Article(id=1190310110359556906, tenantId=1146029695717560320, journalId=1189873630562394117, issueId=1190243275249390089, articleNumber=null, orderNo=null, doi=10.11855/j.issn.0577-7402.0149.2024.1219, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1706716800000, receivedDateStr=2024-02-01, revisedDate=null, revisedDateStr=null, acceptedDate=1712073600000, acceptedDateStr=2024-04-03, onlineDate=1761721645202, onlineDateStr=2025-10-29, pubDate=1748361600000, pubDateStr=2025-05-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761721645202, onlineIssueDateStr=2025-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761721645202, creator=13701087609, updateTime=1761721645202, updator=13701087609, issue=Issue{id=1190243275249390089, tenantId=1146029695717560320, journalId=1189873630562394117, year='2025', volume='50', issue='5', pageStart='505', pageEnd='640', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761705710470, creator=13701087609, updateTime=1765784077922, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1207349188233372409, tenantId=1146029695717560320, journalId=1189873630562394117, issueId=1190243275249390089, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1207349188233372410, tenantId=1146029695717560320, journalId=1189873630562394117, issueId=1190243275249390089, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=558, endPage=565, ext={EN=ArticleExt(id=1190310110682518315, articleId=1190310110359556906, tenantId=1146029695717560320, journalId=1189873630562394117, language=EN, title=The effect of Pin1 on stemness-induced epithelial-mesenchymal transition in cervical cancer cells and its mechanism, columnId=1190310110212751762, journalTitle=Medical Journal of Chinese People’s Liberation Army, columnName=Basic Research, runingTitle=null, highlight=null, articleAbstract=

Objective To investigate the role of peptidyl prolyl cis-trans isomerase 1 (Pin1) in mediating stemness of tumor cells and the molecular mechanism of inducing epithelial-mesenchymal transition (EMT) in cervical cancer cells. Methods The Siha and Hele cells of Pin1 low-expression stable transfection uterine cervical neoplasm cell lines were constructed using lentivirus transfection technology and were divided into control group (shPin1-NON), knockdown group 1 (shPin1-1) and knockdown group 2 (shPin1-2). Western blotting and quantitative real-time polymerase chain reaction (qRT-PCR) were used to detect the expressions of Sex-determining region Y transcription factor 2 (SOX2), Aldehyde dehydrogenase 1A1 (ALDH1A1), and Cell adhesion molecule 44 (CD44). The serum-free spheroidization method was used to induce cervical cancer spheroids, with the adherent culture of cervical cancer cells as a control. Subsequently, Western blotting and qRT-PCR were employed to detect the expression of SOX2, ALDH1A1 and CD44 in both spheroid cells and adherent cells. Spheroid formation assay was used to detect the spheroid formation of cervical cancer cells after Pin1 knockdown. Transwell assay was used to detect the migration and invasion abilities of cervical cancer cells following down-regulation of Pin1. Western blotting and qRT-PCR were used to detect the expression of E-cadherin and N-cadherin attribute proteins in cervical cancer cells after transfection with pin1 low expression lentivirus. Western blotting and qRT-PCR were also used to assess the effects of Pin1 low expression on the expression levels of key proteins (c-Jun and c-Fos) of the transcriptional complex of Activator protein 1 (AP-1). Immunofluorescence combined with co-immunoprecipitation assays were conducted to detect the interaction and colocalization of Pin1 with c-Jun. Results In Siha and Hele cells, the mRNA and protein expression levels of Pin1, SOX2, ALDH1A1 and CD44 in shPin1-NON group were significantly higher than those in shPin1-1 group and shPin1-2 group (P<0.05). The expression levels of SOX2, ALDH1A1 and CD44 mRNA and protein in cervical cancer spheroid group were significantly higher than those in adherent cervical cancer cells (P<0.05). Compared with shPin1-NON group, the spheroidism and migration invasion abilities of shPin1-1 group and shPin1-2 group were significantly reduced (P<0.05). Compared with shPin1-NON group, the mRNA and protein expressions of E-cadherin in shPin1-1 and shPin1-2 groups were significantly increased (P<0.05), while the mRNA and protein expression levels of N-cadherin were significantly decreased (P<0.05). The mRNA and protein expression levels of c-Jun and c-Fos in shPin1-NON group were significantly higher than those in shPin1-1 group and shPin1-2 group (P<0.05). Conclusions Down-regulation of Pin1 can inhibit the stemness and migration invasion of cervical cancer cells, and Pin1 may mediate AP-1 to regulate the occurrence of stemness-induced epithelial-mesenchymal transition in cervical cancer cells.

