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Abstract 320: Glycan analysis from tissue to serum, identification and validation of a biomarker for the early detection of hepatocellular carcinoma 320:从组织到血清的聚糖分析,鉴别和验证肝细胞癌早期检测的生物标志物
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-320
A. Mehta, Mengjun Wang, Connor A. West, Alyson P. Black, P. Angel, Richard Drakje
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引用次数: 0
Abstract 285: Development of phenyl 4-(2-oxo-3-alkylimidazolidin-1-yl)benzenesulfonates as new antimitotic cytochrome P450 1A1-activated prodrugs selective toward breast cancers: Evaluation of branched alkyl chains 285:苯基4-(2-氧-3-烷基咪唑烷-1-基)苯磺酸盐作为新的抗有丝分裂细胞色素P450 - 1a1激活的乳腺癌前药的开发:支链烷基链的评价
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-285
Chahrazed Bouzriba, Atziri Corin Chavez Alvarez, Mathieu Gagné-Boulet, J. Lacroix, M. Côté, René C.-Gaudrault, S. Fortin
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引用次数: 0
Abstract 281: pH-sensitive liposome for siRNA delivery to treat drug-resistant ovarian cancer 281: ph敏感脂质体用于siRNA递送治疗耐药卵巢癌
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-281
K. L. Alatise, S. Gardner, Angela A Alexander-Bryant
Introduction: With a 5-year survival rate of 47%, ovarian cancer is the 5th leading cause of death amongst women worldwide. Over 75% of patients experience recurrence after initial treatment, indicating a need for improved treatment options. Drug resistance is a major barrier hindering the success of current treatment methods. Our study analyzes the characteristics of a stimuli-sensitive liposomal delivery system for combatting drug resistance. Our delivery system will deliver bioactive siRNAs targeting genes related to drug resistance, cell proliferation, and apoptosis. In this study, we investigate the characteristics of the liposomes to determine particle size, surface charge, and ability to encapsulate/bind both siRNAs. We also begin to investigate the delivery potential of the pH-sensitive liposomal formulation in vitro using ovarian cancer cell lines. Methods: Empty and siRNA loaded cationic, pH-sensitive liposomes (CHEMS-LPs) were synthesized by the thin-film hydration method. Liposome size, zeta potential, and polydispersity index (PDI) were measured by dynamic light scattering (DLS). To measure siRNA encapsulation efficiency, fluorescently labeled siRNA was loaded into CHEMS-LPs and subjected to centrifugation to pellet the LPs. Fluorescence spectroscopy was used to detect siRNA in the supernatant. The toxicity of unloaded CHEMS-LPs was determined by an MTS assay using OVCAR3 (drug-sensitive) and OVCAR3-T40 (drug-resistant) human ovarian cancer cells. Results: The size and zeta potential of blank and siRNA-loaded CHEMS-LPs were 97.88 ± 2.39 nm and 29.0 ± 2.00 mV, and 80.78 ± 0.77​ nm and 13.1 ±1.66​ mV, respectively. The positively charged zeta potential confirms the cationic nature of our liposomes. The PDI demonstrated that the liposomes were unimodal and monodisperse with PDI values of less than 0.300 for each formulation. In addition, siRNA was successfully bound to CHEMS-LPs through electrostatic interaction with the cationic lipid layer, resulting in an encapsulation efficiency of 99.6% Conclusion: CHEMS-LPs are pH-sensitive, cationic, monodisperse liposomes able to encapsulate siRNAs in order to mediate delivery into ovarian cancer cells. Their stable structure, positive charge, and low cytotoxicity is promising for future studies, including delivery of bioactive siRNAs to stimulate downregulation of target genes related to drug resistance. Acknowledgements: This work was supported in part by the National Science Foundation EPSCoR Program under Award # OIA-1655740. We would like to thank George Duran from Stanford University for donating the OVCAR3-T40 cell line. Citation Format: Kharimat Lora Alatise, Samantha Gardner, Angela Alexander-Bryant. pH-sensitive liposome for siRNA delivery to treat drug-resistant ovarian cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 281.
