Examine the function of APOBEC3B in epithelial ovarian cancer stem cells
检查 APOBEC3B 在上皮性卵巢癌干细胞中的功能
基本信息
- 批准号:10438420
- 负责人:
- 金额:$ 7.9万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-03-01 至 2024-02-29
- 项目状态:已结题
- 来源:
- 关键词:AddressAdoptionApoptosisAreaCancer PatientCancer RelapseCell CycleCell Cycle ArrestCell Cycle RegulationCell MaintenanceCellsChromosome abnormalityCombined Modality TherapyCytidineDNADNA DamageDNA Double Strand BreakDNA Modification ProcessDNA RepairDNA Sequence AlterationDNA Single Strand BreakDataDeaminaseDeaminationDevelopmentDiagnosisDiseaseDrug resistanceEnzymesEpithelial ovarian cancerFamilyFrequenciesGoalsInduced MutationInheritedInnate Immune ResponseL1 ElementsLeadMaintenance TherapyMalignant Female Reproductive System NeoplasmMalignant NeoplasmsMalignant neoplasm of ovaryMedicalMissionModelingMolecularMonitorMutationNeoplasm MetastasisOrganismOrganoidsPathway interactionsPatientsPhasePlayPoint MutationPopulationPrevalencePrimary NeoplasmProgression-Free SurvivalsProteinsRecurrenceRecurrent diseaseResearchResistanceResistance developmentRoleSingle-Stranded DNASourceSurvival RateTestingTreatment EfficacyUnited States National Institutes of HealthUridineViralVirus ReplicationWorkapolipoprotein B mRNA editing enzymebrca genecancer stem cellcancer typechemotherapyeffective therapygene repairimprovedinhibitorinnovationinsightmutantnew therapeutic targetnovelnovel therapeuticsoverexpressionparticlepatient subsetspolypeptidepreventrare cancerresponseself-renewalstem cell biologystem cell functionstem cellsstemnesstherapy resistanttumortumor growth
项目摘要
SUMMARY/ABSTRACT
Ovarian cancer is the most lethal gynecologic malignancy and is frequently diagnosed at an advanced-stage.
One of the most aggressive types of ovarian cancer is epithelial ovarian cancer (EOC) and 5-year survival is less
than 20%. In recent years, PARP inhibitors (PARPi) has shown impressive therapeutic efficacy as both
maintenance therapy and in recurrent setting. However, since the wide application of PARPi, patients ultimately
develop drug resistance to PARPi which leaves them with few treatment options. Thus, the development of novel
therapies to overcome PAPRi resistance represents an urgent unmet medical need. The PARPi-resistant
patients often have enriched cancer stem cells (CSCs) with enhanced pro-survival and self-renewal capacity.
Evidence demonstrations that EOC CSCs are responsible for primary tumor growth, metastasis, disease relapse
and resistance to chemotherapy, suggesting CSC is an attractive target for eradicating EOC. Our long-term goal
is to identify new targets for development of less toxic and more effective therapies by eliminating this cell
population. Apolipoprotein B mRNA editing enzyme catalytic polypeptide-like 3 (APOBEC3) proteins are a family
of DNA deaminase that catalyze cytidine to uridine (C-to-U) on single-strand DNA. This important DNA
modification is abundant in a wide array of cancer types and represent the only enzymatic source of mutations.
