Investigating the role of NRF2 in promoting radioresistance in oral squamous cell carcinoma.
研究 NRF2 在促进口腔鳞状细胞癌放射抗性中的作用。
基本信息
- 批准号:10164755
- 负责人:
- 金额:$ 2.91万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-07-01 至 2021-11-27
- 项目状态:已结题
- 来源:
- 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
项目摘要
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.
项目摘要/摘要:
偶然的活动活性NRF2信号传导与辐射抗性和患者预后不良相关
癌症类型,包括口服鳞状细胞癌(OSCC)。
II期抗氧化基因表达程序。
活跃,导致氧化和代谢应激,它们可以驱动放射线
NRF2在促进放射线抗性中的确定作用使其成为信任癌症患者的有吸引力的药物靶标。
我们的小组生成了第一个临床相关的NRF2突变体(NRF2E79Q)GEMM来评估NRF2在
癌症的启动,进度和治疗性抗性。
从我们的NRF2E79Q GEMM得出的成纤维细胞(MEF)具有增加的细胞活力和增殖性。
与野生型NRF2相比,辐射处理与文献相比
证明NRF2可以通过遗传穿越来保护细胞免受氧化应激和辐射的影响。
分离的NRF2表达在OAL腔中,并通过使用化学物质处理小鼠诱导OSCC
致癌物。
从我们的模型中得出,分析细胞活力,细胞的泛滥和基因表达差异
辐射处理后,NRF2E79Q和野生型。
在口服鳞状细胞癌中,NRF2仍会减轻这种阻力
NRF2活性对临床结果的负面影响的证据,遗骸未经FDA批准的NRF2
抑制剂。
可药物特异性靶标的Kinacys-正规NRF2。
使用已发表的激酶抑制剂集(PKI)的细胞成像筛选。
从屏幕作为NRF2抑制剂中,除了多个PI3Ks的选择性
研究NRF2激活在口服角质形成细胞和OSCC中的作用,我的这项工作Wilso测试了您
这些吸入者在将NRF2E79Q OSCC细胞敏化辐射方面的有效性。
相关性,我将使用CRISPR与NRF2E79Q艾列勒(CRISPR)建立人类的等生细胞系,以研究是否抑制
NRF2在人类OSCC中降低了辐射保护。
使该领域更接近靶向NRF2的癌症,并最终改善患者的结果
在这笔赠款中,我的较大的这些都为我提供了新技术的广泛而强大的培训培训
以及小鼠建模,治疗耐药性,放射生物学和靶向疗法的概念。
项目成果
期刊论文数量(0)
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Ryan Mary Murphy其他文献
Ryan Mary Murphy的其他文献
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{{ truncateString('Ryan Mary Murphy', 18)}}的其他基金
Investigating the role of NRF2 in promoting radioresistance in oral squamous cell carcinoma.
研究 NRF2 在促进口腔鳞状细胞癌放射抗性中的作用。
- 批准号:
9760504 - 财政年份:2019
- 资助金额:
$ 2.91万 - 项目类别:
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