中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (23): 4931-4938.doi: 10.12307/2025.513

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

血红素氧合酶1促进氧化应激条件下神经干细胞向神经元分化

于庆贺1,蔡子鸣2,田  禾3,李  翩4,阮  烨4,梁金柱2,林淑惠1,林文平1   

  1. 广州中医药大学附属深圳平乐骨伤科医院,1脊柱外科,3妇科,广东省深圳市   518118;2广州中医药大学附属深圳平乐骨伤科医院,广东省深圳市   518118;4广州中医药大学第三临床医学院,广东省广州市   510006
  • 收稿日期:2024-04-19 接受日期:2024-06-24 出版日期:2025-08-18 发布日期:2024-09-29
  • 通讯作者: 林文平,博士,主任医师,博士生导师,广州中医药大学附属深圳平乐骨伤科医院脊柱外科,广东省深圳市 518118
  • 作者简介:于庆贺,男,1992年生,河北省邢台市人,汉族,2020年南方医科大学毕业,硕士,医师,主要从事脊柱脊髓损伤修复方面的研究。
  • 基金资助:
    国家自然科学基金面上项目(81771323),项目负责人:林文平;广东省自然科学基金面上项目(2021A1515010722),项目负责人:林文平;深圳市自然科学基金面上项目(JCYJ20190813112401660),项目负责人:林文平

Heme oxygenase 1 promotes differentiation of neural stem cells into neurons under oxidative stress condition

Yu Qinghe1, Cai Ziming2, Tian He3, Li Pian4, Ruan Ye4, Liang Jinzhu2, Lin Shuhui1, Lin Wenping1   

  1. 1Department of Spine Surgery, 3Department of Gynaecology, Shenzhen Pingle Orthopedic Hospital Affiliated to Guangzhou University of Chinese Medicine, Shenzhen 518118, Guangdong Province, China; 2Shenzhen Pingle Orthopedic Hospital Affiliated to Guangzhou University of Chinese Medicine, Shenzhen 518118, Guangdong Province, China; 4Third School of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China
  • Received:2024-04-19 Accepted:2024-06-24 Online:2025-08-18 Published:2024-09-29
  • Contact: Lin Wenping, MD, Chief physician, Doctoral supervisor, Department of Spine Surgery, Shenzhen Pingle Orthopedic Hospital Affiliated to Guangzhou University of Chinese Medicine, Shenzhen 518118, Guangdong Province, China
  • About author:Yu Qinghe, Master, Physician, Department of Spine Surgery, Shenzhen Pingle Orthopedic Hospital Affiliated to Guangzhou University of Chinese Medicine, Shenzhen 518118, Guangdong Province, China
  • Supported by:
    National Natural Science Foundation of China (General Program), No. 81771323 (to LWP); Natural Science Foundation of Guangdong Province, No. 2021A1515010722 (to LWP); Natural Science Foundation of Shenzhen Municipality, No. JCYJ20190813112401660 (to LWP)

摘要:

文题释义:

血红素氧合酶1:是血红素代谢过程的限速酶,可催化血红素降解为一氧化碳、胆绿素和亚铁,具有抗炎、抗氧化的作用,参与调节细胞的增殖、凋亡等重要生理过程。
神经干细胞:存在于神经系统,正常生理情况下保持静止,在中枢神经系统损伤等条件下能进行自我更新并可分化为神经元细胞、星形胶质细胞和少突胶质细胞,具有免疫调节和促进神经再生等多种功能。

