Modeling the molecular and cellular mechanisms of TE birth defects in animals
动物 TE 出生缺陷的分子和细胞机制建模
基本信息
- 批准号:10174985
- 负责人:
- 金额:$ 32.4万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-08-15 至 2022-05-31
- 项目状态:已结题
- 来源:
- 关键词:Animal ModelAnimalsAutomobile DrivingBirthBreathingCandidate Disease GeneCell Culture TechniquesCell physiologyClustered Regularly Interspaced Short Palindromic RepeatsComplementCongenital AbnormalityCystic kidneyDataDefectDevelopmentDiagnosisDifferentiation and GrowthEmbryoEpithelialErinaceidaeEsophageal AtresiaEsophageal TissueEsophagusEtiologyEventExhibitsFetal DevelopmentGene MutationGenesGeneticGoalsHumanHuman GeneticsLeadLifeMediatingMesenchymalModelingMolecularMorphogenesisMusMutationNewborn InfantOperative Surgical ProceduresOrthologous GenePathway interactionsPatient CarePatientsPatternPhenotypePrimitive foregut structureProcessRegulator GenesRoleStructureSystemTestingTimeTracheaTracheal AtresiaTracheoesophageal FistulaTubeWorkXenopuscomorbidityfeedinggene functiongenetic testinggenetic variantgenome editinghuman modelhuman pluripotent stem cellimprovedinnovationknock-downmaturity onset diabetes of the youngmodel organisms databasesmolecular modelingmouse geneticsmutantneonatal periodnovelpreventtranscription factortranscriptome
项目摘要
The trachea and esophagus (TE) arise from a single foregut tube in early fetal development. Defects in TE
morphogenesis result in a spectrum of life-threatening congenital tracheo-esophageal birth defects (TEDs) that
prevent proper breathing or feeding in newborns. The goal of this project is to determine the molecular
and cellular basis of TEDs using animal models. Corrected surgically in the neonatal period, TEDs are
often associated with long-term co-morbidity. Occurring in ~1:3500 births, the etiology of TEDs is poorly
understood. Although evidence indicates a major genetic component, known mutations in 14 genes account for
only 12% of patients with esophageal atresia and/or tracheoesophageal fistula (EA/TEF) [1], while the genetic
basis of more rare and lethal tracheal atresia (TA) is unknown. Sporadic mutations in ~25 additional genes
have been associated with EA/TEF patients, but these remain to be validated. Mouse has proven to be
effective for modeling TEDs, and indicates a key role for the Hedgehog (HH) and BMP pathways, with mutants
exhibiting defects similar to human patient. Despite this progress there are a number of limitations in the field.
Mouse is a relatively low throughput model and only a few of candidate mutations from patients have been
validated to date. Second, while HH and BMP are implicated TE morphogenesis the cellular mechanisms they
regulate, to control separation of the foregut tube into esophagus and trachea are unknown. This is in part
because these events occur early in fetal development when internally developing mouse embryos are
challenging to manipulate and visualize. In preliminary data we have established Xenopus embryos as an
innovative high-throughput model to complement mouse genetics, and have begun to identify novel and
conserved cellular mechanisms controlling TE morphogenesis. These studies lead us to hypothesize that HH
and BMP interact to regulate the cellular processes of TE morphogenesis and that mutations in these
pathways result in a spectrum of phenotypes that model human TEDs. This project will define the
molecular and cellular mechanisms of TE development, define the structural basis of TEDs and test putative
TED-causing mutations from patients (project-1). Ultimately this will improve diagnosis, enhance patient care,
and inform strategies to generate TE tissue from human pluripotent stem cells (hPSCs) (project-3).
Aim 1 Characterize the cellular mechanisms of TE morphogenesis in animals.
Aim 2 Determine how defects in HH-Gli and BMP-Sox2 pathways disrupt TE morphogenesis.
Aim 3 Validate candidate TED-causing mutations in Xenopus and mouse.