导言:卵巢癌的5年生存率为47%,是全球妇女死亡的第五大原因。超过75%的患者在初始治疗后出现复发,这表明需要改进治疗方案。耐药性是阻碍当前治疗方法取得成功的主要障碍。我们的研究分析了一种对抗耐药性的刺激敏感脂质体递送系统的特点。我们的递送系统将递送生物活性sirna,靶向与耐药、细胞增殖和凋亡相关的基因。在这项研究中,我们研究了脂质体的特性,以确定颗粒大小、表面电荷和封装/结合这两种sirna的能力。我们也开始研究ph敏感脂质体制剂在体外使用卵巢癌细胞系的输送潜力。方法:采用薄膜水合法制备空siRNA负载的阳离子型ph敏感脂质体(CHEMS-LPs)。采用动态光散射法(DLS)测定脂质体大小、zeta电位和多分散指数(PDI)。为了测量siRNA的包封效率,荧光标记的siRNA被装载到CHEMS-LPs中,并进行离心使LPs成球。荧光光谱法检测上清液中的siRNA。利用OVCAR3(药物敏感)和OVCAR3- t40(耐药)人卵巢癌细胞,采用MTS法测定空载CHEMS-LPs的毒性。结果:空白和负载sirna的CHEMS-LPs的大小分别为97.88±2.39 nm和29.0±2.00 mV, zeta电位分别为80.78±0.77 nm和13.1±1.66 mV。带正电的ζ电位证实了脂质体的阳离子性质。PDI结果表明,脂质体具有单峰性和单分散性,各制剂的PDI值均小于0.300。此外,siRNA通过静电作用与阳离子脂质层成功结合在CHEMS-LPs上,包封效率达99.6%。结论:CHEMS-LPs是一种ph敏感、阳离子、单分散的脂质体,能够包封siRNA,介导其进入卵巢癌细胞。它们稳定的结构、正电荷和低细胞毒性是未来研究的前景,包括递送生物活性sirna来刺激与耐药性相关的靶基因的下调。致谢:本工作得到了美国国家科学基金会EPSCoR项目的部分支持,项目编号为OIA-1655740。我们要感谢斯坦福大学的George Duran捐赠OVCAR3-T40细胞系。引文格式:Kharimat Lora Alatise, Samantha Gardner, Angela Alexander-Bryant。用于siRNA递送的ph敏感脂质体治疗耐药卵巢癌[摘要]。见:美国癌症研究协会2021年年会论文集;2021年4月10日至15日和5月17日至21日。费城(PA): AACR;癌症杂志,2021;81(13 -增刊):摘要第281期。
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引用次数: 0
Abstract 321: Identification of proteins associated withFAT1mutations which potentially contribute to oncogenesis and progression of head and neck cancers 321:鉴定与fat1突变相关的蛋白可能有助于头颈癌的发生和进展
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-321
Z. Chen, Zhengjia Chen, Chao Zhang, Jianhong Chen, Dongsheng Wang, N. Saba, Zhong Chen
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引用次数: 0
Abstract 290: Comparison of clinically relevant fusions detection using two multiplexing RNA based platforms: nCounter and GeneReader 290: nCounter和generader两种基于多路复用RNA平台的临床相关融合检测的比较
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-290
M. G. Ibañez, A. Giménez-Capitán, Marta Vives Usano, R. R. Lladó, S. Rodríguez, E. Aldeguer, B. G. Peláez, N. J. Ariza, C. Aguado, S. Viteri, A. Aguilar, I. Moya, C. Cabrera, M. Catalan, M. G. Cao, S. García-Román, Jordi Bertran Alamillo, F. G. Casabal, R. Rosell, M. Molina-Vila, C. D. L. Casas
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引用次数: 0
Abstract 293: Second-generation tricyclic pyrimido-pyrrolo-oxazine mTOR inhibitors suitable for the treatment of CNS disorders 293:第二代三环嘧啶-吡咯-恶嗪类mTOR抑制剂适合治疗中枢神经系统疾病
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-293
Chiara Borsari, Erhan Keles, A. Treyer, Martina De Pascale, P. Hebeisen, M. Hamburger, M. Wymann
{"title":"Abstract 293: Second-generation tricyclic pyrimido-pyrrolo-oxazine mTOR inhibitors suitable for the treatment of CNS disorders","authors":"Chiara Borsari, Erhan Keles, A. Treyer, Martina De Pascale, P. Hebeisen, M. Hamburger, M. Wymann","doi":"10.1158/1538-7445.AM2021-293","DOIUrl":"https://doi.org/10.1158/1538-7445.AM2021-293","url":null,"abstract":"","PeriodicalId":9563,"journal":{"name":"Cancer Chemistry","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79368948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abstract 322: Protein expression shift and potential diagnostic markers through proteomics profiling of A549 lung cancer cells 322:通过A549肺癌细胞的蛋白质组学分析,蛋白表达转移和潜在的诊断标志物