We discovered that APOBEC3B (A3B) is the main DNA mutators in EOC CSC. The C-to-U DNA mutation activity
and A3B expression is reduced in EOC CSCs compared to non-CSCs. Importantly, inhibition of A3B leads to
PARPi resistance, elevated frequency of CSCs, and enhanced expression of stemness factor SOX2. These
novel insights raise the possibility that A3B activation may sensitize EOC CSCs to PARPi. Our central hypothesis
is that EOC CSCs maintain low level of A3B in order to avoid excess DNA damage thereby counters the effect
of PARPi. The overall goal of this study is to dissect the mechanism through which A3B and DNA deamination
regulates CSC maintenance and promote response to PARPi in EOC CSC. We will address our hypothesis in
two specific aims: 1) Determine if modified A3B activity will sensitize CSCs to combination therapy with PARPi,
2) Identify the novel mechanisms by which A3B regulates response to PARP inhibitor in EOC CSCs. We will
perform A3B overexpression studies in patient-derived organoid models and comprehensively evaluate changes
in EOC CSC functions and the response to PARPi. Mechanistically, we will assess DNA damage pathways,
chromosomal abnormalities, and ssDNA break levels in CSCs that overexpress A3B alone and in combination
treatment with PARPi. In addition, the molecular mechanism of how A3B regulates CSC’s response to PARPi
will also be examined. This innovative study will improve our understanding of how A3B sensitize EOC CSCs to
PARPi by promoting DNA damage and uncover valuable novel therapeutic targets to preventing ovarian cancer
relapse. These mechanisms may be broadly applicable to other CSC-driven malignancies.
摘要/摘要
卵巢癌是最致命的妇科恶性肿瘤,常在晚期确诊。
卵巢癌中最具侵袭性的类型之一是上皮性卵巢癌(EOC),5年生存率较低
超过20%。近年来,PARP抑制剂(PARPI)显示出令人印象深刻的治疗效果
维持治疗和复发期。然而,由于PARPI的广泛应用,患者最终
对PARPI产生抗药性,这让他们几乎没有治疗选择。因此,小说的发展
克服纸巾耐药性的疗法代表着一种紧急的、未得到满足的医疗需求。抗PARPI的
患者通常拥有丰富的肿瘤干细胞(CSCs),具有增强的促生存和自我更新能力。
证据表明,EoC CSCs与原发肿瘤的生长、转移和疾病复发有关
化疗耐药,提示CSC是根除EOC的有吸引力的靶点。我们的长期目标
是通过消除这种细胞来确定开发毒性更低、更有效的治疗方法的新靶点
人口。载脂蛋白B mRNA编辑酶催化多肽样3(APOBEC3)蛋白是一个家族
在单链DNA上催化胞苷生成尿苷(C-to-U)的DNA脱氨酶。这种重要的DNA
修饰在广泛的癌症类型中大量存在,是唯一的突变酶来源。
我们发现APOBEC3B(A3B)是EoC CSC的主要DNA突变子。C-U DNA突变活性的研究
与非CSCs相比,EoC CSCs中A3B的表达降低。重要的是,抑制A3B会导致
PARPI抗性,CSCs频率升高,茎因子SOX2表达增强。这些
新的见解提出了A3B激活可能使EoC CSCs对PARPI敏感的可能性。我们的中心假设
EoC CSCs维持较低的A3B水平,以避免过度的DNA损伤,从而抵消其影响
帕尔皮的。这项研究的总体目标是剖析A3B和DNA脱氨的机制
在EoC CSC中规范CSC的维护并促进对PARPI的响应。我们将在中讨论我们的假设
两个具体目标:1)确定修饰的A3B活性是否会使CSCs对PARPI联合治疗敏感,
2)明确A3B调节EoC CSCs对PARP抑制剂反应的新机制。我们会
在患者衍生的器官模型中进行A3B过度表达研究,并综合评估变化
在EoC中,CSC的职能和对PARPI的回应。从机制上讲,我们将评估DNA损伤途径,
单独和联合过表达A3B的CSCs的染色体异常和单链DNA断裂水平
用PARPI治疗。此外,A3B调节CSC对PARPI反应的分子机制
还将接受检查。这项创新的研究将提高我们对A3B如何使EoC CSCs敏感的理解
PARPI通过促进DNA损伤和发现有价值的新治疗靶点预防卵巢癌
旧病复发。这些机制可能广泛适用于其他由CSC驱动的恶性肿瘤。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Qingfei Jiang其他文献
Qingfei Jiang的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Qingfei Jiang', 18)}}的其他基金
Examine the function of APOBEC3B in epithelial ovarian cancer stem cells
检查 APOBEC3B 在上皮性卵巢癌干细胞中的功能
- 批准号:
10580076 - 财政年份:2022
- 资助金额:
$ 7.9万 - 项目类别:
Investigating the role of epitranscriptomic A-to-I RNA editing in T-cell acute lymphoblastic leukemia
研究表观转录组 A-to-I RNA 编辑在 T 细胞急性淋巴细胞白血病中的作用
- 批准号:
10220900 - 财政年份:2019
- 资助金额:
$ 7.9万 - 项目类别:
相似海外基金
Investigating the Adoption, Actual Usage, and Outcomes of Enterprise Collaboration Systems in Remote Work Settings.