, correspAuthors=Hasim Ashamgul, authorNote=null, correspAuthorsNote=
E-mail:
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目的 探讨宫颈癌细胞中肽基脯氨酰顺反异构酶1(Pin1)介导肿瘤细胞干性的作用及诱导上皮-间质转化(EMT)的分子机制。方法 选取宫颈癌细胞系Siha(鳞状细胞癌)、Hela(腺癌)细胞,采用慢病毒转染技术构建Pin1低表达稳转细胞株,根据不同处理分为3组:敲低组1(shPin1-1)、敲低组2(shPin1-2)及对照组(shPin1-NON)。采用qRT-PCR及Western blotting检测敲低Pin1后宫颈癌细胞中性别决定区Y转录因子2(SOX2)、醛脱氢酶1A1(ALDH1A1)、细胞黏附分子44(CD44) mRNA及蛋白的表达情况。以无血清成球法诱导宫颈癌成球细胞,以贴壁培养宫颈癌细胞为对照,并采用qRT-PCR及Western blotting检测SOX2ALDH1A1CD44 mRNA及蛋白的表达情况进行验证。采用球体形成实验检测Pin1敲低后各组宫颈癌细胞的球体形成情况,Transwell检测各组细胞的迁移、侵袭能力,qRT-PCR及Western blotting检测各组细胞中上皮属性蛋白E-钙黏蛋白(E-cadherin)、间质属性蛋白N-钙黏蛋白(N-cadherin)以及激活蛋白1(AP-1)转录复合物关键蛋白(c-Junc-Fos) mRNA及蛋白的表达情况。采用免疫荧光结合免疫共沉淀实验检测Pin1与c-Jun的相互作用及共定位情况。结果 Siha和Hela细胞中,下调Pin1后shPin1-1组及shPin1-2组Pin1SOX2ALDH1A1CD44 mRNA及蛋白表达水平明显低于shPin1-NON组(P<0.05);无血清宫颈癌球体细胞中SOX2、ALDH1A1CD44 mRNA及蛋白表达水平明显高于宫颈癌贴壁细胞(P<0.05)。与shPin1-NON组比较,shPin1-1组、shPin1-2组细胞成球性及迁移、侵袭能力明显降低(P<0.05),E-cadherin mRNA及蛋白表达水平明显升高(P<0.05),而N-cadherin mRNA及蛋白表达水平明显降低(P<0.05);shPin1-1组及shPin1-2组c-Junc-Fos mRNA及蛋白表达水平明显低于shPin1-NON组(P<0.05)。结论 下调Pin1可抑制宫颈癌细胞的干性和迁移、侵袭能力,Pin1可能通过介导AP-1调控宫颈癌细胞干性诱导EMT的发生。

, correspAuthors=阿仙姑·哈斯木, authorNote=null, correspAuthorsNote=
阿仙姑·哈斯木,E-mail:
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海燕,硕士研究生,主要从事妇科肿瘤方面的研究

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海燕,硕士研究生,主要从事妇科肿瘤方面的研究

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海燕,硕士研究生,主要从事妇科肿瘤方面的研究

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Pin1. 肽基脯氨酰顺反异构酶1;CD44. 细胞黏附分子44;ALDH1A1. 醛脱氢酶1A1;SOX2. 性别决定区Y转录因子2;GAPDH. 甘油醛-3-磷酸脱氢酶;A. Western blotting检测下调Pin1后Pin1、干细胞标志物蛋白的表达情况;B. qRT-PCR检测下调Pin1后干细胞标志物mRNA的表达情况;C. Western blotting检测贴壁细胞及球体细胞中干细胞标记物蛋白的表达情况;D. qRT-PCR检测贴壁细胞及球体细胞中干细胞标志物mRNA的表达情况;*P<0.05,**P<0.01,***P<0.001,****P<0.0001

, figureFileSmall=xx0EaqUF7vyT037uvKC6lg==, figureFileBig=G83JL4ApdxtLB4sXkVAHTw==, tableContent=null), ArticleFig(id=1190330525349937958, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=EN, label=Fig.2, caption=Effect of Pin1 knockdown on spheroidism of cervical cancer cells, figureFileSmall=IZ3a1LsMFtkjDXX6xhKOGw==, figureFileBig=HIZzQP+JsAiPFgVbHZ8XAg==, tableContent=null), ArticleFig(id=1190330525412852519, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=CN, label=图2, caption=Pin1敲低对宫颈癌细胞成球性的影响

