中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (1): 13-19.doi: 10.3969/j.issn.2095-4344.2016.01.003

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

强直性脊柱炎患者骨髓间充质干细胞调控巨噬细胞的功能异常

孙素和1,王 鹏1,苏春燕2,谢中瑜1,李玉希1,李 登1,旺 姗2,苏鸿君2,伍小华2,邓 雯2,吴燕峰2,沈慧勇1   

  1. 中山大学孙逸仙纪念医院,1骨外科,2生物治疗中心,广东省广州市 510120
  • 收稿日期:2015-11-15 出版日期:2016-01-01 发布日期:2016-01-01
  • 通讯作者: 沈慧勇,博士,博士生导师,主任医师,中山大学孙逸仙纪念医院骨外科,广东省广州市 510120
  • 作者简介:孙素和,男,1985 年生,湖南省娄底市人,汉族,中山大学孙逸仙纪念医院骨外科在读硕士,主要从事干细胞组织工程基础及临床研究。
  • 基金资助:
    国家自然科学基金资助项目(81271951,81401850)

Bone marrow mesenchymal stem cells derived from patients with ankylosing spondylitis show abnormal immunoregulation capability on macrophages

Sun Su-he1, Wang Peng1, Su Chun-yan2, Xie Zhong-yu1, Li Yu-xi1, Li Deng1, Wang Shan2, Su Hong-jun2, Wu Xiao-hua2, Deng Wen2, Wu Yan-feng2, Shen Hui-yong1   

  1. 1Department of Orthopedics, 2Center for Biotherapy, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Received:2015-11-15 Online:2016-01-01 Published:2016-01-01
  • Contact: Shen hui-yong, M.D., Doctoral supervisor, Chief physician, Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • About author:Sun Su-he, Studying for master’s degree, Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81271951, 81401850

摘要:

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文题释义:

骨髓间充质干细胞免疫调节能力:骨髓间充质干细胞具有极低的免疫原性及较强的免疫调节能力,可被用于治疗多种自身免疫性疾,如Crohn’s病、系统性红斑狼疮、多发性肌炎、风湿性关节炎等。强直性脊柱炎是一类自身免疫性疾病,其发病可能与HLA-B27、白细胞介素1α、白细胞介素23受体、肿瘤坏死因子α受体等基因多态性有关。课题组首次证实静脉输注异体正常人骨髓间充质干细胞可以有效改善强直性脊柱炎患者的炎性状态,或可能为强直性脊柱炎提供新的治疗策略。
TSG-6:是一个具有保护性的炎性调控因子,在炎性疾病中,多种促炎性因子如肿瘤坏死因子α,白细胞介素1等均可以促使其在间充质干细胞、成纤维细胞、滑膜细胞等多种细胞中表达。TSG-6可以反馈性抑制炎性细胞的迁移、黏附并降低其促炎性因子的分泌,从而起到局限炎症的作用。

 

 背景:强直性脊柱炎是一种伴有高炎性状态的自身免疫性疾病,但其具体发病机制不明确,目前尚缺乏有效的治疗方案。

目的:体外探讨强直性脊柱炎患者来源骨髓间充质干细胞调控巨噬细胞的功能及正常人骨髓间充质干细胞在强直性脊柱炎治疗中的潜在作用。
方法:提取25例强直性脊柱炎患者及21例健康志愿者的骨髓间充质干细胞进行体外培养扩增,以第4代细胞进行实验。体外诱导THP-1细胞系分化成为巨噬细胞。运用流式细胞术鉴定骨髓间充质干细胞及巨噬细胞的表面标志。ELISA检测健康志愿者/强直性脊柱炎患者骨髓间充质干细胞与巨噬细胞共培养体系上清中肿瘤坏死因子α及TSG-6蛋白水平,PCR检测巨噬细胞及骨髓间充质干细胞相关因子基因表达水平。
结果与结论:①两种骨髓间充质干细胞均呈现典型间充质干细胞表型,巨噬细胞表型标志CD68为阳性。②强直性脊柱炎患者骨髓间充质干细胞与巨噬细胞共培养组中巨噬细胞分泌的肿瘤坏死因子α蛋白水平及肿瘤坏死因子α转录水平均高于健康志愿者骨髓间充质干细胞(P < 0.05)。③强直性脊柱炎患者骨髓间充质干细胞组TSG-6基因的转录水平及蛋白分泌水平均低于健康志愿者骨髓间充质干细胞组(P < 0.05)。结果提示:①强直性脊柱炎患者骨髓间充质干细胞抑制巨噬细胞肿瘤坏死因子α分泌的功能减弱,可能是导致强直性脊柱炎免疫异常的重要原因。②正常人骨髓间充质干细胞可分泌足量的TSG-6抑制强直性脊柱炎患者巨噬细胞的活化,降低其肿瘤坏死因子α的分泌而发挥治疗作用。 

关键词: 干细胞, 骨髓干细胞, 强直性脊柱炎, 骨髓间充质干细胞, 巨噬细胞, TSG-6, 肿瘤坏死因子α, 国家自然科学基金

Abstract:

 BACKGROUND: Ankylosing spondylitis is an autoimmune disease at high inflammatory state, and its pathogenesis is still unclear. Besides, there is a lack of entirely satisfactory curative strategies.

OBJECTIVE: To explore the immunoregulation capability of bone marrow mesenchymal stem cells from ankylosing spondylitis patients on macrophages and the potential therapeutic use of bone marrow mesenchymal stem cells from healthy donors on ankylosing spondylitis.
METHODS: Bone marrow mesenchymal stem cells were extracted from 21 healthy donors and 25 ankylosing spondylitis patients respectively, and passage 4 cells were used in subsequent experiments. A human monocytic cell line was induced to differentiate into macrophages. The phenotypic markers of bone marrow mesenchymal stem cells and macrophages were detected by flow cytometry. Expressions of tumor necrosis factor-α and tumor necrosis factor-α-stimulated gene 6 (TSG-6) proteins in the supernatant of co-culture system were detected by ELISA. Quantitative real-time PCR was applied to detect the mRNA level of cytokines secreted by bone marrow mesenchymal stem cells and macrophages.
RESULTS AND CONCLUSION: The typical mesenchymal stem cell surface markers were expressed in both bone marrow mesenchymal stem cells from healthy donors and patients with ankylosing spondylitis, and CD68 was detected positively in induced macrophages. The protein and mRNA levels of tumor necrosis factor-α secreted by macrophages co-cultured with bone marrow mesenchymal stem cells from patients with ankylosing spondylitis were obviously higher than those from healthy donors (P < 0.05). TSG-6 secreted by bone marrow mesenchymal stem cells from patients with ankylosing spondylitis was lower than that by bone marrow mesenchymal stem cells from healthy donors in both RNA transcriptional and protein levels (P < 0.05). Our study demonstrates that bone marrow mesenchymal stem cells from patients with ankylosing spondylitis shows abnormal immunoregulatory function on inhibiting the tumor necrosis factor-α secretion from macrophages, which reveals a mechanism of immune disorder in ankylosing spondylitis. The therapeutic mechanism of bone marrow mesenchymal stem cells from healthy donors may work by secreting enough TSG-6 to inhibit the activation of macrophages in patients with ankylosing spondylitis, and thereby to decrease the secretion of tumor necrosis factor-α. 

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