调查远程工作环境中企业协作系统的采用、实际使用和结果。
- 批准号:
24K16436 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
Grant-in-Aid for Early-Career Scientists
WELL-CALF: optimising accuracy for commercial adoption
WELL-CALF:优化商业采用的准确性
- 批准号:
10093543 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
Collaborative R&D
Unraveling the Dynamics of International Accounting: Exploring the Impact of IFRS Adoption on Firms' Financial Reporting and Business Strategies
揭示国际会计的动态:探索采用 IFRS 对公司财务报告和业务战略的影响
- 批准号:
24K16488 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
Grant-in-Aid for Early-Career Scientists
ERAMET - Ecosystem for rapid adoption of modelling and simulation METhods to address regulatory needs in the development of orphan and paediatric medicines
ERAMET - 快速采用建模和模拟方法的生态系统,以满足孤儿药和儿科药物开发中的监管需求
- 批准号:
10107647 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
EU-Funded
Assessing the Coordination of Electric Vehicle Adoption on Urban Energy Transition: A Geospatial Machine Learning Framework
评估电动汽车采用对城市能源转型的协调:地理空间机器学习框架
- 批准号:
24K20973 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
Grant-in-Aid for Early-Career Scientists
Ecosystem for rapid adoption of modelling and simulation METhods to address regulatory needs in the development of orphan and paediatric medicines
快速采用建模和模拟方法的生态系统,以满足孤儿药和儿科药物开发中的监管需求
- 批准号:
10106221 - 财政年份:2024
- 资助金额:
$ 7.9万 - 项目类别:
EU-Funded
De-Adoption Beta-Blockers in patients with stable ischemic heart disease without REduced LV ejection fraction, ongoing Ischemia, or Arrhythmias: a randomized Trial with blinded Endpoints (ABbreviate)
在没有左心室射血分数降低、持续性缺血或心律失常的稳定型缺血性心脏病患者中停用β受体阻滞剂:一项盲法终点随机试验(ABbreviate)
- 批准号:
481560 - 财政年份:2023
- 资助金额:
$ 7.9万 - 项目类别:
Operating Grants
Our focus for this project is accelerating the development and adoption of resource efficient solutions like fashion rental through technological advancement, addressing longer in use and reuse
我们该项目的重点是通过技术进步加快时装租赁等资源高效解决方案的开发和采用,解决更长的使用和重复使用问题
- 批准号:
10075502 - 财政年份:2023
- 资助金额:
$ 7.9万 - 项目类别:
Grant for R&D
Engage2innovate – Enhancing security solution design, adoption and impact through effective engagement and social innovation (E2i)
Engage2innovate — 通过有效参与和社会创新增强安全解决方案的设计、采用和影响 (E2i)
- 批准号:
10089082 - 财政年份:2023
- 资助金额:
$ 7.9万 - 项目类别:
EU-Funded
Collaborative Research: SCIPE: CyberInfrastructure Professionals InnoVating and brOadening the adoption of advanced Technologies (CI PIVOT)
合作研究:SCIPE:网络基础设施专业人员创新和扩大先进技术的采用 (CI PIVOT)
- 批准号:
2321091 - 财政年份:2023
- 资助金额:
$ 7.9万 - 项目类别:
Standard Grant














{{item.name}}会员