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-322
A. Olajuyin, A. Olajuyin, Ziqi Wang, Zhiwei Xu, Hayatu Raji, M. Okeke, Xiaoju Zhang
{"title":"Abstract 322: Protein expression shift and potential diagnostic markers through proteomics profiling of A549 lung cancer cells","authors":"A. Olajuyin, A. Olajuyin, Ziqi Wang, Zhiwei Xu, Hayatu Raji, M. Okeke, Xiaoju Zhang","doi":"10.1158/1538-7445.AM2021-322","DOIUrl":"https://doi.org/10.1158/1538-7445.AM2021-322","url":null,"abstract":"","PeriodicalId":9563,"journal":{"name":"Cancer Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78731791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abstract 269: Harnessing the mechanical power of nanomachines to treat cancer: Light-activated molecular nanomachines kill melanoma and oral cancer cells 269:利用纳米机器的机械力量治疗癌症:光激活分子纳米机器杀死黑色素瘤和口腔癌细胞
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-269
C. Ayala-Orozco, Alexis van Venrooy, Dongdong Liu, Yewen Shi, J. L. Beckham, D. Izhaky, J. Tour, J. Myers, Roberto Rangel
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引用次数: 0
Abstract 271: High-throughput fecal metabolic profiling for the early detection of colorectal cancer using a direct mass spectrometry assay 摘要271:利用直接质谱法进行高通量粪便代谢谱分析以早期检测结直肠癌
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-271
Petra Paizs, M. Widlak, Á. Perdones-Montero, M. Sani, L. Ford, J. Alexander, Simon J. S. Cameron, R. Arasaradnam, J. Kinross, Z. Takáts
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引用次数: 0
Abstract 326: Structural dynamics-based hit generation to disrupt YAP/TAZ-TEAD protein-protein interaction 基于结构动力学的命中生成破坏YAP/TAZ-TEAD蛋白-蛋白相互作用
Pub Date : 2021-07-01 DOI: 10.1158/1538-7445.AM2021-326
L. Du, Jing Liu, Qinglong Zeng, M. Xu, Jiting Lu, Qiangang Zheng, Jidong Zhu
The Hippo pathway is an evolutionarily conserved pathway involved in developmental biology. The biological functions of Hippo pathway are executed by the downstream transcriptional coactivator YAP/TAZ, which shuttle between the cytoplasm and the nucleus and have to interact with TEADs in nucleus for transcription activation. YAP/TAZ are master transcriptional factors widely activated in human cancers to promote cancer initiation, progression, metastasis and therapy resistance. It has been shown that aberrant YAP/TAZ activation is also associated with the adapted tumor microenvironment (TME) for tumor growth. Dysregulation in Hippo pathway and YAP/TAZ-TEADs transcriptional activity is pervasively associated with various types of cancers, including