Elucidating How Primary Cilia Regulate Hedgehog Signaling by Super-Resolution Microscopy

通过超分辨率显微镜阐明初级纤毛如何调节 Hedgehog 信号传导

基本信息

  • 批准号:
    10436146
  • 负责人:
  • 金额:
    $ 24.83万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-05-18 至 2024-04-30
  • 项目状态:
    已结题

项目摘要

Abstract Hedgehog signals are the key regulators of embryonic patterning and adult tissue homeostasis. Consequently, defects in Hedgehog signaling can cause developmental diseases, congenital heart disease, and cancers such as basal cell carcinoma. There is an urgent need to understand the molecular mechanisms that underlie the modulation of Hedgehog signaling pathway for its potential preventative and therapeutic value. It is known ver- tebrate Hedgehog signaling relies on the ciliary trafficking of Hedgehog signaling receptors, among which smoothened (SMO) is the central positive mediator of Hedgehog signaling. If mutations occur in either intrafla- gellar transporters (IFTs), or in the ciliary transition zone, SMO activities can be severely disrupted. However, the molecular mechanism of how IFT particles and transition zone regulate trafficking of SMO is currently un- known. Determination of the molecular regulation mechanisms is the objective of this application. Our prelimi- nary data acquired by Stochastic Optical Reconstruction Microscopy (STORM) showed the colocalization of transition zone proteins with SMO and IFT88, suggesting that transition zone proteins and IFT particles interact with SMO. Based on previous studies and our own primary data, my central hypothesis is that the transition zone serves as a checkpoint for Hedgehog signaling receptors, and IFTs help Hedgehog signaling receptors cross the transition zone. This transition zone checkpoint model represents a novel mechanism for the control of cilium trafficking and the cross-interaction between different ciliary cargos. It could potentially allow new ap- proaches to manipulate Hedgehog signals, and underlie the foundation for treatments of diseases caused by defects in Hedgehog signaling. To approach to the project, I plan to map SMO molecules and IFT particles in the transition zone using multicolor 3D STORM. It will reveal the spatial relationship between SMO molecules and these ciliary components at a resolution of ~15 nm. Algorithms will be developed to reduce the uncertainty of the spatial easements caused by structural heterogeneity and immunostaining, providing a ~ 5nm precision of the distance between investigated proteins, indicating protein-protein interaction. Equally important as the static structural study, I also plan to detect the interactions among SMO molecules, IFT particles, and transition zone proteins dynamically using single-particle tracking and photoconversion imaging. The proposed project will not only offer new insights into the molecular mechanisms of Hedgehog signaling regulation, but also ad- vance a suite of microscopy-based technologies and algorithms that can be broadly applied to the fields of cell signaling and structural biology. Furthermore, the results are expected to have broad impact, because the reg- ulatory components to be identified by this project will provide new mechanisms and new drug screen for pre- ventive and therapeutic interventions. 1
摘要

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Local enrichment of HP1alpha at telomeres alters their structure and regulation of telomere protection.
  • DOI:
    10.1038/s41467-018-05840-y
  • 发表时间:
    2018-09-04
  • 期刊:
  • 影响因子:
    16.6
  • 作者:
    Chow TT;Shi X;Wei JH;Guan J;Stadler G;Huang B;Blackburn EH
  • 通讯作者:
    Blackburn EH
Nanotopography Enhances Dynamic Remodeling of Tight Junction Proteins through Cytosolic Liquid Complexes.
  • DOI:
    10.1021/acsnano.0c04866
  • 发表时间:
    2020-10-27
  • 期刊:
  • 影响因子:
    17.1
  • 作者:
    Huang X;Shi X;Hansen ME;Setiady I;Nemeth CL;Celli A;Huang B;Mauro T;Koval M;Desai TA
  • 通讯作者:
    Desai TA
Expansion Microscopy of Ciliary Proteins.
纤毛蛋白的放大显微镜。
Cationic peptides erase memories by removing synaptic AMPA receptors through endophilin-mediated endocytosis.
阳离子肽通过内皮素介导的内吞作用去除突触 AMPA 受体,从而消除记忆。
  • DOI:
    10.21203/rs.3.rs-3559525/v1
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Stokes,Eric;Zhuang,Yinyin;Toledano,Michael;Vasquez,Jose;Azouz,Ghalia;Hui,May;Tyler,Isabella;Shi,Xiaoyu;Aoto,Jason;Beier,KevinT
  • 通讯作者:
    Beier,KevinT
Polarized endosome dynamics engage cytoplasmic Par-3 that recruits dynein during asymmetric cell division.
  • DOI:
    10.1126/sciadv.abg1244
  • 发表时间:
    2021-06
  • 期刊:
  • 影响因子:
    13.6
  • 作者:
    Zhao X;Garcia JQ;Tong K;Chen X;Yang B;Li Q;Dai Z;Shi X;Seiple IB;Huang B;Guo S
  • 通讯作者:
    Guo S
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Xiaoyu Shi其他文献

Xiaoyu Shi的其他文献

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{{ truncateString('Xiaoyu Shi', 18)}}的其他基金

Gel-based Optical-isolation Single-Cell 3D Spatial Multiomics
基于凝胶的光隔离单细胞 3D 空间多组学
  • 批准号:
    10473394
  • 财政年份:
    2022
  • 资助金额:
    $ 24.83万
  • 项目类别:
Elucidating How Primary Cilia Regulate Hedgehog Signaling by Super-Resolution Microscopy
通过超分辨率显微镜阐明初级纤毛如何调节 Hedgehog 信号传导
  • 批准号:
    10152612
  • 财政年份:
    2018
  • 资助金额:
    $ 24.83万
  • 项目类别:
Design of a high-sensitivity lipid particle method for cell separation
一种高灵敏度脂质颗粒细胞分离方法的设计
  • 批准号:
    8784108
  • 财政年份:
    2014
  • 资助金额:
    $ 24.83万
  • 项目类别:
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