All articles tagged with #microtubules
A new study suggests Alzheimer's may start when amyloid beta competes with tau for binding to microtubules in neurons, displacing tau and destabilizing the cell’s transport system. This microtubule nexus could unify amyloid- and tau-centered theories and open pathways for therapies that target tau displacement from microtubules.
A Wellesley College study found rats given a microtubule-stabilizing treatment stayed conscious longer under anesthesia, lending experimental support to Orch OR—the idea that consciousness arises from quantum processes in the brain—and suggesting quantum effects might persist at physiological temperatures; although controversial, the result fuels the debate on whether consciousness could extend beyond the brain, if validated.
This study reveals the in situ structural mechanism by which epothilone-B promotes CNS axon regeneration, utilizing cryo-EM and electron tomography to analyze microtubule stabilization and dynamics in regenerating axons.
The article explores how nature employs origami-like folding mechanisms, such as in insect wings and microscopic protists, inspiring technological innovations like deployable space structures and robotic wings, highlighting the intricate physics and potential applications of biological folds.
Recent research identifies dendritic nanotubular bridges in the brain that facilitate intercellular transport of ions, molecules, and proteins, potentially impacting understanding of neural communication and neurodegenerative diseases like Alzheimer's.
A controversial theory suggests that consciousness may involve quantum entanglement within microtubules in neurons, potentially linking our minds to the universe, supported by recent experimental evidence and ongoing research, though it remains unproven and debated among scientists.
Scientists in Spain have captured the first detailed images of a human cell's microtubule formation process, shedding light on how these structures are built during cell division. The discovery could lead to targeted treatments for cancer and other conditions, as microtubules play a crucial role in cell biology. The high-resolution visuals and atomic-scale film reveal the intricate process of microtubule nucleation and the role of the gamma-tubulin ring complex (γ-TuRC) in guiding their formation. Understanding this process may offer new therapeutic approaches and insights into preventing cancer cells from dividing.
Researchers have captured the first atomic-scale "movie" showing how human cells initiate the construction of microtubules, crucial structures involved in cell division and various cellular functions. The study, published in Science, reveals the process of microtubule nucleation, shedding light on the formation of these tiny tube-shaped structures and their role in pulling apart duplicated genetic material during cell division. The findings provide fundamental insights with potential implications for treating diseases such as cancer and neurodevelopmental disorders, offering a basis for developing more targeted therapeutic approaches.
Physicists at the Georgia Institute of Technology have developed a new model of active matter, focusing on the motion of microtubules, which are rod-like objects found in cells. By using a data-driven approach, they discovered that the dominant physical effects controlling the interaction between microtubules and the surrounding fluid are different from what was previously assumed. The study provides insights into the relationships between the orientation and motion of microtubules on a macroscopic scale and helps explain previously unexplained experimental results. The researchers emphasize the importance of data-driven methods in challenging traditional assumptions and advancing understanding in the field of active matter.
Mutations in the NEK1 gene, a major genetic cause of ALS, disrupt the structure of nerve fibers and hinder the movement of molecules inside nerve cells, according to a study by Northwestern University. The research identified two pathways affected by NEK1 mutations: disruptions in microtubule function, which support the structure of motor neurons, and disruptions in nuclear import, the movement of molecules in and out of the nucleus. Treating NEK1-mutant motor neurons with certain cancer drugs improved nuclear import, suggesting a connection between the two processes. The findings provide potential therapeutic targets for ALS treatment.
Researchers from EPFL and the University of Geneva have developed "designer tubulins" with specific post-translational modifications (PTMs) to gain insights into the functions of tubulin in cells. By engineering tubulins with precise combinations of PTMs, the team discovered an interaction between two key PTMs, polyglutamylation and detyrosination, which play crucial roles in diseases. This new method of producing tubulins with defined PTMs can advance our understanding of their molecular function and provide insights into how dysregulation of these PTMs leads to diseases.