Article(id=1308841244382556846, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308841198224240856, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2025-1355, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1762963200000, receivedDateStr=2025-11-13, revisedDate=1768924800000, revisedDateStr=2026-01-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1789981669754, onlineDateStr=2026-09-21, pubDate=1781193600000, pubDateStr=2026-06-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789981669754, onlineIssueDateStr=2026-09-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789981669754, creator=13701087609, updateTime=1789981669754, updator=13701087609, issue=Issue{id=1308841198224240856, tenantId=1146029695717560320, journalId=1189982191388893191, year='2026', volume='61', issue='6', pageStart='1881', pageEnd='2376', issueExtLink='null', onlineDate='null', pubDate='1781193600000', pubDateStr='2026-06-12', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789981658750, creator='13701087609', updateTime=1789984187230, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308851803500933401, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308841198224240856, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308851803500933402, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308841198224240856, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=2172, endPage=2179, ext={EN=ArticleExt(id=1308841245028479664, articleId=1308841244382556846, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=The effect and mechanism of 19-hydroxycytochalasin B from marine fungus inhibited bladder cancer cells growth, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=

Bladder cancer has a high incidence and mortality rate worldwide. Existing treatment methods often face the challenges, such as drug resistance, recurrence and metastasis. These challenges drive our effect to explore new therapeutic compounds. 19-Hydroxycytochalasin B (19-HCB) is a new cytochalasin isolated from marine fungus. Previous studies have confirmed that its structural analogues have good anti-tumor activity, but the anti-tumor activity and mechanism of 19-HCB remain unclear. This study aims to evaluate the in vitro anti-tumor activity of 19-HCB and explore the mechanism of its action in human bladder cancer J82 cells. The anti-tumor activity was comprehensively evaluated through analyzing cell growth by MTT assay, cell scratch assay, high-content imaging and flow cytometry, colony formation and other experiments. The results showed that 19-HCB exhibited the strongest proliferative inhibitory activity (IC50 = 0.59 μmol·L-1) against bladder cancer J82 cells and could significantly inhibit the migration of J82 cells. Its mechanism of action is closely related to inducing apoptosis, manifested as the upregulation of pro-apoptotic proteins BIM and BAX and the down-regulation of anti-apoptotic protein survivin. Meanwhile, the expression of cell cycle regulatory protein p21 is upregulated while that of CDK1 is downregulated. Additionally, 19-HCB can also inhibit the AKT signaling pathway. In summary, 19-HCB exerts anti-bladder cancer effects by inducing apoptosis, inhibiting migration and regulating multiple key signaling pathways, and is a candidate drug lead compound with development potential.

, authors=Ju TANG1, 2, Xue-yi HU3, Chen-yin WANG2, Xin LI3, Ling-hong MENG3, Yong-ping ZHANG1, *, Shu-yi SI2, *, authorsList=Ju TANG, Xue-yi HU, Chen-yin WANG, Xin LI, Ling-hong MENG, Yong-ping ZHANG, Shu-yi SI, authorCompany=null, correspAuthors=Yong-ping ZHANG, Shu-yi SI, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 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, fund=null), CN=ArticleExt(id=1308841248333591232, articleId=1308841244382556846, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=海洋真菌来源细胞松弛素19-hydroxycytochalasin B对膀胱癌细胞生长的抑制作用及其机制研究, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=

膀胱癌在全球具有较高的发病率与死亡率, 现有治疗手段常面临耐药、复发和转移等诸多挑战, 因此驱动着对于新型治疗化合物的持续性探索。19-Hydroxycytochalasin B (19-HCB) 是一种海洋真菌来源的细胞松弛素, 已有研究证实其结构类似物具有较好的抗肿瘤活性, 但其抗肿瘤机制尚不明确。本研究旨在评估19-HCB的体外抗肿瘤活性, 并以人膀胱癌J82细胞为模型探讨其作用机制。采用MTT法、细胞划痕实验、高内涵成像与流式细胞术、克隆形成、RT-qPCR和Western blot实验等综合评估其抗肿瘤活性和机制。结果显示, 19-HCB对膀胱癌J82细胞表现出最强的增殖抑制活性(IC50 = 0.59 μmol·L-1), 并能显著性抑制J82细胞的迁移。进一步研究作用机制显示, 与诱导细胞凋亡密切相关, 表现为促凋亡蛋白BIM、BAX上调和抗凋亡蛋白survivin下调; 同时, 细胞周期调控蛋白p21表达上调, 而CDK1表达下调, 此外, 19-HCB还能抑制AKT信号通路传导。总之, 19-HCB通过诱导凋亡、抑制迁移并调控多条关键信号通路, 从而发挥抗膀胱癌作用, 是一种具有开发潜力的候选药物先导化合物。

