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Gu X, Chen X, Zhang X, Liu K, Li JJ, Lv W, Zeng L, Wu M, Zhou W, Wang W, Shi S, Deng Y, Li Y, Gao X, Ju R, Dubrac A, Liu X, Zhang F. Macrophage-induced integrin signaling promotes Schlemm's canal formation to prevent intraocular hypertension and glaucomatous optic neuropathy. Cell Rep 2024; 43:113799. [PMID: 38367239 DOI: 10.1016/j.celrep.2024.113799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 12/13/2023] [Accepted: 01/31/2024] [Indexed: 02/19/2024] Open
Abstract
Schlemm's canal (SC) functions to maintain proper intraocular pressure (IOP) by draining aqueous humor and has emerged as a promising therapeutic target for glaucoma, the second-leading cause of irreversible blindness worldwide. However, our current understanding of the mechanisms governing SC development and functionality remains limited. Here, we show that vitronectin (VTN) produced by limbal macrophages promotes SC formation and prevents intraocular hypertension by activating integrin αvβ3 signaling. Genetic inactivation of this signaling system inhibited the phosphorylation of AKT and FOXO1 and reduced β-catenin activity and FOXC2 expression, thereby causing impaired Prox1 expression and deteriorated SC morphogenesis. This ultimately led to increased IOP and glaucomatous optic neuropathy. Intriguingly, we found that aged SC displayed downregulated integrin β3 in association with dampened Prox1 expression. Conversely, FOXO1 inhibition rejuvenated the aged SC by inducing Prox1 expression and SC regrowth, highlighting a possible strategy by targeting VTN/integrin αvβ3 signaling to improve SC functionality.
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Affiliation(s)
- Xinyu Gu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xun Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xuan Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Keli Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Jing-Jing Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Wenyu Lv
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510060, China
| | - Lei Zeng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Mingjuan Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Weibin Zhou
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510060, China
| | - Weifa Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Shunhua Shi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Yicheng Deng
- School of Medicine, Sun Yat-sen University, Guangzhou 510060, China
| | - Yunhua Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Xinbo Gao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Rong Ju
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Alexandre Dubrac
- Centre de Recherche, CHU St. Justine, Montréal, QC, Canada; Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, QC, Canada
| | - Xialin Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Feng Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China.
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Loffet EA, Durel JF, Gao J, Kam R, Lim H, Nerurkar NL. Elastic fibers define embryonic tissue stiffness to enable buckling morphogenesis of the small intestine. Biomaterials 2023; 303:122405. [PMID: 38000151 PMCID: PMC10842730 DOI: 10.1016/j.biomaterials.2023.122405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/22/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023]
Abstract
During embryonic development, tissues must possess precise material properties to ensure that cell-generated forces give rise to the stereotyped morphologies of developing organs. However, the question of how material properties are established and regulated during development remains understudied. Here, we aim to address these broader questions through the study of intestinal looping, a process by which the initially straight intestinal tube buckles into loops, permitting ordered packing within the body cavity. Looping results from elongation of the tube against the constraint of an attached tissue, the dorsal mesentery, which is elastically stretched by the elongating tube to nearly triple its length. This elastic energy storage allows the mesentery to provide stable compressive forces that ultimately buckle the tube into loops. Beginning with a transcriptomic analysis of the mesentery, we identified widespread upregulation of extracellular matrix related genes during looping, including genes related to elastic fiber deposition. Combining molecular and mechanical analyses, we conclude that elastin confers tensile stiffness to the mesentery, enabling its mechanical role in organizing the developing small intestine. These results shed light on the role of elastin as a driver of morphogenesis that extends beyond its more established role in resisting cyclic deformation in adult tissues.
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Affiliation(s)
- Elise A Loffet
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - John F Durel
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Jenny Gao
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Richard Kam
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Hyunjee Lim
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Nandan L Nerurkar
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA.
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3
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Loffet EA, Durel JF, Kam R, Lim H, Nerurkar NL. ELASTIC FIBERS DEFINE EMBRYONIC TISSUE STIFFNESS TO ENABLE BUCKLING MORPHOGENESIS OF THE SMALL INTESTINE. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.18.549562. [PMID: 37502968 PMCID: PMC10370103 DOI: 10.1101/2023.07.18.549562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
During embryonic development, tissues must possess precise material properties to ensure that cell-generated forces give rise to the stereotyped morphologies of developing organs. However, the question of how material properties are established and regulated during development remains understudied. Here, we aim to address these broader questions through the study of intestinal looping, a process by which the initially straight intestinal tube buckles into loops, permitting ordered packing within the body cavity. Looping results from elongation of the tube against the constraint of an attached tissue, the dorsal mesentery, which is elastically stretched by the elongating tube to nearly triple its length. This elastic energy storage allows the mesentery to provide stable compressive forces that ultimately buckle the tube into loops. Beginning with a transcriptomic analysis of the mesentery, we identified widespread upregulation of extracellular matrix related genes during looping, including genes related to elastic fiber deposition. Combining molecular and mechanical analyses, we conclude that elastin confers tensile stiffness to the mesentery, enabling its mechanical role in organizing the developing small intestine. These results shed light on the role of elastin as a driver of morphogenesis that extends beyond its more established role in resisting cyclic deformation in adult tissues.
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Affiliation(s)
- Elise A. Loffet
- Department of Biomedical Engineering, Columbia University, New York NY 10027
| | - John F. Durel
- Department of Biomedical Engineering, Columbia University, New York NY 10027
| | - Richard Kam
- Department of Biomedical Engineering, Columbia University, New York NY 10027
| | - Hyunjee Lim
- Department of Biomedical Engineering, Columbia University, New York NY 10027
| | - Nandan L. Nerurkar
- Department of Biomedical Engineering, Columbia University, New York NY 10027
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4
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Xu Q, Streuer A, Jann JC, Altrock E, Schmitt N, Flach J, Sens-Albert C, Rapp F, Wolf J, Nowak V, Weimer N, Obländer J, Palme I, Kuzina M, Jawhar A, Darwich A, Weis CA, Marx A, Wuchter P, Costina V, Jäger E, Sperk E, Neumaier M, Fabarius A, Metzgeroth G, Nolte F, Steiner L, Levkin PA, Jawhar M, Hofmann WK, Riabov V, Nowak D. Inhibition of lysyl oxidases synergizes with 5-azacytidine to restore erythropoiesis in myelodysplastic and myeloid malignancies. Nat Commun 2023; 14:1497. [PMID: 36932114 PMCID: PMC10023686 DOI: 10.1038/s41467-023-37175-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 03/01/2023] [Indexed: 03/19/2023] Open
Abstract
Limited response rates and frequent relapses during standard of care with hypomethylating agents in myelodysplastic neoplasms (MN) require urgent improvement of this treatment indication. Here, by combining 5-azacytidine (5-AZA) with the pan-lysyl oxidase inhibitor PXS-5505, we demonstrate superior restoration of erythroid differentiation in hematopoietic stem and progenitor cells (HSPCs) of MN patients in 20/31 cases (65%) versus 9/31 cases (29%) treated with 5-AZA alone. This effect requires direct contact of HSPCs with bone marrow stroma components and is dependent on integrin signaling. We further confirm these results in vivo using a bone marrow niche-dependent MN xenograft model in female NSG mice, in which we additionally demonstrate an enforced reduction of dominant clones as well as significant attenuation of disease expansion and normalization of spleen sizes. Overall, these results lay out a strong pre-clinical rationale for efficacy of combination treatment of 5-AZA with PXS-5505 especially for anemic MN.
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Affiliation(s)
- Qingyu Xu
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Alexander Streuer
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Johann-Christoph Jann
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Eva Altrock
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Nanni Schmitt
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Johanna Flach
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Carla Sens-Albert
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Felicitas Rapp
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Julia Wolf
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Verena Nowak
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Nadine Weimer
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Julia Obländer
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Iris Palme
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Mariia Kuzina
- Institute of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, 76344, Germany
| | - Ahmed Jawhar
- Department of Orthopedic Surgery, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Ali Darwich
- Department of Orthopedic Surgery, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Cleo-Aron Weis
- Institute of Pathology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Alexander Marx
- Institute of Pathology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Patrick Wuchter
- Institute of Transfusion Medicine and Immunology, German Red Cross Blood Service Baden-Württemberg-Hessen, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Victor Costina
- Institute of Clinical Chemistry, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Evelyn Jäger
- Institute of Clinical Chemistry, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Elena Sperk
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Michael Neumaier
- Institute of Clinical Chemistry, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Alice Fabarius
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Georgia Metzgeroth
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Florian Nolte
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Laurenz Steiner
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Pavel A Levkin
- Institute of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, 76344, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, 76131, Germany
| | - Mohamad Jawhar
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Wolf-Karsten Hofmann
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany
| | - Vladimir Riabov
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany.
| | - Daniel Nowak
- Department of Hematology and Oncology, Medical Faculty Mannheim, Heidelberg University, Mannheim, 68167, Germany.
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Hao B, Beningo KA. Traction Force and Mechanosensing can be Functionally Distinguished Through the Use of Specific Domains of the Calpain Small Subunit. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.07.531592. [PMID: 36945410 PMCID: PMC10028930 DOI: 10.1101/2023.03.07.531592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Cell migration is a fundamental process pertaining to many critical physiological events. The ability to form and release adhesion structures is necessary for cell migration. The Calpain family of cysteine proteases are known to target adhesion proteins as their substrates and modulate adhesion dynamics. The two best studied Calpains, Calpain 1 and Calpain 2 form catalytically active holoenzymes through heterodimerization with a common non-catalytic regulatory small subunit known as Calpain 4. In previous studies, we determined that calpains are important in the production of traction forces and in the sensing of localized mechanical stimulation from the external environment. We found that perturbation of either Calpain 1 or 2 had no effect on the generation of traction forces. However, traction forces were weak when Calpain 4 was silenced. On the other hand, silencing of Calpain 1, 2, or 4 resulted in deficient sensing of external mechanical stimuli. These results together suggest that Calpain 4 functions independent of the catalytic large subunits in the generation of traction forces but functions together with either catalytic subunit in sensing external mechanical stimuli. The small subunit Calpain 4 contains 268 a.a. and is composed of 2 domains, the N-terminal domain V and C-terminal domain VI. Domain VI is a calmodulinlike domain containing five consecutive EF-hand motifs, of which the fifth one heterodimerizes with a large subunit. Moreover, domain V contains the common sequence GTAMRILGGVI that suggests cell membrane interactions. Given these attributes of domain V and VI of Calpain 4, we speculated that an individual domain might provide the functional properties for either traction or sensing. Therefore, each domain was cloned and expressed individually in Capn4-/- cells and assayed for traction and sensing. Results revealed that over-expression of domain V was sufficient to rescue the traction forces defect in Capn4-/- cells while overexpression of domain VI did not rescue the traction force. Consistent with our hypothesis, overexpression of domain VI rescued the sensing defect in Capn4-/- cells while overexpression of domain V had no effect. These results suggest that individual domains of Calpain 4 do indeed function independently to regulate either traction force or the sensing of external stimuli. We speculate that membrane association of Calpain 4 is required for the regulation of traction force and its association with a catalytic subunit is necessary for mechanosensing.