Pin1. 肽基脯氨酰顺反异构酶1;A. 成球实验观察球体细胞和贴壁细胞生长情况;B. 成球实验观察各组细胞球体形成情况

, figureFileSmall=IZ3a1LsMFtkjDXX6xhKOGw==, figureFileBig=HIZzQP+JsAiPFgVbHZ8XAg==, tableContent=null), ArticleFig(id=1190330525475767080, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=EN, label=Fig.3, caption=The effection of down-regulation of Pin1 expression on migration invasion and EMT of cervical cancer cells, figureFileSmall=tl265uTnOJlVjfAp+i/3pg==, figureFileBig=cV7lpM/YtKabbPqe2wnGPA==, tableContent=null), ArticleFig(id=1190330525547070249, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=CN, label=图3, caption=Pin1敲低对宫颈癌细胞迁移、侵袭能力及上皮-间质转化(EMT)的影响

Pin1. 肽基脯氨酰顺反异构酶1;E-cadherin. E-钙黏蛋白;N-cadherin. N-钙黏蛋白;A. Transwell迁移实验检测下调Pin1对宫颈癌细胞迁移能力的影响;B. Transwell侵袭实验检测下调Pin1对宫颈癌细胞侵袭能力的影响;C. Western blotting检测下调Pin1对宫颈癌细胞EMT相关蛋白表达的影响;D. qRT-PCR检测下调Pin1对宫颈癌细胞EMT相关mRNA表达的影响;**P<0.01,***P<0.001,****P<0.0001

, figureFileSmall=tl265uTnOJlVjfAp+i/3pg==, figureFileBig=cV7lpM/YtKabbPqe2wnGPA==, tableContent=null), ArticleFig(id=1190330525597401898, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=EN, label=Fig.4, caption=The effects of down-regulation of Pin1 on protein expression of c-Jun and c-Fos in cervical cancer cells, figureFileSmall=3YzM50m/IF/gvTqW0BS1Ww==, figureFileBig=rXXS94iMIvovjSGhZ2hy8w==, tableContent=null), ArticleFig(id=1190330525643539243, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=CN, label=图4, caption=下调Pin1对宫颈癌细胞c-Jun、c-Fos蛋白表达的影响

Pin1. 肽基脯氨酰顺反异构酶1;DAPI. 4',6-二脒基-2-苯基吲哚;IP. 免疫沉淀;IB. 免疫印迹;Input. 阳性对照;A. Western blotting检测下调Pin1后c-Jun、c-Fos蛋白的表达情况;B. qRT-PCR检测下调Pin1后c-Junc-Fos mRNA的表达情况;C. 免疫荧光实验观察Pin1与c-Jun的共定位情况;D. 免疫共沉淀实验检测Pin1与c-Jun的蛋白相互作用;**P<0.01,***P<0.001,****P<0.0001

, figureFileSmall=3YzM50m/IF/gvTqW0BS1Ww==, figureFileBig=rXXS94iMIvovjSGhZ2hy8w==, tableContent=null), ArticleFig(id=1190330525706453804, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=EN, label=Tab.1, caption=

Primer sequences for qRT-PCR

, figureFileSmall=null, figureFileBig=null, tableContent=
基因引物序列(5'-3')
Pin1正向:CTGCCTTCAGCAGAGGTCAGATC
反向:CAGTGCGGAGGATGATGTGGATG
SOX2正向:CTCCATGACCAGCTCGCAGA
反向:GGACTTGACCACCGAACCCA
ALDH1A1正向:GACAATGCTGTTGAATTTGCAC
反向:AAGGATATACTTCTTAGCCCGC
CD44正向:TCTGAATCAGATGGACACTCAC
反向:CATTGCCACTGTTGATCACTAG
c-Jun正向:CAAACCTCAGCAACTTCAACC
反向:CTGGGACTCCATGTCGATG
c-Fos正向:CTTCCCAGAAGAGATGTCTGTG
反向:TGGGAACAGGAAGTCATCAAAG
E-cadherin正向:GTATACCCTGGTGGTTCAG
反向:AAAATCCAAGCCCGTGGT
N-cadherin正向:TGTTCACTAAGCAGAAGGAAT
反向:GCTCACTGCTCTCATATTGTA
β-actin正向:TAGTTGCGTTACACCCTTTCTTG
反向:TCACCTTCACCGTTCCAGTTT
), ArticleFig(id=1190330525802922797, tenantId=1146029695717560320, journalId=1189873630562394117, articleId=1190310110359556906, language=CN, label=表1, caption=

