Article(id=1200394148382626217, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2024-0406, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1714147200000, receivedDateStr=2024-04-27, revisedDate=1715875200000, revisedDateStr=2024-05-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1764125867219, onlineDateStr=2025-11-26, pubDate=1720713600000, pubDateStr=2024-07-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764125867219, onlineIssueDateStr=2025-11-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764125867219, creator=13701087609, updateTime=1764125867219, updator=13701087609, issue=Issue{id=1200394147019477416, tenantId=1146029695717560320, journalId=1189982191388893191, year='2024', volume='59', issue='7', pageStart='1897', pageEnd='2182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764125866894, creator=13701087609, updateTime=1764225115484, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200810425920115296, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200810425920115297, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2020, endPage=2029, ext={EN=ArticleExt(id=1200394148747530669, articleId=1200394148382626217, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Cathepsin A maintains the characteristics of tumor stem cells and promotes the occurrence and development of triple-negative breast cancer, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
Triple-negative breast cancer (TNBC) is a subtype of breast cancer known for the poor prognosis due to its strong invasiveness, high recurrence rate, and lack of effective treatment. Therefore, there is an urgent need to find targeted therapy for TNBC. Cathepsin A (CTSA) is an acidic serine carboxypeptidase that is highly expressed in various tumor tissues. However, the role and molecular mechanism of CTSA in TNBC are still unclear. This study found that the expression of CTSA was upregulated, and the high expression of CTSA was positively correlated with the poor prognosis of TNBC. The results further showed that knocking down CTSA inhibited the proliferation, invasion, and colony formation of TNBC cells, improved drug sensitivity of cells, and inhibited the progression of TNBC. Mechanistically, CTSA inhibited the ubiquitination and degradation of the promyelocytic leukemia protein (PML) protein by blocking the interaction between PML and its E3 ubiquitin ligase RNF4, thus maintaining the stability of PML nuclear bodies (PML-NBs). The inhibitor of CTSA had a positive therapeutic effect on inhibiting the characteristics of TNBC stem cells. In conclusion, this study demonstrates that inhibiting CTSA to decrease the stability of PML protein may be a promising therapeutic strategy for TNBC. All animal experiments in this experiment were approved by the Ethics Committee of Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (approval number: IMB-20240326D502).
, correspAuthors=Ke LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2024 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, 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, authorCompany=null, fund=null, authors=null, authorsList=Jie WU, Ting-ting ZHANG, Ke LI), CN=ArticleExt(id=1200394150014210499, articleId=1200394148382626217, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=组织蛋白酶A维持肿瘤干细胞性状促进三阴性乳腺癌发生发展, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
三阴性乳腺癌(triple-negative breast cancer, TNBC) 侵袭性强、复发率高且缺乏有效的治疗方法, 是预后最差的乳腺癌亚型, 因此寻找针对TNBC的有效靶向疗法成为当务之急。组织蛋白酶A (cathepsin A, CTSA) 是一种酸性丝氨酸羧肽酶, 在多种肿瘤组织中高表达, 但是CTSA在TNBC中的作用及机制尚不明确。本研究发现CTSA在TNBC中表达上调, 高表达的CTSA与TNBC患者不良预后呈现正相关。实验结果进一步显示, 敲低CTSA抑制TNBC细胞的增殖、侵袭和克隆形成能力, 提高其药物敏感性, 抑制TNBC疾病进展。机制研究表明, CTSA通过阻碍早幼粒细胞白血病蛋白(promyelocytic leukemia protein, PML) 与其E3泛素连接酶RNF4相互作用, 抑制PML蛋白泛素化和降解, 进而维持PML核小体(PML nuclear bodies, PML-NBs) 结构稳定性。体外结果显示, CTSA抑制剂具有抑制TNBC干细胞性状的治疗效果。综上, 本研究表明抑制CTSA促进PML的降解可能作为TNBC的潜在治疗策略。本实验所有动物实验获得中国医学科学院医药生物技术研究所伦理委员会批准(批准号: IMB-20240326D502)。
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In vitro studies on cellular and molecular mechanisms of arsenic trioxide (As