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Zhou P, Ding L, Yan Y, Wang Y, Su B. Recent advances in label-free imaging of cell-matrix adhesions. Chem Commun (Camb) 2023; 59:2341-2351. [PMID: 36744880 DOI: 10.1039/d2cc06499e] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Cell-matrix adhesions play an essential role in mediating and regulating many biological processes. The adhesion receptors, typically transmembrane integrins, provide dynamic correlations between intracellular environments and extracellular matrixes (ECMs) by bi-directional signaling. In-depth investigations of cell-matrix adhesion and integrin-mediated cell adhesive force are of great significance in biology and medicine. The emergence of advanced imaging techniques and principles has facilitated the understanding of the molecular composition and structure dynamics of cell-matrix adhesions, especially the label-free imaging methods that can be used to study living cell dynamics without immunofluorescence staining. This highlight article aims to give an overview of recent developments in imaging cell-matrix adhesions in a label-free manner. Electrochemiluminescence microscopy (ECLM) and surface plasmon resonance microscopy (SPRM) are briefly introduced and their applications in imaging analysis of cell-matrix adhesions are summarized. Then we highlight the advances in mapping cell-matrix adhesion force based on molecular tension probes and fluorescence microscopy (collectively termed as MTFM). The biomaterials including polyethylene glycol (PEG), peptides and DNA for constructing tension probes in MTFM are summarized. Finally, the outlook and perspectives on the further developments of cell-matrix adhesion imaging are presented.
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Affiliation(s)
- Ping Zhou
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Lurong Ding
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Yajuan Yan
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Yafeng Wang
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Bin Su
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
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7
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Wen D, Gao Y, Ho C, Yu L, Zhang Y, Lyu G, Hu D, Li Q, Zhang Y. Focusing on Mechanoregulation Axis in Fibrosis: Sensing, Transduction and Effecting. Front Mol Biosci 2022; 9:804680. [PMID: 35359592 PMCID: PMC8963247 DOI: 10.3389/fmolb.2022.804680] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/09/2022] [Indexed: 11/24/2022] Open
Abstract
Fibrosis, a pathologic process featured by the excessive deposition of connective tissue components, can affect virtually every organ and has no satisfactory therapy yet. Fibrotic diseases are often associated with organ dysfunction which leads to high morbidity and mortality. Biomechanical stmuli and the corresponding cellular response havebeen identified in fibrogenesis, as the fibrotic remodeling could be seen as the incapacity to reestablish mechanical homeostasis: along with extracellular matrix accumulating, the physical property became more “stiff” and could in turn induce fibrosis. In this review, we provide a comprehensive overview of mechanoregulation in fibrosis, from initialing cellular mechanosensing to intracellular mechanotransduction and processing, and ends up in mechanoeffecting. Our contents are not limited to the cellular mechanism, but further expand to the disorders involved and current clinical trials, providing an insight into the disease and hopefully inspiring new approaches for the treatment of tissue fibrosis.
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Affiliation(s)
- Dongsheng Wen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ya Gao
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chiakang Ho
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuguang Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guozhong Lyu
- Department of Burns and Plastic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Dahai Hu
- Burns Centre of PLA, Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Qingfeng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Qingfeng Li, ; Yifan Zhang,
| | - Yifan Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Qingfeng Li, ; Yifan Zhang,
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8
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Boecking CA, Walentek P, Zlock LT, Sun DI, Wolters PJ, Ishikawa H, Jin BJ, Haggie PM, Marshall WF, Verkman AS, Finkbeiner WE. A simple method to generate human airway epithelial organoids with externally orientated apical membranes. Am J Physiol Lung Cell Mol Physiol 2022; 322:L420-L437. [PMID: 35080188 PMCID: PMC8917940 DOI: 10.1152/ajplung.00536.2020] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Organoids, which are self-organizing three-dimensional cultures, provide models that replicate specific cellular components of native tissues or facets of organ complexity. We describe a simple method to generate organoid cultures using isolated human tracheobronchial epithelial cells grown in mixed matrix components and supplemented at day 14 with the Wnt pathway agonist R-spondin 2 (RSPO2) and the bone morphogenic protein antagonist Noggin. In contrast to previous reports, our method produces differentiated tracheobronchospheres with externally orientated apical membranes without pretreatments, providing an epithelial model to study cilia formation and function, disease pathogenesis, and interaction of pathogens with the respiratory mucosa. Starting from 3 × 105 cells, organoid yield at day 28 was 1,720 ± 302. Immunocytochemistry confirmed the cellular localization of airway epithelial markers, including CFTR, Na+/K+ ATPase, acetylated-α-tubulin, E-cadherin, and ZO-1. Compared to native tissues, expression of genes related to bronchial differentiation and ion transport were similar in organoid and air-liquid interface (ALI) cultures. In matched primary cultures, mean organoid cilia length was 6.1 ± 0.2 µm, similar to that of 5.7 ± 0.1 µm in ALI cultures, and ciliary beating was vigorous and coordinated with frequencies of 7.7 ± 0.3 Hz in organoid cultures and 5.3 ± 0.8 Hz in ALI cultures. Functional measurement of osmotically induced volume changes in organoids showed low water permeability. The generation of numerous single testable units from minimal starting material complements prior techniques. This culture system may be useful for studying airway biology and pathophysiology, aiding diagnosis of ciliopathies, and potentially for high-throughput drug screening.
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Affiliation(s)
- Carolin A. Boecking
- 1Department of Pathology, University of California, San Francisco, California
| | - Peter Walentek
- 2Genomics and Development Division, Molecular and Cell Biology Department, University of California, Berkeley, California,3Renal Division, Department of Medicine, University Hospital Freiburg, Freiburg University Faculty of Medicine, Freiburg, Germany,4CIBSS – Centre for Integrative Biological Signalling Studies, Albert Ludwigs University Freiburg, Freiburg, Germany
| | - Lorna T. Zlock
- 1Department of Pathology, University of California, San Francisco, California
| | - Dingyuan I. Sun
- 1Department of Pathology, University of California, San Francisco, California
| | - Paul J. Wolters
- 5Department of Medicine, University of California, San Francisco, California
| | - Hiroaki Ishikawa
- 6Department of Biochemistry and Biophysics, University of California, San Francisco, California
| | - Byung-Ju Jin
- 5Department of Medicine, University of California, San Francisco, California
| | - Peter M. Haggie
- 5Department of Medicine, University of California, San Francisco, California
| | - Wallace F. Marshall
- 6Department of Biochemistry and Biophysics, University of California, San Francisco, California
| | - Alan S. Verkman
- 5Department of Medicine, University of California, San Francisco, California,7Department of Physiology, University of California, San Francisco, California
| | - Walter E. Finkbeiner
- 1Department of Pathology, University of California, San Francisco, California,8Innovative Genomics Institute, University of California, Berkeley, California
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9
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Balcioglu HE, Harkes R, Danen EHJ, Schmidt T. Substrate rigidity modulates traction forces and stoichiometry of cell–matrix adhesions. J Chem Phys 2022; 156:085101. [DOI: 10.1063/5.0077004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In cell–matrix adhesions, integrin receptors and associated proteins provide a dynamic coupling of the extracellular matrix (ECM) to the cytoskeleton. This allows bidirectional transmission of forces between the ECM and the cytoskeleton, which tunes intracellular signaling cascades that control survival, proliferation, differentiation, and motility. The quantitative relationships between recruitment of distinct cell–matrix adhesion proteins and local cellular traction forces are not known. Here, we applied quantitative super-resolution microscopy to cell–matrix adhesions formed on fibronectin-stamped elastomeric pillars and developed an approach to relate the number of talin, vinculin, paxillin, and focal adhesion kinase (FAK) molecules to the local cellular traction force. We find that FAK recruitment does not show an association with traction-force application, whereas a ∼60 pN force increase is associated with the recruitment of one talin, two vinculin, and two paxillin molecules on a substrate with an effective stiffness of 47 kPa. On a substrate with a fourfold lower effective stiffness, the stoichiometry of talin:vinculin:paxillin changes to 2:12:6 for the same ∼60 pN traction force. The relative change in force-related vinculin recruitment indicates a stiffness-dependent switch in vinculin function in cell–matrix adhesions. Our results reveal a substrate-stiffness-dependent modulation of the relationship between cellular traction-force and the molecular stoichiometry of cell–matrix adhesions.
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Affiliation(s)
- Hayri E. Balcioglu
- Leiden Academic Center for Drug Research, Leiden University, Leiden, The Netherlands
| | - Rolf Harkes
- Physics of Life Processes, Kamerlingh Onnes-Huygens Laboratory, Leiden University, Leiden, The Netherlands
| | - Erik H. J. Danen
- Leiden Academic Center for Drug Research, Leiden University, Leiden, The Netherlands
| | - Thomas Schmidt
- Physics of Life Processes, Kamerlingh Onnes-Huygens Laboratory, Leiden University, Leiden, The Netherlands
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10
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Zhou J, Shen JY, Man XY, Li W, Chen JQ, Cai SQ, Zheng M. Differential Regulation of Integrin α5 and β4 in Normal and Psoriatic Epidermal Keratinocytes. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Jiong Zhou
- Zhejiang University School of Medicine, China
| | | | | | - Wei Li
- Zhejiang University School of Medicine, China
| | - Jia-Qi Chen
- Zhejiang University School of Medicine, China
| | | | - Min Zheng
- Zhejiang University School of Medicine, China
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11
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Hu X, Zhang Y. Developing biomaterials to mediate the spatial distribution of integrins. BIOPHYSICS REVIEWS 2021; 2:041302. [PMID: 38504718 PMCID: PMC10903404 DOI: 10.1063/5.0055746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 10/21/2021] [Indexed: 03/21/2024]
Abstract
Innovation in material design to regulate cell behavior and function is one of the primary tasks in materials science. Integrins, a family of cell surface-adhesion receptors that mechanically connect the extracellular matrix (ECM) to the intracellular cytoskeleton, have long served as primary targets for the design of biomaterials because their activity is not only critical to a wide range of cell and tissue functions but also subject to very tight and complex regulations from the outside environment. To review the recent progress of material innovations targeting the spatial distribution of integrins, we first introduce the interaction mechanisms between cells and the ECM by highlighting integrin-based cell adhesions, describing how integrins respond to environmental stimuli, including variations in ligand presentation, mechanical cues, and topographical variations. Then, we overview the current development of soft materials in guiding cell behaviors and functions via spatial regulation of integrins. Finally, we discuss the current limitations of these technologies and the advances that may be achieved in the future. Undoubtedly, synthetic soft materials that mediate the spatial distribution of integrins play an important role in biomaterial innovations for advancing biomedical applications and addressing fundamental biological questions.
