Integrating Forces and Signals in Tissue-Level Patterning of the Developing Digestive Tract
将力和信号整合到发育中消化道的组织水平模式中
基本信息
- 批准号:9244822
- 负责人:
- 金额:$ 35.16万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2016
- 资助国家:美国
- 起止时间:2016-04-01 至 2021-01-31
- 项目状态:已结题
- 来源:
- 关键词:ArchitectureAutomobile DrivingBMP2 geneBiophysicsColonComputer SimulationCongenital AbnormalityDefectDevelopmentDorsalElastic TissueEpithelialEpitheliumEsophagusGastrocoeleGastrointestinal tract structureGenerationsGenesGeneticGrowthGrowth FactorHindgutIntestinesLarge IntestineLeadLengthLigandsLightMaintenanceMeasurementMeasuresMediatingMesenteryMorphogenesisMorphologyNutrientPatternPharmaceutical PreparationsPrimitive foregut structureProcessProteinsQuailRegulationRoleShapesSignal TransductionSmooth MuscleStretchingStructureSystemTestingThickTimeTissuesTubeWorkbasebiophysical propertiesexperimental studymathematical modelmechanical forcepublic health relevancereceptorzebra finch
项目摘要
DESCRIPTION (provided by applicant): This study builds on earlier work in the lab establishing roles for physical forces in chick gut morphogenesis. One critical aspect of gut formation that is largely driven by mechanical forces is the coiling of the loops of the intestine.
This process occurs when the primitive gut tube grows faster than the attached dorsal mesentery, an elastic tissue that gets stretched and hence, exerts an isotropic force on the gut tube along its length. The tightness of the coiling of the gut is proportional to this force and hence, to the difference in the relaxed lengths of the gut tube and dorsal mesentery. Thus, the differential growth of the two tissues determines the looping pattern of the gut. A key question thus becomes, what establishes the different in growth rates of these tissues? In Aim 1, we investigate the role of the secreted protein BMP2 in establishing this differential growth. BMP2 is
expressed in the developing gut. Blocking BMP2 function causes a decrease in looping, while the excessive BMP activity increases the number and curvature of the loops. The first aim will quantify the effect of BMP activity on morphometric and biophysical parameters. Computational modeling will be used to identify the key biophysical determinants in this system. A second aspect of gut development, that is also dependent on physical forces, is the buckling of the intestinal lumen to generate villi. In this process, buckling forces are generated through confined
growth of the epithelium at a time when expansion is constrained by the adjacent differentiating smooth muscle. In other segments of the gut (esophagus, colon, etc.) there are significant differences in the thickness and timing of smooth muscle differentiation. Experiments in Aim 2 determine the extent to which these differences in smooth muscle architecture and dynamics are responsible for the distinct epithelial morphology of the fore-and hind guts. Drugs will be employed to block smooth muscle differentiation to test their necessity. Morphometric and biophysical parameters will be measured and entered into computational models to test the degree to which epithelial morphology can be entirely explained on this basis.
项目成果
期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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{{ truncateString('CLIFFORD J. TABIN', 18)}}的其他基金
Signals and mechanical forces controlling radial gut morphogenesis
控制径向肠道形态发生的信号和机械力
- 批准号:
10684660 - 财政年份:2016
- 资助金额:
$ 35.16万 - 项目类别:
Signals and mechanical forces controlling radial gut morphogenesis
控制径向肠道形态发生的信号和机械力
- 批准号:
10442794 - 财政年份:2016
- 资助金额:
$ 35.16万 - 项目类别:
A genetic system for the study of vertebrate limb regeneration
用于研究脊椎动物肢体再生的遗传系统
- 批准号:
8121590 - 财政年份:2010
- 资助金额:
$ 35.16万 - 项目类别:
A genetic system for the study of vertebrate limb regeneration
用于研究脊椎动物肢体再生的遗传系统
- 批准号:
7963530 - 财政年份:2010
- 资助金额:
$ 35.16万 - 项目类别:
The Roles of BMP Genes and Morphogenesis of the Appendicular and Dermal Skeletons
BMP 基因的作用以及阑尾和真皮骨骼的形态发生
- 批准号:
7432430 - 财政年份:2007
- 资助金额:
$ 35.16万 - 项目类别:
Lineage and cell migration in patterning the limb primordium
肢体原基模式中的谱系和细胞迁移
- 批准号:
8291903 - 财政年份:2005
- 资助金额:
$ 35.16万 - 项目类别:
Lineage and cell migration in patterning the limb primordium
肢体原基模式中的谱系和细胞迁移
- 批准号:
8460894 - 财政年份:2005
- 资助金额:
$ 35.16万 - 项目类别:
Lineage and cell migration in patterning the limb primordium
肢体原基模式中的谱系和细胞迁移
- 批准号:
8680266 - 财政年份:2005
- 资助金额:
$ 35.16万 - 项目类别:
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