Preparations and Protocols for Whole Cell Patch Clamp Recording of <em>Xenopus laevis</em> Tectal Neurons

Zhenyu Liu; Katelynne B. Donnelly; Kara G. Pratt

doi:10.3791/57465

準備やアフリカツメガエルの視蓋ニューロンの全体セルパッチ・クランプ記録のためのプロトコル

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Neuroscience

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JoVE Journal Neuroscience

Preparations and Protocols for Whole Cell Patch Clamp Recording of Xenopus laevis Tectal Neurons

準備やアフリカツメガエルの視蓋ニューロンの全体セルパッチ・クランプ記録のためのプロトコル

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05:25 min

March 15, 2018

DOI: 10.3791/57465-v

Zhenyu Liu¹, Katelynne B. Donnelly¹, Kara G. Pratt¹

¹Department of Zoology and Physiology and Program in Neuroscience,University of Wyoming

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Overview

This study explores whole cell patch clamp recording techniques to study the retinotectal circuit in Xenopus laevis tadpoles. By utilizing different brain preparations, the research aims to understand the connectivity patterns of neurons in the tadpole optic tectum during development and the overall function of neural circuits.

Key Study Components

Area of Science

Neuroscience
Electrophysiology
Neural Circuitry

Background

Investigating how neural circuits form and function in developing organisms.
The retinotectal circuit is crucial for visual processing in amphibians.
Xenopus laevis tadpoles serve as a valuable model for studying neural connectivity.
Whole cell recordings provide detailed insights into neuronal activity.

Purpose of Study

To understand the patterns of connectivity among neurons in the optic tectum.
To analyze how neurons change throughout development.
To explore how neural circuits contribute to behavior.

Methods Used

Whole cell patch clamp methods were used for electrophysiological recordings.
The biological model involved dissected tadpole brains to study optic tectum neurons.
No multiomics workflows were mentioned.
Specific steps included immobilizing the tadpole, isolating the brain, and performing targeted recordings.
The methods allow recording within a crucial timeframe of 10 minutes, typically lasting for several hours.

Main Results

The preparations successfully facilitated the recording of neuron activity in the tectum.
Electrophysiological changes indicative of neural connectivity were observed.
The results prompted discussions on the functional implications of the retinotectal circuit.
Findings contribute to understanding developmental neural circuitry.

Conclusions

This research demonstrates effective methods for studying neural connectivity in developing tadpole brains.
The study enhances understanding of neural circuit function during development.
Results have broader implications for examining neurological processes and behaviors in amphibians.

Frequently Asked Questions

What are the advantages of using Xenopus laevis tadpoles for neural studies?

Xenopus laevis tadpoles offer a simplified model for studying neural circuits and are amenable to electrophysiological techniques due to their transparent bodies and accessible brain structures.

How are whole cell recordings performed on tadpole neurons?

Whole cell recordings are performed after isolating the tadpole brain, allowing direct access to tectal neurons via a recording pipette.

What types of outcomes can be obtained from this method?

Electrophysiological data such as action potentials, synaptic responses, and neuronal connectivity can be obtained from the recordings.

How might these techniques be adapted for use in other species?

The dissection and recording techniques could be modified to fit other amphibians or vertebrates with similar brain structures for comparative neuroscience studies.

Are there any limitations to this method?

One limitation is that the preparation requires significant skill and may have variable success rates depending on the operator.

What insights do the findings provide regarding neural circuit function?

The findings highlight the importance of specific connectivity patterns in the retinotectal circuit, elucidating how these connections may evolve during development.

アフリカツメガエル幼生の発達回路を勉強するセル全体パッチ・クランプ記録の 3 脳剤について述べる。それぞれの準備を独自の特定の利点は、神経回路機能を研究するモデルとしてアフリカツメガエルのオタマジャクシの実験的少ないに貢献します。

この手順の全体的な目標は、オタマジャクシ視蓋のニューロンから全細胞電気生理学的記録を取得し、発生中の接続パターンについて学び、最終的には神経回路がどのように形成および機能するかを理解することです。この方法は、ニューロンが発達の過程でどのように変化するのか、回路はどのように機能して行動を引き起こすのかなど、神経発達の分野における重要な質問に答えるのに役立ちます。これらの調製物の主な利点は、視蓋ニューロンの電気生理学的記録を可能にし、発達中の神経回路の機能についての洞察を提供することです。

その手順を実演するのは、私の研究室の大学院生であるZhenyu Luiです。廃棄移送ピペットを使用して、麻酔をかけたオタマジャクシを外部記録溶液を含む解剖記録皿に移します。麻酔をかけたオタマジャクシを、解剖記録皿の床にある水没したシリコンブロックに固定します。

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神経科学問題 133 全細胞パッチクランプ記録電気生理学神経回路機能脳準備発達回路アフリカツメガエルのオタマジャクシ