Investigating the role of NRF2 in promoting radioresistance in oral squamous cell carcinoma.
Investigating the role of NRF2 in promoting radioresistance in oral squamous cell carcinoma.
批准号:
10164755
负责人:
Ryan Mary Murphy
金额:
$2.91万
依托单位国家:
美国
项目类别:
财政年份:
2019
资助国家:
美国
项目状态:
已结题
起止时间:
2019-07-01 至 2021-11-27
关键词:
AllelesAmerican Cancer SocietyAntioxidantsApoptosisAutomobile DrivingBiological AssayCancer BiologyCancer ModelCancer PatientCell LineCell ProliferationCell SurvivalCellsCessation of lifeChemicalsClinicalClustered Regularly Interspaced Short Palindromic RepeatsDNA DamageDataDisease ProgressionDrug TargetingEmbryoEnterobacteria phage P1 Cre recombinaseExposure toFDA approvedFibroblastsFoundationsGene ExpressionGeneticGenetic TranscriptionGenetically Engineered MouseGoalsGrantHead and Neck Squamous Cell CarcinomaHumanImmunohistochemistryIn VitroKeratinKnock-inLiteratureMalignant Epithelial CellMalignant NeoplasmsMalignant neoplasm of lungMass Spectrum AnalysisMeasuresMediatingMetabolic stressMethodsModelingMouse ProteinMusMutateMutationNF-E2-related factor 2OralOral cavityOutcomeOxidative StressPathway interactionsPatient-Focused OutcomesPatientsPharmacologyPhasePhenotypePhosphotransferasesPrognosisProteinsPublishingRadiationRadiation ProtectionRadiation therapyRadiobiologyRadiosensitizationReactive Oxygen SpeciesRegulationResectedResistanceRoleSignal TransductionSurvival RateTechniquesTestingTrainingUnited StatesUnresectableWorkcancer cellcancer geneticscancer initiationcancer typechemical carcinogenclinically relevantdruggable targeteffectiveness testingeffectiveness validationexperimental studyimprovedin vivoinhibitor/antagonistkeratinocytekinase inhibitorknock-downlive cell imagingmalignant mouth neoplasmmortalitymouse modelmouth squamous cell carcinomamutantneoplastic cellpreventprogramspromoterradiation resistanceresistance mechanismsmall moleculestandard of caretargeted treatmenttherapy resistanttranscription factortranscriptome sequencingtreatment comparisontumortumor growth
中文摘要
项目摘要/摘要:报告
在过去的几年里,体质活跃的NRF2信号转导系统与辐射抵抗和患者预后差密切相关。
癌症的类型,包括口腔鳞状细胞癌(OSCC)。NRF2是一种新的转录因子,它直接推动肿瘤的发生。
第二阶段:抗氧化剂基因表达计划。在癌症中,NRF2基因经常发生突变,从而成为一种结构性疾病。
活性,从而促进机体免受氧化应激和代谢应激的伤害,从而推动辐射抵抗。
确立了NRF2药物在促进癌症放射抵抗方面的作用,使其成为治疗癌症患者的一种极具吸引力的靶向药物。
我们的研究小组已经产生了第一个临床上与NRF2基因突变相关的基因突变基因(Nrf2E79Q)和GEMM问卷,以进一步评估NRF2基因在癌症中的重要作用。
癌症的发生、发展和治疗耐药。我的初步研究数据显示,小鼠处于胚胎阶段。
从我们的Nrf2E79Q和GEMM中提取的成纤维细胞(MEF)不仅提高了细胞的活力,而且还促进了细胞的增殖。
放射治疗与野生型NRF2携带者相比,这些发现与文献报道基本一致。
证明NRF2可以保护细胞免受氧化应激和辐射的伤害。通过基因杂交,我们可以做到这一点。
分离的NRF2基因表达不利于口腔鳞状细胞癌的发生,通过用一种新的化学物质治疗口腔鳞状细胞癌的小鼠,也会诱发口腔鳞癌。
致癌物。为了我的论文项目,我将继续研究NRF2基因在口腔鳞状细胞癌体内实验和体外实验中的作用。
从我们的细胞模型中衍生出来,通过分析细胞的存活率、细胞的增殖、细胞和基因的表达以及细胞和细胞之间的差异。
Nrf2E79Q基因和野生型基因依赖于放射治疗。我假设NRF2基因促进了人类对辐射的抵抗力。
在口腔鳞状细胞癌中,抑制NRF2基因的表达将有助于缓解这种耐药性。尽管它具有广泛的耐药性。
有证据表明,NRF2活性对临床试验结果有负面影响,但仍没有FDA批准的NRF2。
抑制物。作为一种转录调节因子,NRF2基因本身就很难直接作用于靶点。因此,我们一直在寻找新的鉴定方法。
可药物靶标-特别是调节NRF2的蛋白激酶。为了实现这一目标,我们进行了一场高吞吐量的现场表演。
细胞成像和化学筛查使用的是Kinase抑制剂和设置蛋白(PKIS)发布的最新数据。我已经验证了无数次的测试命中。
从最初的筛选来看,作为NRF2受体抑制剂,包括具有较强药物选择性的化合物,可以抑制多种PI3K。此外,还包括
研究NRF2激活蛋白在口腔鳞状细胞角质形成细胞和口腔鳞癌中的作用,我的论文和工作也将检验这一点。
这些药物的有效性在于增强Nrf2E79Q口腔鳞癌细胞对辐射的敏感性。此外,还有助于增强翻译能力。
与此相关的是,我将利用CRISPR技术创建具有Nrf2E79Q等位基因的人类同基因肿瘤细胞系,以研究是否有抑制作用。
Nrf2可以降低人类口腔鳞癌患者的放射防护水平。将对这些蛋白激酶抑制剂的临床有效性进行验证。
使这一领域更接近于将NRF2基因作为癌症治疗的靶点,并最终改善患者的预后。这项工作。
在这篇论文中,我和我最大的一篇论文将为我提供更广泛的知识和更强大的技术培训机会。
此外,还包括小鼠模型、药物治疗和抵抗力、放射、生物学、药物和靶向药物治疗等新概念。
英文摘要
PROJECT SUMMARY/ABSTRACT:
Constitutively active NRF2 signaling is associated with radiation resistance and poor patient outcome in several
