Related Experiment Video
Updated: May 28, 2026
07:27
Two-photon Imaging of Microglial Processes' Attraction Toward ATP or Serotonin in Acute Brain Slices
Published on: January 31, 2019
Live-Cell Imaging of Microglia in Organotypic Brain Slices Using Microcontact Printing
Björn Y P Richardsen1, Christian Humpel1
1Laboratory of Psychiatry and Experimental Alzheimer's Research, Department of Psychiatry and Psychotherapy, Medical University of Innsbruck, Anichstr. 35, A-6020 Innsbruck, Austria.
Biomolecules
|May 27, 2026
Summary
Researchers visualize microglia, the brain's immune cells, in mouse brain slices for up to 20 days. This live-cell imaging technique tracks microglia's response to stimuli, aiding Alzheimer's disease research.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are crucial brain immune cells involved in clearing debris and beta-amyloid plaques, particularly relevant in Alzheimer's disease.
- Microglia exhibit dynamic morphological changes, transitioning from amoeboid to ramified forms or macrophages, which can be studied in organotypic brain slice models.
- Previous work established live-cell imaging of astrocytes and vessels in these slices, setting the stage for microglia visualization.
Purpose of the Study:
- To develop and validate a method for live-cell imaging of microglia in organotypic mouse brain slices.
- To utilize microcontact printing for antibody labeling of microglia (Iba1 and CD11b) for enhanced visualization.
- To observe microglia's dynamic behavior and responses to specific stimuli in a controlled ex vivo environment.
Main Methods:
- Organotypic mouse brain slices were prepared for microscopy.
- Microcontact printing was employed to apply Iba1 and CD11b antibodies for microglia labeling.
- Live-cell fluorescence microscopy was used to track labeled microglia over time (up to 20 days).
- Microglia responses to lipopolysaccharide (LPS), granulocyte-macrophage colony-stimulating factor (GM-CSF), and interleukin-10 (IL-10) were assessed.
Main Results:
- Microglia were successfully labeled with antibodies and visualized using live-cell fluorescence microscopy for an extended period of 20 days.
- Stimulation with LPS or GM-CSF induced migration of round amoeboid microglia.
- Interleukin-10 treatment promoted the differentiation of microglia into ramified forms.
- This study presents the first instance of live-cell imaging for microglia in organotypic brain slices using microcontact printing.
Conclusions:
- A robust method for live-cell imaging of microglia in organotypic brain slices has been established.
- Microcontact printing facilitates efficient antibody labeling and tracking of microglia.
- The technique allows for the observation of microglia's dynamic morphological and migratory responses to various stimuli, providing insights into their role in neurological conditions like Alzheimer's disease.