, authors=唐举1, 2, 胡雪怡3, 王晨吟2, 李鑫3, 孟令红3, 张永萍1, *, 司书毅2, *, authorsList=唐举, 胡雪怡, 王晨吟, 李鑫, 孟令红, 张永萍, 司书毅, authorCompany=null, correspAuthors=张永萍, 司书毅, authorNote=

#

共同第一作者.

作者贡献:

唐举与胡雪怡为本文共同第一作者, 唐举负责实验方案实施、数据处理、文章撰写; 胡雪怡负责化合物的发现、分离纯化与鉴定; 王晨吟负责实验方案设计、指导实验、文章修改; 李鑫、孟令红负责部分实验方案实施; 张永萍、司书毅负责课题设计、实验及论文指导。

, correspAuthorsNote=
张永萍,Tel: 13985171981, E-mail:
司书毅,Tel: 86-10-63180604, E-mail:
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GeneSequence (5'-3')
β-ActinF: CACCATTGGCAATGAGCGGTTC
R: AGGTCTTTGCGGATGTCCACGT
BIMF: TCCGATTTAGTTCCACTCTGC
R: TTCCTTTTACATGCCTGGTG
BAXF: CCCGAGAGGTCTTTTTCCGAG
R: CCAGCCCATGATGGTTCTGAT
p21F: CGATGGAACTTCGACTTTGTCA
R: GCACAAGGGTACAAGACAGTG
BRIC5F: AGGACCACCGCATCTCTACAT
R: AAGTCTGGCTCGTTCTCAGTG
), ArticleFig(id=1308841254792819464, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308841244382556846, language=CN, label=Tab.1, caption=

Primer sequences of RT-qPCR. BIM: Bcl-2 interacting mediator of cell death; BAX: Bcl-2 associated X protein; p21: Cyclin-dependent kinase inhibitor 1A; BRIC5: Baculoviral IAP repeat containing 5

, figureFileSmall=null, figureFileBig=null, tableContent=
GeneSequence (5'-3')
β-ActinF: CACCATTGGCAATGAGCGGTTC
R: AGGTCTTTGCGGATGTCCACGT
BIMF: TCCGATTTAGTTCCACTCTGC
R: TTCCTTTTACATGCCTGGTG
BAXF: CCCGAGAGGTCTTTTTCCGAG
R: CCAGCCCATGATGGTTCTGAT
p21F: CGATGGAACTTCGACTTTGTCA
R: GCACAAGGGTACAAGACAGTG
BRIC5F: AGGACCACCGCATCTCTACAT
R: AAGTCTGGCTCGTTCTCAGTG
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海洋真菌来源细胞松弛素19-hydroxycytochalasin B对膀胱癌细胞生长的抑制作用及其机制研究
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唐举 1, 2 , 胡雪怡 3 , 王晨吟 2 , 李鑫 3 , 孟令红 3 , 张永萍 1, * , 司书毅 2, *
药学学报 | 研究论文 2026,61(6): 2172-2179
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药学学报 |研究论文 2026 , 61 (6) : 2172 -2179
海洋真菌来源细胞松弛素19-hydroxycytochalasin B对膀胱癌细胞生长的抑制作用及其机制研究
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唐举1, 2, 胡雪怡3, 王晨吟2, 李鑫3, 孟令红3, 张永萍1, * , 司书毅2, *
作者信息
  • 1贵州中医药大学药学院, 贵州 贵阳 550025
  • 2中国医学科学院 北京协和医学院, 医药生物技术研究所, 国家新药(微生物)筛选实验室, 国家卫生健康委员会抗生素生物工程重点实验室, 北京 100050
  • 3中国科学院海洋研究所实验海洋生物学实验室, 山东 青岛 266071
通讯作者:
张永萍,Tel: 13985171981, E-mail:
司书毅,Tel: 86-10-63180604, E-mail:
作者简介:

#

共同第一作者.