qRT-PCR引物序列

, figureFileSmall=null, figureFileBig=null, tableContent=
基因引物序列(5'-3')
Pin1正向:CTGCCTTCAGCAGAGGTCAGATC
反向:CAGTGCGGAGGATGATGTGGATG
SOX2正向:CTCCATGACCAGCTCGCAGA
反向:GGACTTGACCACCGAACCCA
ALDH1A1正向:GACAATGCTGTTGAATTTGCAC
反向:AAGGATATACTTCTTAGCCCGC
CD44正向:TCTGAATCAGATGGACACTCAC
反向:CATTGCCACTGTTGATCACTAG
c-Jun正向:CAAACCTCAGCAACTTCAACC
反向:CTGGGACTCCATGTCGATG
c-Fos正向:CTTCCCAGAAGAGATGTCTGTG
反向:TGGGAACAGGAAGTCATCAAAG
E-cadherin正向:GTATACCCTGGTGGTTCAG
反向:AAAATCCAAGCCCGTGGT
N-cadherin正向:TGTTCACTAAGCAGAAGGAAT
反向:GCTCACTGCTCTCATATTGTA
β-actin正向:TAGTTGCGTTACACCCTTTCTTG
反向:TCACCTTCACCGTTCCAGTTT
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Pin1对宫颈癌细胞干性及诱导上皮-间质转化的作用及其分子机制
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海燕 1 , 尚香玉 2 , 马俊旗 3 , 阿仙姑·哈斯木 2, *
解放军医学杂志 | 基础研究 2025,50(5): 558-565
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解放军医学杂志 | 基础研究 2025, 50(5): 558-565
Pin1对宫颈癌细胞干性及诱导上皮-间质转化的作用及其分子机制
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海燕1, 尚香玉2, 马俊旗3, 阿仙姑·哈斯木2, *
作者信息
  • 1新疆医科大学第一附属医院病理科,新疆乌鲁木齐 830011
  • 2新疆医科大学基础医学院,新疆乌鲁木齐 830011
  • 3新疆医科大学第一附属医院妇科,新疆乌鲁木齐 830011
  • 海燕,硕士研究生,主要从事妇科肿瘤方面的研究

通讯作者:

阿仙姑·哈斯木,E-mail:
The effect of Pin1 on stemness-induced epithelial-mesenchymal transition in cervical cancer cells and its mechanism
Yan Hai1, Xiang-Yu Shang2, Jun-Qi Ma3, Hasim Ashamgul2, *
Affiliations
  • 1Department of Pathology, the First Affiliated Hospital of Xinjiang Medical University Urumqi, Xinjiang 830011, China
  • 2School of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830011, China
  • 3Department of Gynecology, the First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830011, China
出版时间: 2025-05-28 doi: 10.11855/j.issn.0577-7402.0149.2024.1219
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目的 探讨宫颈癌细胞中肽基脯氨酰顺反异构酶1(Pin1)介导肿瘤细胞干性的作用及诱导上皮-间质转化(EMT)的分子机制。方法 选取宫颈癌细胞系Siha(鳞状细胞癌)、Hela(腺癌)细胞,采用慢病毒转染技术构建Pin1低表达稳转细胞株,根据不同处理分为3组:敲低组1(shPin1-1)、敲低组2(shPin1-2)及对照组(shPin1-NON)。采用qRT-PCR及Western blotting检测敲低Pin1后宫颈癌细胞中性别决定区Y转录因子2(SOX2)、醛脱氢酶1A1(ALDH1A1)、细胞黏附分子44(CD44) mRNA及蛋白的表达情况。以无血清成球法诱导宫颈癌成球细胞,以贴壁培养宫颈癌细胞为对照,并采用qRT-PCR及Western blotting检测SOX2ALDH1A1CD44 mRNA及蛋白的表达情况进行验证。采用球体形成实验检测Pin1敲低后各组宫颈癌细胞的球体形成情况,Transwell检测各组细胞的迁移、侵袭能力,qRT-PCR及Western blotting检测各组细胞中上皮属性蛋白E-钙黏蛋白(E-cadherin)、间质属性蛋白N-钙黏蛋白(N-cadherin)以及激活蛋白1(AP-1)转录复合物关键蛋白(c-Junc-Fos) mRNA及蛋白的表达情况。采用免疫荧光结合免疫共沉淀实验检测Pin1与c-Jun的相互作用及共定位情况。结果 Siha和Hela细胞中,下调Pin1后shPin1-1组及shPin1-2组Pin1SOX2ALDH1A1CD44 mRNA及蛋白表达水平明显低于shPin1-NON组(P<0.05);无血清宫颈癌球体细胞中SOX2、ALDH1A1CD44 mRNA及蛋白表达水平明显高于宫颈癌贴壁细胞(P<0.05)。与shPin1-NON组比较,shPin1-1组、shPin1-2组细胞成球性及迁移、侵袭能力明显降低(P<0.05),E-cadherin mRNA及蛋白表达水平明显升高(P<0.05),而N-cadherin mRNA及蛋白表达水平明显降低(P<0.05);shPin1-1组及shPin1-2组c-Junc-Fos mRNA及蛋白表达水平明显低于shPin1-NON组(P<0.05)。结论 下调Pin1可抑制宫颈癌细胞的干性和迁移、侵袭能力,Pin1可能通过介导AP-1调控宫颈癌细胞干性诱导EMT的发生。