mesothelioma, squamous cell cancers, liver cancer and lung cancer, making it an attractive target for cancer therapy. Therefore, inhibition of YAP/TAZ oncogenic activity by blocking YAP/TAZ-TEADs interaction is an effective approach for cancer treatment. In this study, we aim to discover small molecule inhibitors that bind to TEADs and disrupt YAP/TAZ-TEADs interaction for cancer therapy. With superposition of all the available crystal structures of four TEAD subtypes in the public database, we found the YAP Ω loop binding site of TEADs is relatively rigid (of backbone atoms), but the side chain flexibility of K289, K265 and V406 in TEAD1 affects the shape of the binding site significantly. Notably, in two TEAD2 structures, e.g. PDB ID: 5dqe and 5dq8, K301 (K274 of TEAD1) adopts an open conformation and accommodates a flufenamic acid to bind in an induced pocket. Using 5dq8 as the protein model, we virtually screened a fragment library, and identified a hit compound that is suitable to combine with flufenamic acid. Interaction between the hit compound and TEAD1 was confirmed by 1D-NMR (STD). Based on the docking poses, we combined the hit and flufenamic acid, designed and synthesized several compounds. Interaction with TEAD1 of the compounds were confirmed by 1D-NMR, SPR and HTRF. Crystal structures of representative compounds confirmed the predicted binding mode in TEAD1. With further medicinal chemistry efforts, we have discovered a series of novel YAP/TAZ-TEAD PPI inhibitors bound at the Ω loop site of TEAD1. Citation Format: Lin Du, Jing Liu, Qinglong Zeng, Ming Xu, Jiting Lu, Qiangang Zheng, Jidong Zhu. Structural dynamics-based hit generation to disrupt YAP/TAZ-TEAD protein-protein interaction [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 326.
Hippo通路是一个涉及发育生物学的进化保守通路。Hippo通路的生物学功能是由下游的转录辅激活因子YAP/TAZ执行的,它穿梭于细胞质和细胞核之间,必须与细胞核中的TEADs相互作用才能激活转录。YAP/TAZ是在人类癌症中广泛激活的主要转录因子,可促进癌症的发生、进展、转移和治疗耐药。研究表明,异常的YAP/TAZ激活也与肿瘤生长的适应性肿瘤微环境(TME)有关。Hippo通路和YAP/TAZ-TEADs转录活性的失调与各种类型的癌症普遍相关,包括间皮瘤、鳞状细胞癌、肝癌和肺癌,使其成为癌症治疗的一个有吸引力的靶点。因此,通过阻断YAP/TAZ- teads相互作用抑制YAP/TAZ的致癌活性是治疗癌症的有效途径。在这项研究中,我们的目标是发现与TEADs结合并破坏YAP/TAZ-TEADs相互作用的小分子抑制剂,用于癌症治疗。通过对公开数据库中四种TEAD亚型所有可用晶体结构的叠加,我们发现TEAD的YAP Ω环结合位点相对刚性(主链原子),但TEAD1中K289、K265和V406的侧链柔韧性对结合位点的形状影响较大。值得注意的是,在两个TEAD2结构中,例如PDB ID: 5dqe和5dq8, K301 (TEAD1的K274)采用开放构象并容纳氟胺酸在诱导口袋中结合。以5dq8为蛋白模型,虚拟筛选片段文库,鉴定出适合与氟芬那酸结合的命中化合物。通过1D-NMR (STD)证实了命中化合物与TEAD1的相互作用。基于对接姿态,我们将hit和氟芬那酸结合,设计并合成了几种化合物。化合物与TEAD1的相互作用经1D-NMR、SPR和htr证实。代表性化合物的晶体结构证实了TEAD1中预测的结合模式。通过进一步的药物化学研究,我们发现了一系列新的YAP/TAZ-TEAD PPI抑制剂,这些抑制剂结合在TEAD1的Ω环上。引用格式:杜林,刘静,曾庆龙,徐明,卢继廷,郑强刚,朱继东。基于结构动力学的命中生成破坏YAP/TAZ-TEAD蛋白-蛋白相互作用[摘要]。见:美国癌症研究协会2021年年会论文集;2021年4月10日至15日和5月17日至21日。费城(PA): AACR;癌症杂志,2021;81(13 -增刊):摘要第326期。
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Cancer Chemistry
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