法医学杂志 ›› 2022, Vol. 38 ›› Issue (2): 212-216.DOI: 10.12116/j.issn.1004-5619.2021.410116

• 论著 • 上一篇    下一篇

大鼠血液外泌体中外源性γ-羟基丁酸的检测

郜峥翔1(), 罗奇志1, 张亮2, 裴茂清2, 王慧君1, 岳霞1()   

  1. 1.南方医科大学法医学院,广东 广州 510080
    2.广东省公安厅刑事技术中心,广东 广州 510050
  • 收稿日期:2021-01-26 发布日期:2022-04-25 出版日期:2022-04-28
  • 通讯作者: 岳霞
  • 作者简介:岳霞,女,博士,主任法医师,主要从事法医病理学和毒理学研究;E-mail:yiluyangguang@163.com
    郜峥翔(1995—),男,硕士研究生,主要从事甲基苯丙胺毒性损伤机制研究;E-mail:1799661802@qq.com
  • 基金资助:
    国家自然科学基金面上项目(81871528)

Detection of Exogenous γ-Hydroxybutyric Acid in Rat Blood Exosomes

Zheng-xiang GAO1(), Qi-zhi LUO1, Liang ZHANG2, Mao-qing PEI2, Hui-jun WANG1, Xia YUE1()   

  1. 1.School of Forensic Medicine, Southern Medical University, Guangzhou 510080, China
    2.Criminal Technology Center, Guangdong Provincial Public Security Department, Guangzhou 510050, China
  • Received:2021-01-26 Online:2022-04-25 Published:2022-04-28
  • Contact: Xia YUE

摘要: 目的

建立基于外泌体的超高效液相色谱-质谱法(ultra-high performance liquid chromatography-mass spectrometry,UPLC-MS)定量检测大鼠血液中的γ-羟基丁酸(gamma-hydroxybutyrate,GHB),寻找区分内源性GHB和外源性GHB的方法。

方法

将成年雄性SD大鼠分为给药1 h、5 h、10 h组与对照组,给药组单次腹腔注射GHB前体物质γ-丁内酯(gamma-butyrolactone,GBL)后,分别于注射后1 h、5 h、10 h腹主动脉采血5 mL,对照组给予等量生理盐水后1 h采血5 mL。其中0.5 mL血液经前处理后直接进行UPLC-MS检测,剩余血液经差速超速离心提取外泌体后进行检测。

结果

对照组大鼠血液中GHB质量浓度为(87.36±33.48) ng/mL,给药1 h、5 h和10 h组大鼠血液中GHB质量浓度分别为(110 400.00±1 766.35)、(1 479.00±687.01)和(133.60±12.17) ng/mL。外泌体检测结果显示,对照组及给药10 h组均未检测到GHB峰值信号,给药1 h和5 h组GHB质量浓度分别为(91.47±33.44)和(49.43±7.05) ng/mL。

结论

通过提取大鼠血液外泌体后经UPLC-MS法检测GHB,证实外源性GHB可在血液外泌体中检出,而内源性GHB则不能检出,提示该方法可能作为判断是否有外源性药物摄入的依据。

关键词: 法医病理学, 外泌体, γ-羟基丁酸, γ-丁内酯, 超高效液相色谱-质谱法, 血液, 大鼠

Abstract: Objective

To find a method to distinguish exogenous gamma-hydroxybutyrate (GHB) from endogenous GHB by establishing ultra-high performance liquid chromatography-mass spectrometry (UPLC-MS) based on exosome for quantitative detection of GHB in the rat blood.

Methods

Adult male SD rats were divided into 1 h, 5 h, 10 h administration group and control group. After 1 h, 5 h and 10 h of single precursor of GHB gamma-butyrolactone (GBL) intraperitoneal injection in administration groups, 5 mL blood was collected from the abdominal aorta. Meanwhile, the control group was given a same dose of normal saline, and 5 mL blood was collected at 1 h. Among the 5 mL blood, 0.5 mL was directly detected by HPLC-MS after pretreatment, and exosomes were extracted from the remaining blood by differential centrifugation and detected.

Results

The concentration of GHB in the control group was (87.36±33.48) ng/mL, and the concentration with administration at 1 h, 5 h and 10 h was (110 400.00±1 766.35) ng/mL, (1 479.00±687.01) ng/mL and (133.60±12.17) ng/mL, respectively. The results of exosome detection showed that no peak GHB signal was detected in the control group and the 10 h administration group, and the concentrations of GHB at 1 h and 5 h administration groups were (91.47±33.44) ng/mL and (49.43±7.05) ng/mL, respectively.

Conclusion

GHB was detected in blood exosome by UPLC-MS, which indicated that exogenous GHB could be detected in plasma exosomes, while endogenous GHB could not be detected, suggesting that this method may be used as a basis to determine whether there is exogenous drug intake.

Key words: forensic pathology, exosome, gamma-hydroxybutyrate (GHB), gamma-butyrolactone (GBL), ultra-high performance liquid chromatography-mass spectrometry (UPLC-MS), blood, rats

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