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SeedEZ 3D cell culture application notes - gel and drug embedding. Many inert polymers used as scaffolds for 3D cell cultures and colony formation are also used in drug delivery systems both in vitro and in vivo. Read this practical guide to learn how SeedEZ lets you merge these two worlds in order to integrate 3D cell cultures into standard drug delivery and testing applications.
By incorporating or adding drugs to SeedEZ, or in polymer matrices embedded in SeedEZ, dosage forms which release a drug over a period of time may be prepared in a desired shape and size. More importantly, all SeedEZ-based dosage forms may be tested in situ, with cells in a 3D cell culture. SeedEZ wicks most sol-state hydrogels, hydrogel precursors, semisolid media, excipient formulations, pharmaceuticals and test compounds. As a result, SeedEZ offers a novel 3D framework for (A) development of sustained release drug delivery systems that are simple to make and convenient to use in vitro; (B) localized or distributed drug delivery into 3D cell cultures using spot-a-culture and spot-a-drug approach, wick, dip or SeedEZ-stack method; (C) gradient formation and testing of drug combination strategies; (D) quality control testing and assurance; and (E) development of test platforms for quasi-steady drug release.
Notably, in most diffusion-driven drug delivery systems, a drug release rate declines in time. A degradable polymer matrix embedded in SeedEZ may enable quasi-steady drug release from a defined volume, defined by SeedEZ, when the matrix degradation rate is adjusted to compensate for this decline via increased drug permeability from the SeedEZ/polymer matrix system.
The application note covers use of common biomaterials, including extracellular matrix hydrogels (Collagen and Matrigel), gels from natural sources for spheroid cultures and controlled drug release (Agarose, Alginate, Methylcellulose, Gelatin), and synthetic materials such as Poloxamers (Pluronic - used for cell encapsulation, drug delivery and pharmaceutical formulations), and Carbomers used in ocular, transdermal, oral and nasal delivery systems.