作者贡献:

唐举与胡雪怡为本文共同第一作者, 唐举负责实验方案实施、数据处理、文章撰写; 胡雪怡负责化合物的发现、分离纯化与鉴定; 王晨吟负责实验方案设计、指导实验、文章修改; 李鑫、孟令红负责部分实验方案实施; 张永萍、司书毅负责课题设计、实验及论文指导。

The effect and mechanism of 19-hydroxycytochalasin B from marine fungus inhibited bladder cancer cells growth
Ju TANG1, 2, Xue-yi HU3, Chen-yin WANG2, Xin LI3, Ling-hong MENG3, Yong-ping ZHANG1, * , Shu-yi SI2, *
Affiliations
  • 1School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
  • 2National Screening Laboratory for New Microbial Drugs, Key Laboratory of Antibiotic Bioengineering of the National Health Commission, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
  • 3Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
出版时间: 2026-06-12 doi: 10.16438/j.0513-4870.2025-1355
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膀胱癌在全球具有较高的发病率与死亡率, 现有治疗手段常面临耐药、复发和转移等诸多挑战, 因此驱动着对于新型治疗化合物的持续性探索。19-Hydroxycytochalasin B (19-HCB) 是一种海洋真菌来源的细胞松弛素, 已有研究证实其结构类似物具有较好的抗肿瘤活性, 但其抗肿瘤机制尚不明确。本研究旨在评估19-HCB的体外抗肿瘤活性, 并以人膀胱癌J82细胞为模型探讨其作用机制。采用MTT法、细胞划痕实验、高内涵成像与流式细胞术、克隆形成、RT-qPCR和Western blot实验等综合评估其抗肿瘤活性和机制。结果显示, 19-HCB对膀胱癌J82细胞表现出最强的增殖抑制活性(IC50 = 0.59 μmol·L-1), 并能显著性抑制J82细胞的迁移。进一步研究作用机制显示, 与诱导细胞凋亡密切相关, 表现为促凋亡蛋白BIM、BAX上调和抗凋亡蛋白survivin下调; 同时, 细胞周期调控蛋白p21表达上调, 而CDK1表达下调, 此外, 19-HCB还能抑制AKT信号通路传导。总之, 19-HCB通过诱导凋亡、抑制迁移并调控多条关键信号通路, 从而发挥抗膀胱癌作用, 是一种具有开发潜力的候选药物先导化合物。

海洋真菌  /  次级代谢产物  /  膀胱癌  /  细胞凋亡  /  机制研究

Bladder cancer has a high incidence and mortality rate worldwide. Existing treatment methods often face the challenges, such as drug resistance, recurrence and metastasis. These challenges drive our effect to explore new therapeutic compounds. 19-Hydroxycytochalasin B (19-HCB) is a new cytochalasin isolated from marine fungus. Previous studies have confirmed that its structural analogues have good anti-tumor activity, but the anti-tumor activity and mechanism of 19-HCB remain unclear. This study aims to evaluate the in vitro anti-tumor activity of 19-HCB and explore the mechanism of its action in human bladder cancer J82 cells. The anti-tumor activity was comprehensively evaluated through analyzing cell growth by MTT assay, cell scratch assay, high-content imaging and flow cytometry, colony formation and other experiments. The results showed that 19-HCB exhibited the strongest proliferative inhibitory activity (IC50 = 0.59 μmol·L-1) against bladder cancer J82 cells and could significantly inhibit the migration of J82 cells. Its mechanism of action is closely related to inducing apoptosis, manifested as the upregulation of pro-apoptotic proteins BIM and BAX and the down-regulation of anti-apoptotic protein survivin. Meanwhile, the expression of cell cycle regulatory protein p21 is upregulated while that of CDK1 is downregulated. Additionally, 19-HCB can also inhibit the AKT signaling pathway. In summary, 19-HCB exerts anti-bladder cancer effects by inducing apoptosis, inhibiting migration and regulating multiple key signaling pathways, and is a candidate drug lead compound with development potential.

