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Assays to Examine Transmembrane Semaphorin Function In Vitro.

Rachel Q Liu¹, Kristen Browne¹, Timothy P O'Connor²

¹Graduate Program in Neuroscience, Department of Cellular and Physiological Sciences, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC, Canada, V6T 1Z3.

Methods in Molecular Biology (Clifton, N.J.)

|October 28, 2016

Summary

Semaphorins are proteins crucial for nervous system development. New assays are presented to effectively test the function of transmembrane semaphorins, overcoming previous challenges in studying these important guidance cues.

Keywords:

Cell island Dissociated neurons HEK 293 cells Neuronal explants Sema5A Sema5B

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Area of Science:

Neuroscience
Cell Biology
Developmental Biology

Background:

Semaphorins are a diverse protein family involved in neural development and tissue function.
Primarily known as guidance cues, semaphorins can act as inhibitory, attractive, or permissive signals.
Studying transmembrane semaphorins has been difficult due to a lack of effective assays.

Purpose of the Study:

To introduce and validate two novel assays for assessing transmembrane semaphorin function.
To provide reliable methods for analyzing semaphorin signaling in neural development.

Main Methods:

Assay 1: Evaluating neurite outgrowth in response to a constant source of transmembrane semaphorin.
Assay 2: Observing neuronal growth patterns across cellular islands expressing transmembrane semaphorins.

Main Results:

Both developed assays are effective in testing transmembrane semaphorin function.
The assays are relatively simple to perform and yield useful data on semaphorin signaling.

Conclusions:

The presented assays offer a practical solution for studying transmembrane semaphorins.
These methods facilitate a deeper understanding of semaphorin roles in biological systems.