气管和食管(TE)在早期胎儿发育中由单个前肠管产生。
形态发生导致一系列危及生命的先天性气管食管出生缺陷(TEDs),
阻止新生儿的正常呼吸或喂养。该项目的目标是确定
和细胞基础的TED使用动物模型。在新生儿期手术纠正,TED是
通常与长期并发症有关,在约1:3500的分娩中,TED的病因学不太清楚,
理解。尽管有证据表明这是一个主要的遗传成分,但14个基因中的已知突变解释了
只有12%的患者患有食管闭锁和/或气管食管瘘(EA/TEF)[1],而遗传性
更罕见和致命的气管闭锁(TA)的基础尚不清楚。
与EA/TEF患者有关,但这些仍有待验证。
有效的建模TED,并指出了刺猬(HH)和BMP途径的关键作用,突变体
表现出与人类患者相似的缺陷。尽管有了这一进展,但该领域仍存在许多限制。
小鼠是一种相对低通量的模型,只有少数来自患者的候选突变已经被发现。
其次,虽然HH和BMP涉及TE形态发生,但它们的细胞机制
调节,以控制分离的前肠管进入食道和气管是未知的。这部分是
因为这些事件发生在胎儿发育的早期,当内部发育的小鼠胚胎被
具有挑战性的操作和可视化。在初步数据中,我们已经建立了非洲爪蟾胚胎作为一个
创新高通量模型,以补充小鼠遗传学,并已开始确定新的,
保守的细胞机制控制TE形态发生。这些研究使我们假设HH
和BMP相互作用以调节TE形态发生的细胞过程,
途径导致一系列的表型,模拟人类TED。这个项目将定义
TE发展的分子和细胞机制,定义TEDs的结构基础,并测试推定的
TED-从病人身上引起突变(项目-2001)。最终这将改善诊断,加强病人护理,
并为从人类多能干细胞(hPSC)产生TE组织的策略提供信息(项目-BP 3)。
目的1研究动物TE形态发生的细胞学机制。
目的2确定HH-β Gli和BMP-β Sox 2通路的缺陷如何破坏TE形态发生。
目的在非洲爪蟾和小鼠中寻找导致TED-A突变的候选基因.
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)
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Aaron M Zorn其他文献
Mechanism and in vitro reconstruction of mammalian trachea-esophageal development
哺乳动物气管食管发育机制及体外重建
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Lu Han;Praneet Chaturvedi;Keishi Kishimoto;Hiroyuki Koike;Talia Nasr;Kentaro Iwasawa;Kirsten Giesbrecht;Phillip C Witcher;Alexandra Eicher;Lauren Haines;Yarim Lee;John M Shannon;Mitsuru Morimoto;James M Wells;Takanori Takebe;Aaron M Zorn;Keishi Kishimoto - 通讯作者:
Keishi Kishimoto
Understanding and recapitulating trachea-esophageal development
了解并概括气管食管发育
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Keishi Kishimoto;Aaron M Zorn;Mitsuru Morimoto - 通讯作者:
Mitsuru Morimoto
Aaron M Zorn的其他文献
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{{ truncateString('Aaron M Zorn', 18)}}的其他基金
Sox Proteins Modulate Genomic Specificity of B-catenin Regulated Transcription in the Developing Gut
Sox 蛋白调节发育中肠道中 B-连环蛋白调节转录的基因组特异性
- 批准号:
10540791 - 财政年份:2021
- 资助金额:
$ 32.4万 - 项目类别:
Sox Proteins Modulate Genomic Specificity of B-catenin Regulated Transcription in the Developing Gut
Sox 蛋白调节发育中肠道中 B-连环蛋白调节转录的基因组特异性
- 批准号:
10115171 - 财政年份:2021
- 资助金额:
$ 32.4万 - 项目类别:
Sox Proteins Modulate Genomic Specificity of B-catenin Regulated Transcription in the Developing Gut
Sox 蛋白调节发育中肠道中 B-连环蛋白调节转录的基因组特异性
- 批准号:
10328965 - 财政年份:2021
- 资助金额:
$ 32.4万 - 项目类别:
Developmental Mechanisms of Trachea-Esophageal Birth Defects
气管食管先天缺陷的发育机制
- 批准号:
10174982 - 财政年份:2017
- 资助金额:
$ 32.4万 - 项目类别:
Developmental Mechanisms of Trachea-Esophageal Birth Defects
气管食管先天缺陷的发育机制
- 批准号:
10174983 - 财政年份:2017
- 资助金额:
$ 32.4万 - 项目类别:
Project-2: Modeling TE birth defects in animals
项目 2:模拟动物 TE 出生缺陷
- 批准号:
10458161 - 财政年份:2017
- 资助金额:
$ 32.4万 - 项目类别:
Project-2: Modeling TE birth defects in animals
项目 2:模拟动物 TE 出生缺陷
- 批准号:
10647834 - 财政年份:2017
- 资助金额:
$ 32.4万 - 项目类别:
Osr transcription factors regulate embryonic lung development
Osr转录因子调节胚胎肺发育
- 批准号:
8343489 - 财政年份:2012
- 资助金额:
$ 32.4万 - 项目类别:
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