cancer types, including oral squamous cell carcinoma (OSCC). NRF2 is a transcription factor which drives the
phase II antioxidant gene expression program. In cancer, NRF2 is frequently mutated to become constitutively
active, resulting in protection from oxidative and metabolic stress, thereby driving radioresistance. The
established role of NRF2 in promoting radioresistance makes it an attractive drug target to treat cancer patients.
Our group generated the first clinically relevant NRF2 mutant (Nrf2E79Q) GEMM to evaluate the role of NRF2 in
cancer initiation, progression and therapeutic resistance. My preliminary data show that mouse embryonic
fibroblasts (MEFs) derived from our Nrf2E79Q GEMM have increased cell viability and proliferation following
radiation treatment compared to those with wild-type NRF2. These findings are consistent with the literature and
demonstrate that NRF2 protects cells from oxidative stress and radiation. Through genetic crossing, we have
isolated NRF2 expression to the oral cavity and will induce OSCC by treating the mice with a chemical
carcinogen. For my thesis project, I will study the role of NRF2 in OSCC in vivo and in vitro using tumor cells
derived from our model, analyzing cell viability, cell proliferation, and gene expression differences between
Nrf2E79Q and wild-type upon radiation treatment. I hypothesize that NRF2 promotes resistance to radiation
in oral squamous cell carcinoma and inhibiting NRF2 will mitigate this resistance. Despite extensive
evidence of a negative impact of NRF2 activity on clinical outcome, there remains no FDA approved NRF2
inhibitors. As a transcription factor, NRF2 is inherently difficult to directly target. Therefore, we sought to identify
druggable targets—specifically kinases—that regulate NRF2. To this end, we performed a high-throughput live
cell imaging chemical screen using the Published Kinase Inhibitor Set (PKIS). I have validated numerous hits
from the screen as NRF2 inhibitors, including compounds with strong selectivity to multiple PI3Ks. In addition to
studying the role of NRF2 activation in oral keratinocytes and OSCC, my thesis work will also test the
effectiveness of these inhibitors in sensitizing Nrf2E79Q OSCC cells to radiation. Further, to empower translational
relevance, I will create human isogenic cell lines with a Nrf2E79Q allele using CRISPR to study whether inhibiting
NRF2 decreases radioprotection in a human OSCC. Validation of the effectiveness of these kinase inhibitors will
bring the field a step closer to targeting NRF2 in cancer and ultimately improve patient outcomes. The work
prosed in this grant and my larger thesis will provide me with extensive and strong training in new techniques as
well as in the concepts of mouse modeling, treatment resistance, radiation biology, and targeted therapies.
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会议论文
Investigating the role of NRF2 in promoting radioresistance in oral squamous cell carcinoma.
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批准号:9760504
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项目类别:
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资助金额:$4.58万
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财政年份:2019
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负责人:Ryan Mary Murphy
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依托单位:
海外基金