中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (23): 3721-3727.doi: 10.12307/2022.673

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

树鼩成纤维样滑膜细胞分离鉴定及TLR8通路相关分子检测方法的建立

周凡琦1,2,3,李宝莹1,2,王凯涛1,谭荃荃1,运晨霞1,2,冷  静1,2   

  1. 1广西中医药大学基础医学院,广西壮族自治区南宁市  530200;2广西高发传染病中西医结合转化医学重点实验室,广西壮族自治区南宁市 530200;3柳州人民医院检验科,广西壮族自治区柳州市  545000
  • 收稿日期:2021-07-14 接受日期:2021-08-13 出版日期:2022-08-18 发布日期:2022-02-23
  • 通讯作者: 运晨霞,教授,广西中医药大学基础医学院,广西壮族自治区南宁市 530200;广西高发传染病中西医结合转化医学重点实验室,广西壮族自治区南宁市 530200 冷静,教授,广西中医药大学基础医学院,广西壮族自治区南宁市 530200;广西高发传染病中西医结合转化医学重点实验室,广西壮族自治区南宁市 530200
  • 作者简介:周凡琦,女,1996年生,贵州省纳雍县人,汉族,硕士,主要从事天然免疫识别受体及机制研究。 李宝莹,女,1993年生,广东省江门市人,汉族,硕士,主要从事中医药防治疾病的现代科学基础研究。
  • 基金资助:
    国家自然科学基金地区项目(31660632),项目负责人:运晨霞;广西科技厅自然基金面上项目(2016GXNSFAA380179),项目负责人:运晨霞;广西中医药大学硕士研究生创新项目(YCSZ2020018),项目负责人:李宝莹

Isolation and identification of fibroblast-like synoviocytes from tree shrews and establishment of TLR8 pathway related molecular detection methods

Zhou Fanqi1, 2, 3, Li Baoying1, 2, Wang Kaitao1, Tan Quanquan1, Yun Chenxia1, 2, Leng Jing1, 2   

  1. 1School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; 2Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; 3Laboratory of Liuzhou People’s Hospital, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China
  • Received:2021-07-14 Accepted:2021-08-13 Online:2022-08-18 Published:2022-02-23
  • Contact: Yun Chenxia, Professor, School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China Leng Jing, Professor, School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China
  • About author:Zhou Fanqi, Master, School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; Laboratory of Liuzhou People’s Hospital, Liuzhou 545000, Guangxi Zhuang Autonomous Region, China Li Baoying, Master, School of Basic Medicine, Guangxi University of Chinese Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Translational Medicine for Treating High-Incidence Infectious Diseases with Integrative Medicine, Nanning 530200, Guangxi Zhuang Autonomous Region, China Zhou Fanqi and Li Baoying contributed equally to this work.
  • Supported by:
    the National Natural Science Foundation of China (Regional Program), No. 31660632 (to YCX); Guangxi Natural Science Fund Project, No. 2016GXNSFAA380179 (to YCX); Master’s Graduate Student Innovation Project of Guangxi University of Chinese Medicine, No. YCSZ2020018 (to LBY)

摘要:

文题释义:
成纤维样滑膜细胞:是关节滑膜层的最大细胞群体,在维持关节正常生理功能和内环境稳态方面发挥重要作用。在类风湿关节炎病变过程中,炎症性关节炎的一个最明显特征是滑膜衬里层成纤维样滑膜细胞的大量增殖,它能降解细胞外基质并向间充质细胞和浸润免疫细胞提供趋化和活化信号。
TLR8信号通路:TLR8是Toll样受体家族中重要的一员,主要位于细胞的内涵体中,通过识别病毒的单链RNA,其信号通路被激活,通过核因子κB的活化引发炎症反应。TLR8的过度激活与自身免疫疾病的发生有着密切联系。

