Trans Adhesion Assay
Trans Adhesion Assay - Related Videos
04:16
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In this video, we demonstrate the technique to measure transcellular interactions between synaptic cell adhesion molecules through the HEK cell aggregation assay. In this assay, an equal number of HEK cells expressing a desired presynaptic cell adhesion molecule and a fluorescent protein are mixed with HEK cells expressing a post-synaptic cell adhesion molecule and another fluorescent protein. The interaction between the cell adhesion molecules forces the cells to aggregate, which can be...
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11:49
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12:42
Human Neutrophil Flow Chamber Adhesion Assay
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04:36
Assay for Adhesion and Agar Invasion in S. cerevisiae
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FAQs
The assay places one adhesion partner on one cell or substrate and a potential partner on the opposing surface. If the molecules recognize one another, their interaction brings the surfaces together. Comparing adhesion produced by different partner combinations allows investigators to evaluate binding specificity, while the measured degree of adhesion provides information about the strength of the interaction.
Opposing presentation models the arrangement of molecules across a contact between two cells. This orientation is especially relevant to neurons because adhesion molecules can participate in interactions between pre- and postsynaptic sites. Measuring whether the paired surfaces adhere helps connect molecular recognition with the organization and maintenance of contacts that support synapse formation and neural connectivity.
A Trans Adhesion Assay can compare how different adhesion partners, disease-associated variants, or engineered variants promote surface association. Differences in measured adhesion strength or binding specificity indicate that a molecular change may alter recognition between the opposing surfaces. In neuroscience, such comparisons help assess how altered trans-synaptic proteins could influence synapse organization or circuit development.
The assay focuses on the direct interaction between paired adhesion partners, providing a way to examine molecular recognition independently of the full cellular environment. Results can show whether a candidate interaction occurs and how strongly or selectively the surfaces associate. These measurements offer a mechanistic foundation for interpreting later questions about synapse formation, connectivity, and neural circuit development.
Two main formats are supported: a cell-based arrangement, in which each adhesion partner is displayed on a different cell, and a protein-based arrangement, in which partners are presented on opposing substrates. In either format, investigators pair the candidate molecules, allow the surfaces to interact, and quantify the resulting adhesion or binding behavior.
Neuroscientists can use the assay when they need to test a specific adhesion-molecule pair or compare defined molecular variants. By reducing the interaction to opposing partners, the method helps characterize trans-synaptic proteins and their recognition properties. Those findings can then clarify how molecular interactions contribute to pre- and postsynaptic organization, connectivity, and developing neural circuits.