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Affiliation(s)
- Xunwu Hu
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Ye Zhang
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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12
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Brain and Breast Cancer Cells with PTEN Loss of Function Reveal Enhanced Durotaxis and RHOB Dependent Amoeboid Migration Utilizing 3D Scaffolds and Aligned Microfiber Tracts. Cancers (Basel) 2021; 13:cancers13205144. [PMID: 34680293 PMCID: PMC8533830 DOI: 10.3390/cancers13205144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/04/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Glioblastoma multiforme (GBM) and metastatic triple-negative breast cancer (TNBC) with PTEN mutations often lead to brain dissemination with poor patient outcome, thus new therapeutic targets are needed. To understand signaling, controlling the dynamics and mechanics of brain tumor cell migration, we implemented GBM and TNBC cell lines and designed 3D aligned microfibers and scaffolds mimicking brain structures. METHODS 3D microfibers and scaffolds were printed using melt electrowriting. GBM and TNBC cell lines with opposing PTEN genotypes were analyzed with RHO-ROCK-PTEN inhibitors and PTEN rescue using live-cell imaging. RNA-sequencing and qPCR of tumor cells in 3D with microfibers were performed, while scanning electron microscopy and confocal microscopy addressed cell morphology. RESULTS In contrast to the PTEN wildtype, GBM and TNBC cells with PTEN loss of function yielded enhanced durotaxis, topotaxis, adhesion, amoeboid migration on 3D microfibers and significant high RHOB expression. Functional studies concerning RHOB-ROCK-PTEN signaling confirmed the essential role for the above cellular processes. CONCLUSIONS This study demonstrates a significant role of the PTEN genotype and RHOB expression for durotaxis, adhesion and migration dependent on 3D. GBM and TNBC cells with PTEN loss of function have an affinity for stiff brain structures promoting metastasis. 3D microfibers represent an important tool to model brain metastasizing tumor cells, where RHO-inhibitors could play an essential role for improved therapy.
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13
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Rizwan M, Baker AEG, Shoichet MS. Designing Hydrogels for 3D Cell Culture Using Dynamic Covalent Crosslinking. Adv Healthc Mater 2021; 10:e2100234. [PMID: 33987970 DOI: 10.1002/adhm.202100234] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/22/2021] [Indexed: 12/17/2022]
Abstract
Designing simple biomaterials to replicate the biochemical and mechanical properties of tissues is an ongoing challenge in tissue engineering. For several decades, new biomaterials have been engineered using cytocompatible chemical reactions and spontaneous ligations via click chemistries to generate scaffolds and water swollen polymer networks, known as hydrogels, with tunable properties. However, most of these materials are static in nature, providing only macroscopic tunability of the scaffold mechanics, and do not reflect the dynamic environment of natural extracellular microenvironment. For more complex applications such as organoids or co-culture systems, there remain opportunities to investigate cells that locally remodel and change the physicochemical properties within the matrices. In this review, advanced biomaterials where dynamic covalent chemistry is used to produce stable 3D cell culture models and high-resolution constructs for both in vitro and in vivo applications, are discussed. The implications of dynamic covalent chemistry on viscoelastic properties of in vitro models are summarized, case studies in 3D cell culture are critically analyzed, and opportunities to further improve the performance of biomaterials for 3D tissue engineering are discussed.
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Affiliation(s)
- Muhammad Rizwan
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
| | - Alexander E. G. Baker
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
| | - Molly S. Shoichet
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
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14
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Gaston C, De Beco S, Doss B, Pan M, Gauquelin E, D'Alessandro J, Lim CT, Ladoux B, Delacour D. EpCAM promotes endosomal modulation of the cortical RhoA zone for epithelial organization. Nat Commun 2021; 12:2226. [PMID: 33850145 PMCID: PMC8044225 DOI: 10.1038/s41467-021-22482-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 03/11/2021] [Indexed: 01/13/2023] Open
Abstract
At the basis of cell shape and behavior, the organization of actomyosin and its ability to generate forces are widely studied. However, the precise regulation of this contractile network in space and time is unclear. Here, we study the role of the epithelial-specific protein EpCAM, a contractility modulator, in cell shape and motility. We show that EpCAM is required for stress fiber generation and front-rear polarity acquisition at the single cell level. In fact, EpCAM participates in the remodeling of a transient zone of active RhoA at the cortex of spreading epithelial cells. EpCAM and RhoA route together through the Rab35/EHD1 fast recycling pathway. This endosomal pathway spatially organizes GTP-RhoA to fine tune the activity of actomyosin resulting in polarized cell shape and development of intracellular stiffness and traction forces. Impairment of GTP-RhoA endosomal trafficking either by silencing EpCAM or by expressing Rab35/EHD1 mutants prevents proper myosin-II activity, stress fiber formation and ultimately cell polarization. Collectively, this work shows that the coupling between co-trafficking of EpCAM and RhoA, and actomyosin rearrangement is pivotal for cell spreading, and advances our understanding of how biochemical and mechanical properties promote cell plasticity.
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Affiliation(s)
- Cécile Gaston
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France
| | - Simon De Beco
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France
| | - Bryant Doss
- Mechanobiology Institute, T-lab, Singapore, Singapore
| | - Meng Pan
- Mechanobiology Institute, T-lab, Singapore, Singapore
| | - Estelle Gauquelin
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France
| | - Joseph D'Alessandro
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France
| | | | - Benoit Ladoux
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France
| | - Delphine Delacour
- Cell Adhesion and Mechanics, Institut Jacques Monod, CNRS UMR7592, Paris Diderot University, Paris, France.
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15
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Barcelona‐Estaje E, Dalby MJ, Cantini M, Salmeron‐Sanchez M. You Talking to Me? Cadherin and Integrin Crosstalk in Biomaterial Design. Adv Healthc Mater 2021; 10:e2002048. [PMID: 33586353 DOI: 10.1002/adhm.202002048] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/20/2021] [Indexed: 12/21/2022]
Abstract
While much work has been done in the design of biomaterials to control integrin-mediated adhesion, less emphasis has been put on functionalization of materials with cadherin ligands. Yet, cell-cell contacts in combination with cell-matrix interactions are key in driving embryonic development, collective cell migration, epithelial to mesenchymal transition, and cancer metastatic processes, among others. This review focuses on the incorporation of both cadherin and integrin ligands in biomaterial design, to promote what is called the "adhesive crosstalk." First, the structure and function of cadherins and their role in eliciting mechanotransductive processes, by themselves or in combination with integrin mechanosensing, are introduced. Then, biomaterials that mimic cell-cell interactions, and recent applications to get insights in fundamental biology and tissue engineering, are critically discussed.
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Affiliation(s)
- Eva Barcelona‐Estaje
- Centre for the Cellular Microenvironment University of Glasgow Glasgow G12 8QQ UK
| | - Matthew J. Dalby
- Centre for the Cellular Microenvironment University of Glasgow Glasgow G12 8QQ UK
| | - Marco Cantini
- Centre for the Cellular Microenvironment University of Glasgow Glasgow G12 8QQ UK
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16
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Hierarchical modeling of mechano-chemical dynamics of epithelial sheets across cells and tissue. Sci Rep 2021; 11:4069. [PMID: 33603023 PMCID: PMC7892579 DOI: 10.1038/s41598-021-83396-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/27/2021] [Indexed: 12/04/2022] Open
Abstract
Collective cell migration is a fundamental process in embryonic development and tissue homeostasis. This is a macroscopic population-level phenomenon that emerges across hierarchy from microscopic cell-cell interactions; however, the underlying mechanism remains unclear. Here, we addressed this issue by focusing on epithelial collective cell migration, driven by the mechanical force regulated by chemical signals of traveling ERK activation waves, observed in wound healing. We propose a hierarchical mathematical framework for understanding how cells are orchestrated through mechanochemical cell-cell interaction. In this framework, we mathematically transformed a particle-based model at the cellular level into a continuum model at the tissue level. The continuum model described relationships between cell migration and mechanochemical variables, namely, ERK activity gradients, cell density, and velocity field, which could be compared with live-cell imaging data. Through numerical simulations, the continuum model recapitulated the ERK wave-induced collective cell migration in wound healing. We also numerically confirmed a consistency between these two models. Thus, our hierarchical approach offers a new theoretical platform to reveal a causality between macroscopic tissue-level and microscopic cellular-level phenomena. Furthermore, our model is also capable of deriving a theoretical insight on both of mechanical and chemical signals, in the causality of tissue and cellular dynamics.
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17
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Collinet C, Lecuit T. Programmed and self-organized flow of information during morphogenesis. Nat Rev Mol Cell Biol 2021; 22:245-265. [PMID: 33483696 DOI: 10.1038/s41580-020-00318-6] [Citation(s) in RCA: 107] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2020] [Indexed: 11/09/2022]
Abstract
How the shape of embryos and organs emerges during development is a fundamental question that has fascinated scientists for centuries. Tissue dynamics arise from a small set of cell behaviours, including shape changes, cell contact remodelling, cell migration, cell division and cell extrusion. These behaviours require control over cell mechanics, namely active stresses associated with protrusive, contractile and adhesive forces, and hydrostatic pressure, as well as material properties of cells that dictate how cells respond to active stresses. In this Review, we address how cell mechanics and the associated cell behaviours are robustly organized in space and time during tissue morphogenesis. We first outline how not only gene expression and the resulting biochemical cues, but also mechanics and geometry act as sources of morphogenetic information to ultimately define the time and length scales of the cell behaviours driving morphogenesis. Next, we present two idealized modes of how this information flows - how it is read out and translated into a biological effect - during morphogenesis. The first, akin to a programme, follows deterministic rules and is hierarchical. The second follows the principles of self-organization, which rests on statistical rules characterizing the system's composition and configuration, local interactions and feedback. We discuss the contribution of these two modes to the mechanisms of four very general classes of tissue deformation, namely tissue folding and invagination, tissue flow and extension, tissue hollowing and, finally, tissue branching. Overall, we suggest a conceptual framework for understanding morphogenetic information that encapsulates genetics and biochemistry as well as mechanics and geometry as information modules, and the interplay of deterministic and self-organized mechanisms of their deployment, thereby diverging considerably from the traditional notion that shape is fully encoded and determined by genes.
