<meta charset="utf8"></head><body>Elucidando el comportamiento de la microglía en el desarrollo del tectum óptico del pez cebra

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<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>1 L Breeding tanks</td>
			<td>Tecniplast</td>
			<td>ZB10BTE</td>
			<td></td>
		</tr>
		<tr>
			<td>1-phenyl-2-thiourea (PTU)</td>
			<td>Sigma-Aldrich</td>
			<td>P7629</td>
			<td>Diluted to 0.2 mM in E3 to prevent embryo pigmentation</td>
		</tr>
		<tr>
			<td>Bottom glass imaging dish</td>
			<td>FluoroDish</td>
			<td>FD3510-100</td>
			<td></td>
		</tr>
		<tr>
			<td>Disposable Graduated transfer pipette</td>
			<td>avantor</td>
			<td>16001-188</td>
			<td></td>
		</tr>
		<tr>
			<td>Dry block heater</td>
			<td>Novolab</td>
			<td>Grant QBD4</td>
			<td>To keep low melting agarose at 37 &#176;C</td>
		</tr>
		<tr>
			<td>Ethyl 3-aminobenzoate methanesulfonate (Tricaine)</td>
			<td>Sigma-Aldrich</td>
			<td>E10521-50G</td>
			<td></td>
		</tr>
		<tr>
			<td>Imaris 10.0</td>
			<td>Oxford Instruments</td>
			<td></td>
			<td>analysis software</td>
		</tr>
		<tr>
			<td>Imaris File Converter</td>
			<td>Oxford Instruments</td>
			<td></td>
			<td>https://imaris.oxinst.com/big-data</td>
		</tr>
		<tr>
			<td>Laser-scanning confocal microscope</td>
			<td>Nikon</td>
			<td>Eclipse Ti2-E</td>
			<td></td>
		</tr>
		<tr>
			<td>Methylene blue</td>
			<td>Sigma-Aldrich</td>
			<td>M9140-25G</td>
			<td></td>
		</tr>
		<tr>
			<td>microloader tips</td>
			<td>Eppendorf</td>
			<td>5242956003</td>
			<td></td>
		</tr>
		<tr>
			<td>NuSieve GTG Agarose</td>
			<td>Lonza</td>
			<td>&#160;50081</td>
			<td></td>
		</tr>
		<tr>
			<td>Petri dishes (90 mm)</td>
			<td>avantor</td>
			<td>391-0559</td>
			<td></td>
		</tr>
		<tr>
			<td>Pronase</td>
			<td>Sigma-Aldrich</td>
			<td>11459643001</td>
			<td></td>
		</tr>
		<tr>
			<td>&#160;Stainless Steel Forceps Dumont No. 5</td>
			<td>FineScienceTools</td>
			<td>11254-20</td>
			<td></td>
		</tr>
		<tr>
			<td>Stereo microscope</td>
			<td>Leica</td>
			<td>Leica M80</td>
			<td>To mount the embryos</td>
		</tr>
		<tr>
			<td>teasing needle</td>
			<td>avantor</td>
			<td>76549-024</td>
			<td></td>
		</tr>
	</tbody>
</table>

live imaging and characterization of microglia dynamics in the zebrafish embryo

As resident macrophages in the central nervous system (CNS), microglia represent a distinct non-neuronal population that accounts for up to 15% of all glial cells in the adult brain. Studying microglia biology has gained increasing attention in recent years due to their established importance in development, physiology, and disease1. Under physiological conditions, microglial cells are highly dynamic, continuously surveying the brain parenchyma2,3. This behavior allows microglia to colonize the brain and play pivotal roles in its development such as shaping neuronal circuitry4, synaptic pruning5, and vasculogenesis6. Furthermore, this inherent dynamic nature allows microglia to constantly monitor the CNS for signs of infection, injury, or any deviations from homeostasis7. To dissect these intricate cell dynamics, live imaging of microglia across space and time is indispensable. Fortunately, the optical transparency of externally developing zebrafish embryos, coupled with the availability of well-characterized transgenic reporter lines that fluorescently label microglia, positions zebrafish as an ideal vertebrate model for such investigations. Live imaging in zebrafish embryos offers a non-invasive approach that does not require surgery or extensive tissue manipulation, minimizing potential perturbations to the CNS status. This is a critical consideration when studying microglial cells, as they are highly sensitive to even subtle changes in the extracellular environment8.
Here, we provide a guideline to successfully track 3D microglial cell movements in the zebrafish embryo, allowing for an unprecedented view of microglia behavior within the intact architecture of the developing brain parenchyma (see Figure 1&#160;for a graphical overview of the protocol). This step-by-step protocol details how to set up and image zebrafish microglia at different developmental stages and how to extract high-resolution data on microglia cell motility to provide valuable insights into their migratory patterns and responses to environmental cues. We also demonstrate this protocol can be adapted to perform live multi-color imaging, thus extending its applicability to studying microglia in combination with transgenic lines that mark neighboring cells, including neurons3, oligodendrocytes9, and endothelial cells10&#160;(as shown in Figure 2). By adding to the toolbox that allows one to directly observe and characterize the dynamics of microglia behavior&#160;in real time and in their natural environment, this protocol will likely contribute to better elucidating microglia functionality during early development, both in physiology and disease.

<meta charset="utf8"></head><body>Autor destacado: Uso del pez cebra para explorar la migración de la microglía durante el desarrollo del cerebro

Imagen en vivo y caracterización de la dinámica de la microglía en el embrión de pez cebra

My research project focuses on characterizing microglia dynamics, morphology, and function during the first week of zebra fish embryonic development. Microglia are highly dynamic cells, and we believe that a deeper characterization of their behavioral patterns and morphological changes could give us an interesting insight into their maturation process and activity in the developing brain. The major challenge in this type of imaging lies in capturing multiple channels with eye quality and an excellent temporary resolution.However, advancement in confocal technology are now enabling us to meet this challenge effectively. We believe our protocol to be a potent tool that could facilitate the characterization of microglia dynamics in diverse settings. This includes not only different stages of development, but also very smooth background where microglia homeostasis is compromised.

Read this Scientific Article Protocol about Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo at JoVE.com

Microglia are highly dynamic cells and their migration and colonization of the brain parenchyma is a crucial step for proper brain development and ...

live-imaging-characterization-microglia-dynamics-zebrafish

Research

JoVE Journal

Immunology and Infection

Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo

615 vistas.  Université Libre de Bruxelles (ULB). Mi proyecto de investigación se centra en caracterizar la dinámica, morfología y función de la microglía durante la primera semana de desarrollo embrionario del pez cebra. Las microglías son células altamente dinámicas, y creemos que una caracterización más profunda de sus patrones de comportamiento y cambios morfológicos podría darnos una visión interesante de su proceso de maduración y actividad en el cerebro en desarrollo. El mayor reto en es...