中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (21): 3426-3431.doi: 10.3969/j.issn.2095-4344.1747

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

原花青素可抑制高糖诱导兔髓核细胞的凋亡

徐 庆1,房好林2,刘 阳3,张存鑫4,田宝方2   

  1. 济宁市第一人民医院,1麻醉手术部,2急诊创伤外科,4脊柱外科,山东省济宁市 272000;3诸城市人民医院关节外科,山东省诸城市 262200
  • 修回日期:2019-03-04 出版日期:2019-07-28 发布日期:2019-07-28
  • 通讯作者: 房好林,硕士,主治医师,济宁市第一人民医院急诊创伤外科,山东省济宁市 272000
  • 作者简介:徐庆,女,1987年生,山东省邹城市人,汉族,2013年山东大学毕业,护师,主要从事脊髓损伤护理的研究。
  • 基金资助:

    山东省保健科技协会科学技术课题(SDBJKT20180131),项目负责人:房好林

Proanthocyanidins inhibit high glucose-induced apoptosis in nucleus pulposus cells in a rabbit

Xu Qing1, Fang Haolin2, Liu Yang3, Zhang Cunxin4, Tian Baofang2   

  1. 1Department of Anesthesia, 2Department of Traumatology, 4Department of Spine Surgery, Jining No. 1 People’s Hospital, Jining 272000, Shandong Province, China; 3Department of Joint Surgery, Zhu Cheng People’s Hospital, Zhucheng 262200, Shandong Province, China
  • Revised:2019-03-04 Online:2019-07-28 Published:2019-07-28
  • Contact: Fang Haolin, Master, Attending physician, Department of Traumatology, Jining No. 1 People’s Hospital, Jining 272000, Shandong Province, China
  • About author:Xu Qing, Senior nurse, Department of Anesthesia, Jining No. 1 People’s Hospital, Jining 272000, Shandong Province, China
  • Supported by:

    the Scientific and Technical Project of Shandong Health Science and Technology Association, No. SDBJKT20180131 (to FHL)

摘要:

文章快速阅读:

文题释义:
原花青素(简称PC):
是一种有着特殊分子结构的生物类黄酮混合物,其低聚物——低聚原花青素(OPC)是目前国际上公认的清除人体内自由基有效的天然抗氧化剂。一般为红棕色粉末,气微、味涩,溶于水和大多有机溶剂。研究表明蓝莓叶提取物原花青素可阻止丙肝病毒复制,是一种有着特殊分子结构的生物类黄酮,能清除人体内自由基有效的天然抗氧化剂,具有很强的体内活性,一般为葡萄籽提取物或法国海岸松树皮提取物。
血红素氧合酶(heme oxygenase,HO):血红素氧合酶是血红素降解的限速酶,将血红素转变为胆绿素IX,CO和铁,胆绿素随即被还原为胆红素。已知血红素氧合酶有3种同工酶,HO-1、HO-2和HO-3。HO-2和HO-3呈组成型大量表达,它们可能作为正常细胞内的血红素结合而分别发挥其功能。HO-1属诱导型,广泛分布于哺乳动物多种组织细胞中。HO-1可由多种刺激因子诱导表达,如氧化应激、热休克、紫外线照射、缺血再灌注、重金属、细菌脂多糖、细胞因子和NO以及其底物血红素。血红素氧合酶具有抗氧化、抗炎、抗凋亡、信号传导和免疫调节以及抑制黏附分子表达活性等作用。HO-1对各种刺激因子强大的适应性反应,在阻止炎症过程和氧化性组织损伤中具有重要的作用。

 

