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.
项目总结/摘要
候选人:肖博士在细胞和癌症生物学方面接受过广泛的培训,包括在UT-100接受博士后培训。
西南医学中心(UTSW)和MD安德森癌症中心(MDACC)。
上皮细胞间质转化(EMT)驱动恶性分泌,促进肺癌转移。肖博士
是一位高效率的研究者,有4篇第一作者的同行评审论文。2作为对他成就的认可,
他在博士和博士后培训期间多次获奖。
职业发展/培训:肖博士的主要导师是Jonathan Kurie博士,他是一位内科医生和科学家,
在肿瘤生物学和人肺腺癌小鼠模型(LUAD)方面的专业知识。
Sandra Schmid是他在UTSW的导师,也是内吞囊泡运输领域的领导者。
输入将来自Angela Wandinger-Wandinger Ness博士(新墨西哥州大学),他将Rab GTP酶确定为
内体运输的调节剂,并正在开发针对癌症的GT3-β靶向疗法。这些研究人员
设计了一个以关键科学学科为中心的培训计划,以增强肖博士的能力
他们在各自的领域中发挥了重要作用,并提供了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
我们的研究小组已经证明EMT也会增加蛋白质的分泌,
维持LUAD细胞活力并创造免疫抑制和纤维化肿瘤微环境(TME)
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转移。我的建议的目的是
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-1激活转录因子ZEB 1通过沉默Rab 6A和Rab 8A的表达上调Rab 6A和Rab 8A的表达,
我发现ZEB 1需要Rab 6A和Rab 8A来驱动极化运输,
分泌囊泡朝向迁移LUAD细胞的前缘,以增加细胞因子分泌,
免疫抑制性TME,并促进LUAD细胞迁移、侵袭和转移。
囊泡胞吐发生在与粘着斑并列的热点,我推测ZEB 1协同
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,
启动促肿瘤发生效应蛋白的极化分泌,驱动LUAD进展。我将测试这个
通过确定ZEB 1如何协调调节顺行囊泡运输和细胞骨架
重塑以驱动促肿瘤发生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。
这表明了极化囊泡运输的转录管理,提供了靶向的潜力,
ZEB 1-β驱动的分泌途径,目的是阻断LUAD中的转移。
项目成果
期刊论文数量(0)
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