marine fungus  /  secondary metabolites  /  bladder cancer  /  apoptosis  /  mechanism research
唐举, 胡雪怡, 王晨吟, 李鑫, 孟令红, 张永萍, 司书毅. 海洋真菌来源细胞松弛素19-hydroxycytochalasin B对膀胱癌细胞生长的抑制作用及其机制研究. 药学学报, 2026 , 61 (6) : 2172 -2179 . DOI: 10.16438/j.0513-4870.2025-1355
Ju TANG, Xue-yi HU, Chen-yin WANG, Xin LI, Ling-hong MENG, Yong-ping ZHANG, Shu-yi SI. The effect and mechanism of 19-hydroxycytochalasin B from marine fungus inhibited bladder cancer cells growth[J]. Acta Pharmaceutica Sinica, 2026 , 61 (6) : 2172 -2179 . DOI: 10.16438/j.0513-4870.2025-1355
膀胱癌是泌尿系统最常见的恶性肿瘤之一, 全球每年约有573 278人新诊断为膀胱癌[1, 2], 根据世界卫生组织的预测, 到2040年, 这一数字预计将翻一倍。该病在男性中发病率远高于女性, 在男性恶性肿瘤发病率中排名第六[3]。膀胱癌根据肿瘤浸润深度的不同, 通常被分为非肌层浸润性膀胱癌(non-muscle-invasive bladder cancer, NMIBC) 和肌层浸润性膀胱癌(muscle-invasive bladder cancer, MIBC)[3], 高度的异质性使其在临床治疗中面临巨大挑战。因此, 探寻新型高效的抗膀胱癌药物具有重要的临床意义。对于NMIBC, 核心是膀胱灌注治疗。卡介苗(BCG) 是高危患者的免疫治疗金标准[4], 能有效预防复发和进展; 丝裂霉素C等化疗药物则常用于中危患者或术后即刻灌注[5]。对于MIBC和转移性膀胱癌, 以全身治疗为主[6]。近年来, 治疗格局被彻底改变: 免疫治疗: PD-1/L1抑制剂用于不耐受化疗或化疗后的患者[7]。靶向治疗: 针对特定基因突变(如FGFR) 的抑制剂为精准医疗带来突破[8]。抗体药物偶联物: 针对nectin-4、TROP-2、HER2等靶点的新药疗效显著[9], 成为后线治疗的重要选择。
研究发现, 从海洋真菌的次级代谢产物中发现的一系列活性分子, 初步研究发现这些化合物具有细胞毒性[10]、抗菌[10]、抗寄生虫[11]和抗病毒特性[12]。抗肿瘤活性研究发现, 细胞松弛素及其衍生物对多种肿瘤细胞系表现出显著的抑制作用[13], 这表明该类化合物在抗肿瘤活性方面具有巨大潜力。19-Hydroxycytochalasin B (19-HCB, 图1) 是从海洋内生真菌Curvularia verruculosa CS-129分离得到的活性化合物, 通过高分辨电喷雾电离质谱(HRESIMS) 正离子模式数据确定其化学式为C29H37NO6。抗菌活性方面, 该化合物对水生病原菌爱德华氏菌(Edwardisella ictaluri) 表现出抑制活性[14], 最小抑菌浓度(MIC) 值为8 μg·mL-1; 抗肿瘤活性方面, 19-HCB对HCT-116、肝癌细胞HepG-2和乳腺癌细胞MCF-7表现出突出的细胞毒性[14]。实验室前期将海洋内生真菌Curvularia verruculosa CS-129经固体大米培养基大规模发酵后, 使用乙酸乙酯对发酵物进行充分提取, 所得提取液经浓缩后得到粗提物。进一步将粗提物分离纯化后得到高纯度的19-HCB。本研究通过MTT细胞活力检测、细胞划痕、细胞凋亡检测以及Western blot等实验方法, 旨在探索19-HCB的抗膀胱癌肿瘤活性与潜在机制。
