Cationic Polymers
Cationic Polymers - Related Videos
04:21
Enhancing Viral Transduction in Natural Killer Cells Using a Cationic Polymer
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2025
This video demonstrates an assay for cationic polymer-mediated viral transduction in natural killer (NK) cells. The cells are incubated with transgenic lentivirus vectors encoding a fluorescent protein. The addition of a cationic polymer enables the virus to attach to the cells and integrate its RNA into the host genome, expressing the fluorescent protein. The fluorescence is quantified to assess the polymer-induced enhancement of transduction.
08:01
Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
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Cited by 4 •
2019
In this work, we prepared an adsorbent composed of the cationic N,N-dimethylamino propylacrylamide methyl chloride quaternary (DMAPAAQ) polymer gel and iron hydroxide for adsorbing arsenic from groundwater. The gel was prepared via a novel method designed to ensure the maximum content of iron particles in its structure.
02:34
Polymers
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2020
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
06:49
Lentiviral Mediated Delivery of shRNAs to hESCs and NPCs Using Low-cost Cationic Polymer Polyethylenimine (PEI)
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2022
Using the low-cost cationic polymer polyethylenimine (PEI), we produced lentiviral particles for stable expression of shRNAs in H9 human embryonic stem cells (hESCs) and transiently transduced H9-derived neural progenitor cells (NPCs) at high efficiency.
06:16
MALDI-ToF MS Method for the Characterization of Synthetic Polymers with Varying Dispersity and End Groups
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2025
This protocol provides detailed instructions and examples for sample preparation, data acquisition, and data analysis to characterize synthetic polymers with varying dispersity and end-groups using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
FAQs
Charge density influences both binding strength and biological behavior. Higher density can strengthen electrostatic association with nucleic acids, proteins, and anionic membranes, but the resulting activity also depends on polymer structure and surrounding conditions. Charge therefore serves as a design variable rather than a standalone predictor, because changing it may affect cargo condensation, membrane interaction, cellular responses, and compatibility.
Environmental conditions can alter particle formation, cellular uptake, and biological activity in cationic polymer systems. Because these outcomes depend on both polymer characteristics and the surrounding biological context, studies should evaluate performance under the intended conditions. Comparing conditions helps distinguish weak cargo association from changes in cell interaction, particle behavior, or overall biological activity.
Polymer structure helps determine whether electrostatic interactions produce stable cargo-containing particles and how those particles associate with cell surfaces. Structural differences can therefore influence nanoscale complex formation, membrane contact, and subsequent uptake. Examining these linked steps is important when optimizing delivery systems, because efficient particle formation does not by itself establish efficient cellular interaction or biological performance.
A delivery study combines the polymer with nucleic acid or drug cargo so electrostatic interactions can condense the material into nanoscale complexes. Researchers then examine particle formation, membrane association, cellular uptake, and biological activity. This workflow connects polymer design to delivery outcomes and helps evaluate whether a formulation improves cargo handling while maintaining suitable cellular compatibility.
They are selected when a delivery strategy benefits from interactions with negatively charged cargo or cell surfaces. In gene delivery, they can condense nucleic acids; in drug delivery, they support formation of cargo-containing complexes and membrane association. Researchers consider polymer structure, charge density, uptake, biological activity, and compatibility when assessing whether the material suits a particular system.
Cationic polymers are also investigated in antimicrobial coatings, biosensing, tissue engineering, and broader biomaterials research. In these settings, controlled charge can influence interactions with biological surfaces and molecules, which may help researchers tune cellular responses, sensing-related interactions, or material compatibility. These applications show that their value extends beyond transporting therapeutic or genetic cargo.