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3 induces NB
4 cell apoptosis with downregulation of Bcl-2 expression and modulation of PML-RAR alpha/PML proteins [J]. Blood, 1996, 88: 1052-1061., articleTitle=null, refAbstract=null), Reference(id=1200470902451327425, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[51], rfOrder=50, authorNames=null, journalName=null, refType=null, unstructuredReference=Wang Y, Zhang Y, Yang L, et al. Arsenic trioxide induces the apoptosis of human breast cancer MCF-7 cells through activation of caspase-3 and inhibition of HERG channels [J]. Exp Ther Med, 2011, 2: 481-486., articleTitle=null, refAbstract=null)], funds=[Fund(id=1200470894863831951, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, awardId=2022YFA1106100, language=CN, fundingSource=国家重点研发计划(2022YFA1106100), fundOrder=null, country=null), Fund(id=1200470894989661078, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, awardId=82222070, language=CN, fundingSource=国家自然科学基金资助项目(82222070), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1200470890342371936, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, xref=null, ext=[AuthorCompanyExt(id=1200470890350760544, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, companyId=1200470890342371936, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China), AuthorCompanyExt(id=1200470890354954849, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, companyId=1200470890342371936, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国医学科学院、北京协和医学院医药生物技术研究所, 北京 100050)])], figs=[ArticleFig(id=1200470893269996322, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=EN, label=null, caption=null, figureFileSmall=L3AwNHS+SJOabw2Q5VKHMg==, figureFileBig=Z8kuWTxlNWCKE1reb2XTAg==, tableContent=null), ArticleFig(id=1200470893400019753, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=CN, label=Figure 1, caption=
The subtype-specific high expression of cathepsin A (CTSA) in triple-negative breast cancer (TNBC). A: Immunohistochemistry (IHC) analysis revealed the expression of CTSA in the tumor tissue and normal tissue of breast cancer (BC) patients (n = 30). Scale bar, 40 µm; B: The GEPIA database showed expression of CTSA in normal and different subtypes of BC patients; C: Western blot validation of CTSA expression in different subtypes of BC cells; D-G: Kaplan-Meier survival curves stratified by CTSA expression were generated for different subtypes of BC patients. In A, statistical significance between two groups was determined with two-tailed student's t test. In B and C, statistical significance among groups was determined by one-way ANOVA. In D to G, statistical significance was determined with log-rank test. Mean ± SEM. *P < 0.05 ****P < 0.000 1 , figureFileSmall=L3AwNHS+SJOabw2Q5VKHMg==, figureFileBig=Z8kuWTxlNWCKE1reb2XTAg==, tableContent=null), ArticleFig(id=1200470893785895740, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=EN, label=null, caption=null, figureFileSmall=82BrW657PwJkILDrMbLwRg==, figureFileBig=xmC4IonC7g/3VTne9Rwj4A==, tableContent=null), ArticleFig(id=1200470894045942599, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=CN, label=Figure 2, caption=
CTSA promotes development and progression of TNBC by supporting cancer stem cell traits. A: The relative viability of MDA-MB-231 and MDA-MB-468 cells was measured by a CCK-8 assay at the indicated times (n = 4); B: Representative images and quantification of the invasion assay results for MDA-MB-231 and MDA-MB-468 cells transduced with shNTC, shCTSA1, and shCTSA2 are shown. Scale bar, 40 μm; C: Quantification of tumor spheres formed by MDA-MB-231 and MDA-MB-468 cells with shNTC and shCTSA; D, E: The effect of shCTSA on Taxol and doxorubicin (Dox) sensitivity in MDA-MB-231 and MDA-MB-468 cells. The data are a summary of the IC50 values for Taxol and Dox in the shCTSA cell lines (n = 4); F: Effects of CTSA on tumor formation from transplanted MDA-MB-231 and MDA-MB-468 cells with shNTC and shCTSA in nude mice were examined (n = 6). Images of tumors are provided; G, H: Effects of CTSA deletion on tumor growth (G) and weight (H) in nude mice; I: 5-Ethynyl-2'-deoxyuridine (EDU) in tumor were evaluated by immunofluorescence analysis (IF). Scale bar, 30 μm; J: IHC analysis revealed the expression of MMP-9 in the shNTC and shCTSA tumor tissue. Scale bar, 40 µm; K: Effects of CTSA on the tumor incidence. In A to E, statistical significance among groups was determined by one-way ANOVA. In F to J, statistical significance between two groups was determined by two-tailed student's t test. In K, the P value was obtained by Pearson's χ2 test using extreme limiting dilution analysis (ELDA) software. Mean ± SEM. ***P < 0.001, ****P < 0.000 1 , figureFileSmall=82BrW657PwJkILDrMbLwRg==, figureFileBig=xmC4IonC7g/3VTne9Rwj4A==, tableContent=null), ArticleFig(id=1200470894234686291, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=EN, label=null, caption=null, figureFileSmall=WE+XWA48ZSkVZB36/AzuKA==, figureFileBig=grhKHNmAaodYjEHnK4f90w==, tableContent=null), ArticleFig(id=1200470894364709730, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=CN, label=Figure 3, caption=
CTSA maintains protein stability by blocking RNF4-mediated ubiquitination degradation of PML. A: Gene set enrichment analysis (GSEA) was performed to identify the pathways of CTSA target genes. All gene sets showed a positive normalized enrichment score (NES) and false discovery rate (FDR) q-values of less than 0.25; B: The mRNA levels of CTSA and PML were analyzed by reverse transcription quantitative PCR (RT-qPCR) in shCTSA and shNTC MDA-MB-231 cells; C: Western blot validation of CTSA, PML, HIF-1α, and MYC expression in shCTSA, and shNTC MDA-MB-231 cells; D: The effect of CTSA on PML ubiquitylation in vivo was assessed in HEK 293T cells; E: Effect of CTSA on PML degradation was investigated in HEK 293T cells treated with cycloheximide (CHX, 10 μg·mL-1). The PML relative quantification is shown; F, G: The interaction between CTSA and PML in HEK 293T cells (F) and MDA-MB-231 cells (G) was evaluated with CO-IP assay; H: PML-NBs in MDA-MB-231 cells was evaluated by IF. Scale bar, 5 μm; I: The interaction of RNF4 and PML was evaluated with CO-IP assay; J: The effect of CTSA and RNF4 on PML ubiquitylation in vivo; K: Effect of CTSA and RNF4 on PML degradation in HEK 293T cells tread with CHX (10 μg·mL-1). The PML relative quantification is shown. In A and E, statistical significance among groups was determined by one-way ANOVA. In F to H, Statistical significance between two groups was determined by two-tailed student's t test. In B, C, H, and K, statistical significance among groups was determined by one-way ANOVA. Mean ± SEM. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.000 1 , figureFileSmall=WE+XWA48ZSkVZB36/AzuKA==, figureFileBig=grhKHNmAaodYjEHnK4f90w==, tableContent=null), ArticleFig(id=1200470894507316077, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=EN, label=null, caption=null, figureFileSmall=k01ibD/sK0O9eqqGtWiVEw==, figureFileBig=Ls9nemy29X/Pq7P4oES2eg==, tableContent=null), ArticleFig(id=1200470894607979384, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394148382626217, language=CN, label=Figure 4, caption=
Effect of lactacystin and As2O3 on the expression of PML and cancer stem cell traits of TNBC cells. A, B: Western blot validation of CTSA and PML expression by lactacystin with different concentrations (A) and time (B); C: Western blot validation of CTSA, PML, HIF-1α, and MYC expression by As2O3 (5 µmol·L-1) and lactacystin (10 µmol·L-1); D: PML-NBs in MDA-MB-231 cells was evaluated by IF analysis, scale bar, 5 μm; E: Relative viability of MDA-MB-231 cells with As2O3 (5 µmol·L-1) and lactacystin (10 µmol·L-1) was measured by a CCK-8 assay at different time; F: Representative images and quantification of the invasion assay results for MDA-MB-231 cells treated with As2O3 (5 µmol·L-1) and lactacystin (10 µmol·L-1); G: Quantification of tumorspheres treated with As2O3 (5 µmol·L-1) and lactacystin (10 µmol·L-1). Scale bar, 40 μm. In A to G, statistical significance among groups was determined by one-way ANOVA. 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