仪器与试剂  化合物19-HCB由实验室前期自主分离纯化得到, 纯度为99.0%; 细胞恒温培养箱(HERAcell vios 160i, 德国Thermo公司); 酶标仪(SpectraMax ID3s, 美国Molecular Devices公司); 实时荧光定量检测PCR仪(LightCycler 480, 瑞士Roche公司); 离心机(10020, 德国Sigma公司); DMEM高糖培养基(SH30243.01)、青霉素-链霉素双抗(SV30010)、PBS缓冲液(C7033)、0.25%胰蛋白酶-EDTA消化液(SH30042.01), Cytiva公司; 噻唑蓝(M8180, Solarbio公司); BCA蛋白浓度检测试剂盒、DMSO (S24295-500 mL, 上海源叶生物科技有限公司); Annexin V-FITC/PI凋亡检测试剂盒(C1062L)、0.1%结晶紫染色液(S0053-1)、RIPA裂解液(P0093-100 mL), Beyotime公司; 4%多聚甲醛固定液(BL539A, Biosharp公司); QIAzol试剂(79306, QINGEN公司); 特异性引物(Songon Biotech公司)、蛋白酶抑制剂(1862209, Thermo公司)。
细胞培养  人膀胱癌细胞J82、结直肠癌细胞HCT-116、肝癌细胞HepG-2、乳腺癌细胞MCF-7使用含10%胎牛血清和1%青霉素-链霉素双抗的DMEM高糖培养基, 在37 ℃、5% CO2饱和湿度的恒温培养箱中进行常规培养。当细胞生长至70%~80%汇合度时进行传代, 弃去旧培养基, 用PBS缓冲液清洗细胞一次, 加入1 mL 0.25%胰蛋白酶-EDTA消化液, 于37 ℃培养箱中消化约1~2 min。立即加入含血清的完全培养基终止消化, 吹打培养瓶壁以获得单细胞悬液。
MTT细胞活力检测与细胞的筛选  将上述培养的细胞分别接种到96孔板中后, 置于37 ℃、5% CO2的细胞培养箱中培养24 h, 使细胞充分贴壁。加入不同浓度梯度的化合物19-HCB (10、100、316 nmol·L-1、1、3.16、10、31.6、100 μmol·L-1), 每个浓度设置3个复孔, 继续培养72 h; 药物处理结束后, 每孔加入3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐溶液(MTT, 5 mg·mL-1) 25 μL, 继续培养40 min后加入DMSO, 在570 nm波长下检测各孔的吸光度值。选取细胞活力影响最显著的细胞进行进一步的研究。
细胞迁移检测实验  取处于对数生长期的J82细胞, 以3×105个/孔的密度接种于6孔板中, 当细胞密度达到95%左右时, 用200 μL无菌移液枪头制造划痕, PBS清洗细胞碎片后将培养基更换为含1% FBS的培养基, 不同组别加入对应浓度的19-HCB, 随后将细胞置于37 ℃、5% CO2培养箱中培养, 期间分别在划痕后的0、24、48 h对细胞的划痕愈合情况进行记录。使用Image J软件对图像进行分析量化。
高内涵细胞凋亡检测实验(Annexin V)  取对数生长期的J82细胞接种于96孔板, 不同药物浓度(0、0.1、1、10 μmol·L-1) 处理72 h, 除去孔内培养基, PBS轻柔漂洗细胞两次。随后, 每孔加入100 μL配制好的染色工作液[含Annexin V-异硫氰酸荧光素(FITC) 和碘化丙啶(propidium Iodide, PI)]。将培养板置于室温下避光孵育15 min。为便于细胞核识别和计数, 在孵育结束前5 min, 每孔加入Hoechst 33342进行细胞核复染。孵育结束后, 使用高内涵成像系统进行图像采集。软件自动统计每孔中各类细胞的数目和比例。细胞凋亡率以(早期凋亡细胞数+ 晚期凋亡细胞数)/总细胞数× 100%表示。所有实验独立重复3次, 数据以均值±标准差表示。采用GraphPad Prism 9.0软件进行单因素方差分析, P < 0.05认为差异具有统计学意义。
细胞凋亡检测(Annexin V-FITC/PI流式细胞术)  取对数生长期的J82细胞, 以1×105个/孔密度接种于6孔板, 将其分为对照组和19-HCB给药低、中、高剂量组(5、10、20 μmol·L-1) 进行给药处理72 h。给药结束后收集细胞, 使用Annexin V-FITC/PI凋亡检测试剂盒进行染色, 染色完成通过流式细胞仪进行检测, 随后使用Flow Jo对数据进行分析。
