Cell Contact Reconstitution
Cell Contact Reconstitution - Related Videos
07:05
Reconstitution of Membrane Proteins
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2023
Reconstitution is the process of returning an isolated biomolecule to its original form or function. This is particularly useful for studying membrane proteins, which enable important cellular functions and affect the behavior of nearby lipids. To study the function of purified membrane proteins in situ, they must be reconstituted by integrating them into an artificial lipid membrane. This video introduces membrane protein reconstitution concepts and related procedures, such as protein...
07:52
In Vitro Reconstitution of Spatial Cell Contact Patterns with Isolated Caenorhabditis elegans Embryo Blastomeres and Adhesive Polystyrene Beads
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Cited by 8 •
2019
Tissue complexities of multicellular systems confound the identification of causal relationship between extracellular cues and individual cellular behaviors. Here, we present a method to study the direct link between contact-dependent cues and division axes using C. elegans embryo blastomeres and adhesive polystyrene beads.
01:37
Contact-Dependent Cell Communication
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2026
Contact-dependent cell communication, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas plasmodesmata perform a similar function in plants.Juxtacrine SignalingJuxtacrine signaling...
09:25
In vitro Reconstitution of the Active T. castaneum Telomerase
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Cited by 5 •
2011
Efforts to isolate the catalytic subunit of telomerase, TERT, in sufficient quantities for structural studies, have been met with limited success for more than a decade. Here, we present methods for the isolation of the recombinant Tribolium castaneum TERT (TcTERT) and the reconstitution of the active T. castaneum telomerase ribonucleoprotein (RNP) complex in vitro.
11:29
Development of an Insert Co-culture System of Two Cellular Types in the Absence of Cell-Cell Contact
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Cited by 31 •
2016
In multicellular organisms, secreted soluble factors elicit responses from different cell types as a result of paracrine signaling. Insert co-culture systems offer a simple way to assess the changes mediated by secreted soluble factors in the absence of cell-cell contact.
FAQs
The design places complementary cells or selected contact molecules into controlled contact, allowing changes in cell behavior to be associated with direct receptor engagement, adhesion, or short-range signaling. Because the interaction is examined outside the native tissue environment, researchers can compare contact-dependent effects with conditions in which those defined interactions are absent or altered.
They let researchers reduce a complex tissue interaction to selected molecular or cellular components. Complementary populations can test interactions between cells, whereas purified adhesion or signaling molecules focus attention on particular contact mechanisms. This separation supports quantitative comparisons of ligand-receptor combinations and helps connect a defined molecular interaction with a measurable behavioral response.
Receptor engagement can reveal how recognition of a contact ligand changes cellular behavior, while adhesion shows how physical attachment contributes to that response. Short-range signaling may provide an additional contact-linked cue. Examining these features in controlled combinations helps determine whether an outcome reflects molecular signaling, adhesive interaction, or their coordinated effects.
In developmental biology, controlled contacts can be used to examine how local interactions influence tissue organization, cell fate specification, and morphogenesis. The approach links contact molecules and signaling conditions to the formation or remodeling of multicellular structures. This makes it possible to study how defined cell-cell interactions contribute to larger developmental patterns.
A basic design begins by selecting complementary cell populations or purified adhesion and signaling components relevant to the question. These elements are then placed into defined contact conditions, with ligand-receptor combinations or signaling conditions varied for comparison. Researchers assess resulting changes in cell behavior and use those comparisons to identify contact-dependent effects.
Quantitative comparisons can show whether different ligand-receptor combinations or signaling conditions produce distinct cellular responses. Interpreting these differences helps identify which molecular contacts are associated with changes in behavior, organization, or structure. The resulting measurements connect specific contact conditions to developmental outcomes rather than treating the tissue response as a single unexplained effect.