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Affiliation(s)
- Claudio Collinet
- Aix-Marseille Université & CNRS, IBDM - UMR7288 & Turing Centre for Living Systems, Campus de Luminy Case 907, Marseille, France
| | - Thomas Lecuit
- Aix-Marseille Université & CNRS, IBDM - UMR7288 & Turing Centre for Living Systems, Campus de Luminy Case 907, Marseille, France. .,Collège de France, Paris, France.
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18
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Abstract
Many biomolecular condensates appear to form via spontaneous or driven processes that have the hallmarks of intracellular phase transitions. This suggests that a common underlying physical framework might govern the formation of functionally and compositionally unrelated biomolecular condensates. In this review, we summarize recent work that leverages a stickers-and-spacers framework adapted from the field of associative polymers for understanding how multivalent protein and RNA molecules drive phase transitions that give rise to biomolecular condensates. We discuss how the valence of stickers impacts the driving forces for condensate formation and elaborate on how stickers can be distinguished from spacers in different contexts. We touch on the impact of sticker- and spacer-mediated interactions on the rheological properties of condensates and show how the model can be mapped to known drivers of different types of biomolecular condensates.
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Affiliation(s)
- Jeong-Mo Choi
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, 63130, USA; , ,
- Center for Science & Engineering of Living Systems (CSELS), Washington University in St. Louis, St. Louis, Missouri, 63130, USA
- Natural Science Research Institute, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Alex S Holehouse
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, 63130, USA; , ,
- Center for Science & Engineering of Living Systems (CSELS), Washington University in St. Louis, St. Louis, Missouri, 63130, USA
| | - Rohit V Pappu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, 63130, USA; , ,
- Center for Science & Engineering of Living Systems (CSELS), Washington University in St. Louis, St. Louis, Missouri, 63130, USA
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19
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Ding H, Guo W, Su B. Imaging Cell‐Matrix Adhesions and Collective Migration of Living Cells by Electrochemiluminescence Microscopy. Angew Chem Int Ed Engl 2019; 59:449-456. [DOI: 10.1002/anie.201911190] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 10/03/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Hao Ding
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Weiliang Guo
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Bin Su
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
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20
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Ding H, Guo W, Su B. Imaging Cell‐Matrix Adhesions and Collective Migration of Living Cells by Electrochemiluminescence Microscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911190] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hao Ding
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Weiliang Guo
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Bin Su
- Institute of Analytical Chemistry Department of Chemistry Zhejiang University Hangzhou 310058 China
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21
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Microwave-mediated synthesis of iron-oxide nanoparticles for use in magnetic levitation cell cultures. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-00962-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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22
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Terekhova K, Pokutta S, Kee YS, Li J, Tajkhorshid E, Fuller G, Dunn AR, Weis WI. Binding partner- and force-promoted changes in αE-catenin conformation probed by native cysteine labeling. Sci Rep 2019; 9:15375. [PMID: 31653927 PMCID: PMC6814714 DOI: 10.1038/s41598-019-51816-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/04/2019] [Indexed: 12/12/2022] Open
Abstract
Adherens Junctions (AJs) are cell-cell adhesion complexes that sense and propagate mechanical forces by coupling cadherins to the actin cytoskeleton via β-catenin and the F-actin binding protein αE-catenin. When subjected to mechanical force, the cadherin•catenin complex can tightly link to F-actin through αE-catenin, and also recruits the F-actin-binding protein vinculin. In this study, labeling of native cysteines combined with mass spectrometry revealed conformational changes in αE-catenin upon binding to the E-cadherin•β-catenin complex, vinculin and F-actin. A method to apply physiologically meaningful forces in solution revealed force-induced conformational changes in αE-catenin when bound to F-actin. Comparisons of wild-type αE-catenin and a mutant with enhanced vinculin affinity using cysteine labeling and isothermal titration calorimetry provide evidence for allosteric coupling of the N-terminal β-catenin-binding and the middle (M) vinculin-binding domain of αE-catenin. Cysteine labeling also revealed possible crosstalk between the actin-binding domain and the rest of the protein. The data provide insight into how binding partners and mechanical stress can regulate the conformation of full-length αE-catenin, and identify the M domain as a key transmitter of conformational changes.
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Affiliation(s)
- Ksenia Terekhova
- Departments of Structural Biology and Molecular & Cellular Physiology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Sabine Pokutta
- Departments of Structural Biology and Molecular & Cellular Physiology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Yee S Kee
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.,Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080 (Y.S.K.); Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, 60637 (J.L.), USA
| | - Jing Li
- Departments of Chemistry, Chemical and Biomolecular Engineering, and Center for Biophysics and Quantitative Biology, University of Illinois, Urbana, IL, USA.,Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080 (Y.S.K.); Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, 60637 (J.L.), USA
| | - Emad Tajkhorshid
- Departments of Chemistry, Chemical and Biomolecular Engineering, and Center for Biophysics and Quantitative Biology, University of Illinois, Urbana, IL, USA
| | - Gerald Fuller
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Alexander R Dunn
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.,Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - William I Weis
- Departments of Structural Biology and Molecular & Cellular Physiology, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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23
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Kiyoshima D, Tatsumi H, Hirata H, Sokabe M. Tensile Loads on Tethered Actin Filaments Induce Accumulation of Cell Adhesion-Associated Proteins in Vitro. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7443-7451. [PMID: 30204447 DOI: 10.1021/acs.langmuir.8b02076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Focal adhesions (FAs) and adherens junctions (AJs), which serve as a mechanical interface of cell-matrix and cell-cell interactions, respectively, experience tensile force either originating from the deformation of the surrounding tissues or generated by the actomyosin machinery in the cell. These mechanical inputs cause enlargement of FAs and AJs, while the detailed mechanism for the force-dependent development of FAs and AJs remain unclear. Both FAs and AJs provide sites for tethering of actin filaments and actin polymerization. Here, we develop a cell-free system, in which actin filaments are tethered to glass surfaces, and show that application of tensile force to the tethered filaments in the cell extract induces accumulation of several FA and AJ proteins, associated with further accumulation of actin filaments via de novo actin polymerization. Decline in the tensile force results in a decrease in the amount of the accumulated proteins. These results suggest that the tensile force acting on the tethered actin filaments plays a crucial role in the accumulation of FA and AJ proteins.
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Affiliation(s)
- Daisuke Kiyoshima
- Department of Physiology , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
- Department of Rehabilitation , Aichi Medical College , Kiyosu , Aichi 452-0931 , Japan
| | - Hitoshi Tatsumi
- Department of Physiology , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
- Department of Applied Bioscience, College of Bioscience and Chemistry , Kanazawa Institute of Technology , Hakusan , Ishikawa 924-0838 , Japan
| | - Hiroaki Hirata
- Department of Physiology , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
- Mechanobiology Laboratory , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
| | - Masahiro Sokabe
- Department of Physiology , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
- Mechanobiology Laboratory , Nagoya University Graduate School of Medicine , Nagoya , Aichi 466-8550 , Japan
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24
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Chang B, Svoboda KKH, Liu X. Cell polarization: From epithelial cells to odontoblasts. Eur J Cell Biol 2018; 98:1-11. [PMID: 30473389 DOI: 10.1016/j.ejcb.2018.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/04/2018] [Accepted: 11/16/2018] [Indexed: 12/29/2022] Open
Abstract
Cell polarity identifies the asymmetry of a cell. Various types of cells, including odontoblasts and epithelial cells, polarize to fulfil their destined functions. Odontoblast polarization is a prerequisite and fundamental step for tooth development and tubular dentin formation. Current knowledge of odontoblast polarization, however, is very limited, which greatly impedes the development of novel approaches for regenerative endodontics. Compared to odontoblasts, epithelial cell polarization has been extensively studied over the last several decades. The knowledge obtained from epithelia polarization has been found applicable to other cell types, which is particularly useful considering the remarkable similarities of the morphological and compositional features between polarized odontoblasts and epithelia. In this review, we first discuss the characteristics, the key regulatory factors, and the process of epithelial polarity. Next, we compare the known facts of odontoblast polarization with epithelial cells. Lastly, we clarify knowledge gaps in odontoblast polarization and propose the directions for future research to fill the gaps, leading to the advancement of regenerative endodontics.
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Affiliation(s)
- Bei Chang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, 75246, USA
| | - Kathy K H Svoboda
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, 75246, USA
| | - Xiaohua Liu
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, TX, 75246, USA.
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25
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Importance of integrity of cell-cell junctions for the mechanics of confluent MDCK II cells. Sci Rep 2018; 8:14117. [PMID: 30237412 PMCID: PMC6148251 DOI: 10.1038/s41598-018-32421-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 08/29/2018] [Indexed: 12/14/2022] Open
Abstract
Intercellular junctions are important mechanical couplers between cells in epithelial layers providing adhesion and intercellular communication. Regulation of the junctions occurs in cellular processes such as layer formation, epithelial-to-mesenchymal transition, embryogenesis, and cancer progression. Many studies addressed the role of force generation in cells for establishing lateral cell-cell junctions and the role of cellular force transmission in tissue formation and maintenance. Our atomic force microscopy- (AFM) based study shed light on the role of both, tight junctions and adherens junctions for the mechanical properties of individual epithelial cells that are part of a confluent monolayer. We found that tight junctions are important for the establishment of a functional barrier-forming layer but impairing them does not reduce the mechanical integrity of cells. Depletion of ZO-1 results in a weak increase in cortical tension. An opposite effect was observed for disruption of E-cadherin-mediated adherens junctions using DTT. Opening of adherens junctions leads to substantial alterations of cellular mechanics such as reduced overall stiffness, but these changes turned out to be reversible after re-establishing disulfide bridges in E-cadherin by removal of DTT. We found that regulatory mechanisms exist that preserve mechanical integrity during recovery of disrupted adherens junctions.
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26
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Sun Z, Toyama Y. Three-dimensional forces beyond actomyosin contraction: lessons from fly epithelial deformation. Curr Opin Genet Dev 2018; 51:96-102. [PMID: 30216753 DOI: 10.1016/j.gde.2018.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 08/21/2018] [Accepted: 08/24/2018] [Indexed: 10/28/2022]
Abstract
Epithelium undergoes complex deformations during morphogenesis. Many of these deformations rely on the remodelling of apical cell junctions by actomyosin-based contractile force and this has been a major research interest for many years. Recent studies have shown that cells can use additional mechanisms that are not directly driven by actomyosin contractility to alter cell shape and movement, in three-dimensional (3D) space and time. In this review, we focus on a number of these mechanisms, including basolateral cellular protrusion, lateral shift of cell polarity, cytoplasmic flow, regulation of cell volume, and force transmission between cell-cell adhesion and cell-extracellular matrix adhesion, and describe how they underlie Drosophila epithelia deformations.
