Methylcellulose Crowding Agent
Methylcellulose Crowding Agent - Related Videos
10:23
Crowding
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Human vision depends on light-sensitive neurons that are arranged in the back of the eye on a tissue called the retina. The neurons, called the rods and cones because of their shapes, are not uniformly distributed on the retina. Instead, there is a region in the center of the retina called the macula where cones are densely packed, and especially so in a central sub-region of the macula called the fovea. Outside the fovea there...
09:14
Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding
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Cited by 14 •
2016
We present a protocol to obtain cell-derived matrices rich in extracellular matrix proteins, using macromolecular crowders (MMC). In addition, we present a protocol which incorporates MMC in 3D organotypic skin co-culture generation, which reduces culture time while maintaining maturity of construct.
11:27
Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging
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Cited by 5 •
2016
This protocol describes the preparation and characterization of a dendrimeric magnetic resonance imaging (MRI) contrast agent that carries cyclen-based macrocyclic chelates coordinating paramagnetic gadolinium ions. In a series of MRI experiments in vitro, this agent produced an amplified MRI signal when compared to the commercially available monomeric analogue.
10:19
Reducing Agents
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2023
Source: Vy M. Dong and Daniel Kim, Department of Chemistry, University of California, Irvine, CA Controlling the reactivity and selectivity during the synthesis of a molecule is very important criteria for chemists. This has led to the development of many reagents that allow chemists to pick and choose reagents suitable for a given task. Quite often, a balance between reactivity and selectivity needs to be achieved. This experiment will use IR spectroscopy to monitor the reaction and to...
07:40
Introducing Experimental Agents into the Mouse
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2023
Many investigations performed in mice (Mus musculus) require the administration of an experimental agent to the animal. For example, it may be of interest to test the efficacy of a specific therapy, to induce a pathologic condition, or to administer anesthesia or palliative care. In order to ensure safe and efficient delivery, it is important to consider a variety of factors prior to the administration of the treatment. This video, which reviews agent administration in the mouse, begins by...
FAQs
Its long polymer chains occupy space that other molecules cannot readily access, producing excluded-volume effects. As available solution volume decreases, proteins, nucleic acids, and other macromolecules behave as though their effective concentrations have increased, even when their measured concentrations remain unchanged. This can favor encounters and interactions relevant to biochemical reactions and molecular assembly.
The polymer-rich environment changes how macromolecules move through solution, affecting diffusion and the frequency of molecular encounters. Those physical changes can modify reaction kinetics, including how efficiently enzymes interact with their substrates or how readily macromolecules assemble. Consequently, results obtained with methylcellulose may better reflect behavior under crowded rather than dilute conditions.
Researchers should control methylcellulose use together with the surrounding solution composition and the biological process being measured. Crowding changes can influence molecular confinement, diffusion, reaction kinetics, and assembly, so comparisons require consistent conditions. Controlled variation helps distinguish effects caused by the crowding environment from changes associated with the proteins, nucleic acids, or assays themselves.
It is added to biological systems in a controlled manner to reproduce selected aspects of the dense intracellular environment. Researchers then compare biochemical or cellular behavior under crowded conditions and less crowded conditions, focusing on changes in interactions, reaction efficiency, assembly, or cellular responses. The approach is useful when solution composition and molecular confinement are experimental variables.
Methylcellulose is useful when researchers want to determine whether crowding influences enzyme performance or the formation of molecular assemblies. Its excluded-volume effects can increase effective macromolecular concentrations and change encounter frequencies, allowing experiments to examine how a more intracellular-like environment affects reaction efficiency and assembly behavior. These measurements help connect solution conditions with biochemical outcomes.
In cell-based assays, controlled methylcellulose conditions can help researchers evaluate how an intracellular-like crowded environment affects cellular responses. The polymer provides a way to examine the contribution of molecular confinement and solution composition alongside other experimental factors. Results may reveal whether observed responses depend on crowding-related changes in macromolecular interactions or biochemical processes.