背景:成纤维样滑膜细胞在类风湿关节炎病变过程中发挥着重要的作用,当炎症性关节炎发生时滑膜衬里层成纤维样滑膜细胞会大量增殖,释放炎症因子能引起关节炎症和软骨的损伤。
目的:建立树鼩膝关节成纤维样滑膜细胞体外分离、培养纯化及鉴定的方法,并探讨其生物学特性;建立树鼩成纤维样滑膜细胞TLR8通路相关分子的检测方法,初探TLR8通路在细胞中的活化情况。
方法:利用组织块贴壁法和连续传代法分离、纯化树鼩成纤维样滑膜细胞,采用CCK-8法检测细胞增殖能力,苏木精-伊红染色观察细胞形态,免疫细胞化学染色法检测成纤维样滑膜细胞的标志性蛋白(波形蛋白)的表达。经人TLR8配体R848刺激前后,采用Western blot方法检测树鼩成纤维样滑膜细胞与人成纤维样滑膜细胞中TLR8及其信号通路蛋白的表达,采用RT-PCR和琼脂糖凝胶电泳检测树鼩成纤维样滑膜细胞中TLR8通路及其下游基因mRNA的表达。
结果与结论:①倒置显微镜下可见,经过3代的传代培养后,树鼩成纤维样滑膜细胞多为梭形,大小相近,纯度高,在体外生长增殖状况良好;苏木精-伊红染色显示细胞形态多呈梭形,大小相近;免疫细胞化学染色显示,成纤维样滑膜细胞胞浆波形蛋白表达阳性;CCK-8实验结果显示,树鼩成纤维样滑膜细胞生长曲线为“S”型;②Western blot检测显示,经R848刺激48 h后,树鼩成纤维样滑膜细胞中的核因子κB蛋白表达升高(P < 0.05),p-P38蛋白表达降低(P < 0.05),TLR8、MyD88、P38、p-Erk1/2、和RANKL蛋白表达无明显变化(P > 0.05);人成纤维样滑膜细胞中的p-P38蛋白表达降低(P < 0.05),TLR7、TLR8、MyD88、核因子kB、P38、p-Erk1/2和RANKL蛋白表达无明显变化(P > 0.05);③RT-PCR和琼脂糖凝胶电泳检测显示,经R848刺激48 h后,树鼩成纤维样滑膜细胞中肿瘤坏死因子ɑ、白细胞介素6、干扰素β、TLR9-2、TLR9-1、TLR8-2、TLR8-1、TLR7-2、TLR7-1 mRNA表达无明显变化(P > 0.05);④结果表明,采用组织贴壁法可分离树鼩成纤维样滑膜细胞,利用人来源抗体可建立树鼩成纤维样滑膜细胞TLR8通路相关分子检测方法。

https://orcid.org/0000-0002-7429-3155 (周凡琦) 

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: 树鼩, 类风湿关节炎, 组织贴壁法, 成纤维样滑膜细胞, 分离培养, 细胞鉴定, TLR8信号通路

Abstract: BACKGROUND: Fibroblast-like synoviocytes play an important role in the pathological process of rheumatoid arthritis. When inflammatory arthritis occurs, fibroblast-like synoviocytes in the synovial lining layer will proliferate in large quantities, and the release of inflammatory factors during this period can cause joint inflammation and cartilage damage. 
OBJECTIVE: To establish methods for isolation, culture, purification, and identification of tree shrew knee joint fibroblast-like synoviocytes in vitro, and explore their biological characteristics; to establish methods for detection of TLR8 pathway related molecules in fibroblast-like synoviocytes from tree shrews, and preliminarily explore the activation of TLR8 pathway in the cells. 
METHODS: Fibroblast-like synoviocytes from tree shrews were isolated and purified using tissue block method and continuous passage method. Cell proliferation was detected using cell counting kit-8. Cell morphology was observed using hematoxylin-eosin staining. Immunocytochemical staining was used to detect the expression of vimentin in synoviocytes. Before and after stimulation with human TLR8 ligand R848, the expression of TLR8 and its signaling pathway proteins in tree shrew fibroblast-like synoviocytes and human fibroblast-like synoviocytes was detected using western blot assay, while the expression of TLR8 pathway and its downstream mRNAs in tree shrew fibroblast-like synoviocytes were detected using RT-PCR.
RESULTS AND CONCLUSION: Under an inverted microscope, tree shrew fibroblast-like synoviocytes after 3 generations of subculture were mostly spindle-shaped cells with similar size, high purity, good growth and proliferation in vitro. Hematoxylin-eosin staining revealed that the cells were mostly spindle-shaped, similar in size. Immunocytochemical staining results showed that Vimentin positively expressed in fibroblast-like synoviocytes. Cell counting kit-8 testing results showed an “S”-shaped growth curve of tree shrew fibroblast-like synoviocytes. Western blot results revealed that at 48 hours after R848 stimulation, the expression level of nuclear factor-κB protein significantly increased (P < 0.05), the expression level of p-P38 protein decreased (P < 0.05), and there was no change in the expression of TLR8, MyD88, P38, p-Erk1/2, and RANKL proteins (in tree shrew fibroblast-like synoviocytes (P > 0.05). After R848 stimulation, the expression of p-P38 in human fibroblast-like synoviocytes also significantly decreased, and no changes were found in the expression of TLR8, MyD88, P38, p-Erk1/2, and RANKL proteins (P > 0.05). Findings from RT-PCR and agarose gel electrophoresis detection showed that the mRNA expression of tumor necrosis factor ɑ, interleukin 6, interferon β, TLR9-2, TLR9-1, TLR8-2, TLR8-1, TLR7-2, and TLR7-1 mRNA expression had no significant change after 48 hours of stimulation with R848 (P > 0.05). To conclude, the tissue block adherence method can be used to isolate tree shrew fibroblast-like synoviocytes, and TLR8 pathway-related molecular detection method for tree shrew fibroblast-like synoviocytes is successfully established. 

Key words: tree shrew, rheumatoid arthritis, tissue block adherence method, fibroblasts-like synoviocyte, isolation and culture, cell identification, TLR8 signaling pathway

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