A pro-metastatic secretory program activated by epithelial-to-mesenchymal transition
由上皮间质转化激活的促转移分泌程序
基本信息
- 批准号:10294733
- 负责人:
- 金额:$ 11.19万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-09-15 至 2023-08-31
- 项目状态:已结题
- 来源:
- 关键词:AchievementActinsAddressAdenocarcinoma CellAerosolsAllelesApicalAwardBeliefBiogenesisBiologicalCancer BiologyCancer CenterCancer EtiologyCell LineCell SurvivalCell membraneCellsCellular biologyClinicalDataDisciplineEndocytic VesicleExocytosisFocal AdhesionsGenetic TranscriptionGrowthGuanosine Triphosphate PhosphohydrolasesHot SpotHumanImmunocompetentInvadedKRASG12DKineticsKnowledgeLaboratoriesLentivirusLung AdenocarcinomaMalignant - descriptorMalignant NeoplasmsMalignant neoplasm of lungMedical centerMentorsMicroRNAsMicrotubulesMoldsMolecularMonomeric GTP-Binding ProteinsMusNeoplasm MetastasisNew MexicoOrganellesPaperPathway interactionsPeer ReviewPhysiciansPositioning AttributeProcessPropertyProtein SecretionProteinsProxyReceptor Protein-Tyrosine KinasesResearchResearch PersonnelRestScientistSecretory VesiclesSignal TransductionSiteSourceStainsStructureSumSurvival RateTestingThe Cancer Genome AtlasTissuesTrainingTraining ProgramsTranslatingUniversitiesUrsidae FamilyVesicleVimentinWorkactionable mutationactivating transcription factoranticancer researchbasecancer cellcareer developmentcell motilitycellular imagingcohortcongeniccytokinedesignepithelial to mesenchymal transitionhuman modelimaging studyinhibitor/antagonistloss of functionmouse modelpaxillinpost-doctoral trainingprogramsrab GTP-Binding Proteinsskillssmall hairpin RNAtargeted cancer therapytherapeutically effectivetraffickingtranscriptometumortumor microenvironmenttumor-immune system interactionstumorigenicvesicle transport
项目摘要
Project Summary/Abstract
Candidate: Dr. Xiao has received broad training in cell and cancer biology, including postdoctoral training at UT-
Southwestern Medical Center (UTSW) and MD Anderson Cancer Center (MDACC). He seeks to understand how
epithelial-to-mesenchymal transition (EMT) drives malignant secretion to promote lung cancer metastasis. Dr. Xiao
is a highly productive investigator, with 4 first-authored peer-reviewed papers. As recognition of his achievements,
he received numerous awards during his doctoral and postdoctoral training.
Career Development/Training: Dr. Xiao’s primary mentor is Dr. Jonathan Kurie, a physician-scientist with
expertise in cancer biology and mouse modeling of human lung adenocarcinoma (LUAD). His co-mentor is Dr.
Sandra Schmid, who was his mentor at UTSW and is a leader in the field of endocytic vesicle trafficking. Additional
input will come from Dr. Angela Wandinger-Ness (University of New Mexico), who identified Rab GTPases as
regulators of endosomal trafficking and is developing GTPase-targeted therapies for cancer. These investigators
have designed a training program centered on their key scientific disciplines that will strengthen Dr. Xiao’s abilities
in their respective fields and provide the skills needed for a smooth transition to independence.
