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Yin-Biao Sun et al.
The Journal of physiology, 587(1), 155-163 (2008-11-19)
Each heartbeat is triggered by a pulse of intracellular calcium ions which bind to troponin on the actin-containing thin filaments of heart muscle cells, initiating a change in filament structure that allows myosin to bind and generate force. We investigated
Sarah P Short et al.
Molecular cancer research : MCR, 17(4), 882-894 (2019-01-19)
Serine threonine kinase 17A (STK17A) is a ubiquitously expressed kinase originally identified as a regulator of apoptosis; however, whether it functionally contributes to colorectal cancer has not been established. Here, we have analyzed STK17A in colorectal cancer and demonstrated decreased
Marc-David Ruepp et al.
Molecular biology of the cell, 20(24), 5211-5223 (2009-10-30)
Export of mRNA from the nucleus is linked to proper processing and packaging into ribonucleoprotein complexes. Although several observations indicate a coupling between mRNA 3' end formation and export, it is not known how these two processes are mechanistically connected.
Sara De Vincentiis et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 40(26), 4997-5007 (2020-05-24)
Stretch-growth has been defined as a process that extends axons via the application of mechanical forces. In the present article, we used a protocol based on magnetic nanoparticles (NPs) for labeling the entire axon tract of hippocampal neurons, and an
Abhishek Mukherjee et al.
PLoS computational biology, 16(10), e1008300-e1008300 (2020-10-10)
Large nuclear deformations during migration through confined spaces have been associated with nuclear membrane rupture and DNA damage. However, the stresses associated with nuclear damage remain unclear. Here, using a quasi-static plane strain finite element model, we map evolution of
Maria Chiara Lionetti et al.
Biophysical journal, 118(9), 2319-2332 (2020-04-23)
The nuclear morphology of eukaryotic cells is determined by the interplay between the lamina forming the nuclear skeleton, the chromatin inside the nucleus, and the coupling with the cytoskeleton. Nuclear alterations are often associated with pathological conditions as in Hutchinson-Gilford
Hawley E Kunz et al.
The Journal of biological chemistry, 295(51), 17441-17459 (2021-01-18)
Cancer cachexia is characterized by reductions in peripheral lean muscle mass. Prior studies have primarily focused on increased protein breakdown as the driver of cancer-associated muscle wasting. Therapeutic interventions targeting catabolic pathways have, however, largely failed to preserve muscle mass
Jacqueline M Bliley et al.
Science translational medicine, 13(603) (2021-07-23)
The role that mechanical forces play in shaping the structure and function of the heart is critical to understanding heart formation and the etiology of disease but is challenging to study in patients. Engineered heart tissues (EHTs) incorporating human induced
Sonal et al.
Journal of cell science, 132(4) (2018-12-13)
Dynamic reorganization of the actomyosin cytoskeleton allows fast modulation of the cell surface, which is vital for many cellular functions. Myosin-II motors generate the forces required for this remodeling by imparting contractility to actin networks. However, myosin-II activity might also
Shumin Xia et al.
ACS biomaterials science & engineering, 5(8), 3828-3842 (2019-08-12)
The mechanical microenvironment serves as an important factor influencing stem cell differentiation. Mechanobiological responses depend strongly on actomyosin contractility and integrin-based cell-extracellular matrix (ECM) interactions mediated by adhesive structures such as focal adhesions (FAs). While the roles of FAs in
Zhao Wei et al.
Cell stem cell, 27(5), 798-812 (2020-09-16)
Matrix dynamics influence how individual cells develop into complex multicellular tissues. Here, we develop hydrogels with identical polymer components but different crosslinking capacities to enable the investigation of mechanisms underlying vascular morphogenesis. We show that dynamic (D) hydrogels increase the
Floriane Pelon et al.
Nature communications, 11(1), 404-404 (2020-01-23)
Although fibroblast heterogeneity is recognized in primary tumors, both its characterization in and its impact on metastases remain unknown. Here, combining flow cytometry, immunohistochemistry and RNA-sequencing on breast cancer samples, we identify four Cancer-Associated Fibroblast (CAF) subpopulations in metastatic lymph
Eric D Bankaitis et al.
Development (Cambridge, England), 145(18) (2018-08-22)
During mouse pancreas organogenesis, endocrine cells are born from progenitors residing in an epithelial plexus niche. After a period in a lineage-primed Neurog3LO state, progenitors become endocrine committed via upregulation of Neurog3 We find that the Neurog3LO to Neurog3HI transition
Ashwathi S Mohan et al.
Developmental cell, 49(3), 444-460 (2019-05-08)
Actin assembly supplies the structural framework for cell morphology and migration. Beyond structure, this actin framework can also be engaged to drive biochemical signaling programs. Here, we describe how the hyperactivation of Rac1 via the P29S mutation (Rac1P29S) in melanoma
Mariam Hachimi et al.
