Isolation of Hypothalamic Microglia from Freshly Perfused Adult Mouse Brain by Magnetic-Activated Cell Sorting

Evangelia Kyriakidou; Giulia Cutugno; Camille Allard; Agnes Nadjar

doi:10.3791/66769

Isolation of Hypothalamic Microglia from Freshly Perfused Adult Mouse Brain by Magnetic-Activated...

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Neuroscience

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JoVE Journal Neuroscience

Isolation of Hypothalamic Microglia from Freshly Perfused Adult Mouse Brain by Magnetic-Activated Cell Sorting

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05:53 min

September 6, 2024

DOI: 10.3791/66769-v

Evangelia Kyriakidou*¹, Giulia Cutugno*¹, Camille Allard¹, Agnes Nadjar¹

¹University of Bordeaux, INSERM, Neurocentre Magendie

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Overview

This study details a protocol for isolating microglial cells from the mouse hypothalamus using magnetically activated cell sorting (MACS). This method ensures a high yield and purity of microglia, enabling researchers to investigate the interaction between microglia and neurons and how nutrition impacts brain function.

Key Study Components

Area of Science

Neuroscience
Cell biology
Microglial research

Background

The hypothalamus plays a crucial role in feeding behavior and energy balance.
Isolating microglia from small brain structures is generally challenging.
Research explores the role of microglia in metabolic conditions influenced by diet.
Understanding the balance between microglial and neuronal interactions is essential.

Purpose of Study

To develop a reliable method for isolating microglial cells for ex vivo analysis.
To study the effects of nutrition on microglial function and metabolism.
To explore the communication between microglia and neurons in relation to metabolic diversity.

Methods Used

Magnetically activated cell sorting (MACS) for isolating microglia.
Focus on the hypothalamus as the biological model.
The protocol allows for viable cells to be plated for in vitro assays.
Protocol designed to achieve high purity and yield in a short time.
Combined approaches involving histological and metabolic observations.

Main Results

The isolation protocol yields cells with high purity and viability.
Microglia are implicated in metabolic diversity and responses to nutrition.
Potential insights into microglia-neuron communication affecting metabolic conditions.
Study highlights the complexity of individual responses to diet.

Conclusions

This protocol facilitates the study of microglial roles in brain metabolism.
It enhances understanding of microglial functions in response to dietary influences.
Findings could provide insights into neuronal health and metabolic disorders.

Frequently Asked Questions

What are the advantages of using MACS for isolating microglia?

MACS allows for high yield and purity of microglia, which is essential for accurate ex vivo analyses and experiments.

How does the protocol ensure viability of isolated cells?

The methodology emphasizes rapid isolation and optimal conditions to maintain the integrity and functionality of cells.

What types of experiments can be performed with the isolated microglia?

Isolated microglia can be used for various in vitro assays to study their metabolic function and interaction with neurons.

Why is the hypothalamus a focus for this research?

The hypothalamus is crucial for regulating feeding behavior and energy balance, making it a key area for understanding metabolic processes.

What implications does this research have for nutritional studies?

It provides insights into how microglial function might vary with diet, potentially informing targeted nutritional interventions for metabolic disorders.

Are there any limitations to this protocol?

While effective, the protocol's efficiency may vary depending on the size of the brain structure and specific experimental conditions.

우리는 상대적으로 짧은 시간에 MACS(magnetically activated cell sorting)를 사용하여 쥐의 시상하부(또는 이에 상응하는 작은 뇌 구조)에서 미세아교세포를 분리하는 프로토콜을 설명합니다. MACS 분류된 시상하부 미세아교세포는 체외 분석에 사용할 수 있으며 in vitro 분석을 수행하기 위해 도금할 수 있습니다.

우리의 목표는 미세아교세포와 뉴런 사이의 상호 작용에 중점을 두고 영양이 뇌 기능에 어떤 영향을 미치는지 탐구하는 것입니다. 그리고 우리는 특히 시상하부에 초점을 맞추는데, 시상하부는 섭식 행동과 에너지 균형을 조절하는 핵심 구조입니다. 대부분의 연구는 미세아교세포(microglial process)를 특이적으로 표적으로 삼기 위해 유전자 마우스를 활용한 다음 이 접근법을 조직학적 또는 대사학적 관찰에 결합하지만, 전체 구조적 수준에서, 그러나 여전히 세포 수준 해상도를 달성해야 합니다.

작은 뇌 구조에서 미세아교세포를 분리하는 것은 매우 어려운 일이며, 당사의 프로토콜은 귀중한 세포의 높은 수율과 순도를 보장하여 미세아교세포의 신진대사 및 기능에 대한 식단의 영향을 연구할 수 있습니다. 당사의 프로토콜을 사용하면 짧은 기간에 상대적으로 높은 순도와 수율을 달성할 수 있으며, 시상하부와 같은 작은 구조에서도 많은 생존 가능한 세포를 얻을 수 있습니다. 우리의 연구는 대사 상태를 발달시키기 위한 회복력 또는 취약성에서 미세아교세포 뉴런 통신의 역할을 탐구하며, 개인이 식단에 반응하는 방식이 매우 다양하다는 것을 알고 있습니다.

그리고 우리의 데이터는 미세아교세포가 이러한 다양성에 중요한 역할을 할 수 있음을 시사합니다.

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