Research: EMT induction in cancer cells initiates the metastatic cascade by promoting motility and invasiveness
through cell-autonomous mechanisms. Our group has shown that EMT also increases the secretion of proteins
that maintain LUAD cell viability and create an immunosuppressive and fibrotic tumor microenvironment (TME)
that facilitates LUAD metastasis. These findings are the basis for our hypothesis that EMT promotes LUAD
metastasis through dual cell-autonomous and non-autonomous mechanisms. The objective of my proposal is to
elucidate the molecular underpinnings of EMT-dependent secretion in LUAD. In my preliminary results, I show that
the EMT-activating transcription factor ZEB1 upregulates the expression of Rab6A and Rab8A by silencing
microRNAs that target these effectors. I show that ZEB1 requires Rab6A and Rab8A to drive polarized trafficking
of secretory vesicles toward the leading edge of migrating LUAD cells, to increase cytokine secretion, to generate
an immunosuppressive TME, and to promote LUAD cell migration, invasion, and metastasis. Because secretory
vesicle exocytosis occurs at hot spots juxtaposed to focal adhesions, I hypothesize that ZEB1 coordinately
regulates anterograde trafficking of secretory vesicles and remodeling of actin-based cytoskeletal structures to
initiate polarized secretion of pro-tumorigenic effector proteins that drive LUAD progression. I will test this
hypothesis by determining how ZEB1 coordinately regulates anterograde vesicle trafficking and cytoskeletal
remodeling to drive polarized secretion of pro-tumorigenic effector proteins and LUAD progression.
In sum, my proposal will address the clinical problem of LUAD metastasis. The novelty rests in preliminary results
that demonstrate a transcriptional governance of polarized vesicular transport, providing the potential to target
ZEB1-driven secretory pathways for the purpose of blocking metastasis in LUAD.
项目摘要/摘要
候选人:肖博士接受过细胞和癌症生物学方面的广泛培训,包括在 UT-
西南医学中心 (UTSW) 和 MD 安德森癌症中心 (MDACC)。 他试图了解如何
上皮间质转化(EMT)驱动恶性分泌,促进肺癌转移。 肖博士
是一位高效的研究人员,拥有 4 篇第一作者的同行评审论文。 作为对他成就的认可,
他在博士和博士后培训期间获得了无数奖项。
职业发展/培训:肖博士的主要导师是乔纳森·库里博士,他是一位医师兼科学家,
癌症生物学和人肺腺癌 (LUAD) 小鼠模型方面的专业知识。 他的共同导师是博士。
桑德拉·施密德 (Sandra Schmid) 是他在 UTSW 的导师,也是内吞囊泡贩运领域的领导者。 额外的
输入信息将来自 Angela Wandinger-Ness 博士(新墨西哥大学),她将 Rab GTPases 确定为
内体运输的调节者,正在开发针对癌症的 GTP 酶靶向疗法。 这些调查员
设计了一个以他们的关键科学学科为中心的培训计划,以加强肖博士的能力
在各自的领域,并提供顺利过渡到独立所需的技能。
研究:癌细胞中的 EMT 诱导通过促进运动性和侵袭性启动转移级联反应
通过细胞自主机制。 我们的小组已经表明,EMT 还可以增加蛋白质的分泌
维持 LUAD 细胞活力并创造免疫抑制和纤维化肿瘤微环境 (TME)
促进 LUAD 转移。 这些发现是我们假设 EMT 促进 LUAD 的基础
通过双细胞自主和非自主机制进行转移。 我提案的目标是
阐明 LUAD 中 EMT 依赖性分泌的分子基础。 在我的初步结果中,我表明
EMT 激活转录因子 ZEB1 通过沉默上调 Rab6A 和 Rab8A 的表达
针对这些效应器的 microRNA。 我表明 ZEB1 需要 Rab6A 和 Rab8A 来驱动极化贩运
分泌囊泡向迁移 LUAD 细胞的前沿移动,以增加细胞因子分泌,产生
免疫抑制 TME,并促进 LUAD 细胞迁移、侵袭和转移。 因为分泌
囊泡胞吐作用发生在与粘着斑并置的热点处,我假设 ZEB1 协调地
调节分泌囊泡的顺行运输和基于肌动蛋白的细胞骨架结构的重塑
启动促肿瘤效应蛋白的极化分泌,从而驱动 LUAD 进展。 我会测试这个
通过确定 ZEB1 如何协调调节顺行囊泡运输和细胞骨架来提出假设
重塑以驱动促肿瘤效应蛋白的极化分泌和 LUAD 进展。
总之,我的建议将解决 LUAD 转移的临床问题。 新颖之处在于初步结果
展示了极化囊泡运输的转录调控,提供了靶向的潜力
ZEB1 驱动的分泌途径,用于阻断 LUAD 的转移。
项目成果
期刊论文数量(0)
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