摘要
背景:
原花青素因其高效的抗氧化活性成为目前国际上公认的人体活性氧自由基清除剂。
目的:探讨原花青素是否对高糖诱导髓核细胞凋亡具有显著抑制作用,并分析其具体分子机制。  
方法:健康2月龄新西兰大白兔,由山东康大生物科技有限公司提供,实验方案经山东省保健科技协会批准。体外培养兔髓核细胞,传至5代。取第3代髓核细胞(细胞浓度至1×108 L-1),分别接种在6个4孔培养板中,分别加入不同浓度原花青素(0,10,20,30,40,50,60 µmol/L),采用CCK-8试剂盒检测细胞的增殖活性,以确定合适的原花青素浓度。实验分为4组:①对照组:无高浓度葡萄糖和原花青素;②高糖组:培养液中含有100 mmol/L葡萄糖,无原花青素;③原花青素组:培养液中含有40 µmol/L原花青素,无高浓度葡萄糖;④高糖+原花青素组:40 µmol/L原花青素预处理6 h后再加入100 mmol/L高浓度葡萄糖。采用倒置显微镜观察髓核细胞形态、绘制细胞生长曲线;检测细胞凋亡率、细胞内总活性氧、血红素氧合酶的表达情况。
结果与结论:①兔髓核细胞呈多角形、短梭形,随着传代次数增加,细胞伸出伪足,胞体逐渐变细长;②细胞呈“S”型曲线生长。传代后第1天,细胞生长缓慢,从第2-5天细胞生长迅速,随着细胞传代次数的增加,细胞的生长活性逐渐降低;③通过筛选发现,原花青素浓度为40 µmol/L时为较适宜浓度;④流式细胞仪检测发现,高糖组髓核细胞凋亡率显著增加,原花青素预处理髓核细胞后,与高糖组比较,细胞凋亡率显著降低(P < 0.05);⑤Western blot检测显示,原花青素可显著增加血红素氧合酶1的表达,且血红素氧合酶1的表达量与细胞凋亡率、活性氧自由基积聚程度和细胞增殖活性趋势相反;⑤结果说明,原花青素可通过上调血红素氧合酶1的表达,抑制高糖诱导的髓核细胞凋亡增加、细胞内活性氧积聚和增殖活性下降。


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: 0000-0003-2908-5290(徐庆)

关键词: 组织构建, 软骨细胞, 髓核细胞, 细胞凋亡, 细胞增殖, 活性氧自由基, 椎间盘, 原花青素, 血红素氧合酶1, 葡萄糖

Abstract:

BACKGROUND: Proanthocyanidins are an internationally recognized active oxygen free radical scavenger in the human body due to their high antioxidant activity.
OBJECTIVE: To investigate whether proanthocyanidins has a significant inhibitory effect on high glucose-induced apoptosis in nucleus pulposus cells and to investigate its molecular mechanism.
METHODS: Healthy 2-month-old New Zealand white rabbits were provided by Shandong Kond Biotechnology Co., Ltd., and the study protocol was approved by Health Care Technology Association of Shandong Province, China. Nucleus pulposus cells were isolated, cultured and passaged to the 5 generation in vitro. Passage 3 nucleus pulposus cells at a concentration of 1×108/L were inoculated into six 4-well culture plates and cultured in proanthocyanidins at different concentrations (0, 10, 20, 30, 40, 50, 60 µmol/L). Cell proliferation was detected using cell counting kit-8, to determine the proper concentration of proanthocyanidins. Cells were divided into four groups and cultured normally, in the medium containing 100 mmol/L glucose, in the medium containing 40 µmol/L proanthocyanidins, and in the medium containing 40 µmol/L proanthocyanidins and 100 mmol/L glucose (combination group, in which 100 mmol/L glucose was added after 6-hour pretreatment with 40 µmol/L proanthocyanidins), respectively. The morphology of nucleus pulposus cells was observed by inverted microscope, and the cell growth curve was drawn. The apoptotic rate, intracellular reactive oxygen species and expression of heme oxygenase in the cells were detected.
RESULTS AND CONCLUSION: Nucleus pulposus cells from rats showed polygonal and short spindle shapes and cellular pseudopod appeared gradually and then became slim with increasing passage numbers. The cells grew in an “S”-shaped curve. The cells grew slowly on day 1 after passage, and grew rapidly from day 2 to day 5. As the number of passages increased, the cell viability gradually decreased. It was found that the proper concentration of proanthocyanidins was 40 μmol/L. Flow cytometry results showed that the apoptosis rate of nucleus pulposus cells in the high glucose group was significantly increased. Pretreatment with proanthocyanidins significantly decreased the apoptosis rate as compared to the high glucose group (P < 0.05). Results of western blot assay showed that proanthocyanidins significantly increased the expression of heme oxygenase-1, and moreover, the expression of heme oxygenase 1 was negatively correlated with the apoptotic rate, active oxygen free radical accumulation and cell proliferation activity. All the findings indicate that proanthocyanidins could inhibit the apoptosis of nucleus pulposus cells induced by high glucose, and decrease intracellular reactive oxygen species accumulation and proliferation activity by up-regulating the expression of heme oxygenase 1.

Key words: tissue construction, chondrocytes, nucleus pulposus cells, apoptosis, cell proliferation, reactive oxide species, intervertebral disc, proanthocyanidin, heme oxygenase-1, glucose

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