中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (33): 5363-5369.doi: 10.12307/2023.498

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

耐受性树突状细胞可抑制胶原诱导性关节炎大鼠脾脏细胞的焦亡

龙调玉1,包伦敏2,万秀方1,李红红1,张云东2,蒋红梅1   

  1. 1贵州医科大学医学检验学院临床微生物学及免疫学教研室,贵州省贵阳市  550025;2安顺市人民医院医学检验科,贵州省安顺市  561000
  • 收稿日期:2022-06-16 接受日期:2022-07-27 出版日期:2023-11-28 发布日期:2023-03-30
  • 通讯作者: 蒋红梅,博士,教授,博士生、硕士生导师,贵州医科大学医学检验学院临床微生物学及免疫学教研室,贵州省贵阳市 550025
  • 作者简介:龙调玉,女,1998年生,贵州省锦屏县人,苗族,贵州医科大学在读硕士,初级检验师,主要从事免疫相关性疾病的机制和防治研究。
  • 基金资助:
    国家自然科学基金地区科学基金(81960393),项目负责人:蒋红梅;贵州省普通本科高校自然科学研究创新群体项目(黔教合KY字[2021]016),项目领衔人:蒋红梅

Tolerogenic dendritic cells can inhibit pyroptosis of spleen cells in collagen-induced arthritis rats

Long Tiaoyu1, Bao Lunmin2, Wan Xiufang1, Li Honghong1, Zhang Yundong2, Jiang Hongmei1   

  1. 1Department of Clinical Microbiology and Immunology, School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550025, Guizhou Province, China; 2Department of Laboratory Medicine, People’s Hospital of Anshun City, Anshun 561000, Guizhou Province, China
  • Received:2022-06-16 Accepted:2022-07-27 Online:2023-11-28 Published:2023-03-30
  • Contact: Jiang Hongmei, MD, Professor, Doctoral supervisor, Master’s supervisor, Department of Clinical Microbiology and Immunology, School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550025, Guizhou Province, China
  • About author:Long Tiaoyu, Master candidate, Department of Clinical Microbiology and Immunology, School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550025, Guizhou Province, China
  • Supported by:
    the Regional Science Fund Project of National Natural Science Foundation of China, No. 81960393 (to JHM); the Project of Natural Science Research Innovation Group of General Undergraduate Colleges in Guizhou Province, No. KY[2021]016 (to JHM)

摘要:


文题释义:

耐受性树突状细胞:耐受性树突状细胞在共刺激分子表达方面介于未成熟树突状细胞和成熟树突状细胞之间的中间表型,可诱导T淋巴细胞的低反应性或无能,具有免疫抑制能力,产生高水平抗炎细胞因子白细胞介素10、低水平白细胞介素12和白细胞介素23。
焦亡:是一种全新的程序性细胞死亡模式,涉及炎症小体多蛋白复合物的激活,主要特征是细胞膜穿孔、细胞肿胀、内容物释放,引起炎症反应。

背景:课题组前期利用核因子κB寡核苷酸诱骗剂成功构建了抗原特异性耐受性树突状细胞,并用其对胶原诱导性关节炎大鼠模型进行了有效干预,但治疗机制仍有待进一步研究。
目的:探讨耐受性树突状细胞对胶原诱导性关节炎大鼠脾脏细胞焦亡的影响。
方法:提取骨髓源树突状细胞,利用核因子κB寡核苷酸诱骗剂构建耐受性树突状细胞。取9只SD大鼠,采用随机数字表法随机分为正常组、模型组、治疗组,每组3只,模型组、治疗组建立胶原诱导性关节炎模型(初次免疫:左足跖部皮内注射牛Ⅱ型胶原乳剂;加强免疫:初次免疫后第14天,尾根部多点注射牛Ⅱ型胶原乳剂),初次免疫后第20天分别尾静脉注射生理盐水、耐受性树突状细胞,初次免疫后第35天,进行相关检测。

