1.河北科技大学 化学与制药工程学院,河北 石家庄 050018
2.军事医学研究院,北京 100850
陈爱兵,博士,教授,研究方向:能源材料,E-mail:chen_ab@163.com
徐 华,博士,副研究员,研究方向:药物毒物分析,E-mail:huarxu@163.com
收稿:2026-01-08,
修回:2026-02-10,
录用:2026-03-06,
网络首发:2026-03-20,
纸质出版:2026-05-15
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刘晓慧,刘玉龙,王朝霞,王勇,陈佳,薛晋娟,刘艳芹,陈爱兵,徐华,谢剑炜.尿液游离DNA加合物定量测定揭示3种氮芥暴露损伤及其特点[J].分析测试学报,2026,45(05):1-10.
LIU Xiao-hui,LIU Yu-long,WANG Zhao-xia,WANG Yong,CHEN Jia,XUE Jin-juan,LIU Yan-qin,CHEN Ai-bing,XU Hua,XIE Jian-wei.Quantitative Analysis of Urinary Free DNA Adducts Reveals Three Types of Nitrogen Mustard Exposure Damage and Their Characteristics[J].Journal of Instrumental Analysis,2026,45(05):1-10.
刘晓慧,刘玉龙,王朝霞,王勇,陈佳,薛晋娟,刘艳芹,陈爱兵,徐华,谢剑炜.尿液游离DNA加合物定量测定揭示3种氮芥暴露损伤及其特点[J].分析测试学报,2026,45(05):1-10. DOI: 10.12452/j.fxcsxb.26010801.
LIU Xiao-hui,LIU Yu-long,WANG Zhao-xia,WANG Yong,CHEN Jia,XUE Jin-juan,LIU Yan-qin,CHEN Ai-bing,XU Hua,XIE Jian-wei.Quantitative Analysis of Urinary Free DNA Adducts Reveals Three Types of Nitrogen Mustard Exposure Damage and Their Characteristics[J].Journal of Instrumental Analysis,2026,45(05):1-10. DOI: 10.12452/j.fxcsxb.26010801.
通过检测动物暴露于氮芥(HN)后形成的HN-DNA加合物,实现HN暴露溯源确证分析。6周龄、约200 g重的Sprague-Dawley(SD)大鼠经腹腔分别注射氮芥1(HN1)、氮芥2(HN2)和氮芥3(HN3)溶液构建毒剂暴露模型,设置氮芥暴露组(0.3 LD
50
、0.5 LD
50
和LD
50
组)和空白溶剂对照组。采用高效液相色谱-串联质谱(HPLC-MS/MS)多反应监测(MRM)模式,定量分析大鼠尿液中的HN-DNA加合物类型与含量。结果显示,12种HN-DNA加合物标准品在0.02~500 ng/mL范围内线性关系良好,检出限(LOD)为0.01~0.02 ng/mL,定量下限(LOQ)为0.02~0.05 ng/mL,批内与批间精密度的相对标准偏差(RSD)均小于15%。暴露12 h后,大鼠尿液中检出HN-AN3、HN-GN7、HN-GO6及HN-Bis-GN7加合物,含量为HN-GN7
>
HN-Bis-GN7
>
HN-AN3
>
HN-GO6。4种加合物浓度与暴露剂量呈正相关,并随时间延长逐渐降低。应用HPLC-MS/MS检测HN暴露后动物尿液中的DNA加合物,实现了HN暴露的无创早期检测、准确溯源和损伤评价,可为探究HN的DNA损伤修复过程和机制提供依据。
The identification of HN-DNA adducts formed in animals after exposure to nitrogen mustards(NMs,codenamed HN) enables the traceability and confirmatory analysis of HN exposure. Six-week-old Sprague-Dawley(SD) rats,with a mean weight of approximately 200 g,were given intraperitoneal injections of HN1,HN2,and HN3,respectively,to establish an exposure animal model. The nitrogen mustard exposure groups(0.3 LD
50
,0.5 LD
50
,or LD
50
exposure dose) as well as a blank solvent control group were set up. A high-performance liquid chromatography-tandem mass sp
ectrometry(HPLC-MS/MS) method employing multiple reaction monitoring(MRM) mode was established to quantitatively analyze the types and concentrations of HN-DNA adducts in rat urine samples. The results demonstrated a good linearity for the 12 HN-DNA adduct standards within the concentration range of 0.02-500 ng/mL,with limits of detection(LODs) of 0.01-0.02 ng/mL and limits of quantification(LOQs) of 0.02-0.05 ng/mL. The relative standard deviations(RSDs) of intra-assay and inter-assay precision were less than 15%. Urine analysis of HN-exposed SD rats at 12 hours post-exposure revealed the presence of HN-AN3,HN-GN7,HN-GO6,and HN-Bis-GN7 adducts,with concentrations decreasing in the order of HN-GN7
>
HN-Bis-GN7
>
HN-AN3
>
HN-GO6. The concentrations of the four DNA adducts demonstrated a dose-dependent positive correlation and a gradual decrease over time. The application of HPLC-MS/MS technique to detect these urinary DNA adducts allows for the non-invasive early detection,accurate traceability,and damage assessment of HN exposure. These findings provide an experimental basis for further study of HN-induced DNA damage repair processes and mechanisms.
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