宫颈癌  /  肿瘤干细胞  /  NIMA互作肽基脯氨酰异构酶  /  上皮-间质转化

Objective To investigate the role of peptidyl prolyl cis-trans isomerase 1 (Pin1) in mediating stemness of tumor cells and the molecular mechanism of inducing epithelial-mesenchymal transition (EMT) in cervical cancer cells. Methods The Siha and Hele cells of Pin1 low-expression stable transfection uterine cervical neoplasm cell lines were constructed using lentivirus transfection technology and were divided into control group (shPin1-NON), knockdown group 1 (shPin1-1) and knockdown group 2 (shPin1-2). Western blotting and quantitative real-time polymerase chain reaction (qRT-PCR) were used to detect the expressions of Sex-determining region Y transcription factor 2 (SOX2), Aldehyde dehydrogenase 1A1 (ALDH1A1), and Cell adhesion molecule 44 (CD44). The serum-free spheroidization method was used to induce cervical cancer spheroids, with the adherent culture of cervical cancer cells as a control. Subsequently, Western blotting and qRT-PCR were employed to detect the expression of SOX2, ALDH1A1 and CD44 in both spheroid cells and adherent cells. Spheroid formation assay was used to detect the spheroid formation of cervical cancer cells after Pin1 knockdown. Transwell assay was used to detect the migration and invasion abilities of cervical cancer cells following down-regulation of Pin1. Western blotting and qRT-PCR were used to detect the expression of E-cadherin and N-cadherin attribute proteins in cervical cancer cells after transfection with pin1 low expression lentivirus. Western blotting and qRT-PCR were also used to assess the effects of Pin1 low expression on the expression levels of key proteins (c-Jun and c-Fos) of the transcriptional complex of Activator protein 1 (AP-1). Immunofluorescence combined with co-immunoprecipitation assays were conducted to detect the interaction and colocalization of Pin1 with c-Jun. Results In Siha and Hele cells, the mRNA and protein expression levels of Pin1, SOX2, ALDH1A1 and CD44 in shPin1-NON group were significantly higher than those in shPin1-1 group and shPin1-2 group (P<0.05). The expression levels of SOX2, ALDH1A1 and CD44 mRNA and protein in cervical cancer spheroid group were significantly higher than those in adherent cervical cancer cells (P<0.05). Compared with shPin1-NON group, the spheroidism and migration invasion abilities of shPin1-1 group and shPin1-2 group were significantly reduced (P<0.05). Compared with shPin1-NON group, the mRNA and protein expressions of E-cadherin in shPin1-1 and shPin1-2 groups were significantly increased (P<0.05), while the mRNA and protein expression levels of N-cadherin were significantly decreased (P<0.05). The mRNA and protein expression levels of c-Jun and c-Fos in shPin1-NON group were significantly higher than those in shPin1-1 group and shPin1-2 group (P<0.05). Conclusions Down-regulation of Pin1 can inhibit the stemness and migration invasion of cervical cancer cells, and Pin1 may mediate AP-1 to regulate the occurrence of stemness-induced epithelial-mesenchymal transition in cervical cancer cells.

