Article(id=1322954477170458960, tenantId=1146029695717560320, journalId=1319373162502258839, issueId=1322954407050092740, articleNumber=null, orderNo=null, doi=10.16016/j.2097-0927.202505051, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747843200000, receivedDateStr=2025-05-22, revisedDate=1757001600000, revisedDateStr=2025-09-05, acceptedDate=null, acceptedDateStr=null, onlineDate=1793346526662, onlineDateStr=2026-10-30, pubDate=1760457600000, pubDateStr=2025-10-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793346526662, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793346526662, creator=13701087609, updateTime=1793346526662, updator=13701087609, issue=Issue{id=1322954407050092740, tenantId=1146029695717560320, journalId=1319373162502258839, year='2025', volume='47', issue='19', pageStart='2289', pageEnd='2444', issueExtLink='null', onlineDate='null', pubDate='1760457600000', pubDateStr='2025-10-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793346509945, creator='13701087609', updateTime=1793346509945, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=2315, endPage=2326, ext={EN=ArticleExt(id=1322954477598277969, articleId=1322954477170458960, tenantId=1146029695717560320, journalId=1319373162502258839, language=EN, title=PCBP1-mediated regulation of iron homeostasis suppresses ferroptosis against cadmium-induced neurotoxicity in mouse neuroblastoma cells, columnId=1320435149808980440, journalTitle=Journal of Army Medical University, columnName=Neuroscience, runingTitle=null, highlight=null, articleAbstract=
Objective To investigate the role of poly(rC)-binding protein 1 (PCBP1) in cadmium (Cd)-induced ferroptosis in mouse neuroblastoma Neuro-2a (N2A) cells.
Methods N2A cells were exposed to a concentration gradient of CdCl₂ (0, 1, 2, 4 μmol/L) for 72 h. Cell viability was assessed by trypan blue staining. Western blotting was employed to detect the expression of ferroptosis-related proteins (GPX4, HMOX1, ACSL4) and PCBP1. Intracellular Fe²⁺ level and lipid peroxidation were detected using FerroOrange and BODIPY581/591 C11 probes, respectively. Ferrostatin-1 (Fer-1), a ferroptosis inhibitor, was applied to confirm the critical role of ferroptosis in Cd-induced cytotoxicity. Molecular docking was performed to elucidate the interaction between PCBP1 and ferritin, as well as the binding sites of Cd²⁺. PCBP1 overexpression plasmid was further constructed for functional validation.
Results Cd exposure suppressed cell viability in N2A cells in a dose-dependent manner (P<0.01), significantly down-regulated GPX4 expression (P<0.05), up-regulated HMOX1 expression (P<0.01), and induced Fe²⁺ overload and lipid peroxidation (P<0.01). Molecular docking revealed that Cd²⁺ directly bound to the KH2 domain of PCBP1 and then co-localized on the outer surface of ferritin heavy chain. Overexpression of PCBP1 markedly reversed Cd-induced Fe²⁺ accumulation, GPX4 down-regulation, lipid peroxidation, and cell death.
Conclusion Cd exposure disrupts PCBP1-mediated iron homeostasis via transcriptional suppression and competitive displacement of metal ions, and then synergistically drives Fe²⁺ overload-triggered ferroptosis cascades, ultimately leading to neurotoxicity. Targeting PCBP1-mediated iron homeostasis can effectively mitigate Cd-induced neurotoxicity, and may serve as a novel therapeutic strategy.
, authors=Sheng JIE, Rui TIAN, Yuchen QU, Li TIAN, Jia XIE, Mengyan CHEN, Mindi HE, Zhengping YU, Huifeng PI, Ping DENG, authorsList=Sheng JIE, Rui TIAN, Yuchen QU, Li TIAN, Jia XIE, Mengyan CHEN, Mindi HE, Zhengping YU, Huifeng PI, Ping DENG, authorCompany=null, correspAuthors=Ping DENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=© 2025 Journal of Army Medical University, copyrightOwner=Editorial Office of Journal of Army Medical University, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322954483797459297, articleId=1322954477170458960, tenantId=1146029695717560320, journalId=1319373162502258839, language=CN, title=PCBP1调控铁稳态抑制铁死亡对抗镉神经毒性的作用研究, columnId=1320435149964169690, journalTitle=陆军军医大学学报, columnName=论著·神经科学, runingTitle=null, highlight=null, articleAbstract=