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Affiliation(s)
- Zijun Sun
- Mechanobiology Institute, National University of Singapore, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Yusuke Toyama
- Mechanobiology Institute, National University of Singapore, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore; Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore.
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Tunable cell-surface mimetics as engineered cell substrates. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:2076-2093. [PMID: 29935145 DOI: 10.1016/j.bbamem.2018.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 05/18/2018] [Accepted: 06/08/2018] [Indexed: 12/21/2022]
Abstract
Most recent breakthroughs in understanding cell adhesion, cell migration, and cellular mechanosensitivity have been made possible by the development of engineered cell substrates of well-defined surface properties. Traditionally, these substrates mimic the extracellular matrix (ECM) environment by the use of ligand-functionalized polymeric gels of adjustable stiffness. However, such ECM mimetics are limited in their ability to replicate the rich dynamics found at cell-cell contacts. This review focuses on the application of cell surface mimetics, which are better suited for the analysis of cell adhesion, cell migration, and cellular mechanosensitivity across cell-cell interfaces. Functionalized supported lipid bilayer systems were first introduced as biomembrane-mimicking substrates to study processes of adhesion maturation during adhesion of functionalized vesicles (cell-free assay) and plated cells. However, while able to capture adhesion processes, the fluid lipid bilayer of such a relatively simple planar model membrane prevents adhering cells from transducing contractile forces to the underlying solid, making studies of cell migration and cellular mechanosensitivity largely impractical. Therefore, the main focus of this review is on polymer-tethered lipid bilayer architectures as biomembrane-mimicking cell substrate. Unlike supported lipid bilayers, these polymer-lipid composite materials enable the free assembly of linkers into linker clusters at cellular contacts without hindering cell spreading and migration and allow the controlled regulation of mechanical properties, enabling studies of cellular mechanosensitivity. The various polymer-tethered lipid bilayer architectures and their complementary properties as cell substrates are discussed.
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28
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Mechanosensitive adhesion complexes in epithelial architecture and cancer onset. Curr Opin Cell Biol 2018; 50:42-49. [PMID: 29454273 DOI: 10.1016/j.ceb.2018.01.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/10/2018] [Accepted: 01/30/2018] [Indexed: 01/09/2023]
Abstract
Mechanical signals from the extracellular space are paramount to coordinate tissue morphogenesis and homeostasis. Although there is a wide variety of cellular mechanisms involved in transducing extracellular forces, recent literature emphasizes the central role of two main adhesion complexes in epithelial mechanosensitive processes: focal adhesions and adherens junctions. These biomechanical sensors can decode physical signals such as matrix stiffness or intercellular tension into a wide range of coordinated cellular responses, which can impact cell differentiation, migration, and proliferation. Communication between cells and their microenvironment plays a pivotal role both in physiological and pathological conditions. Here we summarize the most recent findings on the biology of these mechanotransduction pathways in epithelial cells, highlighting the extensive amount of biological processes coordinated by cell-matrix and cell-cell adhesion complexes.
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Lee FY, Zhen YY, Yuen CM, Fan R, Chen YT, Sheu JJ, Chen YL, Wang CJ, Sun CK, Yip HK. The mTOR-FAK mechanotransduction signaling axis for focal adhesion maturation and cell proliferation. Am J Transl Res 2017; 9:1603-1617. [PMID: 28469768 PMCID: PMC5411911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/26/2016] [Indexed: 06/07/2023]
Abstract
BACKGROUND Mechanotransduction (MTD) is an important physiopathological signalling pathway associated with cardiovascular disease such as hypertension. Phosphorylation of focal adhesion kinase (FAK) is a MTD-sensing protein. This study tested the hypothesis that mTOR-FAK MTD signaling axis was crucial for focal adhesion (FA) maturation and cell proliferation. METHODS Shock-wave was adopted as a tool for MTD and mTOR-FAK signaling. RESULTS After demonstrating a failure in FAK phosphorylation after microfilament depolymerization, we attempted to identify the upstream regulator out of three kinases known to be activated in pressure-stimulated MTD [i.e., GSK-3β, Akt, and mTORC1 (mammalian target of rapamycin complex 1)]. Of the three specific inhibitors, only rapamycin, an inhibitor of mTORC1, was found to inhibit FAK phosphorylation, suggesting that mTORC1 is the upstream regulator in shock-wave-elicited FAK phosphorylation. Moreover, mTOR and its readout protein S6K were found to be activated by shock-wave stimulation. On the other hand, microscopic examination revealed not only MTD-induced increase in the number of actin stress fibers, but also alternative subcellular localization of mTORC1 as vesicle-like inclusions on microfilaments. Besides, rapamycin was found to destruct the granular pattern of mTORC1, while dissociation between F-actin and mTORC1 was noted after cytochalasin D administration. Since mTORC1 and FAK are essential for cell proliferation, we performed proliferation assay for mesenchymal stem cell (MSC) with and without shock-wave administration/rapamycin treatment/FAK depletion. The results demonstrated significant enhancement of cell proliferation after shock-wave stimulation but remarkable suppression after rapamycin and siFAK treatment. CONCLUSION Our findings suggest not only a co-ordinated regulation of FAK phosphorylation by mTORC1 and microfilaments, but also the participation of mTORC1-FAK signalling in MSC proliferation.
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Affiliation(s)
- Fan-Yen Lee
- Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
| | - Yen-Yi Zhen
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
| | - Chun-Man Yuen
- Division of Neurosurgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
| | - Raymond Fan
- Department of Biochemistry, Hunter College, City University of New YorkNY 10065, U.S.A.
| | - Yen-Ta Chen
- Divisions of Urology, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
| | - Jiunn-Jye Sheu
- Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
| | - Yi-Ling Chen
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
| | - Ching-Jen Wang
- Department of Orthopedic Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
| | - Cheuk-Kwan Sun
- Department of Emergency Medicine, E-Da Hospital, I-Shou University School of Medicine for International StudentsKaohsiung 82445, Taiwan
| | - Hon-Kan Yip
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung 88301, Taiwan
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalKaohsiung 83301, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical UniversityTaichung 40402, Taiwan
- Department of Nursing, Asia UniversityTaichung 41354, Taiwan, China
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30
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Morinaga T, Yanase S, Okamoto A, Yamaguchi N, Yamaguchi N. Recruitment of Lyn from endomembranes to the plasma membrane through calcium-dependent cell-cell interactions upon polarization of inducible Lyn-expressing MDCK cells. Sci Rep 2017; 7:493. [PMID: 28352128 PMCID: PMC5428707 DOI: 10.1038/s41598-017-00538-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/28/2017] [Indexed: 01/04/2023] Open
Abstract
Src-family kinases, expressed in a wide variety of cell types, are anchored to cellular membranes through posttranslational lipid modifications and involved in diverse cellular signalling. In epithelial cells, Src-family kinases are localized at the plasma membrane and participate in epithelial functions. Epithelial cell polarity is achieved through dynamic reorganization of protein trafficking. To examine the trafficking of Src-family kinases between polarized and non-polarized epithelial cells, we generated an MDCK cell line that can inducibly express a protein of interest in a polarized state at any time. We show here that Lyn, a member of Src-family kinases, mainly localizes to the plasma membrane in polarized MDCK cells and to endomembranes in non-polarized MDCK cells. Cell-cell interactions between adjacent MDCK cells recruit Lyn from endomembranes to the plasma membrane even without cell attachment to extracellular matrix scaffolds, and loss of cell-cell interactions by calcium deprivation relocates Lyn from the plasma membrane to endomembranes through Rab11-mediated recycling. Therefore, using our MDCK cells expressing inducible Lyn, we reveal that calcium-dependent cell-cell interactions play a critical role in plasma membrane localization of Lyn in polarized MDCK cells.
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Affiliation(s)
- Takao Morinaga
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan.,Division of Pathology and Cell Therapy, Chiba Cancer Center Research Institute, Chiba, 260-8717, Japan
| | - Sayuri Yanase
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Aya Okamoto
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan.
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31
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Erasmus JC, Bruche S, Pizarro L, Maimari N, Pogglioli T, Tomlinson C, Lees J, Zalivina I, Wheeler A, Alberts A, Russo A, Braga VMM. Defining functional interactions during biogenesis of epithelial junctions. Nat Commun 2016; 7:13542. [PMID: 27922008 PMCID: PMC5150262 DOI: 10.1038/ncomms13542] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 10/13/2016] [Indexed: 12/26/2022] Open
Abstract
In spite of extensive recent progress, a comprehensive understanding of how actin cytoskeleton remodelling supports stable junctions remains to be established. Here we design a platform that integrates actin functions with optimized phenotypic clustering and identify new cytoskeletal proteins, their functional hierarchy and pathways that modulate E-cadherin adhesion. Depletion of EEF1A, an actin bundling protein, increases E-cadherin levels at junctions without a corresponding reinforcement of cell–cell contacts. This unexpected result reflects a more dynamic and mobile junctional actin in EEF1A-depleted cells. A partner for EEF1A in cadherin contact maintenance is the formin DIAPH2, which interacts with EEF1A. In contrast, depletion of either the endocytic regulator TRIP10 or the Rho GTPase activator VAV2 reduces E-cadherin levels at junctions. TRIP10 binds to and requires VAV2 function for its junctional localization. Overall, we present new conceptual insights on junction stabilization, which integrate known and novel pathways with impact for epithelial morphogenesis, homeostasis and diseases. Formation and reinforcement of E-cadherin-mediated adhesion depends on intracellular trafficking and interactions with the actin cytoskeleton, but how these are coordinated is not known. Here the authors conduct a focused phenotypic screen to identify new pathways regulating cell–cell junction homeostasis.
