Dermal Gel Preparation
Dermal Gel Preparation - Related Videos
03:32
Generating Neurons by Reprogramming Human Dermal Fibroblast Cells
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2025
The video demonstrates the generation of neurons from adult human dermal fibroblasts (aHDFs). The aHDFs are reprogrammed using a lentiviral vector carrying genes for neuronal transcription factors and short hairpin RNAs (shRNAs). The shRNAs inhibit the expression of a neuronal transcriptional repressor, and the neuronal transcription factors activate genes to differentiate aHDFs into neurons. These reprogrammed aHDFs are cultured in an early and a late neuronal conversion medium to generate...
06:04
Murine Dermal Fibroblast Isolation by FACS
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Cited by 28 •
2016
Fibroblast behavior underlies a spectrum of clinical entities, but they remain poorly characterized, largely due to their inherent heterogeneity. Traditional fibroblast research relies upon in vitro manipulation, masking in vivo fibroblast behavior. We describe a FACS-based protocol for the isolation of mouse skin fibroblasts that does not require cell culture.
10:24
Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
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Cited by 16 •
2016
Collagen is a core component of the ECM, and provides essential cues for several cellular processes ranging from migration to differentiation and proliferation. Provided here is a protocol for embedding cells within 3D collagen hydrogels, and a more advanced technique for generating randomized or aligned collagen matrices using PDMS microchannels.
06:30
Gel Purification
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2023
Gel purification is used to recover DNA fragments after electrophoretic separation. DNA recovery from an agarose gel includes three basic steps: binding, washing and eluting from a silica column. DNA is believed to bind to silica in the presence of high salt via a salt bridge. Following binding, DNA is washed of impurities and eluted under low salt conditions disrupting this interaction. This video goes through a step-by-step, generalized procedure for cutting out a band from the gel, gel...
09:22
DNA Gel Electrophoresis
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2023
DNA gel electrophoresis is a technique used for the detection and separation of DNA molecules. An electric field is applied to a gel matrix comprised of agarose, and within the gel, charge particles will migrate and separate based on size. The negatively charged phosphates of the DNA backbone cause DNA fragments to move toward the anode - a positively charged electrode. The video explains the mechanism by which DNA fragments are resolved on an agarose gel, and it provides a step-by-step...
FAQs
Hydrating or dispersing the gelling polymer establishes the formulation’s semisolid structure and strongly affects viscosity. The extent and quality of hydration determine whether the material can be mixed consistently, remain stable during use, and support the intended release of an active compound. Researchers therefore treat polymer hydration as a central formulation variable rather than a preliminary step with no effect on performance.
Viscosity determines how the formulation behaves during application, while composition and mixing conditions also influence how an active compound is released. Increasing attention to one property without considering the other can undermine the experimental delivery goal. Formulators adjust the gel to achieve a practical application profile while retaining release behavior suitable for evaluating exposure in skin tissues.
The vehicle provides the medium in which the gelling polymer is dispersed or hydrated and contributes to the overall composition of the preparation. Selecting and adjusting an aqueous or hydroalcoholic system helps researchers balance application properties, stability, viscosity, and delivery objectives. This balance matters when the same formulation must be workable on skin and useful for studying an active compound.
Mixing conditions are adjusted alongside composition to obtain suitable viscosity, stability, and drug release. Consistent mixing helps distribute or hydrate the gelling polymer throughout the vehicle, supporting a more uniform semisolid preparation. In an experimental setting, controlling this step improves the likelihood that differences in skin exposure or biological response reflect the candidate compound rather than inconsistent formulation quality.
A typical workflow begins by dispersing or hydrating the selected gelling polymer in an aqueous or hydroalcoholic vehicle. Researchers then adjust the composition and mixing conditions until the preparation reaches suitable viscosity, stability, and release characteristics. The resulting gel can be used in topical treatment models to examine how a candidate anticancer agent behaves at or near skin tissues.
This approach is useful when investigators need to administer a candidate anticancer agent to skin tissues and examine local effects. It supports studies of permeation, local exposure, and biological responses in topical treatment models. Because composition can be adjusted, the gel also provides a way to investigate whether application properties and experimental delivery goals can be balanced within one preparation.
Topical studies can show how effectively an active compound permeates skin tissues, the extent of its local exposure, and whether it produces measurable biological effects in the model. These outcomes connect formulation behavior with experimental response. A dermal gel therefore helps researchers evaluate delivery and activity together, rather than examining the compound’s biological effect without considering how it reaches the tissue.