目的 探讨聚(rC)结合蛋白1 [Poly(rC)-binding protein 1,PCBP1]在镉(Cadmium,Cd)诱导小鼠神经细胞Neuro-2a(N2A)铁死亡中的作用。
方法 以N2A细胞构建浓度梯度(0、1、2、4 μmol/L)CdCl₂体外暴露模型(72 h)。通过台盼蓝染色检测细胞存活率,Western blot分析铁死亡相关蛋白(GPX4、HMOX1、ACSL4)及PCBP1表达。以FerroOrange和BODIPY581/591C11 探针检测胞内Fe²⁺和脂质过氧化水平。应用铁死亡抑制剂Fer-1明确铁死亡在镉暴露抑制N2A细胞存活率中的重要作用。以分子对接技术解析PCBP1与铁蛋白的互作模式及与Cd²⁺的结合位点。进一步构建PCBP1过表达质粒验证其重要作用及功能。
结果 镉暴露以剂量依赖性方式抑制细胞存活率(P<0.01),显著下调GPX4表达水平(P<0.05),上调HMOX1表达水平(P<0.01),诱导Fe²⁺过量蓄积及脂质过氧化水平显著增加(P<0.01)。分子对接揭示,Cd²⁺可直接结合PCBP1的KH2结构域,并且可共同结合于铁蛋白重链外侧。过表达PCBP1可明显逆转镉暴露诱导的Fe²⁺蓄积、GPX4表达下调、过氧化脂质增加及细胞存活率下降。
结论 镉暴露通过抑制PCBP1表达及以金属离子竞争扰乱PCBP1介导的铁稳态网络,协同驱动Fe²⁺超载触发铁死亡级联反应,最终导致神经毒性。靶向PCBP1介导的铁稳态可有效抑制铁死亡,为干预镉神经毒性提供新策略。
, authors=揭晟, 田蕊, 曲育辰, 田丽, 谢佳, 陈梦妍, 何旻蒂, 余争平, 皮会丰, 邓平, authorsList=揭晟, 田蕊, 曲育辰, 田丽, 谢佳, 陈梦妍, 何旻蒂, 余争平, 皮会丰, 邓平, authorCompany=null, correspAuthors=邓平, authorNote=null, correspAuthorsNote=
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1陆军军医大学(第三军医大学)军队劳动卫生学教研室,电磁辐射医学防护教育部重点实验室,重庆)])]), Author(id=1322954487706550642, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322954487983374708, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, authorId=1322954487706550642, language=EN, stringName=Yuchen QU, firstName=Yuchen, middleName=null, lastName=QU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=
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1陆军军医大学(第三军医大学)军队劳动卫生学教研室,电磁辐射医学防护教育部重点实验室,重庆, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322954485999468900, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, xref=1, ext=[AuthorCompanyExt(id=1322954486012051813, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, companyId=1322954485999468900, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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26(15):3297-3313., articleTitle=Metal exchange in the interprotein Zn(II)-binding site of the Rad50 hook domain:structural insights into Cd(II)- induced DNA-repair inhibition, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1322954485999468900, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, xref=1, ext=[AuthorCompanyExt(id=1322954486012051813, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, companyId=1322954485999468900, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1Department of Occupational Health,Key Laboratory of Electromagnetic Radiation Protection of Ministry of Education,Faculty of Military Preventive Medicine,Army Medical University (Third Military Medical University),Chongqing,China), AuthorCompanyExt(id=1322954486297264486, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, companyId=1322954485999468900, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1陆军军医大学(第三军医大学)军队劳动卫生学教研室,电磁辐射医学防护教育部重点实验室,重庆)])], figs=[ArticleFig(id=1322954496384565667, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 1, caption=
Significantly inhibited survival rate of N2A cells after Cd exposure (n=3,±s), figureFileSmall=n7weezrzrza+CP4y7/4TLA==, figureFileBig=DmKOmWcbX2bSuQqaOrRcGg==, tableContent=null), ArticleFig(id=1322954496455868836, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图1, caption=
Cd暴露显著抑制N2A细胞存活率(n=3,±s)a:P<0.05,b: P<0.01,compared with the control group (0 μmol/L CdCl2)
, figureFileSmall=n7weezrzrza+CP4y7/4TLA==, figureFileBig=DmKOmWcbX2bSuQqaOrRcGg==, tableContent=null), ArticleFig(id=1322954496669778342, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 2, caption=
Cd exposure induced ferroptosis in N2A cells, figureFileSmall=extIPnP9U+di4wK07cIUzQ==, figureFileBig=LOQkdvWErfuKcStWbw/PAw==, tableContent=null), ArticleFig(id=1322954496833356199, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图2, caption=
Cd暴露诱导N2A细胞铁死亡A:Western blotting results and semi-quantitative analysis of HMOX1 (n=3,±s); B:Western blotting results and semi-quantitative analysis of GPX4 (n=3,±s); C:Western blotting results and semi-quantitative analysis of ACSL4 (n=3,±s); D:Representative FerroOrange fluorescence images of intracellular ferrous ions (Fe²⁺) and quantitative analysis (n=6,±s); E:BODIPY581/591 C11 fluorescence intensity assay and analytical results (n=4,±s). a:P<0.05,b:P<0.01,compared with the control group