平板克隆形成实验  将J82细胞接种至6孔板(1×103个/孔), 不同组别各自给药72 h后, 去除药物, 更换新鲜培养基, 连续培养14 d后可见对照组形成肉眼可见的细胞集落, 去除培养基用PBS洗两遍, 4%多聚甲醛固定, 0.1%结晶紫溶液染色15 min, PBS清洗, 自然风干, 拍照后使用Image J计算细胞集落形成数。
Transwell细胞侵袭实验  提前将无血清培养基稀释的Matrigel胶均匀铺于Transwell小室(8.0 μm孔径) 的上室面, 置于37 ℃培养箱中聚合1 h形成凝胶屏障; 收集已完成给药的细胞, 用无血清培养基调整每毫升细胞数至5×105个, 在Transwell下室加入500 μL含10%胎牛血清的完全培养基作为趋化诱导剂, 然后向上室加入200 μL细胞悬液(即1×105个细胞), 于37 ℃、5% CO2培养箱中孵育48 h; 孵育结束后取出小室, 弃去培养液, 用PBS清洗, 4%多聚甲醛室温固定20 min, 0.1%结晶紫染色15 min, 用湿棉签轻轻擦除上室膜内表面未侵袭细胞, 将小室风干后倒置于显微镜下随机选取5个不重叠视野对穿透基质胶和膜的下表面细胞进行计数。
实时定量逆转录PCR (RT-qPCR)  J82细胞72 h给药处理完成后, 收集细胞, 使用TRIzol法提取各组细胞总RNA。经逆转录合成cDNA, 按照qPCR试剂盒配置反应体系, 以人源β-actin作为内参基因进行实时荧光定量PCR检测, 采用2-ΔΔCt相对定量法计算目的基因mRNA的相对表达水平, 引物序列详见表1。
Western blot检测相关蛋白的表达  将完成给药的各组细胞收集, 分别提取总蛋白。各组加入RIPA裂解液和蛋白酶抑制剂(100∶1), 冰上裂解30 min后, 4 ℃、12 000 ×g离心15 min, 收集上清, BCA试剂盒检测各组蛋白浓度, 蛋白样品与4×loading buffer混合后, 100 ℃金属浴加热10 min使蛋白变性。经10% SDS-PAGE凝胶电泳分离蛋白, 初始电压为80 V (浓缩胶), 待溴酚蓝进入分离胶后, 将电压改为120 V, 直至溴酚蓝到达凝胶底部, 随后转至PVDF膜。用5%脱脂牛奶封闭2 h, 加入一抗孵育过夜, 次日回收一抗, 洗膜后使用二抗孵育1 h, 再次充分洗膜后曝光显影。
统计学分析  本研究中的所有定量实验均至少独立重复3次, 实验数据以均值±标准差(x±s)表示。Flow Jo用于流式数据分析, Image J用于量化蛋白条带灰度值、克隆形成数和细胞划痕面积, GraphPad Prism 9用于统计学分析及图表绘制; 两组间比较采用非配对t检验(unpaired two-tailed student's t-test)。多组间比较采用单因素方差分析(one-way ANOVA)。P < 0.05认为差异具有统计学意义。
以MTT方法分析, 结果显示, 19-HCB对J82、HCT-116、HepG-2、MCF-7细胞的IC50值分别为(0.59 ± 0.08)、(9.51 ± 1.86)、(6.40 ± 1.33)、(6.04 ± 2.23) μmol·L-1 (图2); 由此可见, 化合物19-HCB对膀胱癌细胞J82活性具有较为显著的抑制作用。
细胞划痕实验结果显示(图3), 对照组、19-HCB高剂量组、中剂量组、低剂量组在24 h时的细胞迁移率分别为(53.78 ± 2.69)%、(34.16 ± 1.70)%、(29.89 ± 1.68)%、(14.36 ± 3.00)%; 在48 h时的细胞迁移率分别为(72.35 ± 2.78)%、(42.93 ± 1.39)%、(34.29 ± 2.13)%、(22.72 ± 2.08)%; 各给药组相较于对照组细胞迁移率均显著下降, 且各组相对于对照组均具有统计学差异(P < 0.001)。
