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Lu S, Seong J, Wang Y, Chang SC, Eichorst JP, Ouyang M, Li JYS, Chien S, Wang Y. Decipher the dynamic coordination between enzymatic activity and structural modulation at focal adhesions in living cells. Sci Rep 2014; 4:5756. [PMID: 25056908 PMCID: PMC4108961 DOI: 10.1038/srep05756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 06/23/2014] [Indexed: 02/06/2023] Open
Abstract
Focal adhesions (FAs) are dynamic subcellular structures crucial for cell adhesion, migration and differentiation. It remains an enigma how enzymatic activities in these local complexes regulate their structural remodeling in live cells. Utilizing biosensors based on fluorescence resonance energy transfer (FRET), we developed a correlative FRET imaging microscopy (CFIM) approach to quantitatively analyze the subcellular coordination between the enzymatic Src activation and the structural FA disassembly. CFIM reveals that the Src kinase activity only within the microdomain of lipid rafts at the plasma membrane is coupled with FA dynamics. FA disassembly at cell periphery was linearly dependent on this raft-localized Src activity, although cells displayed heterogeneous levels of response to stimulation. Within lipid rafts, the time delay between Src activation and FA disassembly was 1.2 min in cells seeded on low fibronectin concentration ([FN]) and 4.3 min in cells on high [FN]. CFIM further showed that the level of Src-FA coupling, as well as the time delay, was regulated by cell-matrix interactions, as a tight enzyme-structure coupling occurred in FA populations mediated by integrin αvβ₃, but not in those by integrin α₅β₁. Therefore, different FA subpopulations have distinctive regulation mechanisms between their local kinase activity and structural FA dynamics.
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Affiliation(s)
- Shaoying Lu
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0435
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Jihye Seong
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801
- Current address: Korea Institute of Science and Technology (KIST), Seoul, South Korea
| | - Yi Wang
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Shiou-chi Chang
- Department of Chemical Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - John Paul Eichorst
- Center of Biophysics and Computational Biology, Beckman Institute for Advanced Science and Technology, Department of Molecular and Integrative Physiology and, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Mingxing Ouyang
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0435
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Julie Y.-S. Li
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0435
| | - Shu Chien
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0435
| | - Yingxiao Wang
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093-0435
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801
- Center of Biophysics and Computational Biology, Beckman Institute for Advanced Science and Technology, Department of Molecular and Integrative Physiology and, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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Kuo CYC, Li JYS, Lee OKS, Chien S. Human Mesenchymal Stem Cell Modulates the Stretch‐induced Inflammatory Response in Bronchial Epithelial Cells. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.658.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Carol Y.-C. Kuo
- Department of Bioengineering and Institute of Engineering in MedicineUniversity of CaliforniaSan Diego, San DiegoCA
- Institute of Clinical MedicineNational Yang-Ming UniversityTaipeiTaiwan
| | - Julie Y.-S. Li
- Department of Bioengineering and Institute of Engineering in MedicineUniversity of CaliforniaSan Diego, San DiegoCA
| | - Oscar K.-S. Lee
- Institute of Clinical MedicineNational Yang-Ming UniversityTaipeiTaiwan
| | - Shu Chien
- Department of Bioengineering and Institute of Engineering in MedicineUniversity of CaliforniaSan Diego, San DiegoCA
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Wang Y, Jin G, Miao H, Li JYS, Usami S, Chien S. Integrins regulate VE-cadherin and catenins: dependence of this regulation on Src, but not on Ras. Proc Natl Acad Sci U S A 2006; 103:1774-9. [PMID: 16446427 PMCID: PMC1413667 DOI: 10.1073/pnas.0510774103] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Adhesions of cells to extracellular matrix and adjacent cells are mediated by integrins and VE-cadherin, respectively. Although these adhesion processes play crucial roles in vascular cell migration and angiogenesis, it remains unclear as to how they are coordinated to regulate cellular functions. We report here that integrin engagement by treating bovine endothelial aortic cell monolayers with beads coated with fibronectin (Fn) led to disruption of the VE-cadherin-containing adherens junctions. This disruption was accompanied by increases of tyrosine phosphorylation of beta-catenin, gamma-catenin, and p120ctn, as well as the dissociation of alpha-catenin and gamma-catenin from VE-cadherin. We applied a membrane-targeted Src reporter based on the fluorescence resonance energy transfer technique to visualize the dynamic Src activation at subcellular levels in live cells. The integrin engagement induced by Fn-coated beads caused the activation of Src around the beads and at adherens junctions, which are subsequently disrupted. The inhibition of Src with PP1 blocked the effects of integrin engagement on adherens junctions. Although Ras can also modulate adherens junctions, the resulting patterns of phosphorylation and association of junction proteins were distinct from those induced by integrin engagement. The inhibition of Ras by RasN17 did not rescue the disruption of adherens junctions induced by integrin engagement or by Src activation. Integrin engagement by Fn-coated beads also induced a significant alteration of cortical actin filaments at adherens junctions. The results indicate that integrin engagement disrupts VE-cadherin-containing adherens junctions via the activation of Src, but not Ras, possibly as a result of modulation of the actin network.
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Affiliation(s)
- Yingxiao Wang
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
| | - Gang Jin
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
| | - Hui Miao
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
| | - Julie Y.-S. Li
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
| | - Shunichi Usami
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
| | - Shu Chien
- Departments of Bioengineering and Medicine and The Whitaker Institute of Biomedical Engineering, University of California at San Diego, La Jolla, CA 92093
- To whom correspondence should be addressed. E-mail:
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