Biomedicina: Envíos recientes
Mostrando ítems 721-740 de 779
Albumin in decompensated cirrhosis: new concepts and perspectives
The pathophysiological background of decompensated cirrhosis is characterised by a systemic proinflammatory and pro-oxidant milieu that plays a major role in the development of multiorgan dysfunction. Such abnormality is ...
Intermittent hypoxia increases kidney tumor vascularization in a murine model of sleep apnea
We investigate the effects of intermittent hypoxia (IH), a characteristic feature of obstructive sleep apnea (OSA), on renal cancer progression in an animal and cell model. An in vivo mouse model (Balb/c, n = 50) of kidney ...
Molecular clutch drives cell response to surface viscosity
Cell response to matrix rigidity has been explained by the mechanical properties of the actin-talin-integrin-fibronectin clutch. Here the molecular clutch model is extended to account for cell interactions with purely ...
Parametric modeling of mechanical effects on circadian oscillators
Circadian rhythms are archetypal examples of nonlinear oscillations. While these oscillations are usually attributed to circuits of biochemical interactions among clock genes and proteins, recent experimental studies reveal ...
Optogenetic control of cellular forces and mechanotransduction
Contractile forces are the end effectors of cell migration, division, morphogenesis, wound healing and cancer invasion. Here we report optogenetic tools to upregulate and downregulate such forces with high spatiotemporal ...
Cell Migration Driven by Cooperative Substrate Deformation Patterns
Most eukaryotic cells sense and respond to the mechanical properties of their surroundings. This can strongly influence their collective behavior in embryonic development, tissue function, and wound healing. We use a ...
Measuring mechanical stress in living tissues
Living tissues are active, multifunctional materials capable of generating, sensing, withstanding and responding to mechanical stress. These capabilities enable tissues to adopt complex shapes during development, to sustain ...
Discussion of 'Cytoskeletal Mechanics Regulating Amoeboid Cell Locomotion' (Alvarez-Gonzalez, B.; Bastounis, E.; Meili, R.; del Alamo, J. C.; Firtel, R. A.; Lasheras, J. C.; 2014, Applied Mechanichs Reviews, 66(5), p. 050804)
A virtually universal feature of adherent cells is their ability to exert traction forces. To measure these forces, several methods have been developed over the past 15 years. In this issue of Applied Mechanics Reviews, ...
Analysis of co-isogenic prion protein deficient mice reveals behavioral deficits, learning impairment, and enhanced hippocampal excitability
Background Cellular prion protein (PrP(C)) is a cell surface GPI-anchored protein, usually known for its role in the pathogenesis of human and animal prionopathies. However, increasing knowledge about the participation of ...
Proteomics Analysis of Extracellular Matrix Remodeling During Zebrafish Heart Regeneration
Adult zebrafish, in contrast to mammals, are able to regenerate their hearts in response to injury or experimental amputation. Our understanding of the cellular and molecular bases that underlie this process, although ...
Technology for noninvasive mechanical ventilation: looking into the black box
Current devices for providing noninvasive respiratory support contain sensors and built-in intelligence for automatically modifying ventilation according to the patient's needs. These devices, including automatic continuous ...
Quantifying forces in cell biology
Cells exert, sense, and respond to physical forces through an astounding diversity of mechanisms. Here we review recently developed tools to quantify the forces generated by cells. We first review technologies based on ...
Interleukin-1β Modulation of the Mechanobiology of Primary Human Pulmonary Fibroblasts: Potential Implications in Lung Repair
Pro-inflammatory cytokines like interleukin-1β (IL-1β) are upregulated during early responses to tissue damage and are expected to transiently compromise the mechanical microenvironment. Fibroblasts are key regulators of ...
The force loading rate drives cell mechanosensing through both reinforcement and cytoskeletal softening.
Cell response to force regulates essential processes in health and disease. However, the fundamental mechanical variables that cells sense and respond to remain unclear. Here we show that the rate of force application ...
Force loading explains spatial sensing of ligands by cells
Cells can sense the density and distribution of extracellular matrix (ECM) molecules by means of individual integrin proteins and larger, integrin-containing adhesion complexes within the cell membrane. This spatial sensing ...
Development of Cell-Derived Matrices for Three-Dimensional In Vitro Cancer Cell Models
Most morphogenetic and pathological processes are driven by cells responding to the surrounding matrix, such as its composition, architecture, and mechanical properties. Despite increasing evidence for the role of extracellular ...
Mechanochemical feedback control of dynamin independent endocytosis modulates membrane tension in adherent cells
Plasma membrane tension regulates many key cellular processes. It is modulated by, and can modulate, membrane trafficking. However, the cellular pathway(s) involved in this interplay is poorly understood. Here we find that, ...
Lung Extracellular Matrix Hydrogels Enhance Preservation of Type II Phenotype in Primary Alveolar Epithelial Cells
One of the main limitations of in vitro studies on lung diseases is the difficulty of maintaining the type II phenotype of alveolar epithelial cells in culture. This fact has previously been related to the translocation ...
A low-cost, easy-to-assemble device to prevent infant hyperthermia under conditions of high thermal stress
High ambient temperature and humidity greatly increase the risk of hyperthermia and mortality, particularly in infants, who are especially prone to dehydration. World areas at high risk of heat stress include many of the ...
Epigenetic reprogramming of tumor-associated fibroblasts in lung cancer: therapeutic opportunities
Lung cancer is the leading cause of cancer-related death worldwide. The desmoplastic stroma of lung cancer and other solid tumors is rich in tumor-associated fibroblasts (TAFs) exhibiting an activated/myofibroblast-like ...
