中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (33): 5357-5362.doi: 10.12307/2023.740

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

单细胞转录组测序溃疡性结肠炎脾虚湿蕴证患者的免疫细胞分子特征

张诗静1,黄卓健1,陶屈源1,侯江涛2,彭  彬3,罗泳欣1,李燕舞4,李辉标2,钟嘉敏1,陈新林1   

  1. 1广州中医药大学基础医学院,广东省广州市   510006;2广州中医药大学第一附属医院,广东省广州市   510400;3广州中医药大学第一临床医学院,广东省广州市   510400;4广州中医药大学科技创新中心,脾胃研究所,广东省广州市   510400
  • 收稿日期:2022-10-10 接受日期:2022-11-25 出版日期:2023-11-28 发布日期:2023-03-30
  • 通讯作者: 陈新林,教授,博士生导师,广州中医药大学基础医学院,广东省广州市 510006
  • 作者简介:张诗静,女,1992年生,广东省茂名市人,汉族,2022年广州中医药大学毕业,硕士,主要从事中医大数据统计分析研究。
  • 基金资助:
    国家自然科学基金面上项目(81774451),项目负责人:陈新林

Molecular characteristic of immune cells in ulcerative colitis patients with spleen deficiency and dampness syndrome based on single-cell RNA sequencing

Zhang Shijing1, Huang Zhuojian1, Tao Quyuan1, Hou Jiangtao2, Peng Bin3, Luo Yongxin1, Li Yanwu4, Li Huibiao2, Zhong Jiamin1, Chen Xinlin1   

  1. 1School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China; 2First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510400, Guangdong Province, China; 3First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510400, Guangdong Province, China; 4Science and Technology Innovation Center, Pi-Wei Institute, Guangzhou University of Chinese Medicine, Guangzhou 510400, Guangdong Province, China
  • Received:2022-10-10 Accepted:2022-11-25 Online:2023-11-28 Published:2023-03-30
  • Contact: Chen Xinlin, Professor, Doctoral supervisor, School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • About author:Zhang Shijing, Master, School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 81774451 (to CXL)

摘要:


文题释义:

单细胞转录组测序:是在单个细胞水平对mRNA进行高通量测序的一项新技术,原理是将分离的单个细胞中微量的mRNA通过扩增后再进行高通量测序,能够揭示单个细胞的基因结构和基因表达状态,反映细胞间的异质性,被广泛应用于生物和医学的各种领域,极大促进了相关研究和应用。
分子特征:是基于细胞的生物大分子水平所表现出的特征,可以依靠单细胞转录组测序,根据相应的特异性基因表达量对单种细胞进行分类,分出不同类型的亚群。

背景:免疫细胞介导的组织破坏对溃疡性结肠炎的发生和发展至关重要,但其机制尚未阐明,同时溃疡性结肠炎脾虚湿蕴证患者缺乏客观的生物标志物。
目的:基于单细胞转录组测序技术探讨溃疡性结肠炎脾虚湿蕴证患者的免疫细胞分子特征,寻找溃疡性结肠炎脾虚湿蕴证患者的生物标志物,为其临床诊断及治疗提供参考依据。
方法:临床获取2例溃疡性结肠炎患者和2例健康对照者的结肠活检组织,建库后进行单细胞转录组测序,并对单细胞转录组测序数据进行聚类和降维分析、细胞类型注释、差异表达分析和细胞通讯分析等。

结果与结论:①单细胞转录组测序数据聚类鉴定出29个细胞亚群,组成9种细胞类型;②对比健康对照组,溃疡性结肠炎组CD4+细胞毒性T细胞、初始 CD8+T细胞、生发中心、S100AhighB细胞、活化B细胞、NK_C2细胞和单核细胞的表达增高(P < 0.05);溃疡性结肠炎患者的Tfh细胞、NKT细胞和NK细胞的表达减少(P < 0.05);③差异表达基因的功能富集显示,溃疡性结肠炎患者的免疫调控增加,NK细胞、浆细胞和Th17细胞存在代谢重编程;④细胞通讯分析共鉴定了14种细胞之间的相互作用,以单核细胞和内皮细胞为主;⑤两组人群的免疫细胞分子特征存在较大差异,这些细胞亚群可能与溃疡性结肠炎的发生和发展有关,可能是溃疡性结肠炎脾虚湿蕴证患者的生物标志。

https://orcid.org/0000-0002-2650-8051 (陈新林) 

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: 溃疡性结肠炎, 单细胞转录组测序, 免疫细胞, 脾虚湿蕴, 分子特征, 生物标记

Abstract: BACKGROUND: Immune-mediated tissue destruction is essential for the development and deterioration of inflammation in ulcerative colitis, but their roles remain unclear. Simultaneously, ulcerative colitis patients with spleen deficiency and dampness syndrome lack objective biomarkers.  
OBJECTIVE: To investigate the molecular characteristics of immune cells in ulcerative colitis patients with spleen deficiency and dampness based on single-cell RNA sequencing so as to provide a basis for its clinical diagnosis and treatment.
METHODS: Colon tissues of two ulcerative colitis patients and two healthy controls were obtained. Single-cell RNA sequencing was performed. The following analyses were carried out for the single-cell RNA sequencing data: cluster analysis, dimensionality reduction analysis, cell type annotation, differential expression analysis and cell communication analysis.  
RESULTS AND CONCLUSION: (1) A total of 29 cell sub-types were identified according to clustering analysis in single cell transcriptome, which consisted of 9 cell types. (2) Compared with healthy controls, the ulcerative colitis patients with spleen deficiency and dampness syndrome had higher expression levels of CD4+ cytotoxic T cells, naive CD8+ T cells, germinal center, activated B cells, S100Ahigh B cells, NK_C2 cells and monocytes (P < 0.05). Compared with healthy controls, Tfh cells, NKT cells and NK cells decreased in patients with ulcerative colitis (P < 0.05). (3) Functional enrichment of differentially expressed genes showed that there were hyperinflammatory activation in immune cells and higher metabolic reprogramming of NK cells, plasma cells and helper T cells for ulcerative colitis patients. (4) Cell communication analysis identified 14 interactions among different cell types, mainly from monocytes and endothelial cells. (5) There are significant differences in molecular characteristics of immune cells between ulcerative colitis patients and healthy controls. These cell subsets may be related to the occurrence and development of ulcerative colitis, which may be a biomarker for ulcerative colitis patients with spleen deficiency and dampness syndrome.

Key words: ulcerative colitis, single-cell RNA sequencing, immune cell, spleen deficiency and dampness syndrome, molecular characteristic, biomarker

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