uterine cervical neoplasms  /  neoplastic stem cells  /  NIMA-interacting peptidylprolyl isomerase  /  epithelial-mesenchymal transition
海燕, 尚香玉, 马俊旗, 阿仙姑·哈斯木. Pin1对宫颈癌细胞干性及诱导上皮-间质转化的作用及其分子机制. 解放军医学杂志, 2025 , 50 (5) : 558 -565 . DOI: 10.11855/j.issn.0577-7402.0149.2024.1219
Yan Hai, Xiang-Yu Shang, Jun-Qi Ma, Hasim Ashamgul. The effect of Pin1 on stemness-induced epithelial-mesenchymal transition in cervical cancer cells and its mechanism[J]. Medical Journal of Chinese People’s Liberation Army, 2025 , 50 (5) : 558 -565 . DOI: 10.11855/j.issn.0577-7402.0149.2024.1219
宫颈癌是常见的妇科恶性肿瘤,多数患者因发生转移或复发而死亡[1-2]。根据癌症干细胞(cancer stem cells,CSC)假说,CSC是唯一可形成新肿瘤及转移的亚群[3]。宫颈癌中的干细胞是通过高风险人乳头瘤病毒(high-risk human papillomavirus,HR-HPV)癌基因与细胞之间的相互作用转化而来,这些细胞的改变可导致肿瘤的发生发展[4]。蛋白质磷酸化是重要的信号调控机制,参与细胞周期调节、凋亡、发育、分化及增殖等过程[5]。肽基脯氨酰顺反异构酶1(peptidyl-prolyl cis/trans isomerase 1,Pin1)在多种肿瘤组织中高表达,介导磷酸化后蛋白质功能的调节,并可激活一系列致癌信号通路,不仅可调节上皮-间质转化(epithelial-mesenchymal transition,EMT),还可影响干细胞标志物的表达[6]。本课题组前期研究发现,Pin1在宫颈癌组织及细胞中呈高表达,且与宫颈癌细胞的侵袭、迁移相关[7-9]。因此,本研究选取宫颈癌细胞系Siha(鳞状细胞癌)、Hela(腺癌)细胞,通过慢病毒感染使Pin1稳定低表达,并检测与肿瘤干性相关的干细胞标志物的表达及干细胞球的形成能力,以探讨Pin1在宫颈癌干性维持中的作用,以期为宫颈癌的治疗提供新思路。
宫颈癌Siha、Hela细胞系购自武汉普诺赛生命科技有限公司,Pin1低表达慢病毒购自上海吉凯基因医学科技股份有限公司,Pin1抗体购自美国Abcam公司,性别决定区Y转录因子2(sex determining region Y-box 2,SOX2)、醛脱氢酶1A1(aldehyde dehydrogenas 1A1,ALDH1A1)、细胞黏附分子44(cluster of differentiation 44,CD44)、E-钙黏蛋白(E-cadherin)、N-钙黏蛋白(N-cadherin)、c-Jun(兔)、c-Fos、CoraLite594偶联的山羊抗兔IgG(H+L)[CoraLite594-conjugated Goat Anti-Rabbit IgG(H+L)](SA00013-4)及CoraLite488偶联的山羊抗小鼠IgG(H+L)[CoraLite488-conjugated Goat Anti-Mouse IgG(H+L)](SA00013-1)抗体购自美国Proteintech公司,c-Jun(鼠)抗体购自美国Santa Cruz Biotechnology公司,B27、BCA蛋白定量试剂盒购自美国Thermo公司。SDS-PAGE电泳装置购自美国Bio-Rad公司,磁力架购自美国Bimake公司。
Siha、Hela细胞培养于含90% DMEM(高糖)+10% FBS+1%青链霉素混合液的完全培养基中,置于37 ℃培养箱中培养。待细胞密度生长至80%~90%时,胰酶消化,收集细胞沉淀后PBS重悬并计数,将1×105个细胞铺于6孔板中,置于培养箱培养。培养12 h后,根据慢病毒说明书分别对Siha、Hela细胞进行转染,12 h后换液,72 h后置于荧光显微镜下观察转染效率。将细胞分为Pin1敲低组1(shPin1-1组)、Pin1敲低组2(shPin1-2组)及对照组(shPin1-NON组),其中shPin1-1组、shPin1-2组细胞分别转染两种敲低Pin1表达的慢病毒,而shPin1-NON组细胞转染空载慢病毒。
