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Direct imaging of single-molecule electrochemical reactions in solution
Optical imaging of single-molecule electrochemical reactions in aqueous solution enables super-resolution electrochemiluminescence microscopy, which can be used to monitor the adhesion dynamics of live cells with high spatiotemporal resolution.
- Jinrun Dong
- , Yuxian Lu
- & Jiandong Feng
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Article |
Mechanics of a multilayer epithelium instruct tumour architecture and function
Mathematical and experimental approaches are used to investigate the mechanical forces that shape the tumour architecture of two different common forms of skin cancer: basal cell carcinomas and invasive squamous cell carcinomas.
- Vincent F. Fiore
- , Matej Krajnc
- & Elaine Fuchs
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Letter |
Force loading explains spatial sensing of ligands by cells
The formation of cellular adhesion complexes is important in normal and pathological cell activity, and is determined by the force imposed by the combined effect of the distribution of extracellular matrix molecules and substrate rigidity.
- Roger Oria
- , Tina Wiegand
- & Pere Roca-Cusachs
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Letter |
A non-canonical Notch complex regulates adherens junctions and vascular barrier function
The transmembrane domain of NOTCH1 plays a key role in the assembly of adherens junctions and the non-transcriptional regulation of vascular permeability that links transcriptional programs with adhesive and cytoskeletal remodelling.
- William J. Polacheck
- , Matthew L. Kutys
- & Christopher S. Chen
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Article |
Astrocytic neuroligins control astrocyte morphogenesis and synaptogenesis
Astrocyte morphogenesis depends on interactions between astrocytic neuroligins and neuronal neurexins.
- Jeff A. Stogsdill
- , Juan Ramirez
- & Cagla Eroglu
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Letter |
Transmission of cytokinesis forces via E-cadherin dilution and actomyosin flows
Under physiological forces, resulting from cytokinesis, the mechanosensitivity of adherens junction arises from a local decrease in E-cadherin concentration and results in actomyosin flows.
- Diana Pinheiro
- , Edouard Hannezo
- & Yohanns Bellaïche
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Letter |
Molecular architecture of the human sperm IZUMO1 and egg JUNO fertilization complex
This study describes the structures of the IZUMO1 protein, found on sperm, and the JUNO protein, found on eggs, and sheds light on their roles in sperm–egg fusion during fertilization.
- Halil Aydin
- , Azmiri Sultana
- & Jeffrey E. Lee
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Article |
The cancer glycocalyx mechanically primes integrin-mediated growth and survival
Metastatic cancer cells are shown to have a tendency towards forming a bulky glycocalyx owing to the production of large glycoproteins, and this cancer-associated glycocalyx has a mechanical effect on the spatial organization of integrins — by funnelling integrins into adhesions, integrin clustering and signalling is promoted, which leads to enhanced cell survival and proliferation.
- Matthew J. Paszek
- , Christopher C. DuFort
- & Valerie M. Weaver
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Letter |
Oncogene-like induction of cellular invasion from centrosome amplification
Cancer cells often have extra centrosomes, a paradox considering the detrimental effect extra centrosomes usually have on cell division; a study of human cells reveals that extra centrosomes can promote cancer cell invasion phenotypes through a pathway involving increased microtubule nucleation and Rac1 activity.
- Susana A. Godinho
- , Remigio Picone
- & David Pellman
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Letter |
A directional switch of integrin signalling and a new anti-thrombotic strategy
The direction of integrin signalling is found to be determined by the coordinated and opposing binding waves of talin and Gα13 to the same region of the integrin β3 cytoplasmic domain at mutually exclusive but distinct sites, and a potent new anti-thrombotic drug that does not cause bleeding is designed on the basis of these findings.
- Bo Shen
- , Xiaojuan Zhao
- & Xiaoping Du
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Letter |
High-molecular-mass hyaluronan mediates the cancer resistance of the naked mole rat
Naked mole rats seem almost entirely protected from developing cancer, and this can now, at least in part, be explained by the production of a unique high-molecular-mass form of hyaluronan, a component of the extracellular matrix; together with an increased sensitivity of naked mole-rat cells to hyaluronan signalling, this form protects its cells from oncogenic transformation.
- Xiao Tian
- , Jorge Azpurua
- & Andrei Seluanov
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Letter |
Severe malaria is associated with parasite binding to endothelial protein C receptor
Endothelial protein C receptor is shown to be the receptor for Plasmodium falciparum erythrocyte membrane protein 1 variants associated with severe malaria.
- Louise Turner
- , Thomas Lavstsen
- & Thor G. Theander
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Letter |
Visualization of splenic marginal zone B-cell shuttling and follicular B-cell egress
Lymphocyte migration in the spleen is visualized live in mice using a real-time two-photon laser-scanning microscopy approach revealing that marginal zone and follicular B cells are highly motile and can shuttle between compartments, and integrin adhesion is the key to cellular retention in the marginal zone.
- Tal I. Arnon
- , Robert M. Horton
- & Jason G. Cyster
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Letter |
Drosophila NOMPC is a mechanotransduction channel subunit for gentle-touch sensation
Mechanotransduction channels studied to date are mainly involved with sensing noxious mechanical stimuli; here NOMPC, a member of the TRP ion channel family, is identified as a pore-forming subunit of an ion channel essential to the sensation of gentle touch in Drosophila.
