中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (29): 4685-4690.doi: 10.3969/j.issn.2095-4344.2017.29.016

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

不同剂量脂肪干细胞移植对早期肾纤维化形成的影响

吕春燕1,李进辉1,刘伟伟2,陈昌金3,吴 程1,赵梓亦3,沈东成2   

  1. 1成都中医药大学附属医院/临床医学院病理科/病理教研室,四川省成都市  6100722成都中医药大学基础医学院,四川省成都市  6111373成都中医药大学附属医院/临床医学院中心实验室,四川省成都市 610072
  • 修回日期:2017-05-19 出版日期:2017-10-18 发布日期:2017-11-08
  • 作者简介:吕春燕,女,1978年生,四川省成都市人,汉族,成都中医药大学在读博士,副主任医师,主要从事中西医结合肾脏病理的研究。
  • 基金资助:

    四川省卫生厅项目(110520);成都市卫生局项目(2014004);成都中医药大学实验技术项目(071002)

Effect of different doses of adipose-derived stem cells on early renal fibrosis

Lv Chun-yan1, Li Jin-hui1, Liu Wei Wei2, Chen Chang-jin3, Wu Cheng1, Zhao Zi-yi3, Shen Dong-cheng2   

  1. 1Department of Pathology, 3Central Laboratory, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan Province, China; 2College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, Sichuan Province, China
  • Revised:2017-05-19 Online:2017-10-18 Published:2017-11-08
  • About author:Lv Chun-yan, Studying for doctorate, Associate chief physician, Department of Pathology, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan Province, China
  • Supported by:

    the Project of Sichuan Provincial Health Department, No. 110520; the Project of Chengdu Municipal Health Department, No. 2014004; Experimental Technology Project of Chengdu University of Traditional Chinese Medicine, No. 071002

摘要:

文章快速阅读:

文题释义:
肾纤维化的形成机制:
目前对肾纤维化的形成机制有多种看法,但研究得最多且最深入的看法认为转化生长因子β1及其介导的Smad和/或非Smad通道导致的肾小管上皮细胞-肌纤维母细胞表型转化,引起肌纤维母细胞增生,分泌产生纤维基质沉积于肾间质,导致肾纤维化的发生,而α-平滑肌肌动蛋白是表型转化的重要标记物。
脂肪干细胞移植治疗早期肾纤维化:有积极的治疗效果,其机制可能是通过抑制致纤维化形成相关因子(转化生长因子β1、α-平滑肌肌动蛋白等),减轻炎症反应、抑制胶原沉积,延缓肾纤维化的病理进程,拮抗肾纤维化的发生,且此疗效与移植细胞数量相关,3×1010 L-1为相对较好的剂量。

 

摘要
背景:
前期实验发现干细胞对于肾纤维化的早期形成具有一定的干预作用,能够延缓肾间质纤维化的发生。
目的:研究外源性脂肪干细胞移植对大鼠早期肾间质纤维化形成的影响,并探讨其量效关系。  
方法:将50只SD大鼠随机分为5组,假手术组尾静脉注射PBS;模型组、低剂量组、中剂量组、高剂量组结扎左侧输尿管,建立肾纤维化模型,造模成功后,模型组尾静脉注射PBS,低剂量组、中剂量组、高剂量组尾静脉分别注射细胞浓度为1×1010,2×1010,3×1010 L-1的脂肪干细胞悬液0.1 mL。注射后14 d取左肾组织,采用苏木精-伊红染色和Masson染色观察肾小管-间质损伤程度及肾间质相对面积,免疫组织化学法检测α-平滑肌肌动蛋白和转化生长因子β1表达。
结果与结论:①苏木精-伊红染色:模型组表现为典型的肾小球及肾小管-间质改变;低剂量组、中剂量组、高剂量组均有一定程度的肾小球及肾小管-间质改变,但程度较模型组明显减轻,以高剂量组损伤程度最轻;②Masson染色:模型组肾小管间质增宽,胶原纤维沉积;低剂量组、中剂量组、高剂量组肾间质增宽程度低于模型组,中、高剂量组肾间质增宽程度低于低剂量组(P < 0.05);③免疫组织化学染色:与假手术组比较,模型组α-平滑肌肌动蛋白、转化生长因子β1表达升高(P < 0.05);与模型组比较,高剂量组α-平滑肌肌动蛋白表达降低(P < 0.05),低、中、高剂量组转化生长因子β1表达均降低(P < 0.05),以中、高剂量组转化生长因子β1降低更明显;④结果表明:外源性脂肪干细胞移植可延缓早期肾纤维化的形成,并存在剂量-效应关系,其机制可能是通过改变转化生长因子β1诱导的信号通道状态实现的。

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ORCID: 0000-0003-0456-1019(吕春燕)

关键词: 干细胞, 脂肪干细胞, 早期肾纤维化, 剂量-效应关系, 转化生长因子β1, ;α-平滑肌肌动蛋白

Abstract:

BACKGROUND: Our preliminary findings have shown that stem cells have a certain effect on early formation of renal fibrosis and delay the occurrence of renal interstitial fibrosis.
OBJECTIVE: To investigate the effect of exogenous adipose-derived stem cell transplantation on the formation of renal interstitial fibrosis in rats, and to explore the dose-effect relationship. 
METHODS: Fifty Sprague-Dawley rats were randomly divided into five groups. Rats in sham operation group were injected with PBS; and those in the other four groups were ligated to establish the model of renal fibrosis. After successful modeling, the model group was injected with PBS, while low dose group, middle dose group and high dose group were injected with 1×107/L, 2×107/L, 3×107/L adipose-derived stem cell suspension (0.1 mL), respectively. Rats were killed 14 days after injection. Hematoxylin-eosin staining and Masson staining were used to observe the degree of renal tubular interstitial injury and the relative area of the renal interstitium. Expression of alpha smooth muscle actin and transforming growth factor beta1 was detected by immunohistochemistry. 
RESULTS AND CONCLUSION: (1) Hematoxylin eosin staining: The model group showed typical glomerular and tubulointerstitial changes; the low, middle and high dose groups had a certain degree of glomerular and tubulointerstitial changes, but the severity of injury in these three groups, especially in the high dose group, was significantly milder than that in the model group. (2) Masson staining: In the model group, the renal interstitium was widened and the collagen fibers were deposited; in the low, middle and high dose groups, the degree of renal interstitial expansion was lower than that in the model group, and moreover, the degree of renal interstitial expansion in the middle and high dose groups was lower than that in the low dose group (P < 0.05). (3) Immunohistochemical staining: Compared with the sham operation group, the expression of alpha smooth muscle actin and transforming growth factor beta1 in the model group was higher than that in the sham operation group (P < 0.05). Compared with the model group, significantly decreased expression of alpha smooth muscle actin was found in the high dose group (P < 0.05) and significantly reduced transforming growth factor beta1 expression was observed in the high, middle, and low dose groups (P < 0.05), especially in the middle and high dose groups. To conclude, exogenous adipose-derived stem cell transplantation can delay the formation of early renal fibrosis in a dose-effect manner, which may be realized by changing the signal pathway state induced by transforming growth factor beta1.

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

Key words: Stem Cells, Fibrosis, Transforming Growth Factor beta1, Tissue Engineering

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