结果与结论:①关节炎指数评分:治疗组大鼠关节炎指数评分低于模型组(P < 0.05);②足踝关节大体与病理观察:模型组大鼠踝关节严重肿胀,治疗组大鼠踝关节轻度肿胀;苏木精-伊红染色显示,与正常组相比,模型组大鼠足踝关节滑膜明显增生,伴有炎性细胞浸润和骨侵蚀;与模型组相比,治疗组大鼠足踝关节滑膜增生减低、骨侵蚀和炎性细胞浸润减少;③血清白细胞介素1β水平:模型组大鼠血清白细胞介素1β水平高于正常组(P < 0.05),治疗组大鼠血清白细胞介素1β水平低于模型组(P < 0.05);④脾脏相关蛋白表达:Western blot检测显示,与正常组相比,模型组大鼠脾脏NLRP3、pro-caspase-1、caspase-1、GSDMD-NT、白细胞介素1β前体、白细胞介素1β的蛋白表达均增高(P < 0.05);与模型组大鼠相比,治疗组大鼠脾脏NLRP3、pro-caspase-1、caspase-1、GSDMD-NT、白细胞介素1β前体、白细胞介素1β的蛋白表达均下降(P < 0.05);⑤结果表明,耐受性树突状细胞可能通过抑制脾脏细胞焦亡和促炎细胞因子白细胞介素1β的释放,缓解胶原诱导性关节炎模型大鼠的炎症反应。

https://orcid.org/0000-0001-8247-7598(龙调玉) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 耐受性树突状细胞, 胶原诱导性关节炎, NLRP3, 白细胞介素1β, 细胞焦亡, 类风湿关节炎

Abstract: BACKGROUND: In our previous study, we successfully constructed antigen-specific tolerogenic dendritic cells using nuclear factor-kappa B oligodeoxynucleotide decoy, and used them to effectively intervene a collagen-induced arthritis rat model. However, the therapeutic mechanism remains to be further studied.
OBJECTIVE: To investigate the effect of tolerogenic dendritic cells on pyroptosis of spleen cells in collagen-induced arthritis rats.  
METHODS: Bone marrow-derived dendritic cells were extracted and used to construct tolerogenic dendritic cells using nuclear factor-kappa B oligodeoxynucleotide decoy. Nine Sprague-Dawley rats were randomly divided into control group, model group, and treatment group, with three rats in each group. The latter two groups were used to establish rheumatoid arthritis models. Initial immunization was subcutaneous injection of bovine type II collagen emulsion on the left foot plantar; booster immunization was multiple injections of bovine type II collagen emulsion at the base of the tail on the 14th day after the initial immunization. Rats in the model and treatment groups were given normal saline and tolerogenic dendritic cells into the tail vein, respectively, on the 20th day after the initial immunization. Relevant measurements were performed on the 35th day after the initial immunization. 
RESULTS AND CONCLUSION: (1) Compared with the model group, arthritis index score in the treatment group decreased significantly (P < 0.05). (2) Gross and pathological observations showed the ankle joints of the rats were severely swollen in the model group and slightly swollen in the treatment group. Hematoxylin-eosin staining results showed that compared with the control group, the synovium of the ankle joint had obvious hyperplasia, accompanied by inflammatory cell infiltration and bone erosion; compared with the model group, the treatment group had reduced synovial hyperplasia, bone erosion and inflammatory cell infiltration of the ankle joint. (3) Serum interleukin 1β level was higher in the model group than the control group (P < 0.01) and lower in the treatment group than the model group (P < 0.01). (4) Western blot results showed that compared with the control group, the protein expressions of NLR family pyrin domain containing 3, pro-caspase-1, caspase-1, GSDMD-NT, pro-interleukin 1β, and interleukin 1β in the spleen were significantly increased in the model group (P < 0.05). Compared with the model group, the protein expressions of spleen NLR family pyrin domain containing 3, pro-caspase-1, caspase-1, GSDMD-NT, pro-interleukin 1β, and interleukin 1β were all decreased in the treatment group (P < 0.05). (5) In conclusion, tolerogenic dendritic cells may alleviate inflammatory responses in collagen-induced arthritis rats by inhibiting the pyroptosis of spleen cells and the expression of interleukin-1β. 

Key words: tolerogenic dendritic cell, collagen-induced arthritis, NLRP3, interleukin 1β, pyroptosis, rheumatoid arthritis

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