中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (8): 1213-1217.doi: 10.3969/j.issn.2095-4344.1872

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机械法与机械-酶消化法制备大鼠膈肌组织单细胞悬液的比较

张远圆1,张杉杉1,常  旭2,赵朋伟1,余孝先1,吴学东1   

  1. 1大理大学第一附属医院暨临床医学研究中心小儿外科,云南省大理市  671000;2大理大学基础医学院,云南省大理市  671000
  • 收稿日期:2019-04-24 修回日期:2019-04-30 接受日期:2019-06-22 出版日期:2020-03-18 发布日期:2020-01-22
  • 通讯作者: 吴学东,博士,教授,大理大学第一附属医院暨临床医学研究中心小儿外科,云南省大理市 671000
  • 作者简介:张远圆,女,1990年生,河南省安阳市滑县人,汉族,2017年大理大学小儿外科专业毕业,硕士,医师,主要从事小儿普通外科学研究,现在新乡医学院第一附属医院小儿外科工作。
  • 基金资助:
    国家自然科学基金(81260018)

Preparing single cell suspension of rat diaphragm tissues: mechanical grinding versus mechanical-enzymatic digestion   

Zhang Yuanyuan1, Zhang Shanshan1, Chang Xu2, Zhao Pengwei1, Yu Xiaoxian1, Wu Xuedong1   

  1. 1Department of Pediatric Surgery, the First Affiliated Hospital & Clinical Medical Research Center of Dali University, Dali 671000, Yunnan Province, China; 2School of Basic Medicine, Dali University, Dali 671000, Yunnan Province, China
  • Received:2019-04-24 Revised:2019-04-30 Accepted:2019-06-22 Online:2020-03-18 Published:2020-01-22
  • Contact: Wu Xuedong, MD, Professor, Department of Pediatric Surgery, the First Affiliated Hospital & Clinical Medical Research Center of Dali University, Dali 671000, Yunnan Province, China
  • About author:Zhang Yuanyuan, Master, Physician, Department of Pediatric Surgery, the First Affiliated Hospital & Clinical Medical Research Center of Dali University, Dali 671000, Yunnan Province, China
  • Supported by:
     the National Natural Science Foundation of China, No. 81260018

摘要:

文题释义:
流式细胞分析技术:简称流式细胞术,是20世纪70年代初发展起来的一种在功能水平上可以对单个细胞或其他生物离子进行快速定量的一项新型分析技术和分选技术。它能够在短时间内高速分析上万个细胞,可以同时测量如细胞或粒子的体积、内部结构以及膜电位变化等生物或化学性质,进行多信息分析,具有快速、高灵敏、准确、多参数等特点。
单细胞悬液:是进行细胞体外培养和流式细胞分析的基础,即将组织分散成单个游离细胞,使其悬浮在液体培养基中,当然如外周血及骨髓标本等本身即为天然的单细胞悬液,这些细胞经过简单处理,就可以应用于流式分析、细胞分选、细胞培养等实验。如果2个或多个细胞粘连在一起或细胞碎片过多都将影响流式分析结果,进而导致实验失败。

背景:流式细胞术作为目前先进的细胞分析技术,其研究基础是单细胞悬液,但目前尚无有关膈肌组织单细胞悬液制备方法的相关报道。

目的:探索应用机械法与机械-酶消化法分别制备大鼠膈肌单细胞悬液的可行性并比较2种方法获得单细胞的数量和活性。

方法:以SD大鼠的新鲜膈肌组织为标本,在机械法的基础上,选用胰蛋白酶、胶原酶Ⅰ、胶原酶Ⅱ、胶原酶Ⅳ及其不同组合进行消化制备膈肌单细胞悬液,观察细胞形态并经锥虫蓝染色后测定细胞活性,对活细胞、失活细胞和细胞团块进行计数并计算出细胞存活率和单细胞悬液浓度,结果进行统计学比较分析。