摘要
背景:研究表明,血红素氧合酶1能增强细胞的抗氧化、抗凋亡能力,但血红素氧合酶1过表达对氧化应激条件下神经干细胞增殖和分化的影响尚不清楚。
目的:探讨血红素氧合酶1过表达对氧化应激条件下神经干细胞存活和分化能力的影响。
方法:①从新生Balb/c小鼠脊髓组织中分离培养小鼠原代神经干细胞,免疫荧光检测神经干细胞标志物Nestin的表达;②采用慢病毒感染神经干细胞以诱导血红素氧合酶1过表达,流式检测绿色荧光蛋白荧光强度,Western blot检测血红素氧合酶1的表达水平;③在慢病毒感染神经干细胞培养基中添加H2O2以模拟脊髓损伤后的氧化应激微环境,采用细胞增殖检测试剂盒、细胞凋亡检测试剂盒和TUNEL染色试剂盒分析血红素氧合酶1过表达对神经干细胞增殖和凋亡水平的影响;④采用试剂盒检测脂质氧化标志物丙二醛、过氧化氢酶、超氧化物歧化酶和谷胱甘肽过氧化物酶水平;⑤采用流式检测细胞内的活性氧水平以及神经干细胞向星形胶质细胞和神经元分化情况;⑥光学和荧光显微镜观察血红素氧合酶1过表达对神经干细胞分化的神经元轴突生长的影响。
结果与结论:①小鼠神经干细胞球形态稳定,生长状态良好,免疫荧光检测Nestin呈阳性;②Western blot检测发现血红素氧合酶1过表达组神经干细胞中血红素氧合酶1的表达显著高于空载体对照组;流式检测血红素氧合酶1过表达组和空载体对照组神经干细胞均表达绿色荧光蛋白;③血红素氧合酶1过表达维持了神经干细胞在氧化应激条件下的增殖活力并显著减少了细胞凋亡数量;④血红素氧合酶1过表达抑制了氧化应激微环境下神经干细胞的脂质过氧化,增强了维持氧化-还原稳态的相关酶类表达,降低了细胞内的活性氧水平;⑤血红素氧合酶1过表达促进了神经干细胞向神经元分化,并抑制了向星形胶质细胞分化;⑥血红素氧合酶1过表达组的神经元轴突更长并且细胞间的连接更多。上述结果表明过表达血红素氧合酶1能减轻H2O2诱导的神经干细胞氧化损伤,抑制神经干细胞凋亡,促进神经干细胞增殖及向神经元细胞分化。

关键词: 血红素氧合酶1, 神经干细胞, 氧化应激, 脊髓损伤, 神经元, 凋亡, 轴突

Abstract: BACKGROUND: Studies have shown that upregulation of heme oxygenase-1 expression enhances cellular antioxidant and anti-apoptotic abilities. However, the effects of upregulating heme oxygenase-1 expression on the proliferation and differentiation of neural stem cells under oxidative stress conditions remain unclear. 
OBJECTIVE: To investigate the influence of heme oxygenase-1 overexpression on the survival and differentiation capacity of neural stem cells under oxidative stress conditions. 
METHODS: (1) Mouse primary neural stem cells were isolated and cultured from newborn Balb/c mice. Immunofluorescence was used to detect the neural stem cell marker Nestin. (2) Lentivirus was used to infect neural stem cells to induce heme oxygenase-1 overexpression. Flow cytometry was used to assess green fluorescent protein fluorescence. Western blot assay was performed to detect the expression levels of heme oxygenase-1. (3) H2O2 was added to the lentivirus-infected neural stem cell culture medium to simulate the oxidative stress microenvironment after spinal cord injury. Effects of heme oxygenase-1 overexpression on neural stem cell proliferation and apoptosis levels were analyzed using cell proliferation assay kits, cell apoptosis assay kits, and TUNEL staining kits. (4) The levels of lipid oxidation markers malondialdehyde, catalase, superoxide dismutase, and glutathione peroxidase were detected using assay kits. (5) Flow cytometry was used to measure intracellular reactive oxygen species levels, and neural stem cell differentiation into astrocytes and neurons. (6) The effect of heme oxygenase-1 overexpression on neuronal axon growth during neural stem cell differentiation was observed under optical and fluorescence microscopes. 
RESULTS AND CONCLUSION: (1) Mouse neural stem cells exhibited stable morphology, good growth status, and high expression of Nestin as detected by immunofluorescence. (2) Western blot analysis showed that the overexpression of heme oxygenase-1 in the overexpression group was significantly higher than that in the empty carrier control group. Flow cytometry was used to detect the expression of green fluorescent protein in the neural stem cells of the heme oxygenase-1 overexpression group and empty vector control group. (3) Overexpression of heme oxygenase-1 maintained the proliferative activity of neural stem cells and significantly reduced the number of apoptotic cells under oxidative stress conditions. (4) Overexpression of heme oxygenase-1 inhibited lipid peroxidation of neural stem cells under oxidative stress microenvironment, enhanced the expression of enzymes related to maintaining the oxidative-reductive balance, and significantly reduced intracellular reactive oxygen species levels. (5) Overexpression of heme oxygenase-1 promoted the differentiation of neural stem cells into neurons and reduced differentiation into astrocytes. (6) The heme oxygenase-1 overexpression group exhibited longer axons, and more intercellular connections. The above results indicate that overexpression of heme oxygenase-1 can alleviate oxidative damage of H2O2-induced neural stem cells, reduce neural stem cell apoptosis, promote proliferation, and facilitate differentiation of neural stem cells into neurons.

Key words: heme oxygenase-1, neural stem cell, oxidative stress, spinal cord injury, neuron, apoptosis, axon

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