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Affiliation(s)
- J C Erasmus
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - S Bruche
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - L Pizarro
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK.,Computing Department, Imperial College London, London SW7 2AZ, UK
| | - N Maimari
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK.,Bioengineering Department, Faculty of Engineering, Imperial College London, London SW7 2AZ, UK
| | - T Pogglioli
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - C Tomlinson
- Department of Surgery &Cancer, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - J Lees
- Department Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - I Zalivina
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - A Wheeler
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
| | - A Alberts
- Van Andel Institute, Grand Rapids, Michigan 49503, USA
| | - A Russo
- Computing Department, Imperial College London, London SW7 2AZ, UK
| | - V M M Braga
- National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK
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32
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Lineage mapper: A versatile cell and particle tracker. Sci Rep 2016; 6:36984. [PMID: 27853188 PMCID: PMC5113068 DOI: 10.1038/srep36984] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 10/19/2016] [Indexed: 12/23/2022] Open
Abstract
The ability to accurately track cells and particles from images is critical to many biomedical problems. To address this, we developed Lineage Mapper, an open-source tracker for time-lapse images of biological cells, colonies, and particles. Lineage Mapper tracks objects independently of the segmentation method, detects mitosis in confluence, separates cell clumps mistakenly segmented as a single cell, provides accuracy and scalability even on terabyte-sized datasets, and creates division and/or fusion lineages. Lineage Mapper has been tested and validated on multiple biological and simulated problems. The software is available in ImageJ and Matlab at isg.nist.gov.
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Nicolás-Pérez M, Kuchling F, Letelier J, Polvillo R, Wittbrodt J, Martínez-Morales JR. Analysis of cellular behavior and cytoskeletal dynamics reveal a constriction mechanism driving optic cup morphogenesis. eLife 2016; 5. [PMID: 27797321 PMCID: PMC5110244 DOI: 10.7554/elife.15797] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 10/27/2016] [Indexed: 12/21/2022] Open
Abstract
Contractile actomyosin networks have been shown to power tissue morphogenesis. Although the basic cellular machinery generating mechanical tension appears largely conserved, tensions propagate in unique ways within each tissue. Here we use the vertebrate eye as a paradigm to investigate how tensions are generated and transmitted during the folding of a neuroepithelial layer. We record membrane pulsatile behavior and actomyosin dynamics during zebrafish optic cup morphogenesis by live imaging. We show that retinal neuroblasts undergo fast oscillations and that myosin condensation correlates with episodic contractions that progressively reduce basal feet area. Interference with lamc1 function impairs basal contractility and optic cup folding. Mapping of tensile forces by laser cutting uncover a developmental window in which local ablations trigger the displacement of the entire tissue. Our work shows that optic cup morphogenesis is driven by a constriction mechanism and indicates that supra-cellular transmission of mechanical tension depends on ECM attachment. DOI:http://dx.doi.org/10.7554/eLife.15797.001 Tissues and organs form into their final shapes because the cells in a developing embryo generate forces that alter their shape and position. Networks of fibres made from actin and myosin proteins generate these forces, and because the fibres can assemble in many different ways inside cells, they allow the cells to move and change shape in many different ways. Forces in some tissues can cause flat sheets of cells to bend. These sheets of cells are attached on one side (their “basal” surface) to a collection of membranes and molecules that are known as the extracellular matrix. When the cells in the sheet progressively shrink at their basal surface, causing the sheet to bend towards the extracellular matrix, this is known as basal constriction. Nicolás-Pérez et al. have used high-resolution imaging to record how basal constriction helps the optic cup – the main chamber of the eye – to form in zebrafish embryos. This imaging confirmed that a sheet of precursor cells progressively bends towards its basal surface to form the curved shape of the eyeball. Further analysis revealed that this basal constriction happens when myosin fibres accumulate in clusters along the basal surface of some of the precursor cells. The resulting contraction of the basal surface of the cells relies both on the tension generated by myosin inside the cell and on the cells being attached properly to the extracellular matrix. Using a laser beam, Nicolás-Pérez et al. also destroyed small parts of the basal surface of the retina. This procedure allows the mechanical tension distribution throughout the developing eye to be mapped. Laser ablations revealed a narrow time window during development when destroying small parts of the basal surface can cause the entire sheet of cells to relax, preventing it from curving to form the shape of the eye. Sheets of precursor cells are important building blocks of the nervous system, yet researchers only have limited knowledge of the processes that enable them to fold or bend into a final shape. As such, the findings of Nicolás-Pérez et al. will contribute to a wider understanding of how cells and tissues behave while the brain is forming. DOI:http://dx.doi.org/10.7554/eLife.15797.002
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Affiliation(s)
| | - Franz Kuchling
- Centro Andaluz de Biología del Desarrollo, Seville, Spain.,Centre for Organismal Studies, COS, University of Heidelberg, Heidelberg, Germany
| | | | - Rocío Polvillo
- Centro Andaluz de Biología del Desarrollo, Seville, Spain
| | - Jochen Wittbrodt
- Centre for Organismal Studies, COS, University of Heidelberg, Heidelberg, Germany
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Liu L, Chen L, Mai Z, Peng Z, Yu K, Liu G, Ai H. Cyclical compressive stress induces differentiation of rat primary mandibular condylar chondrocytes through phosphorylated myosin light chain II. Mol Med Rep 2016; 14:4293-4300. [PMID: 27748856 DOI: 10.3892/mmr.2016.5788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 09/05/2016] [Indexed: 11/05/2022] Open
Abstract
The role of myosin light chain II (MLC‑II) in cellular differentiation of rat mandibular condylar chondrocytes (MCCs) induced by cyclical uniaxial compressive stress (CUCS) remains unclear. In the current study, a four‑point bending system was used to apply CUCS to primary cultured MCCs from rats. It was identified that CUCS stimulated features of cellular differentiation including morphological alterations, cytoskeleton rearrangement and overproduction of proteoglycans. Furthermore, CUCS promoted runt‑related transcription factor‑2 (RUNX2) expression at mRNA (P<0.01) and protein levels (P<0.05) and elevated alkaline phosphatase (ALP) activity (P<0.01), which are both markers of osteogenic differentiation. Under conditions of stress, western blotting indicated that the ratio of phosphorylated MLC‑II to total MLC‑II was increased significantly (P<0.05). Silencing MLC‑II by RNA interference reduced ALP activity (P<0.01), and eliminated RUNX2 mRNA expression (P<0.01). Addition of the MLC kinase inhibitor, ML‑7, reduced the CUCS‑associated upregulation of RUNX2 expression (P<0.01) and ALP activity (P<0.01). The data indicated that CUCS promoted cellular differentiation of rat primary MCCs, and this was suggested to be via the phosphorylation of MLC‑II.
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Affiliation(s)
- Limin Liu
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Lin Chen
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Zhihui Mai
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Zhuli Peng
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Kafung Yu
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Guanqi Liu
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Hong Ai
- Department of Stomatology, The Third Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
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35
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Bao L, Liu H, You B, Gu M, Shi S, Shan Y, Li L, Chen J, You Y. Overexpression of IGFBP3 is associated with poor prognosis and tumor metastasis in nasopharyngeal carcinoma. Tumour Biol 2016; 37:15043-15052. [PMID: 27658775 DOI: 10.1007/s13277-016-5400-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/13/2016] [Indexed: 12/12/2022] Open
Abstract
Insulin-like growth factor-binding protein-3 (IGFBP3) is an N-linked glycosylated, phosphorylated protein, which has been reported to regulate cancer progression and metastasis. However, the role of IGFBP3 in tumor metastasis remains under debate. Nasopharyngeal carcinoma (NPC) is a highly metastatic head and neck cancer. And it fails to achieve the desired therapeutic efficacy in patients with metastasis, while the role of IGFBP3 in NPC is still unclear. In this study, we first used immunohistochemistry to explore the expression of IGFBP3 in NPC tissues. We found that IGFBP3 was significantly elevated in NPC and its expression level was correlated with N classification, distant metastasis, and TNM clinical stage (all P < 0.05). Patients with high expression of IGFBP3 had poorer survival rate (P < 0.05). In addition, we found that downregulation of IGFBP3 inhibited cell migration and adhesion by Transwell migration assay, wounding healing assay, and cell adhesion assays in vitro. Besides, NPC cells stimulated with recombinant IGFBP3 accelerated migration and adhesion. These data suggest overexpression of IGFBP3 promotes tumor metastasis in NPC, which makes it a potential therapeutic target.
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Affiliation(s)
- Lili Bao
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Hao Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Bo You
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Miao Gu
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Si Shi
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Ying Shan
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Li Li
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China
| | - Jing Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China.
| | - Yiwen You
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, 226000, China.
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Chevalier N, Gazguez E, Bidault L, Guilbert T, Vias C, Vian E, Watanabe Y, Muller L, Germain S, Bondurand N, Dufour S, Fleury V. How Tissue Mechanical Properties Affect Enteric Neural Crest Cell Migration. Sci Rep 2016; 6:20927. [PMID: 26887292 PMCID: PMC4757826 DOI: 10.1038/srep20927] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 01/13/2016] [Indexed: 12/19/2022] Open
Abstract
Neural crest cells (NCCs) are a population of multipotent cells that migrate extensively during vertebrate development. Alterations to neural crest ontogenesis cause several diseases, including cancers and congenital defects, such as Hirschprung disease, which results from incomplete colonization of the colon by enteric NCCs (ENCCs). We investigated the influence of the stiffness and structure of the environment on ENCC migration in vitro and during colonization of the gastrointestinal tract in chicken and mouse embryos. We showed using tensile stretching and atomic force microscopy (AFM) that the mesenchyme of the gut was initially soft but gradually stiffened during the period of ENCC colonization. Second-harmonic generation (SHG) microscopy revealed that this stiffening was associated with a gradual organization and enrichment of collagen fibers in the developing gut. Ex-vivo 2D cell migration assays showed that ENCCs migrated on substrates with very low levels of stiffness. In 3D collagen gels, the speed of the ENCC migratory front decreased with increasing gel stiffness, whereas no correlation was found between porosity and ENCC migration behavior. Metalloprotease inhibition experiments showed that ENCCs actively degraded collagen in order to progress. These results shed light on the role of the mechanical properties of tissues in ENCC migration during development.
