中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (17): 2728-2733.doi: 10.3969/j.issn.2095-4344.1679

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

低强度脉冲超声对高糖诱导人脐静脉内皮细胞损伤的保护作用

叶 奎   

  1. 天津市第四中心医院血管外科,天津市 300140
  • 修回日期:2018-12-28 出版日期:2019-06-18 发布日期:2019-06-18
  • 作者简介:叶奎,男,河北省唐山市人,汉族,2010年中国医科大学毕业,硕士,主治医师,主要从事髂静脉受压、下肢血栓、下肢动脉硬化闭塞、动脉瘤、静脉曲张方面的研究。

Low-intensity pulsed ultrasound protects against high glucose-induced injury to human umbilical vein endothelial cells

Ye Kui   

  1. Department of Vascular Surgery, Tianjin 4th Center Hospital, Tianjin 300140, China
  • Revised:2018-12-28 Online:2019-06-18 Published:2019-06-18
  • About author:Ye Kui, Master, Attending physician, Department of Vascular Surgery, Tianjin 4th Center Hospital, Tianjin 300140, China

摘要:

文章快速阅读:

文题释义:
血管内皮细胞:
是介于血流和血管壁组织之间的一层单核细胞,可通过自分泌、内分泌、旁分泌3种途径分泌一系列血管活性物质发挥调节血管紧张性、抗血栓形成、抑制平滑肌细胞增殖及血管壁炎症反应等功能。然而血管内皮在受到一系列有害因素作用时,内皮细胞释放的舒血管因子减少,缩血管因子增多,打破血管平衡稳态,最终导致一系列心血管事件的发生。
超声脉冲反射法的优点:①灵敏度高,当反射声压为起始声压的1%时即能检测出,可发现较小的缺陷;②缺陷定位精度较高。通常仪器的水平线性误差小于2%,该类仪器定位精度较高,对不同声程上相邻缺陷的分辨力也较高;③适用范围广。改变耦台、探头和波型可实现不同方法的检测;④能确定缺陷的当量大小。

 

摘要
背景:
研究表明,人脐静脉内皮细胞参与多种原因引起的血管结构紊乱和功能障碍,有可能成为相关疾病治疗的新靶点。
目的:探讨低强度脉冲超声对高糖环境诱导的人脐静脉内皮细胞损伤的保护作用及机制。  
方法:将人脐静脉内皮细胞随机分为正常对照组、高糖刺激模型组、低强度脉冲超声30,60,90 mW/cm2组。高糖刺激模型组和低强度脉冲超声组人脐静脉内皮细胞给予25 mmol/L葡萄糖高糖刺激处理24 h从而建立高糖模型;低强度脉冲超声组细胞造模后给予30,60,90 mW/cm2低频脉冲处理,每天20 min,连续7 d。采用MTT法检测各组细胞活力,流式细胞仪检测各组细胞凋亡率,比色法检测各组细胞Caspase-3、9活性,分光光度法检测丙二醛水平、超氧化物歧化酶、过氧化氢酶及谷胱甘肽过氧化物酶活性,Western blot及RT-PCR检测各组细胞中JNK的表达。
结果与结论:①与正常对照组比较,高糖刺激模型组细胞活力明显降低(P < 0.01),细胞凋亡率升高(P < 0.01),丙二醛水平以及Caspase-3、9活性均显著提高(P < 0.01),超氧化物歧化酶、过氧化氢酶及谷胱甘肽过氧化物酶活性降低(P < 0.01),JNK表达水平上调(P < 0.01);②与高糖刺激模型组比较,低强度脉冲超声组细胞活力提高(P < 0.01),细胞凋亡率、丙二醛水平以及Caspase-3、9活性降低(P < 0.01),超氧化物歧化酶、过氧化氢酶及谷胱甘肽过氧化物酶活性提高(P < 0.01),JNK表达水平下调(P < 0.01),照射强度90 mW/cm2时以上变化最明显;③低强度脉冲超声可能通过提高细胞的抗氧化能力以及调控细胞中的JNK信号转导通路以抵抗细胞凋亡,进而抑制高糖诱导的人脐静脉内皮细胞损伤;照射强度90 mW/cm2时作用最显著。


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:
0000-0001-7060-1213(叶奎)

关键词: 人脐静脉内皮细胞, 低强度脉冲超声, 高糖刺激, 氧化应激, 细胞凋亡, JNK信号通路

Abstract:

BACKGROUND: Studies have shown that human umbilical vein endothelial cells participate in vascular structural disorders and dysfunction due to a series of causes, which may become a new target for the treatment of related diseases.
OBJECTIVE: To investigate the protective effect and mechanism of low-intensity pulsed ultrasound on the high glucose-induced injury to human umbilical vein endothelial cells. 
METHODS: Human umbilical vein endothelial cells were randomly divided into normal control group, high glucose group and 30, 60 and 90 mW/cm2 low-intensity pulsed ultrasound groups. For the high glucose group and three low-intensity pulsed ultrasound groups, the high-glucose stimulation with 25 mmol/L glucose was given. Additionally, the cells in the three low-intensity pulsed ultrasound groups received 30, 60, and 90 mW/cm2 low-intensity pulsed ultrasounds, 20 minutes per day for 7 continuous days, respectively. MTT was used to detect cell activity and flow cytometry was used to detect cell apoptosis in each experimental group. Colorimetry was used to detect Caspase-3 and -9 activities in the human umbilical vein endothelial cells. Spectrophotometry was used to detect malonaldehyde content, superoxide dismutase activity, catalase activity, and glutathione peroxidase activity. Expression of JNK in the cells was observed by western blot and RT-PCR.
RESULTS AND CONCLUSION: After high glucose treatment, the viability of human umbilical vein endothelial cells was significantly lowered; the apoptosis rate, malonaldehyde content and activities of Caspase 3 and 9 were significantly increased (P < 0.01); the activities of superoxide dismutase, catalase and glutathione peroxidase significantly decreased (P < 0.01); and the JNK expression level was up-regulated (P < 0.01). Compared with the high glucose group, the cell viability of the low-intensity pulsed ultrasound groups (30, 60,90 mW/cm2 subgroups) was increased (P < 0.01), and the apoptosis rate, malonaldehyde content, and Caspase 3, 9 activities were decreased (P < 0.01), superoxide dismutase, catalase and glutathione peroxidase activities were increased (P < 0.01), and JNK expression level was down-regulated (P < 0.01). The above changes were most obvious when the irradiation intensity was 90 mW/cm2. In conclusion, low-intensity pulsed ultrasound can inhibit the high glucose-induced apoptosis of human umbilical vein endothelial cells by increasing the antioxidant capacity and regulating the JNK signaling pathway, further inhibiting the high glucose-induced injury to the human umbilical vein endothelial cells. The low-intensity pulsed ultrasound at 90 mW/cm2 can achieve the best outcomes.

Key words: human umbilical vein endothelial cells, low-intensity pulsed ultrasound, high glucose stimulation, oxidative stress, apoptosis, JNK signaling pathway

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