- Zhiqiang Yan
- , Wei Zhang
- & Yuh Nung Jan
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Letter |
Structure of a force-conveying cadherin bond essential for inner-ear mechanotransduction
A combination of structural, computational and biophysical tools is used to characterize the bond between tip-link proteins protocadherin 15 and cadherin 23, which have an essential role in inner-ear mechanotransduction; the bond, involving an extended protein handshake, is found to be affected by deafness mutations and is mechanically strong enough to resist forces in hair cells, adding to our understanding of hair-cell sensory transduction and interactions among cadherins.
- Marcos Sotomayor
- , Wilhelm A. Weihofen
- & David P. Corey
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Letter |
Protocadherins mediate dendritic self-avoidance in the mammalian nervous system
Protocadherins are found to potentially provide the molecular diversity and complexity required to promote dendritic self-avoidance in mouse retina and cerebellum.
- Julie L. Lefebvre
- , Dimitar Kostadinov
- & Joshua R. Sanes
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Letter |
Cell attachment protein VP8* of a human rotavirus specifically interacts with A-type histo-blood group antigen
This crystallographic study shows the attachment of human rotavirus VP8* to histo blood group A antigen, and suggests how changes within the structure of VP8* could allow switching from sialylated to non-sialylated glycan receptor.
- Liya Hu
- , Sue E. Crawford
- & B. V. Venkataram Prasad
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Letter |
Differential positioning of adherens junctions is associated with initiation of epithelial folding
Shifts in the position of adherens junctions, triggered by a change in the ratio of Bazooka and Par-1, initiate epithelial folding in the Drosophila embryo.
- Yu-Chiun Wang
- , Zia Khan
- & Eric F. Wieschaus
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Letter |
Adherens junction protein nectin-4 is the epithelial receptor for measles virus
Nectin-4 is identified as a receptor for measles virus on epithelial cells, and measles virus might use nectin-4 for emergence in the airways.
- Michael D. Mühlebach
- , Mathieu Mateo
- & Roberto Cattaneo
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Letter |
Mechanical strain in actin networks regulates FilGAP and integrin binding to filamin A
- A. J. Ehrlicher
- , F. Nakamura
- & T. P. Stossel
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Research Highlights |
How blasts hurt the brain
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Review Article |
Dynamic molecular processes mediate cellular mechanotransduction
- Brenton D. Hoffman
- , Carsten Grashoff
- & Martin A. Schwartz
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Letter |
Forces between clustered stereocilia minimize friction in the ear on a subnanometre scale
- Andrei S. Kozlov
- , Johannes Baumgart
- & A. J. Hudspeth
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Letter |
A tension-induced mechanotransduction pathway promotes epithelial morphogenesis
This study describes a mechanotransduction pathway that links the body wall with the epidermis in Caenorhabditis elegans. The pathway involves the p21 activated kinase PAK 1, an adaptor GIT 1 and its partner PIX 1. Tension exerted by muscles or external pressure keeps GIT 1 on station at hemidesmosomes — the small rivet like bodies that attach epidermal cells to the underlying musculature — and stimulates PAK 1 through PIX 1 and Rac GTPase. The C. elegans hemidesmosome is more than a passive attachment structure, therefore, but a sensor that responds to tension by triggering signalling processes.
- Huimin Zhang
- , Frédéric Landmann
- & Michel Labouesse
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Letter |
Nanoscale architecture of integrin-based cell adhesions
Focal adhesions link the extracellular matrix by integrin receptors to cytoplasmic actin filaments and are fundamental to human physiology. These authors determine the molecular architecture of focal adhesions by mapping protein organization at the nanoscale level. The results demonstrate that focal adhesions possess a well-organized ultrastructure made up of at least three spatial and functional compartments that mediate their interdependent functions.
- Pakorn Kanchanawong
- , Gleb Shtengel
- & Clare M. Waterman
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Letter |
Planar polarized actomyosin contractile flows control epithelial junction remodelling
Here, germ-band extension in Drosophila is studied in which epithelial cells undergo an ordered process of intercalation resulting in tissue extension through remodelling of cell junctions. Cell junction shrinkage is driven by polarized flow of medial Myosin-II pulses towards junctions which organizes the whole process of intercalation. The flow of Myosin II is driven by the polarized distribution of E-cadherin complexes at adherens junctions. Thus, epithelial morphogenesis is driven by polarized contractile actomyosin flows emerging from interactions between E-cadherin and actomyosin networks.
- Matteo Rauzi
- , Pierre-François Lenne
- & Thomas Lecuit
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Letter |
Measuring mechanical tension across vinculin reveals regulation of focal adhesion dynamics
The ability of cells to respond to physical forces is central to development and physiology, but until now it has been difficult to directly measure forces across proteins in vivo. Here, however, a calibrated biosensor is described that can measure forces with high sensitivity across specific proteins in cells. This is applied to the vinculin protein, and a regulatory mechanism is revealed in which the force applied to vinculin determines whether focal adhesions assemble or disassemble.
- Carsten Grashoff
- , Brenton D. Hoffman
- & Martin A. Schwartz
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