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Affiliation(s)
- N.R. Chevalier
- Laboratoire Matière et Systèmes Complexes, Université Paris-Diderot/CNRS UMR 7057, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - E. Gazguez
- UMR144, CNRS-Institut Curie, 26, rue d’Ulm, 75248 Paris cedex 05, France
| | - L. Bidault
- Collège de France, Center for Interdisciplinary Research in Biology (CIRB), Paris, F-75005, France
- INSERM, U1050, Paris, F-75005, France
- CNRS, UMR 7241, Paris, F-75005, France
| | - T. Guilbert
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - C. Vias
- Laboratoire Matière et Systèmes Complexes, Université Paris-Diderot/CNRS UMR 7057, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - E. Vian
- Laboratoire Matière et Systèmes Complexes, Université Paris-Diderot/CNRS UMR 7057, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - Y. Watanabe
- INSERM U955, Equipe 11, F-94000 Créteil, France
| | - L. Muller
- Collège de France, Center for Interdisciplinary Research in Biology (CIRB), Paris, F-75005, France
- INSERM, U1050, Paris, F-75005, France
- CNRS, UMR 7241, Paris, F-75005, France
| | - S. Germain
- Collège de France, Center for Interdisciplinary Research in Biology (CIRB), Paris, F-75005, France
- INSERM, U1050, Paris, F-75005, France
- CNRS, UMR 7241, Paris, F-75005, France
| | | | - S. Dufour
- UMR144, CNRS-Institut Curie, 26, rue d’Ulm, 75248 Paris cedex 05, France
| | - V. Fleury
- Laboratoire Matière et Systèmes Complexes, Université Paris-Diderot/CNRS UMR 7057, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
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Fernandez-Sanchez ME, Brunet T, Röper JC, Farge E. Mechanotransduction's Impact on Animal Development, Evolution, and Tumorigenesis. Annu Rev Cell Dev Biol 2015; 31:373-97. [DOI: 10.1146/annurev-cellbio-102314-112441] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria-Elena Fernandez-Sanchez
- Mechanics and Genetics of Embryonic and Tumor Development Team, CNRS UMR 168 Physicochimie Curie, Institut Curie Centre de Recherche, PSL Research University; Fondation Pierre-Gilles de Gennes; and INSERM, F-75005 Paris, France;
| | - Thibaut Brunet
- Mechanics and Genetics of Embryonic and Tumor Development Team, CNRS UMR 168 Physicochimie Curie, Institut Curie Centre de Recherche, PSL Research University; Fondation Pierre-Gilles de Gennes; and INSERM, F-75005 Paris, France;
- Evolution of the Nervous System in Bilateria Group, European Molecular Biology Laboratory, D-69117 Heidelberg, Germany
| | - Jens-Christian Röper
- Mechanics and Genetics of Embryonic and Tumor Development Team, CNRS UMR 168 Physicochimie Curie, Institut Curie Centre de Recherche, PSL Research University; Fondation Pierre-Gilles de Gennes; and INSERM, F-75005 Paris, France;
| | - Emmanuel Farge
- Mechanics and Genetics of Embryonic and Tumor Development Team, CNRS UMR 168 Physicochimie Curie, Institut Curie Centre de Recherche, PSL Research University; Fondation Pierre-Gilles de Gennes; and INSERM, F-75005 Paris, France;
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Hákonardóttir GK, López-Ceballos P, Herrera-Reyes AD, Das R, Coombs D, Tanentzapf G. In vivo quantitative analysis of Talin turnover in response to force. Mol Biol Cell 2015; 26:4149-62. [PMID: 26446844 PMCID: PMC4710244 DOI: 10.1091/mbc.e15-05-0304] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 10/01/2015] [Indexed: 12/18/2022] Open
Abstract
Cell–ECM adhesion is regulated by mechanical force. Quantitative imaging and mathematical modeling are used to elucidate how the intracellular adhesion complex of integrin-based adhesions responds to force, revealing the molecular mechanisms that allow the adhesion complex to respond to force to stabilize cell–ECM adhesion over development. Cell adhesion to the extracellular matrix (ECM) allows cells to form and maintain three-dimensional tissue architecture. Cell–ECM adhesions are stabilized upon exposure to mechanical force. In this study, we used quantitative imaging and mathematical modeling to gain mechanistic insight into how integrin-based adhesions respond to increased and decreased mechanical forces. A critical means of regulating integrin-based adhesion is provided by modulating the turnover of integrin and its adhesion complex (integrin adhesion complex [IAC]). The turnover of the IAC component Talin, a known mechanosensor, was analyzed using fluorescence recovery after photobleaching. Experiments were carried out in live, intact flies in genetic backgrounds that increased or decreased the force applied on sites of adhesion. This analysis showed that when force is elevated, the rate of assembly of new adhesions increases such that cell–ECM adhesion is stabilized. Moreover, under conditions of decreased force, the overall rate of turnover, but not the proportion of adhesion complex components undergoing turnover, increases. Using point mutations, we identify the key functional domains of Talin that mediate its response to force. Finally, by fitting a mathematical model to the data, we uncover the mechanisms that mediate the stabilization of ECM-based adhesion during development.
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Affiliation(s)
- Guðlaug Katrín Hákonardóttir
- Department of Cellular and Physiological Sciences, Life Science Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Pablo López-Ceballos
- Department of Cellular and Physiological Sciences, Life Science Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Alejandra Donají Herrera-Reyes
- Department of Mathematics and Institute of Applied Mathematics, University of British Columbia, Vancouver, BC V6T 1Z2, Canada
| | - Raibatak Das
- Department of Integrative Biology, University of Colorado Denver, Denver, CO 80204
| | - Daniel Coombs
- Department of Mathematics and Institute of Applied Mathematics, University of British Columbia, Vancouver, BC V6T 1Z2, Canada
| | - Guy Tanentzapf
- Department of Cellular and Physiological Sciences, Life Science Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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Logue JS, Cartagena-Rivera AX, Baird MA, Davidson MW, Chadwick RS, Waterman CM. Erk regulation of actin capping and bundling by Eps8 promotes cortex tension and leader bleb-based migration. eLife 2015; 4:e08314. [PMID: 26163656 PMCID: PMC4522647 DOI: 10.7554/elife.08314] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 07/10/2015] [Indexed: 11/17/2022] Open
Abstract
Within the confines of tissues, cancer cells can use blebs to migrate. Eps8 is an actin bundling and capping protein whose capping activity is inhibited by Erk, a key MAP kinase that is activated by oncogenic signaling. We tested the hypothesis that Eps8 acts as an Erk effector to modulate actin cortex mechanics and thereby mediate bleb-based migration of cancer cells. Cells confined in a non-adhesive environment migrate in the direction of a very large ‘leader bleb.’ Eps8 bundling activity promotes cortex tension and intracellular pressure to drive leader bleb formation. Eps8 capping and bundling activities act antagonistically to organize actin within leader blebs, and Erk mediates this effect. An Erk biosensor reveals concentrated kinase activity within leader blebs. Bleb contents are trapped by the narrow neck that separates the leader bleb from the cell body. Thus, Erk activity promotes actin bundling by Eps8 to enhance cortex tension and drive the bleb-based migration of cancer cells under non-adhesive confinement. DOI:http://dx.doi.org/10.7554/eLife.08314.001 Cells within an animal have to be able to move both during development and later stages of life. For example, white blood cells have to move around the body and into tissues to fight off infections. Normally, cell movement is heavily controlled and will only happen when it is necessary to keep an animal healthy. However, cancer cells can bypass these controls and ‘metastasize’, or spread to new sites in the body. Cells can move in several different ways: on the one hand, cells can use ‘mesenchymal’ movement, in which the skeleton-like scaffolding of molecules within a cell rearranges to push the cell forward. On the other hand, cells can employ ‘amoeboid’ movement, in which they squeeze their way forward by building up pressure in the cell. Although these different types of movement are only used by some healthy cells and not others, cancer cells can switch between the two. How they do this is still unclear, but now Logue et al. have studied this question using several microscopy techniques. Logue et al. watched skin cancer (or melanoma) cells migrating between a glass plate and a slab of agar, which mimics the confined spaces that cancer cells have to move through within the body. The images showed that the cancer cells formed so-called ‘leader blebs’, finger-like projections that put cells on the right track. The experiments revealed that a protein called Eps8 was responsible for making the skin cancer cells move in this amoeboid fashion. The ‘blebbing’ caused by Eps8 is turned on by another protein called Erk that is often overactive in melanoma cells. Furthermore, Erk can accumulate near and within the cell blebs and this leads to the increased movement of the skin cancer cells. Studying cell movement in melanoma is particularly important because it is the metastatic tumors that kill patients. Therefore, increasing our basic understanding of how cells migrate could eventually lead to better treatment options that stop cancer cells from spreading. DOI:http://dx.doi.org/10.7554/eLife.08314.002
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Affiliation(s)
- Jeremy S Logue
- National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, United States
| | - Alexander X Cartagena-Rivera
- National Institute on Deafness and other Communication Disorders, National Institutes of Health, Bethesda, United States
| | - Michelle A Baird
- National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, United States
| | - Michael W Davidson
- National High Magnetic Field Laboratory and Department of Biological Science, Florida State University, Tallahassee, United States
| | - Richard S Chadwick
- National Institute on Deafness and other Communication Disorders, National Institutes of Health, Bethesda, United States
| | - Clare M Waterman
- National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, United States
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40
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van Buul JD, Geerts D, Huveneers S. Rho GAPs and GEFs: controling switches in endothelial cell adhesion. Cell Adh Migr 2015; 8:108-24. [PMID: 24622613 PMCID: PMC4049857 DOI: 10.4161/cam.27599] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Within blood vessels, endothelial cell–cell and cell–matrix adhesions are crucial to preserve barrier function, and these adhesions are tightly controlled during vascular development, angiogenesis, and transendothelial migration of inflammatory cells. Endothelial cellular signaling that occurs via the family of Rho GTPases coordinates these cell adhesion structures through cytoskeletal remodelling. In turn, Rho GTPases are regulated by GTPase-activating proteins (GAPs) and guanine nucleotide exchange factors (GEFs). To understand how endothelial cells initiate changes in the activity of Rho GTPases, and thereby regulate cell adhesion, we will discuss the role of Rho GAPs and GEFs in vascular biology. Many potentially important Rho regulators have not been studied in detail in endothelial cells. We therefore will first overview which GAPs and GEFs are highly expressed in endothelium, based on comparative gene expression analysis of human endothelial cells compared with other tissue cell types. Subsequently, we discuss the relevance of Rho GAPs and GEFs for endothelial cell adhesion in vascular homeostasis and disease.
