Results 71 to 80 of about 726,631 (184)

Ect2/Pbl Acts via Rho and Polarity Proteins to Direct the Assembly of an Isotropic Actomyosin Cortex upon Mitotic Entry. [PDF]

, 2015
Entry into mitosis is accompanied by profound changes in cortical actomyosin organization. Here, we delineate a pathway downstream of the RhoGEF Pbl/Ect2 that directs this process in a model epithelium.
Vlassaks, E, Baum, B, Pichaud, F, Rosa, A   +3 more
core  

Sequential Patterning of Photoresponsive Hydrogels Directs Crypt Fission and Reveals the Role of Epithelial Curvature on Fission Symmetry

Advanced Science, EarlyView.
Deterministic crypt fission is achieved in intestinal organoids using photopatternable hydrogels with spatiotemporal control. Daughter‐crypt symmetry is shown to depend on parent‐crypt geometry and epithelial curvature, while myosin‐dependent mechanosensing links tissue shape to regenerative outcomes.
Delaney L. McNally, Kaustav Bera, Nolan R. Petrich, Alex Khang, Marilyne Coulombe, David Castillo‐Azofeifa, Ophir D. Klein, Peter J. Dempsey, Kristi S. Anseth   +8 more
wiley   +1 more source

The Interplay of Curvature, Geometry, and Topology Shapes Tissue Organisation in Epithelial Shells

Advanced Science, EarlyView.
Purely geometric 3D Voronoi models predict the organisation of epithelial shells. The interplay of curvature, geometry, and topology enriches the number of pentagons in shells with lower number of cells. Small MDCK cysts and Mouse embryos match the top polygonal configurations in a compactness‐based ranking derived from the Voronoi model. In conclusion,
Laura Morato, Jesús A. Andrés‐San Román, Juan Garrido‐García, Carmen Gordillo‐Vázquez, Ana M. Palacios, Elisabeth Lidueña‐Fernández, Katie McDole, Pedro Gómez‐Gálvez, Valentina Annese, Luis M. Escudero   +9 more
wiley   +1 more source

Actin turnover maintains actin filament homeostasis during cytokinetic ring contraction [PDF]

, 2017
Cytokinesis in many eukaryotes involves a tension-generating actomyosin-based contractile ring. Many components of actomyosin rings turn over during contraction, although the significance of this turnover has remained enigmatic.
Balasubramanian, Mohan K., Anton Kamnev, Sivaraj Sivaramakrishnan, Sommese, Ruth, Gu, Ying, Sivaramakrishnan, Sivaraj, Junqi Huang, Palani, Saravanan, Oliferenko, Snezhana, Kamnev, Anton, Ying Gu, Mohan K. Balasubramanian, Chew, Ting Gang, Hatano, Tomoyuki, Ting Gang Chew, Ruth Sommese, Tomoyuki Hatano, Snezhana Oliferenko, Huang, Junqi, Saravanan Palani, Oliferenko, Snezhana; id_orcid   +20 more
core   +1 more source

Cellular contractility requires ubiquitin mediated proteolysis. [PDF]

PLoS ONE, 2009
BACKGROUND:Cellular contractility, essential for cell movement and proliferation, is regulated by microtubules, RhoA and actomyosin. The RhoA dependent kinase ROCK ensures the phosphorylation of the regulatory Myosin II Light Chain (MLC) Ser19, thereby ...
Yuval Cinnamon, Oren Feine, Helfrid Hochegger, Alexander Bershadsky, Michael Brandeis   +4 more
doaj   +1 more source

Real‐Time Monitoring of Mass and Mechanical Properties in Single Cells and Multicellular Spheroids

Advanced Science, EarlyView.
This study introduces photothermally actuated microcantilevers combined with optical microscopy to simultaneously measure morphology, mass, and mechanical properties of cellular systems in real‐time. The findings link cytoplasm‐dominated mechanical energy dissipation to the Q‐factor as a novel biophysical parameter.
Ilaria Incaviglia, Giulia E. M. Ammirati, Sophie Herzog, Tommy Krug, Nico Strohmeyer, Miguel Camacho Rufino, Matthias P. Lutolf, David A. Weitz, Daniel J. Müller   +8 more
wiley   +1 more source

Animal Cell Cytokinesis: The Rho-Dependent Actomyosin-Anilloseptin Contractile Ring as a Membrane Microdomain Gathering, Compressing, and Sorting Machine

Frontiers in Cell and Developmental Biology, 2020
Cytokinesis is the last step of cell division that partitions the cellular organelles and cytoplasm of one cell into two. In animal cells, cytokinesis requires Rho-GTPase-dependent assembly of F-actin and myosin II (actomyosin) to form an equatorial ...
Sabrya C. Carim, Amel Kechad, Gilles R. X. Hickson, Gilles R. X. Hickson   +3 more
doaj   +1 more source

A Spatiotemporal Single‐Cell Atlas Uncovers Dysregulated ECM Dynamics and Septal Remodeling Arrest in Human Ventricular Septal Defects

Advanced Science, EarlyView.
Integrating single‐cell and spatial transcriptomics reveals human ventricular septal defect (VSD) as a disease of microenvironmental insufficiency and structural remodeling arrest. Attenuated endothelial‐fibroblast crosstalk, alongside downregulated THBS1/TGF‐β1 and MMP2 signaling networks, impairs the endothelial‐to‐mesenchymal transition (EndoMT) and
Xiaoyuan Zhang, Lun Zhu, Ze Sun, Ruolin Jia, Ziming Wang, Jiayao Zhao, Bohao Liu, Haiqing Xiong, Xiaowei Yu, Yanzhu Yue   +9 more
wiley   +1 more source

In Situ Photo‑Crosslinked Functional Bilayer Hydrogel Modulates Local Microenvironment and Remyelination After Optic Nerve Injury

Advanced Science, EarlyView.
A blue‐light‐crosslinked bilayer hydrogel was developed for local optic nerve repair. The adhesive GM‐Odex outer layer seals and anchors the lesion, while the non‐adhesive GM‐imid inner layer releases MPDA‐Cle without obstructing CSF flow. This system modulates oxidative and inflammatory microenvironments, supports oligodendrocyte differentiation and ...
Tonghe Pan, Yate Huang, Junhao Zhang, Shudong Tian, Zhixing Li, Xuanwen Li, Yanchen Zhang, Dongmei Wang, Sihao Ye, Ming Jin, Neng Ling, Wentao Yan, Kaihui Nan, Wencan Wu   +13 more
wiley   +1 more source

Rab1 interacts with GOLPH3 and controls Golgi structure and contractile ring constriction during cytokinesis in Drosophila melanogaster [PDF]

Open Biology, 2017
Cytokinesis requires a tight coordination between actomyosin ring constriction and new membrane addition along the ingressing cleavage furrow. However, the molecular mechanisms underlying vesicle trafficking to the equatorial site and how this process is
Stefano Sechi, Anna Frappaolo, Roberta Fraschini, Luisa Capalbo, Marco Gottardo, Giorgio Belloni, David M. Glover, Alan Wainman, Maria Grazia Giansanti   +8 more
doaj   +1 more source