以高内涵细胞分析仪检测显示, 19-HCB促进癌细胞凋亡。结果显示(图4A、B), 各组Annexin阳性细胞的占比分别为(3.00 ± 0.48)%、(4.29 ± 1.93)%、(10.23 ± 3.49)%、(71.32 ± 9.74)%; 10 μmol·L-1与对照组相比均存在极显著差异(P < 0.000 1)。流式细胞术结果显示(图4C、D), 对照组、19-HCB低剂量组、中剂量组、高剂量组的细胞凋亡占比分别为(5.32 ± 1.14)%、(23.50 ± 2.93)%、(32.68 ± 1.86)%、(41.13 ± 2.12)%; 各给药组与对照组比较细胞凋亡率显著上升(P < 0.000 1)。
细胞克隆形成实验结果显示对照组、5、10、20 μmol·L-1组的克隆形成数分别为(163.30 ± 12.34)、(88.00 ± 9.00)、(57.00 ± 6.25)、(46.67 ± 3.22); 给药各组与对照组比较, 细胞克隆形成数均显著减少(图5A、B), 差异具有显著性(P < 0.000 1)。侵袭实验结果显示对照组、5、10、20 μmol·L-1组的侵袭细胞数分别为(208.30 ± 7.02)、(208.00 ± 6.08)、(132.30 ± 8.51)、(110.70 ± 8.01); 10和20 μmol·L-1组相比于对照组细胞侵袭数明显减低(图5C、D), 差异具有显著性(P < 0.000 1)。
以RT-qPCR方法分析显示, 19-HCB对J82细胞相关基因mRNA表达水平具有明显的影响。结果如图6所示, 对照组、5、10、20 μmol·L-1组survivin基因的mRNA的相对表达量分别为: (1.01 ± 0.09)、(0.38 ± 0.04)、(0.37 ± 0.07)、(0.34 ± 0.02); p21基因的mRNA相对表达量分别为: (1.02 ± 0.08)、(0.83 ± 0.06)、(2.10 ± 0.22)、(2.61 ± 0.19); BIM的mRNA相对表达量分别为: (1.01 ± 0.08)、(1.29 ± 0.02)、(1.67 ± 0.03)、(1.79 ± 0.04); BAX的mRNA相对表达量分别为(1.02 ± 0.06)、(1.26 ± 0.07)、(1.51 ± 0.07)、(1.58 ± 0.04); 给药10 μmol·L-1后, 相关基因的mRNA表达水平相对于空白组均有明显差异(P < 0.000 1)。
在肿瘤的发生和进展过程中, 蛋白survivin、CDK1、p21与肿瘤细胞增殖失控相关[15-17]; BIM与BAX共同调控肿瘤细胞的凋亡[18]、AKT与肿瘤信号通路相关[19]。蛋白免疫印迹结果显示(图7), 化合物19-HCB处理72 h后, survivin、CDK1蛋白表达水平均随药物浓度升高而下调, AKT蛋白水平20 μmol·L-1组明显下调(P < 0.000 1); BIM、BAX蛋白水平给药后也呈现上调趋势(P < 0.001、P < 0.000 1); p21蛋白水平20 μmol·L-1组明显上调(P < 0.000 1)。
本研究对海洋真菌来源的化合物19-HCB进行了体外抗肿瘤活性评价, 包括对多种人类癌细胞系(包括人膀胱癌细胞J82、结直肠癌细胞HCT-116、肝癌细胞HepG-2和乳腺癌细胞MCF-7) 的抗肿瘤活性测试, 并重点以J82细胞为模型深入探讨其潜在的抗肿瘤机制。通过一系列体外实验, 包括MTT细胞活力检测、细胞划痕实验、高内涵细胞凋亡检测、流式细胞术、平板克隆形成实验、RT-qPCR和Western blot, 分析了19-HCB对细胞增殖、迁移、凋亡及相关基因和蛋白表达的影响。研究结果发现, 19-HCB作为一种潜在的抗膀胱癌药物, 其选择性抑制J82细胞(IC50: 0.59 μmol·L-1)。肿瘤细胞的迁移和侵袭能力强弱与肿瘤进展和预后密切相关, 划痕实验结果表明19-HCB能够显著抑制肿瘤细胞迁移。此外, 通过对19-HCB处理后的细胞进行Annexin V和PI双染实验研究其是否能够诱导细胞凋亡。Annexin V是一种钙离子依赖的磷脂结合蛋白, 当细胞发生凋亡时, 原本位于细胞膜脂质内侧的磷脂酰丝氨酸特异性地翻转到膜外侧, 与Annexin V-FITC结合产生绿色荧光。结果显示, 19-HCB处理后Annexin-V的阳性细胞比例显著增加, 提示其抑制细胞增殖的作用是通过诱导凋亡而实现的。