收集各组细胞沉淀,用1 ml含2% B27、20 ng/ml成纤维生长因子、20 ng/ml表皮生长因子、1%双抗溶液、DMEM/F12的无血清干细胞培养基重悬,加入含2 ml干细胞培养基的6孔板中,置于37 ℃培养箱中培养,每3 d加1 ml培养基。培养至第6天时,可见明显增大的肿瘤细胞球,当观察到球体中间致密发黑时,对球体细胞进行传代,采用第二代以上球体细胞进行后续实验。
收集各组细胞沉淀,加入适量细胞裂解液于冰上裂解30 min后,离心(15 000 r/min,4 ℃,15 min)收集上清,根据BCA蛋白定量试剂盒说明书测定各蛋白样品浓度。将蛋白样品进行电泳、转膜、封闭液封闭,加入一抗、二抗后采用化学发光成色仪曝光条带。
收集各组细胞沉淀,Trizol法提取RNA,取4 μl RNA样品,稀释100倍后采用微量分光光度计测定260 nm、280 nm处的吸光度值。采用反转录试剂盒将RNA样品反转录为cDNA。将cDNA、2× 核酸凝胶染液预混液、引物、无酶水配制成10 μl体系后行qRT-PCR检测。引物序列详见表1
将基底膜基质胶用基础培养基按照1:8的比例稀释后,取50 μl加入Transwell上室,置于培养箱4 h(迁移实验省略此步骤)。取出小室,将细胞悬液加入上室,下室加入600 μl完全培养基,置于培养箱24 h。取出小室,洗3次,加入4%多聚甲醛于下室中固定30 min。0.1%结晶紫溶液染色30 min。擦去小室底部细胞,将小室置于载玻片上,显微镜下观察并拍照,采用ImageJ软件统计细胞数量。
将细胞接种于激光共聚焦小皿中,待细胞密度至40%时取出。4%多聚甲醛固定1 h。分别于4 ℃加入0.5% Triton-100(15 min)、3% BSA溶液(30 min)、一抗(Pin1兔源、c-Jun鼠源)作用24 h,室温静置1 h,再加入二抗(CoraLite594偶联的山羊抗兔IgG及CoraLite488偶联的山羊抗小鼠IgG)孵育2 h,加入4',6-二脒基-2-苯基吲哚(4',6-diamidino-2-phenylindole,DAPI)10 min。共聚焦显微镜下随机选取5个视野拍照记录。
取200 μl蛋白样品于EP管内,加入相应体积的抗体,慢速晃动蛋白-抗体混合物过夜。将磁珠混悬液加入含150 μl结合缓冲液的EP管内,置于磁力架2 min后弃液,反复3次,将蛋白-抗体混合物加入其中,慢速晃动2 h。磁力架分离磁珠,弃上清,加入上样缓冲液。水浴锅加热蛋白样品(95 ℃,10 min)以游离抗原、抗体、磁珠,置于磁力架2 min,取上清液于新的EP管中,后续行Western blotting检测,实验步骤同1.2.3。
采用GraphPad Prism 8.0软件进行统计分析。所有数据均为计量资料且符合正态分布,以x±s表示,多组间比较采用单因素方差分析,进一步两两比较采用LSD-t检验。所有实验均独立重复3次。P<0.05为差异有统计学意义。
Western blotting检测结果显示,下调Pin1表达后shPin1-1组、shPin1-2组Siha、Hela细胞中Pin1表达水平明显低于shPin1-NON组(P<0.0001),且宫颈癌细胞干性标志物(SOX2、ALDH1A1、CD44)蛋白表达水平明显低于shPin1-NON组(P<0.05,图1A);qRT-PCR实验结果与Western blotting结果相似(图1B)。与贴壁培养的宫颈癌细胞相比,无血清成球培养法培养的宫颈癌球体细胞中干性标记物(SOX2、ALDH1A1、CD44)表达水平明显上调(P<0.01或P<0.0001,图1C);qRT-PCR实验结果与Western blotting结果相似(图1D)。
无血清成球法结果显示,Siha细胞可在无血清培养条件下呈球体形态生长(图2A);在Pin1低表达的Siha细胞中,与shPin1-NON组比较,shPin1-1组、shPin1-2组细胞成球性明显降低(P<0.05),Hela细胞中的结果与之一致(图2B)。
Transwell实验结果显示,在Siha细胞中,与shPin1-NON组比较,shPin1-1组、shPin1-2组迁移细胞数及入侵细胞数均明显减少(P<0.05),而shPin1-1组与shPin1-2组间差异无统计学意义(P>0.05)(图3A、B)。Western blotting检测结果显示,与shPin1-NON组比较,shPin1-1组及shPin1-2组Siha、Hela细胞中E-cadherin蛋白表达水平明显升高,而N-cadherin蛋白表达水平明显降低(P<0.01或P<0.0001,图3C);qRT-PCR实验结果与Western blotting结果一致(图3D)。