Current biology : CB, 31(4), 696-706 (2020-12-05)
The actin cortex is involved in many biological processes and needs to be significantly remodeled during cell differentiation. Developing epithelial cells construct a dense apical actin cortex to carry out their barrier and exchange functions. The apical cortex assembles in
Anagha Datar et al.
Biophysical journal, 117(5), 880-891 (2019-08-21)
Axonal beading, or the formation of a series of swellings along the axon, and retraction are commonly observed shape transformations that precede axonal atrophy in Alzheimer's disease, Parkinson's disease, and other neurodegenerative conditions. The mechanisms driving these morphological transformations are
Patrizia Romani et al.
Nature cell biology, 21(3), 338-347 (2019-02-06)
Extracellular matrix (ECM) mechanical cues have powerful effects on cell proliferation, differentiation and death. Here, starting from an unbiased metabolomics approach, we identify synthesis of neutral lipids as a general response to mechanical signals delivered by cell-matrix adhesions. Extracellular physical
The myosin II ATPase inhibitor blebbistatin prevents thrombin-induced inhibition of intercellular calcium wave propagation in corneal endothelial cells
Ponsaerts R, et al.
Investigative Ophthalmology & Visual Science, 49(11), 4816-4827 (2008)
Karl J Wahlin et al.
Frontiers in cell and developmental biology, 9, 764725-764725 (2021-12-07)
Human pluripotent stem cells (PSCs) represent a powerful tool to investigate human eye development and disease. When grown in 3D, they can self-assemble into laminar organized retinas; however, variation in the size, shape and composition of individual organoids exists. Neither
Timothy Fulton et al.
Current biology : CB, 30(15), 2984-2994 (2020-06-20)
A fundamental question in developmental biology is how the early embryo establishes the spatial coordinate system that is later important for the organization of the embryonic body plan. Although we know a lot about the signaling and gene-regulatory networks required
Sarah Bertels et al.
Scientific reports, 11(1), 9269-9269 (2021-05-01)
Mechanotransduction via yes-associated protein (YAP) is a central mechanism for decision-making in mouse embryonic stem cells (mESCs). Nuclear localization of YAP is tightly connected to pluripotency and increases the cell division rate (CDR). How the geometry of the extracellular environment
Angela Alave Reyes-Furrer et al.
Communications biology, 4(1), 1183-1183 (2021-10-16)
A key to enhance the low translatability of preclinical drug discovery are in vitro human three-dimensional (3D) microphysiological systems (MPS). Here, we show a new method for automated engineering of 3D human skeletal muscle models in microplates and functional compound
Taira Mayanagi et al.
The Journal of biological chemistry, 283(45), 31183-31196 (2008-09-06)
Glucocorticoids (GCs) play important roles in numerous cellular processes, including growth, development, homeostasis, inhibition of inflammation, and immunosuppression. Here we found that GC-treated human lung carcinoma A549 cells exhibited the enhanced formation of the thick stress fibers and focal adhesions
Lucas C Klemm et al.
Molecular biology of the cell, 32(17), 1545-1556 (2021-07-01)
Neutrophils migrate in response to chemoattractants to mediate host defense. Chemoattractants drive rapid intracellular cytoskeletal rearrangements including the radiation of microtubules from the microtubule-organizing center (MTOC) toward the rear of polarized neutrophils. Microtubules regulate neutrophil polarity and motility, but little
Xiaodong Feng et al.
Cancer cell, 35(3), 457-472 (2019-02-19)
Activating mutations in GNAQ/GNA11, encoding Gαq G proteins, are initiating oncogenic events in uveal melanoma (UM). However, there are no effective therapies for UM. Using an integrated bioinformatics pipeline, we found that PTK2, encoding focal adhesion kinase (FAK), represents a
Arthur J Kuipers et al.
Biochimica et biophysica acta. Molecular basis of disease, 1864(7), 2409-2419 (2018-04-24)
Mechanically induced signaling pathways are important drivers of tumor progression. However, if and how mechanical signals affect metastasis or therapy response remains poorly understood. We previously found that the channel-kinase TRPM7, a regulator of cellular tension implicated in mechano-sensory processes
Colin D Paul et al.
Biomaterials, 197, 101-118 (2019-01-15)
Biophysical aspects of in vivo tissue microenvironments include microscale mechanical properties, fibrillar alignment, and architecture or topography of the extracellular matrix (ECM). These aspects act in concert with chemical signals from a myriad of diverse ECM proteins to provide cues
Elena Kassianidou et al.
Cell reports, 27(6), 1897-1909 (2019-05-09)
Three-dimensional matrices often contain highly structured adhesive tracks that require cells to turn corners and bridge non-adhesive areas. Here, we investigate these complex processes using micropatterned cell adhesive frames. Spreading kinetics on these matrices depend strongly on initial adhesive position
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Nida Siddiqui et al.
Nature communications, 10(1), 2693-2693 (2019-06-21)
The kinesin-3 KIF1C is a fast organelle transporter implicated in the transport of dense core vesicles in neurons and the delivery of integrins to cell adhesions. Here we report the mechanisms of autoinhibition and release that control the activity of
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