Evaluation of Synaptic Multiplicity Using Whole-cell Patch-clamp Electrophysiology

Julia  K. Sunstrum; Wataru Inoue

doi:10.3791/59461

전기 생리학 전체 셀 패치 클램프를 사용 하 여 시 냅 스 다양성의 평가

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Neuroscience

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JoVE Journal Neuroscience

Evaluation of Synaptic Multiplicity Using Whole-cell Patch-clamp Electrophysiology

전기 생리학 전체 셀 패치 클램프를 사용 하 여 시 냅 스 다양성의 평가

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10:52 min

April 23, 2019

DOI: 10.3791/59461-v

Julia K. Sunstrum¹, Wataru Inoue^1,2,3

¹Neuroscience Program, Schulich School of Medicine and Dentistry,University of Western Ontario, ²Robarts Research Institute, Schulich School of Medicine and Dentistry,University of Western Ontario, ³Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry,University of Western Ontario

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Overview

This study presents a protocol for evaluating functional synaptic multiplicity in neurons using whole-cell patch clamp electrophysiology on acute brain slices. The approach allows researchers to estimate synaptic multiplicity across various species and brain areas, emphasizing the importance of obtaining high-quality recordings.

Key Study Components

Area of Science

Neuroscience
Electrophysiology
Synaptic mechanisms

Background

Understanding synaptic multiplicity is essential for deciphering neuronal communication.
Previous experiments have highlighted the complexity of studying synaptic contacts.
A reliable method is needed for gross estimation of synaptic multiplicity in various models.
This protocol utilizes whole-cell patch clamp techniques to provide insight into synaptic dynamics.

Purpose of Study

To develop a straightforward protocol for estimating synaptic multiplicity.
To facilitate the understanding of neurotransmitter release mechanisms.
To provide a method adaptable to different brain areas and species.

Methods Used

Whole-cell patch clamp electrophysiology on acute brain slices.
The model includes neuronal pairs across various brain regions.
Experiments include blocking action potentials and calcium-dependent vesicular release to assess multiplicity.
Critical procedures include maintaining stable access resistance and temperature controls during recordings.
Data analysis involves statistical comparisons of excitatory postsynaptic currents (EPSCs) under varying conditions.

Main Results

Identified methods to estimate synaptic multiplicity through changes in EPSC amplitude.
Demonstrated that interference with vesicular release alters postsynaptic current responses, confirming synaptic multiplicity.
Addressed multivesicular release implications for synaptic effectiveness and neurotransmitter concentration.
Validated the protocol across different experimental conditions, providing robust data on synaptic dynamics.

Conclusions

The study establishes a reliable protocol for assessing synaptic multiplicity in neuron pairs.
Findings enhance the understanding of synaptic transmission and its underlying mechanisms.
This method can be utilized in various neurobiological contexts to study synaptic behavior and plasticity.

Frequently Asked Questions

What are the advantages of using whole-cell patch clamp electrophysiology?

Whole-cell patch clamp provides detailed insights into neuronal excitability and synaptic responses, allowing for high-resolution data collection.

How is synaptic multiplicity assessed in this study?

Synaptic multiplicity is estimated by analyzing changes in the amplitude of spontaneous EPSCs in response to pharmacological interventions.

What types of data outcomes does the method yield?

The method yields electrophysiological data, specifically measurements of excitatory postsynaptic currents and their amplitudes under various conditions.

Can the protocol be adapted for different species?

Yes, the protocol is designed for versatility and can be applied to various species and brain regions for investigating synaptic dynamics.

What are some limitations to consider when using this method?

Challenges may arise in achieving stable access resistance and ensuring the quality of cell recordings, which are critical for accurate data interpretation.

How does the study contribute to understanding synaptic mechanisms?

By establishing a protocol to investigate synaptic multiplicity, the study advances knowledge on synaptic transmission and neuronal communication.

여기, 선물이 급성 뇌 조각에 전체 셀 패치 클램프 전기 생리학을 사용 하 여 기능 시 냅 스 다양성을 평가 하기 위한 프로토콜.

두뇌에서, 신경 쌍의 쌍은 수시로 시냅스 복합성에게 불린 다중 시냅스 접촉을 형성합니다. 그러나 시냅스 복합성에 대한 정확한 검사는 기술적으로 도전적인 실험이 필요합니다. 이 프로토콜은 전세포 패치 클램프 전기 생리학을 사용하여 시냅스 복합성의 총 추정을 위한 간단한 방법을 설명합니다.

이 방법은 시냅스 복합성을 조사하기 위해 모든 종과 뇌 영역에 적용 될 수있다. 이 방법은 전세포 패치 클램프 전기 생리학에서 기본적인 기술이 필요합니다. 낮은 안정적인 액세스 저항으로 고품질 레코딩을 얻는 것은 데이터의 정확한 해석에 매우 중요합니다.

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