Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional Studies

Brice Miller; Ashli Powell; Berenice A. Gutierrez; Agenor Limon

doi:10.3791/64024

Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional ...

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Neuroscience

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JoVE Journal Neuroscience

Microtransplantation of Synaptic Membranes to Reactivate Human Synaptic Receptors for Functional Studies

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10:08 min

July 20, 2022

DOI: 10.3791/64024-v

Brice Miller*¹, Ashli Powell*¹, Berenice A. Gutierrez¹, Agenor Limon¹

¹The Mitchell Center for Neurodegenerative Diseases, Department of Neurology,University of Texas Medical Branch

Overview

This study demonstrates the microtransplantation of synaptic membranes into Xenopus laevis oocytes to record reliable responses of synaptic receptors, specifically AMPA and GABA receptors. This technique provides insights into the functioning of native brain receptors, related to various neurodegenerative and mental health disorders.

Key Study Components

Area of Science

Neuroscience
Electrophysiology
Synaptic Communication

Background

Neurodegenerative and mental health disorders are associated with changes in synaptic receptor functions.
Understanding these changes can lead to better therapies for restoring receptor functionality.
The technique of microtransplantation allows for direct measurement of native receptors in oocytes.

Purpose of Study

To record the activity of native brain receptors.
To gain insight into the alterations of synaptic communication in disease states.
To enhance understanding of how synaptic receptors are targeted by medical therapies.

Methods Used

Microtransplantation of synaptic membranes into Xenopus laevis oocytes was performed.
Detailed protocols for sample preparation, injection, and recording were followed to ensure accuracy.
Recording of ion currents was conducted using specific software conditions for setting parameters.

Main Results

Consistent and reliable responses were recorded from AMPA and GABA receptors.
The method shows potential for studying the functional dynamics of synaptic receptors in various biological models.
Recording techniques provide insight into receptor behavior linked to neuronal communication.

Conclusions

This study demonstrates a reliable method for analyzing synaptic receptor activity.
Understanding the responses of these receptors can enhance insights into neurodegenerative disorders.
The methodology paves the way for further research on neuronal mechanisms and potential therapeutic targets.

Frequently Asked Questions

What is the advantage of using Xenopus laevis oocytes?

Xenopus laevis oocytes allow for the recording of endogenous receptor activity in a controlled environment, facilitating insights into receptor functionality and interactions.

How is the microtransplantation technique performed?

Synaptic membranes are sonicated and then injected into oocytes through precise techniques to ensure consistent results and minimize cell damage.

What types of measurements are obtained from this method?

The method provides electrophysiological data on receptor responses, allowing researchers to assess synaptic communication and receptor function.

How can the findings be applied to understanding mental disorders?

These findings can enhance knowledge about the synaptic changes associated with mental disorders, potentially informing therapeutic strategies for medical interventions.

Are there any limitations to this study?

Trimming injection needles and accurate sample placement are crucial, and any deviations may affect the success of the technique and data integrity.

What steps are critical to ensure successful recording of ion currents?

Ensuring proper setup of the recording chamber and adjusting the software parameters are vital for obtaining accurate and reliable data on ion currents.

The protocol demonstrates that by performing microtransplantation of synaptic membranes into Xenopus laevis oocytes, it is possible to record consistent and reliable responses of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid and γ-aminobutyric acid receptors.

Neurodegenerative and mental health disorders result from changes in synaptic communication. Multifactorial events change synaptic receptors in ways that we do not completely understand. Microtransplantation of synaptic membranes provides insight into these alterations.

The main advantage of this technique is the possibility to record the activity of native brain receptors working in human brain, and therefore, represent the diseases we are studying. Synaptic receptors are major targets for medicine regulating the electrical activity of the brain, but understanding how these receptors change, better therapies restoring their functionality can be developed. This method has been successfully applied to different species, from insects, fish, mammals, but can also be applied to membrane receptors outside of the brain, for example, muscles and tumors.

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Microtransplantation Synaptic Membranes Synaptic Receptors Neurodegenerative Disorders Mental Health Disorders Brain Communication Injection Technique Sample Preparation Oocyte Injection Nanoinjector Membrane Receptors Therapeutic Development Cellular Expansion Experimental Control