法医学杂志 ›› 2025, Vol. 41 ›› Issue (6): 1-7.DOI: 10.12116/j.issn.1004-5619.2023.431104

• 论著 •    

铁吸收异常在CO中毒致脑白质损伤中的作用

杨锦萱1(), 田栋安1, 唐欣雨1, 赵展英1, 荆奚悦1, 王冬梅1, 田小菲1,2()   

  1. 1.河北北方学院法医学教研室,河北 张家口 075000
    2.河北医科大学法医学院,河北 石家庄 050011
  • 收稿日期:2023-11-16 发布日期:2026-01-28 出版日期:2025-12-25
  • 通讯作者: 田小菲
  • 作者简介:杨锦萱(2002—),女,主要从事法医学研究;E-mail:2416850752@qq.com
  • 基金资助:
    省属高校基本科研业务费自然科学研究计划资助项目(JYT2020011);河北北方学院自然科学研究计划资助项目(XJ2023045)

The Role of Iron Dysregulation in White Matter Injury Induced by Carbon Mono- xide Poisoning

Jin-xuan YANG1(), Dong-an TIAN1, Xin-yu TANG1, Zhan-ying ZHAO1, Xi-yue JING1, Dong-mei WANG1, Xiao-fei TIAN1,2()   

  1. 1.Department of Forensic Medicine, Hebei North University, Zhangjiakou 075000, Hebei Province, China
    2.College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050011, China
  • Received:2023-11-16 Online:2026-01-28 Published:2025-12-25
  • Contact: Xiao-fei TIAN

摘要:

目的 探讨一氧化碳(carbon monoxide,CO)中毒致小鼠脑白质损伤部位神经细胞铁代谢变化及肠道菌群紊乱对机体铁离子吸收的可能机制。 方法 将C57BL/6小鼠置于密闭广口瓶中给予CO气体制作CO中毒小鼠模型,对照组予相同处理但不给予CO气体。对小鼠脑白质部位取材,观察脑白质的形态学改变,通过免疫组织化学和蛋白质印迹法分析转铁蛋白(transferrin,TRF)和谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)的表达变化。同时,于小鼠染毒后3 d和7 d收集粪便,进行16S rRNA测序,分析CO中毒引起的小鼠肠道菌群变化。 结果 电镜结果显示,CO中毒导致小鼠脑白质部位出现明显脱髓鞘病变,TRF表达升高,GPX4表达降低。CO中毒导致小鼠肠道菌群分布异常,致肠组织铁离子吸收异常。 结论 CO中毒可导致脑白质部位神经细胞损伤,进而导致脱髓鞘病变,也可引起小鼠肠道菌群分布和铁离子吸收异常。

关键词: 法医病理学, 法医毒理学, 一氧化碳中毒, 肠道菌群, 脑白质, 脱髓鞘, 铁死亡, 小鼠

Abstract:

Objective To investigate the effects of carbon monoxide (CO) poisoning on intestinal flora and iron absorption, and to analyze the effects of intestinal flora disorder on iron absorption and nerve cells in white matter, and to clarify its role in demyelinating lesions caused by CO poisoning. Methods C57BL/6 mice were placed in a closed jar and given CO gas to make a mouse model of CO poisoning. The control group was given the same treatment but not given CO gas. The feces of mice were collected at 3 days and 7 days after exposure, and 16 SrRNA sequencing was performed to analyze the changes of intestinal flora in mice caused by CO poisoning. At the same time, the white matter of mice was taken to observe the morphological changes of white matter, and the expression of transferrin (TRF) and glutathione peroxidase 4 (GPX4)was analyzed by immunohistochemistry and Western blot. Results CO poisoning led to abnormal distribution of intestinal flora in mice, resulting in abnormal absorption of iron ions in intestinal tissue. The results of electron microscopy showed that CO poisoning caused obvious demyelination in the white matter of mice. CO poisoning increased the expression of TRF and decreased the expression of GPX4 in the white matter. Conclusion CO poisoning caused abnormal intestinal flora distribution and iron ion absorption in mice, and ferroptosis occurred in the white matter of the brain, which led to demyelination in the white matter of the brain.

Key words: forensic pathology, forensic toxicology, carbon monoxide poisoning, intestinal flora, white matter, demyelination, ferroptosis, rice

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