Three-dimensional Imaging of Immunolabeled Astrocytes Using Confocal Microscopy

Take an immunostained mouse brain section with fluorescently labeled astrocytes. The astrocyte's cytoplasm fluoresces red, while the nucleus fluoresces blue.

Place the slide on a confocal microscope's stage under a suitable objective lens.

Using the acquisition software, adjust the focus and select the fluorophores labeling the astrocyte's cytoplasm and the nucleus.

Begin live imaging and optimize imaging parameters to reduce noise in the acquired image.

Under acquisition parameters, select a low-speed scanning mode for capturing a higher-quality two-dimensional image.

Identify the uppermost position of the astrocyte as the starting point for the Z-stack and the lowest position as the endpoint.

Define the number of slices covering the full cell depth.

Merge the slices to generate a three-dimensional image of the astrocyte.

To begin confocal microscopy, place a slide onto the microscope stage and select the 63x objective. After opening the Acquisition software, click on Smart Setup in the Acquisition tab and select the proper fluorophores. Here, DAPI and Alexa Fluor 555 are used.

Next, click on Best signal, followed by Apply. Then click on Set Exposure to allow the computer to determine the