explore the mechanism of interleukin-1β inhibiting the expression of Sema3A by activating the nuclear factor-κB signaling pathway to induce intervertebral disc degeneration in rats. 
METHODS: RT-qPCR was used to detect the expression of Sema3A mRNA in normal and degenerative human nucleus pulposus tissues. Nucleus pulposus cells of Sprague-Dawley rats were isolated, cultured, and passaged to the 3rd generation. Then, passage 3 cells were divided into three groups: the blank control group was routinely cultured for 48 hours, the degeneration group was intervened with 10 ng/mL interleukin 1β for 48 hours, and the degeneration+inhibitor group was treated by 5 µmol/L nuclear factor-κB signaling pathway-specific inhibitor BAY11-7082 for 1 hour, followed by interleukin-1β for 48 hours. At the end of the intervention, cell viability was detected by cell counting kit-8, cell apoptosis was detected by Annexin V/FITC staining, mRNA expression of cellular matrix, vascular and neural markers and Sema3A was detected by RT-qPCR, and protein expression of marker proteins, p65 and p-p65 was detected by western blot.
RESULTS AND CONCLUSION: RT-qPCR assay showed that the expression of Sema3A mRNA was lower in degenerative human nucleus pulposus tissue than in normal human nucleus pulposus tissue (P < 0.05). Compared with the blank control group, the nucleus pulposus cell viability decreased and the apoptotic rate increased in the degeneration group (P < 0.05); compared with the degeneration group, the nucleus pulposus cell viability increased and the apoptotic rate decreased in the degeneration + inhibitor group (P < 0.05). Compared with the blank control group, mRNA expression of type II collagen, polyproteoglycan, and Sema3A was decreased in the degeneration group (P < 0.05), while mRNA expression of CD31 and neurofilament 200 was increased (P < 0.05). Compared with the degeneration group, mRNA expression of type II collagen, polyproteoglycan, and Sema3A was elevated in the degeneration+inhibitor group (P < 0.05) and mRNA expression of CD31 and neurofilament 200 decreased (P < 0.05). Compared with the blank control group, the protein expression of type II collagen, polyproteoglycan, and Sema3A was decreased in the degeneration group (P < 0.05), and the protein expression of CD31, neurofilament protein 200, p65, and p-p65 was elevated (P < 0.05); compared with the degeneration group, the protein expression of type II collagen, polyproteoglycan, and Sema3A was elevated in the degeneration+inhibitor group (P < 0.05), and protein expression of CD31, neurofilament 200, p65, and p-p65 was decreased (P < 0.05). To conclude, interleukin-1β does inhibit the expression of Sema3A by activating the nuclear factor-κB signaling pathway, which can also increase the degradation of extracellular matrix, promote the innervation and angiogenesis in degenerative intervertebral disc, and may be one of potential factors that contribute to intervertebral disc degeneration and discogenic low back pain.

Key words: interleukin-1β, nuclear factor-κB signaling pathway, Sema3A, intervertebral disc degeneration, discogenic low back pain

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