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Affiliation(s)
- Jaap D van Buul
- Department of Molecular Cell Biology; Sanquin Research and Swammerdam Institute for Life Sciences; University of Amsterdam; The Netherlands
| | - Dirk Geerts
- Department of Pediatric Oncology/Hematology; Erasmus University Medical Center; Rotterdam, The Netherlands
| | - Stephan Huveneers
- Department of Molecular Cell Biology; Sanquin Research and Swammerdam Institute for Life Sciences; University of Amsterdam; The Netherlands
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41
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Kim TJ, Zheng S, Sun J, Muhamed I, Wu J, Lei L, Kong X, Leckband DE, Wang Y. Dynamic visualization of α-catenin reveals rapid, reversible conformation switching between tension states. Curr Biol 2015; 25:218-224. [PMID: 25544608 PMCID: PMC4302114 DOI: 10.1016/j.cub.2014.11.017] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 09/26/2014] [Accepted: 11/06/2014] [Indexed: 12/13/2022]
Abstract
The cytosolic protein α-catenin is a postulated force transducer at cadherin complexes. The demonstration of force activation, identification of consequent downstream events in live cells, and development of tools to study these dynamic processes in living cells are central to elucidating the role of α-catenin in cellular mechanics and tissue function. Here we demonstrate that α-catenin is a force-activatable mechanotransducer at cell-cell junctions by using an engineered α-catenin conformation sensor based on fluorescence resonance energy transfer (FRET). This sensor reconstitutes α-catenin-dependent functions in α-catenin-depleted cells and recapitulates the behavior of the endogenous protein. Dynamic imaging of cells expressing the sensor demonstrated that α-catenin undergoes immediate, reversible conformation switching in direct response to different mechanical perturbations of cadherin adhesions. Combined magnetic twisting cytometry with dynamic FRET imaging revealed rapid, local conformation switching upon the mechanical stimulation of specific cadherin bonds. At acutely stretched cell-cell junctions, the immediate, reversible conformation change further reveals that α-catenin behaves like an elastic spring in series with cadherin and actin. The force-dependent recruitment of vinculin—a principal α-catenin effector—to junctions requires the vinculin binding site of the α-catenin sensor. In cells, the relative rates of force-dependent α-catenin conformation switching and vinculin recruitment reveal that α-catenin activation and vinculin recruitment occur sequentially, rather than in a concerted process, with vinculin accumulation being significantly slower. This engineered α-catenin sensor revealed that α-catenin is a reversible, stretch-activatable sensor that mechanically links cadherin complexes and actin and is an indispensable player in cadherin-specific mechanotransduction at intercellular junctions.
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Affiliation(s)
- Tae-Jin Kim
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Shuai Zheng
- Department of Bioengineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jie Sun
- Department of Integrative and Molecular Physiology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Ismaeel Muhamed
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jun Wu
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Lei Lei
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Xinyu Kong
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Deborah E Leckband
- Department of Bioengineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Yingxiao Wang
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Integrative and Molecular Physiology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
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42
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Abstract
Epithelia are polarized layers of adherent cells that are the building blocks for organ and appendage structures throughout animals. To preserve tissue architecture and barrier function during both homeostasis and rapid growth, individual epithelial cells divide in a highly constrained manner. Building on decades of research focused on single cells, recent work is probing the mechanisms by which the dynamic process of mitosis is reconciled with the global maintenance of epithelial order during development. These studies reveal how symmetrically dividing cells both exploit and conform to tissue organization to orient their mitotic spindles during division and establish new adhesive junctions during cytokinesis.
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Affiliation(s)
| | - Matthew C Gibson
- Stowers Institute for Medical Research, Kansas City, MO 64110 Department of Anatomy and Cell Biology, Kansas University Medical Center, Kansas City, KS 66160
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Marjoram RJ, Lessey EC, Burridge K. Regulation of RhoA activity by adhesion molecules and mechanotransduction. Curr Mol Med 2014; 14:199-208. [PMID: 24467208 PMCID: PMC3929014 DOI: 10.2174/1566524014666140128104541] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/05/2013] [Accepted: 12/02/2013] [Indexed: 12/26/2022]
Abstract
The low molecular weight GTP-binding protein RhoA regulates many cellular events, including cell migration, organization of the cytoskeleton, cell adhesion, progress through the cell cycle and gene expression. Physical forces influence these cellular processes in part by regulating RhoA activity through mechanotransduction of cell adhesion molecules (e.g. integrins, cadherins, Ig superfamily molecules). RhoA activity is regulated by guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs) that are themselves regulated by many different signaling pathways. Significantly, the engagement of many cell adhesion molecules can affect RhoA activity in both positive and negative ways. In this brief review, we consider how RhoA activity is regulated downstream from cell adhesion molecules and mechanical force. Finally, we highlight the importance of mechanotransduction signaling to RhoA in normal cell biology as well as in certain pathological states.
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Affiliation(s)
| | | | - K Burridge
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA.
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44
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A hybrid mathematical model for self-organizing cell migration in the zebrafish lateral line. J Math Biol 2014; 71:171-214. [DOI: 10.1007/s00285-014-0812-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 06/01/2014] [Indexed: 12/16/2022]
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45
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Affiliation(s)
- Ronen Zaidel-Bar
- Mechanobiology Institute Singapore and Department of Bioengineering, National University of Singapore, Singapore 117411.
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46
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Barry AK, Tabdili H, Muhamed I, Wu J, Shashikanth N, Gomez GA, Yap AS, Gottardi CJ, de Rooij J, Wang N, Leckband DE. α-catenin cytomechanics--role in cadherin-dependent adhesion and mechanotransduction. J Cell Sci 2014; 127:1779-91. [PMID: 24522187 DOI: 10.1242/jcs.139014] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The findings presented here demonstrate the role of α-catenin in cadherin-based adhesion and mechanotransduction in different mechanical contexts. Bead-twisting measurements in conjunction with imaging, and the use of different cell lines and α-catenin mutants reveal that the acute local mechanical manipulation of cadherin bonds triggers vinculin and actin recruitment to cadherin adhesions in an actin- and α-catenin-dependent manner. The modest effect of α-catenin on the two-dimensional binding affinities of cell surface cadherins further suggests that force-activated adhesion strengthening is due to enhanced cadherin-cytoskeletal interactions rather than to α-catenin-dependent affinity modulation. Complementary investigations of cadherin-based rigidity sensing also suggest that, although α-catenin alters traction force generation, it is not the sole regulator of cell contractility on compliant cadherin-coated substrata.
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Affiliation(s)
- Adrienne K Barry
- Department of Biochemistry, University of Illinois, Urbana, IL 61801-3709, USA
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47
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Cram EJ. Mechanotransduction in C. elegans morphogenesis and tissue function. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014; 126:281-316. [PMID: 25081623 DOI: 10.1016/b978-0-12-394624-9.00012-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mechanobiology is an emerging field that investigates how living cells sense and respond to their physical surroundings. Recent interest in the field has been sparked by the finding that stem cells differentiate along different lineages based on the stiffness of the cell surroundings (Engler et al., 2006), and that metastatic behavior of cancer cells is strongly influenced by the mechanical properties of the surrounding tissue (Kumar and Weaver, 2009). Many questions remain about how cells convert mechanical information, such as viscosity, stiffness of the substrate, or stretch state of the cells, into the biochemical signals that control tissue function. Caenorhabditis elegans researchers are making significant contributions to the understanding of mechanotransduction in vivo. This review summarizes recent insights into the role of mechanical forces in morphogenesis and tissue function. Examples of mechanical regulation across length scales, from the single-celled zygote, to the intercellular coordination that enables cohesive tissue function, to the mechanical influences between tissues, are considered. The power of the C. elegans system as a gene discovery and in vivo quantitative bioimaging platform is enabling an important discoveries in this exciting field.
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Affiliation(s)
- Erin J Cram
- Department of Biology, Northeastern University, Boston, Massachusetts, USA
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48
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Abstract
There is a need to characterize biomechanical cell-cell interactions, but due to a lack of suitable experimental methods, relevant in vitro experimental data are often masked by cell-substrate interactions. This study describes a novel method to generate partially lifted substrate-free cell sheets that engage primarily in cell-cell interactions, yet are amenable to biological and chemical perturbations and, importantly, mechanical conditioning and characterization. A polydimethylsiloxane (PDMS) mold is used to isolate a patch of cells, and the patch is then enzymatically lifted. The cells outside the mold remain attached, creating a partially lifted cell sheet. This simple yet powerful tool enables the simultaneous examination of lifted and adherent cells. This tool was then deployed to test the hypothesis that the lifted cells would exhibit substantial reinforcement of key cytoskeletal and junctional components at cell-cell contacts, and that such reinforcement would be enhanced by mechanical conditioning. Results demonstrate that the mechanical strength and cohesion of the substrate-free cell sheets strongly depend on the integrity of the actomyosin cytoskeleton and the cell-cell junctional protein plakoglobin. Both actin and plakoglobin are significantly reinforced at junctions with mechanical conditioning. However, total cellular actin is significantly diminished on dissociation from a substrate and does not recover with mechanical conditioning. These results represent a first systematic examination of mechanical conditioning on cells with primarily intercellular interactions.
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Affiliation(s)
- Qi Wei
- Department of Biomedical Engineering, Columbia University , New York, New York
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49
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Wienken U, Gaub HE. Stamping vital cells - a force-based ligand receptor assay. Biophys J 2013; 105:2687-94. [PMID: 24359740 PMCID: PMC3882508 DOI: 10.1016/j.bpj.2013.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 10/16/2013] [Accepted: 10/16/2013] [Indexed: 01/16/2023] Open
Abstract
Gaining information about receptor profiles on cells, and subsequently finding the most efficient ligands for these signaling receptors, remain challenging tasks in stem cell and cancer research as well as drug development. We introduce a live-cell method with great potential in both screening for surface receptors and analysing binding forces of different ligands. The technique is based on the molecular force assay, a parallel-format, high-throughput experiment on a single-molecule level. On human red blood cells, we demonstrate the detection of the interaction of N-acetyl-α-D-galactosaminyl residues with the lectin helix pomatia agglutinine and of the CD47 receptor with its antibody. The measurements are performed under nearly physiological conditions and still provide a highly specific binding signal. Moreover, with a detailed comparative force analysis on two cell types with different morphology, we show that our method even allows the determination of a DNA force equivalent for the interaction of the CD47 receptor and its antibody.
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Affiliation(s)
- Uta Wienken
- Chair of Experimental Physics & Center for NanoScience, Ludwig-Maximilians-University München, Munich, Germany
| | - Hermann E Gaub
- Chair of Experimental Physics & Center for NanoScience, Ludwig-Maximilians-University München, Munich, Germany.
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50
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Abstract
Morphogenesis is the remarkable process by which cells self-assemble into complex tissues and organs that exhibit specialized form and function during embryological development. Many of the genes and chemical cues that mediate tissue and organ formation have been identified; however, these signals alone are not sufficient to explain how tissues and organs are constructed that exhibit their unique material properties and three-dimensional forms. Here, we review work that has revealed the central role that physical forces and extracellular matrix mechanics play in the control of cell fate switching, pattern formation, and tissue development in the embryo and how these same mechanical signals contribute to tissue homeostasis and developmental control throughout adult life.
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Affiliation(s)
- Tadanori Mammoto
- Vascular Biology Program, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts 02115;
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