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:9760504
- 负责人:
- 金额:$ 4.58万
- 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 2023-06-30
- 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 TargetingEffectivenessEmbryoEnterobacteria phage P1 Cre recombinaseExposure toExpression ProfilingFDA 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 OutcomesPatientsPharmacologyPhasePhenotypePhosphotransferasesProteinsPublishingRadiationRadiation ProtectionRadiation therapyRadiation-Sensitizing AgentsRadiobiologyRadioresistanceRadiosensitizationReactive Oxygen SpeciesRegulationResectedResistanceRoleSignal TransductionSurvival RateTechniquesTestingTrainingUnited StatesUnresectableValidationWorkcancer cellcancer geneticscancer initiationcancer typechemical carcinogenclinically relevantdruggable targetexperimental studyimprovedin vivoinhibitor/antagonistkeratinocytekinase inhibitorknock-downlive cell imagingmalignant mouth neoplasmmortalitymouse modelmouth squamous cell carcinomamutantneoplastic celloutcome forecastpreventprogramspromoterradiation resistanceresistance mechanismsmall moleculestandard of caretargeted treatmenttherapy resistanttranscription factortranscriptome sequencingtumortumor 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:
在某些情况下,组成型活跃的 NRF2 信号传导与辐射耐受性和患者预后不良有关
癌症类型,包括口腔鳞状细胞癌 (OSCC),NRF2 是一种驱动转录因子。
II 期抗氧化基因表达程序。在癌症中,NRF2 经常发生突变而成为组成型。
活性,从而防止氧化和代谢应激,从而提高放射抗性。
NRF2 在促进放射抗性方面的既定作用使其成为治疗癌症患者的有吸引力的药物靶点。
我们的小组生成了第一个临床相关的 NRF2 突变体 (Nrf2E79Q) GEMM,以评估 NRF2 在
我的初步数据显示,小鼠胚胎的癌症发生、进展和治疗抵抗。
源自我们的 Nrf2E79Q GEMM 的成纤维细胞 (MEF) 增加了细胞活力和增殖能力
与野生型 NRF2 的放射治疗相比,这些发现与文献一致。
通过基因杂交,我们证明 NRF2 可以保护细胞免受氧化应激和辐射的影响。
将 NRF2 表达分离到口腔,并通过用化学物质处理小鼠来诱导 OSCC
在我的论文项目中,我将使用肿瘤细胞在体内和体外研究 NRF2 在 OSCC 中的作用。
来自我们的模型,分析细胞活力、细胞增殖和基因表达差异
Nrf2E79Q 和野生型在放射治疗后的表现我推测 NRF2 会促进对放射的抵抗力。
尽管存在广泛的耐药性,但抑制 NRF2 将减轻口腔鳞状细胞癌的耐药性。
有证据表明 NRF2 活性对临床结果有负面影响,但目前尚无 FDA 批准的 NRF2
作为一种转录因子,NRF2本质上很难直接靶向,因此我们考虑对其进行鉴定。
调节 NRF2 的可药物靶点(特别是激酶)。为此,我们进行了高通量实时实验。
使用已发布的激酶抑制剂集 (PKIS) 进行细胞成像化学筛选 我已经验证了许多命中结果。
筛选出的 NRF2 抑制剂,除了对多种 PI3K 具有强选择性的化合物外。
研究 NRF2 激活在口腔角质形成细胞和 OSCC 中的作用,我的论文工作还将测试
这些抑制剂在使 Nrf2E79Q OSCC 细胞对辐射敏感方面的有效性。此外,还可以增强翻译能力。
相关性,我将使用 CRISPR 创建具有 Nrf2E79Q 等位基因的人类同基因细胞系,以研究是否抑制
NRF2 会降低人类 OSCC 的放射防护作用,将验证这些激酶抑制剂的有效性。
这项工作使该领域朝着针对癌症的 NRF2 目标迈进了一步,并最终改善了患者的治疗结果。
在这笔资助中进行的研究和我的更大的论文将为我提供广泛而有力的新技术培训,例如
以及小鼠建模、治疗耐药性、放射生物学和靶向治疗的概念。
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:
10164755 - 财政年份:2019
- 资助金额:
$ 4.58万 - 项目类别:
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