中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (45): 7268-7273.doi: 10.3969/j.issn.2095-4344.2015.45.010

• 脐带脐血干细胞 umbilical cord blood stem cells • 上一篇    下一篇

氯化钴模拟低氧环境下人脐带间充质干细胞增殖及基因蛋白的表达

韩 潇1,2,白 海1,尹娇娇1,杨 柯1,韩燕霞1,欧剑锋1,王存邦1   

  1. 1解放军兰州军区兰州总医院血液科/全军血液病中心,甘肃省兰州市  730050;2兰州大学第二医院血液内科,甘肃省兰州市  730030
  • 收稿日期:2015-09-29 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: 白海,博士,主任医师,硕士生导师,解放军兰州军区兰州总医院血液科,甘肃省兰州市 750050
  • 作者简介:韩潇,女,1990年生,四川省苍溪县人,汉族,兰州大学在读硕士,主要从事血液病及间充质干细胞的研究。
  • 基金资助:

    甘肃省科技重大专项(1102FKDA005)

Effect of cobalt chloride-induced hypoxia on proliferation of human umbilical cord-derived mesenchymal stem cells and related gene and protein expressions

Han Xiao1, 2, Bai Hai1, Yin Jiao-jiao1, Yang Ke1, Han Yan-xia1, Ou Jian-feng1, Wang Cun-bang1   

  1. 1Department of Hematology, Center for Hematologic Diseases of Chinese PLA/Lanzhou Military Area General Hospital, Lanzhou 730050, Gansu Province, China; 2Department of Hematology, Second Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
  • Received:2015-09-29 Online:2015-11-05 Published:2015-11-05
  • Contact: Bai Hai, M.D., Chief physician, Master’s supervisor, Department of Hematology, Center for Hematologic Diseases of Chinese PLA/Lanzhou Military Area General Hospital, Lanzhou 730050, Gansu Province, China
  • About author:Han Xiao, Studying for master’s degree, Department of Hematology, Center for Hematologic Diseases of Chinese PLA/Lanzhou Military Area General Hospital, Lanzhou 730050, Gansu Province, China; Department of Hematology, Second Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
  • Supported by:

    the Major Scientific Project of Gansu Province, No. 1102FKDA005

摘要:

背景:氯化钴可促进人脐带源性间充质干细胞的增殖,具有时间和浓度依赖性,并对其基因蛋白表达具有调控作用。
目的:研究氯化钴模拟的低氧环境对人脐带源性间充质干细胞的增殖及基因蛋白表达的影响,旨在建立高效的间充质干细胞体外培养扩增体系。
方法:采用组织块法提取人脐带间充质干细胞,氯化钴模拟化学低氧环境,在不同浓度(0,100,150,200,250 μmol/L)和不同时间(0,1,2,3,4 d)条件下,用流式细胞仪进行细胞表面相关抗原的鉴定及细胞周期检测;CCK-8法测定细胞增殖情况;RT-PCR测定缺氧诱导因子1α、诱导型一氧化氮合酶、基质细胞衍生因子1、白细胞介素6、转化生长因子β mRNA的表达;Western blot测定缺氧诱导因子1α蛋白的表达。
结果与结论:人脐带间充质干细胞表面相关抗原CD29、CD73、CD90、CD105表达阳性,CD31、CD14、CD34、CD45、CD11b、HLA-DR呈阴性表达,且不受氯化钴模拟的低氧环境影响。氯化钴模拟的化学性低氧可促进人脐带间充质干细胞增殖,且具有一定时间及浓度依赖性。RT-PCR检测到低氧组缺氧诱导因子1α、诱导型一氧化氮合酶、基质细胞衍生因子1 mRNA表达上调,而白细胞介素6及转化生长因子β mRNA表达下调,差异有显著性意义(P < 0.05)。低氧组中缺氧诱导因子1α蛋白表达增高。结果表明氯化钴模拟的体外低氧环境能促进人脐带间充质干细胞增殖,最佳浓度为200 μmol/L,但过高浓度(250 μmol/L)时反而抑制其增殖,机制可能与缺氧诱导因子1α基因与蛋白表达增加相关。
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: 干细胞, 脐带脐血干细胞, 人脐带间充质干细胞, 低氧, 氯化钴, 增殖, 基因表达, 缺氧诱导因子1α

Abstract:

BACKGROUND: Cobalt chloride (CoCl2) may promote the proliferation of human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) in a time- and concentration-dependent manner, and meanwhile, CoCl2 can regulate the expression of genes and proteins in hUC-MSCs.
OBJECTIVE: To explore the effects of CoCl2 induced-hypoxia on the proliferation of hUC-MSCs and gene and protein expressions in hUC-MSCs, thereby establishing an effective method for MSCs culture and amplification in vitro.
METHODS: hUC-MSCs were extracted using tissue explant method. Under hypoxia conditions induced by CoCl2 (0, 100, 150, 200, 250 μmol/L) for different periods (0, 1, 2, 3, 4 days), flow cytometry was used to identify cell surface-associated antigens; cell counting kit-8 was used to detect cell proliferation; RT-PCR was used to 
determine levels of hypoxia inducible factor-1α, inducible nitric oxide synthase, stromal cell-derived factor-1, interleukin-6, transforming growth factor-β mRNA; western blot assay was used to detect protein expression of hypoxia inducible factor-1α.
RESULTS AND CONCLUSION: The cells were positive for CD29, CD73, CD90, CD105, while negative for CD31, CD14, CD34, CD45, CD11b, HLA-DR. Moreover, the antigen expression was not affected by CoCl2 induced-hypoxia. CoCl2 induced-chemical hypoxia could promote the proliferation of hUC-MSCs in a time- and concentration-dependent manner. RT-PCR results showed that under hypoxia, hypoxia inducible factor 1α, inducible nitric oxide synthase and stromal cell-derived factor-1 mRNA expressions were significantly up-regulated, but interleukin-6 and transforming growth factor-β mRNA expressions were down-regulated significantly (P < 0.05). Additionally, the protein expression of hypoxia inducible factor 1α was increased under hypoxia conditions. These findings indicate that CoCl2 induced-hypoxia environment may promote the proliferation of hUC-MSCs and the optimal concentration of CoCl2 is 200 μmol/L. However, a higher concentration of CoCl2 (≥ 250 μmol/L) inhibits the proliferation of hUC-MSCs, and the mechanism may be related to the increase of hypoxia inducible factor-1α at protein and mRNA levels.
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: Umbilical Cord, Mesenchymal Stem Cells, Cell Hypoxia, Cell Proliferation, Hypoxia-Inducible Factor 1, Tissue Engineering