中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (10): 1373-1381.doi: 10.3969/j.issn.2095-4344.2016.10.001

• 脂肪干细胞 adipose-derived stem cells •    下一篇

脂肪间充质干细胞可调节变应性鼻炎T细胞的免疫状态

肖二彬,赵宝建,张 驰   

  1. 河北大学附属医院耳鼻喉科,河北省保定市 071000
  • 收稿日期:2016-01-16 出版日期:2016-03-04 发布日期:2016-03-04
  • 作者简介:肖二彬,男,1972年生,河北省定州市人,汉族,硕士,副主任医师,主要从事鼻科学研究。

Adipose-derived mesenchymal stem cells regulate T cell immune status in allergic rhinitis

Xiao Er-bin, Zhao Bao-jian, Zhang Chi   

  1. Department of Otorhinolaryngology, Affiliated Hospital of Hebei University, Baoding 071000, Hebei Province, China
  • Received:2016-01-16 Online:2016-03-04 Published:2016-03-04
  • About author:Xiao Er-bin, Master, Associate chief physician, Department of Otorhinolaryngology, Affiliated Hospital of Hebei University, Baoding 071000, Hebei Province, China

摘要:

文章快速阅读:

文题释义:

变应性鼻炎:又称为过敏性鼻炎,是指特异性个体接触变应原后,主要由IgE介导的介质(主要是组胺)释放,并有多种免疫活性细胞和细胞因子等参与的鼻黏膜非感染性炎性疾病。
T细胞:在人体胚胎期和初生期,骨髓中的一部分多能干细胞或前T细胞迁移到胸腺内,在胸腺激素的诱导下分化成熟,成为具有免疫活性的T细胞。成熟的T细胞经血流分布至外周免疫器官的胸腺依赖区定居,并可经淋巴管、外周血和组织液等进行再循环,发挥细胞免疫及免疫调节等功能。

 

背景:脂肪间充质干细胞是一种多能干细胞,具有自我更新和增殖潜能,并具有低免疫原性以及免疫调节优势。
目的:探讨脂肪间充质干细胞对小鼠变应性鼻炎T细胞免疫状态的影响。
方法:①将60只小鼠随机分为6组(分组表示为致敏/激发/处理):卵清蛋白/卵清蛋白/高剂量脂肪间充质干细胞组(简称高剂量脂肪间充质干细胞组)、卵清蛋白/卵清蛋白/低剂量脂肪间充质干细胞组(简称低剂量脂肪间充质干细胞组)、卵清蛋白/卵清蛋白/PBS组、卵清蛋白/卵清蛋白组/0组、PBS/PBS组/0组、正常对照组。前5组分别于第0,7,14天的相同时间腹腔注射200 μL卵清蛋白致敏液或PBS进行基础致敏,第15-19天每天给予20 μL卵清蛋白激发液或PBS进行激发,正常对照组不做任何处理。在致敏激发后的第20-22天,前3组分别经尾静脉注射0.1 mL的高、低浓度脂肪间充质干细胞液及PBS。②末次处理48 h后,采用ELISA法检测血清白细胞介素4、白细胞介素6、白细胞介素10和干扰素-γ水平,荧光定量PCR法检测脾脏上述各细胞因子mRNA的表达,荧光显微镜观察荧光标记脂肪间充质干细胞在鼻黏膜的迁移情况,苏木精-伊红染色观察鼻黏膜的病理学变化。

结果与结论:①高剂量脂肪间充质干细胞组与卵清蛋白/卵清蛋白组相比,血清和脾脏白细胞介素4和白细胞介素6水平显著下降(P < 0.05),白细胞介素10和干扰素-γ水平显著增加(P < 0. 05)。②低剂量脂肪间充质干细胞组与卵清蛋白/卵清蛋白组比较,血清和脾脏中白细胞介素6水平显著下降(P < 0.05),白细胞介素10水平显著增加(P < 0.05),白细胞介素4和干扰素-γ的水平无显著性变化(P > 0.05)。③荧光标记的脂肪间充质干细胞可向鼻黏膜迁移分布,高浓度脂肪间充质干细胞组明显多于低浓度脂肪间充质干细胞组。④高、低浓度脂肪间充质干细胞组鼻黏膜中嗜酸性粒细胞浸润明显减轻。⑤脂肪间充质干细胞通过调节Th1/Th2细胞免疫失衡和Treg细胞缺陷发挥非特异性免疫调节作用,这种调节作用存在一定的剂量依赖性。 

ORCID: 0000-0003-0978-9952 (肖二彬)

关键词: 干细胞, 脂肪干细胞, 变应性鼻炎, 脂肪间充质干细胞, 调节性T细胞, Th1/Th2免疫平衡

Abstract:

BACKGROUND: Adipose-derived mesenchymal stem cells are a kind of pluripotent stem cells that have the potential of self-renewal and proliferation, and have low immunogenicity and immunomodulatory role.
OBJECTIVE: To study the effects of adipose-derived mesenchymal stem cells on T cell immune status of allergic rhinitis mouse models.
METHODS: Sixty mice were randomly assigned into six groups (sensitized/challenged/treatment): experimental group 1 was given ovalbumin/ovalbumin/high-dose adipose-derived mesenchymal stem cells, experimental group 2 given ovalbumin/ovalbumin/low-dose adipose-derived mesenchymal stem cells, experimental group 3 given ovalbumin/ovalbumin/PBS, experimental group 4 given ovalbumin/ovalbumin/0, and experimental group 5 given PBS/PBS/0, and normal control group given no treatment. In the former five groups, intraperitoneal injection of 200 μL ovalbumin sensitizing solution or PBS was conducted for basic sensitization at days 0, 7, 14; 20 μL ovalbumin challenging solution or PBS was given for challenging at days 15-19. In the former three groups, 0.1 mL of high-dose, low-dose adipose-derived mesenchymal stem cells or PBS was given via the tail vein, respectively, at days 20-22 after sensitization and challenge. At 48 hours after final treatment, ELISA was used to detect serum levels of interleukin-4, interleukin-6, interleukin-10 and interferon-γ, and fluorogenic quantitative PCR used to detect the mRNA expressions of these cytokines in the spleen. Migration of fluorescent-labeled adipose-derived mesenchymal stem cells in the nasal mucosa was observed under fluorescence microscope, and pathological changes of the nasal mucosa were observed through hematoxylin-eosin staining.
RESULTS AND CONCLUSION: Compared with the experimental group 4, the levels of interleukin-4 and interleukin-6 in the serum and spleen were significantly lower in the experimental group 1 (P < 0.05), and the levels of interluekin-10 and interferon-γ levels were significantly increased (P <0.05); while in the experimental group, the levels of interleukin-6 were reduced significantly (P < 0.05), the levels of interleukin-10 was increased significantly (P < 0.05), but no changes were found in the levels of interleukin-4 and interferon-γ (P > 0.05). Fluorescent-labeled adipose-derived mesenchymal stem cells could migrate into the nasal mucosa, and the number of migrated cells was notably higher in the experimental group 1 than experimental group 2. Eosinophil infiltration in the nasal mucosa was remarkably alleviated in the experimental groups 1 and 2. These findings suggest that adipose-derived mesenchymal stem cells play a non-specific immunomodulatory effect dose-dependently by regulating Th1/Th2 immune imbalances and deficiencies of Treg cells.