结果与结论:①机械-酶消化法所制得的单细胞悬液较机械研磨法细胞分散度好、形态完整、边界清楚、杂质及细胞碎片较少、背景较干净;②单纯机械研磨法制备的单细胞悬液活细胞数较低,失活细胞数较高,细胞存活率最低,团块较多;③在机械法的基础上,加入胰蛋白酶、胶原酶Ⅰ和胶原酶Ⅳ3种等体积混合酶所得单细胞悬液的活细胞数及悬液浓度最高,每0.1 g膈肌组织可获得(1.0-2.0)×106个细胞,细胞存活率较高,与单纯机械法获得单细胞悬液比较,在活细胞、失活细胞、细胞团块、细胞存活率及悬液浓度方面差异均有显著性意义(P < 0.05);其次是加入胰蛋白酶和胶原酶Ⅳ这2种等体积混合酶消化法,所得单细胞悬液浓度、细胞成活率及细胞团块方面也均较为理想;④结果表明,机械法和机械-酶消化法均能成功制备出大鼠膈肌单细胞悬液,机械-酶消化法优于单纯机械法,其中加入胰蛋白酶、胶原酶Ⅰ和胶原酶Ⅳ3种等体积混合酶的机械-酶消化法所得单细胞悬液效果最佳,是较优选的膈肌单细胞悬液制作方法。

ORCID: 0000-0002-4486-5917(张远圆)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

关键词: 单细胞悬液, 膈肌组织, 机械法, 机械-酶消化法, 流式细胞术, 大鼠

Abstract:

BACKGROUND: Flow cytometry is currently the advanced cell analysis technique with single cell suspension as a research basis, but there is no report on the preparation method of single cell suspension of diaphragm tissue.

OBJECTIVE: To explore the feasibility of preparing single cell suspension of rat diaphragm tissue by mechanical grinding method and mechanical-enzymatic digestion method and to compare cell number and viability of the cells obtained using different methods. 

METHODS: The fresh diaphragm tissues of Sprague-Dawley rats were harvested. Based on the mechanical method, trypsin, collagenase I, collagenase II, collagenase IV and their different combinations were used to digest and prepare the single cell suspension of diaphragm tissues. Cell morphology was observed; cell number and viability were determined by trypan blue staining. The living cells, inactivated cells, and cell aggregates were counted, and cell survival rate and concentration of the single cell suspension were calculated. Statistical analyses were performed thereafter.

RESULTS AND CONCLUSION: (1) The single cell suspension with better cell dispersion, more complete morphology, clearer boundary, fewer impurities and cell debris, and cleaner background were obtained by mechanical-enzymatic digestion compared with mechanical grinding method. (2) The single cell suspension prepared by simple mechanical grinding method has low number of living cells, high number of inactivated cells, low survival rate and many cell aggregates. (3) The number of living cells and concentration of single cell suspension obtained by same-volume addition of trypsin, collagenase I and collagenase IV mixed enzymes based on the mechanical grinding method were the highest, with (1.0-2.0)×106 cells per 0.1 g diaphragm tissue. There were significant differences between mechanical-enzymatic digestion and mechanical grinding method in terms of living cells, inactivated cells, cell aggregates, cell survival rate and suspension concentration (P < 0.05). Moreover, the single cell suspension prepared by the same-volume addition of trypsin and collagenase IV had higher suspension concentration, higher cell survival rate, and less inactivated cells and cell aggregates. To conclude, the single cell suspension of diaphragm tissues could be prepared successful by both mechanical and mechanical-enzyme digestion methods. Mechanical-enzyme digestion is superior to simple mechanical grinding method, with the best single cell suspension after same-volume addition of trypsin, collagenase I and collagenase IV. This is the preferred method for preparation of single cell suspension of the diaphragm tissue. 

Key words: single cell suspension, diaphragm tissue, mechanical method, mechanical-enzyme digestion, flow cytometry, rat

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