, figureFileSmall=extIPnP9U+di4wK07cIUzQ==, figureFileBig=LOQkdvWErfuKcStWbw/PAw==, tableContent=null), ArticleFig(id=1322954496908853672, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 3, caption=
Antagonization of Cd exposure-induced ferroptosis in N2A cells by Fer-1 (n=3,±s), figureFileSmall=1DiAHxJBBG6OGhoumuXgvw==, figureFileBig=gqIIx9dzOkvxsbCf8NoNcQ==, tableContent=null), ArticleFig(id=1322954497206649257, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图3, caption=
Fer-1拮抗Cd暴露诱导N2A细胞铁死亡(n=3,±s)A:Histogram of cell viability by trypan blue staining; B:Western blotting results and semi-quantitative analysis of ACSL4; C:Western blotting results and semi-quantitative analysis of GPX4; D:Representative FerroOrange fluorescence images of intracellular ferrous ions (Fe²⁺) and quantitative analysis; E:BODIPY581/591 C11 fluorescence intensity assay and statistical results. a:P<0.05,b:P<0.01,compared with the Cd group
, figureFileSmall=1DiAHxJBBG6OGhoumuXgvw==, figureFileBig=gqIIx9dzOkvxsbCf8NoNcQ==, tableContent=null), ArticleFig(id=1322954498905342380, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 4, caption=
Inhibited PCBP1 expression in N2A cells after Cd exposure (n=3,±s), figureFileSmall=08a5e8LwxuZtzXKAfA5pBQ==, figureFileBig=L3MkIVYLBnT+v/Tdr+rwSQ==, tableContent=null), ArticleFig(id=1322954498997617069, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图4, caption=
Cd暴露N2A细胞抑制PCBP1表达(n=3,±s)A:mRNA expression of PCBP1; B:Western blotting results and semiquantitative results of PCBP1. a:P<0.05,compared with the 0 μmol/L group
, figureFileSmall=08a5e8LwxuZtzXKAfA5pBQ==, figureFileBig=L3MkIVYLBnT+v/Tdr+rwSQ==, tableContent=null), ArticleFig(id=1322954499068920238, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 5, caption=
Molecular docking results of PCBP1 delivering Cd²⁺ to ferritin, figureFileSmall=C9M5BdiqO1NN50LIVyEAuw==, figureFileBig=0NFTn7ilDkMUzFBrmwls1g==, tableContent=null), ArticleFig(id=1322954499354132911, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图5, caption=
PCBP1携带Cd2+结合Ferritin对接结果A:Binding site of PCBP1_KH2 with Cd²⁺; B:Binding conformation of PCBP1_KH2 with ferritin heavy chain (ZDock score:12.14,ZRank score:-59.556); C:Binding status of Cd²⁺-PCBP1_KH2 complex to ferritin heavy chain. PCBP1 and ferritin are shown in orange and blue surfaces,respectively. Key residues at the PCBP1-ferritin interface are represented as stick models in corresponding colors.
, figureFileSmall=C9M5BdiqO1NN50LIVyEAuw==, figureFileBig=0NFTn7ilDkMUzFBrmwls1g==, tableContent=null), ArticleFig(id=1322954499429630384, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 6, caption=
Antagonization of Cd exposure-induced disruption of iron homeostasis in N2A cells after PCBP1 overexpression, figureFileSmall=++cEvc4iWmZFCl3vj+czgA==, figureFileBig=G5kcNkMMk2BbsT9iYFl2ew==, tableContent=null), ArticleFig(id=1322954499526099377, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图6, caption=
过表达PCBP1拮抗Cd暴露破坏N2A细胞铁稳态A:mRNA expression of PCBP1 (n=3,±s); B:Cellular Fe²⁺ level (n=3,±s); C:Cellular Fe³⁺ level after PCBP1 overexpression (n=3,±s); D:Representative images of FerroOrange detection for intracellular Fe²⁺ and quantitative analysis (n=3,±s). a:P<0.05,b:P<0.01,compared with the Cd group; c:P<0.01,compared with the Vector group
, figureFileSmall=++cEvc4iWmZFCl3vj+czgA==, figureFileBig=G5kcNkMMk2BbsT9iYFl2ew==, tableContent=null), ArticleFig(id=1322954499601596850, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=EN, label=Figure 7, caption=
Antagonization of Cd-induced ferroptosis in N2A cells by PCBP1 overexpression, figureFileSmall=xEjP9YkQvwImjtx9Tsf9lg==, figureFileBig=MrKtn9uTo9M9C+z1hsc54A==, tableContent=null), ArticleFig(id=1322954499664511411, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322954477170458960, language=CN, label=图7, caption=
过表达PCBP1拮抗Cd诱导N2A细胞铁死亡A:Western blotting results and semi-quantitative analysis of GPX4 (n=3,±s); B:BODIPY581/591 C11 fluorescence intensity assay and quantitative analysis (n=4,±s). Scale bar:10 μm; C:Results of trypan blue staining (n=3,±s). a:P<0.05,b:P<0.01,compared with the Cd group
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