Western blotting检测结果显示,下调Pin1表达后shPin1-1组、shPin1-2组Siha、Hela细胞中c-Jun、c-Fos蛋白表达水平明显低于shPin1-NON组(P<0.05,图4A);qRT-PCR实验结果与Western blotting结果一致(图4B)。免疫荧光实验结果显示,在Siha及Hela宫颈癌细胞系中,Pin1与c-Jun均存在共表达区域(图4C)。免疫共沉淀实验结果显示,使用抗Pin1抗体沉淀的蛋白质中可检测到c-Jun蛋白,而在使用抗c-Jun抗体沉淀的蛋白质中可检测到Pin1蛋白(图4D)。
CSC与宫颈癌的起始、进展相关,且可能与转移及复发有关[10]。然而,宫颈癌中CSC的确切作用机制尚不清楚。CSC的超强自我更新和分化能力导致了其高致瘤性[11]。据报道,CSC对化疗[12]、放疗[13]及免疫疗法[14]的耐药性可能诱发其对肿瘤群体产生选择性压力。因此,靶向CSC的方法有望攻克宫颈肿瘤。CSC培养富集的方法较多,其中无血清成球法已广泛应用于CSC的研究中[15]。Pin1参与调节多种肿瘤细胞中磷酸化丝氨酸/苏氨酸-脯氨酸基序的构象转化,进而影响肿瘤驱动途径[16],而抑制Pin1被认为是一种有效的抗癌策略[17-18]。此外,有研究表明Pin1在乳腺癌、结肠癌及卵巢癌驱动CSC样细胞的过程中发挥了关键作用[19-21]。既往研究表明,在宫颈癌组织和细胞系中Pin1表达上调[7-9]。然而关于Pin1对宫颈癌中CSC样细胞的研究鲜有报道。本研究发现,在宫颈癌细胞中,下调Pin1的表达可抑制CSC标志物的表达,同时可降低肿瘤干细胞球的形成能力,抑制肿瘤细胞的侵袭及迁移能力,提示Pin1可能是宫颈癌临床干预的潜在靶点。
AP-1是一种二聚体转录因子复合物,主要由c-Jun及c-Fos组成,在CSC介导的肿瘤发生及侵袭性生长中发挥关键作用[22-26]。AP-1的组成型激活及过度表达可随宫颈癌的严重程度而变化[27]。本研究发现,下调Pin1可明显降低宫颈癌细胞中c-Jun及c-Fos的表达。既往研究表明,c-Jun是AP-1转录复合物的主要作用基因[28]。本研究通过免疫荧光共定位结合免疫共沉淀实验的方法明确了Pin1与c-Jun的相互作用关系,表明Pin1对宫颈癌干性的影响可能是通过激活AP-1转录复合物实现的。
此外有研究表明,在转移之前,肿瘤细胞可能具有涉及上皮基因转录抑制和间充质基因激活的EMT潜能,主要体现在上皮属性蛋白E-cadherin、β-catenin等表达下调,而间质细胞中相关蛋白波形蛋白(Vimentin)、基质金属蛋白酶(matrix metallo-proteinases,MMPs)、N-cadherin等的表达则上调[29]。在肿瘤组织中癌巢边缘发生EMT的单个癌细胞大多具有干细胞样特性[30],由此推测肿瘤组织中发生EMT表型的细胞可能是肿瘤干细胞[31]。本研究发现,敲低Pin1后宫颈癌细胞干性明显降低,且E-cadherin表达水平升高,N-cadherin表达水平降低。
综上所述,本研究选取了两种宫颈癌细胞株,以验证Pin1与宫颈癌细胞致瘤性及恶性进展的关系,结果发现,在宫颈癌中Pin1可能通过激活AP-1影响宫颈癌细胞的干细胞特性来诱导EMT,进而影响宫颈癌的发生进展,该结果有助于宫颈癌的靶向治疗研究。但本研究仅在体外细胞及蛋白水平进行分析,尚未对体内分子机制进行深入挖掘,未来可进行深入探讨,以加深Pin1对宫颈癌干性影响的具体分子作用机制的理解。
  • 国家自然科学基金(81960463)
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doi: 10.11855/j.issn.0577-7402.0149.2024.1219
  • 接收时间:2024-02-01
  • 首发时间:2025-10-29
  • 出版时间:2025-05-28
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  • 收稿日期:2024-02-01
  • 录用日期:2024-04-03
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National Natural Science Foundation of China(81960463)
国家自然科学基金(81960463)
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    1新疆医科大学第一附属医院病理科,新疆乌鲁木齐 830011
    2新疆医科大学基础医学院,新疆乌鲁木齐 830011
    3新疆医科大学第一附属医院妇科,新疆乌鲁木齐 830011

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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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