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:
组成型活性NRF2信号传导与辐射抗性和较差的患者预后有关
癌症类型,包括口腔方方癌(OSCC)。 NRF2是一个转录因子,可驱动
II期抗氧化基因表达程序。在癌症中,NRF2经常被突变为组成性
活跃,导致免受氧化物和代谢胁迫的保护,从而驱动放射线。这
NRF2在促进辐射抗性中的确定作用使其成为治疗癌症患者的吸引人药物靶标。
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
癌症倡议,进展和耐药性。我的初步数据表明鼠标胚胎
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的辐射处理相比。这些发现与文献一致
证明NRF2可保护细胞免受氧化物的胁迫和辐射的侵害。通过遗传穿越,我们有
分离的NRF2表达在口腔中,并通过使用化学物质处理小鼠来诱导OSCC
致癌物。对于我的论文项目,我将使用肿瘤细胞研究NRF2在OSCC和体外的作用
源自我们的模型,分析细胞活力,细胞增殖和基因表达差异
放射治疗后NRF2E79Q和野生型。我假设NRF2促进了对辐射的抗性
在口服鳞状细胞癌和抑制NRF2中,将减轻这种耐药性。尽管很广泛
NRF2活性对临床结果的负面影响的证据,没有FDA批准的NRF2
抑制剂。作为转录因子,NRF2本质上很难直接靶向。因此,我们感觉到
可药物靶标(特定于激酶)调节NRF2。为此,我们进行了高通量现场
使用已发表的激酶抑制剂集(PKI)的细胞成像化学筛选。我已经验证了许多热门歌曲
从屏幕作为NRF2抑制剂,包括对多个PI3K的强选择性的化合物。此外
研究NRF2激活在口服角质形成细胞和OSCC中的作用,我的论文工作还将测试
这些抑制剂在将NRF2E79Q OSCC细胞敏感的有效性。此外,赋予翻译能力
相关性,我将使用CRISPR与NRF2E79Q Alllele建立人类的等生细胞系,以研究是否抑制
NRF2降低了人类OSCC的放射保护。验证激酶抑制剂的有效性将
使该领域更接近靶向癌症中的NRF2,并最终改善患者预后。工作
在这笔赠款和我的较大论文中所说的将为我提供新技术的广泛而强大的培训
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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