AKT也称为蛋白激酶B (PKB), 属于丝氨酸/苏氨酸激酶中的AGC (蛋白激酶A、G、C) 超家族[20]。AKT的异常激活驱动多种致癌过程, 包括促进细胞生存、抑制凋亡、促进生长和增殖, 促进细胞分化, 并介导肌动蛋白细胞骨架重排[21]。它还在肿瘤微环境中发挥着重要作用, 影响血管生成、炎症因子的招募以及免疫细胞的浸润。这些致癌过程共同促进肿瘤生长、转移, 以及治疗耐药性[19, 21]。近年来的临床前研究表明, AKT信号通路的异常激活可能是导致耐药的关键机制之一[22]。为深入探究凋亡通路在耐药中的作用, 研究者利用siRNA分别沉默了促凋亡蛋白BAX、BAK和BIM, 以验证它们对ipatasertib (AKT抑制剂) 诱导凋亡的必要性。最终证实了敲低BAX、BAK或BIM中任一蛋白, 均能显著削弱ipatasertib在膀胱癌细胞中引发的凋亡效应[23]。同时, survivin在膀胱癌中同样扮演着关键角色, 它通过抑制细胞凋亡和参与调控细胞分裂来促进肿瘤生存与发展。其抗凋亡作用主要依赖于和半胱天冬酶(Caspase) 等凋亡效应分子的直接或间接相互作用, 从而阻断细胞死亡程序。基于此, 膀胱内局部灌注靶向survivin的UsiRNA已成为一种颇具潜力的治疗新策略[24]。此外, 细胞周期蛋白依赖性激酶1 (CDK1) 的高表达也被证实与膀胱癌的不良临床特征显著相关[25]。
基因和蛋白水平数据提示, 19-HCB的作用机制涉及多条通路: 下调survivin可能促进肿瘤细胞的凋亡, CDK1可能导致细胞周期停滞, 而上调BIM和BAX则促进线粒体途径的凋亡; AKT通路抑制进一步佐证了其干扰生存信号的能力。综上所述, 19-HCB对膀胱癌细胞具有强效抑制作用, 其机制涉及诱导凋亡、抑制迁移和调控关键基因/蛋白表达; 本研究为膀胱癌治疗提供了新的候选分子, 并为后续开发基于19-HCB的药物治疗奠定了理论基础。

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2026年第61卷第6期
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doi: 10.16438/j.0513-4870.2025-1355
  • 接收时间:2025-11-13
  • 首发时间:2026-09-21
  • 出版时间:2026-06-12
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  • 收稿日期:2025-11-13
  • 修回日期:2026-01-21
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    1贵州中医药大学药学院, 贵州 贵阳 550025
    2中国医学科学院 北京协和医学院, 医药生物技术研究所, 国家新药(微生物)筛选实验室, 国家卫生健康委员会抗生素生物工程重点实验室, 北京 100050
    3中国科学院海洋研究所实验海洋生物学实验室, 山东 青岛 266071

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2种不同金属材料的力学参数
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species
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total species (%)
属
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种数
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species
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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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