法医学杂志 ›› 2021, Vol. 37 ›› Issue (6): 796-805.DOI: 10.12116/j.issn.1004-5619.2021.310206

所属专题: 合成毒品的法医毒理学研究

• 合成毒品的法医毒理学研究专题 • 上一篇    下一篇

CCK-8对甲基苯丙胺诱导细胞凋亡的抑制作用

张武华(), 张明龙, 景伟伟, 谢冰, 毕海涛, 于峰, 丛斌, 马春玲, 文迪()   

  1. 河北医科大学法医学院 河北省法医学重点实验室 河北省法医分子鉴定协同创新中心,河北 石家庄 050017
  • 收稿日期:2021-02-05 发布日期:2021-12-25 出版日期:2021-12-28
  • 通讯作者: 文迪
  • 作者简介:文迪,男,教授,主要从事法医毒理学研究;E-mail:wendi01125@126.com
    张武华(1992—),女,硕士研究生,主要从事法医毒理学研究;E-mail:1534027680@qq.com
  • 基金资助:
    国家自然科学基金面上项目(81772019)

Inhibitory Effect of CCK-8 on Methamphetamine-Induced Apoptosis

Wu-hua ZHANG(), Ming-long ZHANG, Wei-wei JING, Bing XIE, Hai-tao BI, Feng YU, Bin CONG, Chun-ling MA, Di WEN()   

  1. Collaborative Innovation Center of Forensic Medical Molecular Identification, Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
  • Received:2021-02-05 Online:2021-12-25 Published:2021-12-28
  • Contact: Di WEN

摘要: 目的

研究八肽胆囊收缩素(cholecystokinin octapeptide,CCK-8)与胆囊收缩素2受体(cholecystokinin 2 receptor,CCK2R)结合对甲基苯丙胺(methamphetamine,METH)诱导的神经元凋亡的抑制作用,并探讨β-arrestin 2在CCK-8抑制METH诱导神经元凋亡中的信号转导机制。

方法

培养SH-SY5Y细胞和慢病毒转染的HEK293-CCK1R和HEK293-CCK2R细胞,应用干扰小RNA(small interfering RNA,siRNA)敲减β-arrestin 2的表达。采用Annexin Ⅴ-FITC/PI染色和流式细胞术检测细胞的凋亡率,Western印迹法检测凋亡相关蛋白的表达。

结果

1 mmol/L、2 mmol/L METH可诱导SH-SY5Y细胞凋亡,核碎裂、固缩的细胞数量显著增加,凋亡相关蛋白Bax和活化型胱天蛋白酶3(cleaved caspase-3)表达升高。0.1 mmol/L和1 mmol/L CCK-8预处理均可逆转METH诱导的SH-SY5Y细胞凋亡,并抑制METH引起的核碎裂、固缩的细胞数量增多以及凋亡相关蛋白的改变。慢病毒转染构建HEK293-CCK1R和HEK293-CCK2R细胞,发现CCK-8对METH诱导HEK293-CCK1R细胞凋亡相关蛋白的变化无明显影响,但可抑制METH诱导的HEK293-CCK2R细胞凋亡相关蛋白表达水平的升高。敲减SH-SY5Y细胞的β-arrestin 2表达后可阻断CCK-8对METH诱导细胞凋亡的抑制作用。

结论

CCK-8可与CCK2R结合,并通过激活β-arrestin 2信号抑制METH诱导的细胞凋亡。

关键词: 法医毒理学, 细胞凋亡, 甲基苯丙胺, 八肽胆囊收缩素, 神经元, 受体, β-制动蛋白

Abstract: Objective

To investigate the inhibitory effect of cholecystokinin octapeptide (CCK-8) binding to cholecystokinin 2 receptor (CCK2R) on methamphetamine (METH)-induced neuronal apoptosis, and to explore the signal transduction mechanism of β-arrestin 2 in CCK-8 inhibiting METH-induced neuronal apoptosis.

Methods

SH-SY5Y cell line was cultured, and HEK293-CCK1R and HEK293-CCK2R cell line were constructed by lentivirus transfection. Small interfering RNA (siRNA) was used to knockdown the expression of β-arrestin 2. Annexin Ⅴ-FITC/PI staining and flow cytometry were used to detect the apoptotic rate of cells, and Western blotting was used to detect the expression of apoptosis-related proteins.

Results

The apoptosis of SH-SY5Y cells was induced by 1 mmol/L and 2 mmol/L METH treatment, the number of nuclear fragmentation and pyknotic cells was significantly increased, and the expression of apoptosis-related proteins Bax and cleaved caspase-3 were increased. CCK-8 pre-treatment at the dose of 0.1 mmol/L and 1 mmol/L significantly reversed METH-induced apoptosis in SH-SY5Y cells, and inhibited cell nuclear fragmentation, pyknosis and the changes of apoptosis-related proteins induced by METH. In lentivirus transfected HEK293-CCK1R and HEK293-CCK2R cells, the results revealed that CCK-8 had no significant effect on METH-induced changes of apoptosis-related proteins in HEK293-CCK1R cells, but it could inhibit the expression level of apoptosis-related proteins in HEK293-CCK2R cells induced by METH. The inhibitory effect of CCK-8 on METH-induced apoptosis was blocked by the knockdown of β-arrestin 2 expression in SH-SY5Y cells.

Conclusion

CCK-8 can bind to CCK2R and exert an inhibitory effect on METH-induced apoptosis by activating the β-arrestin 2 signal.

Key words: forensic toxicology, apoptosis, methamphetamine, cholecystokinin octapeptide, neuron, receptor, β-arrestin

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