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Published on: August 8, 2025
3D visualization of epidermal Langerhans cells
Akiharu Kubo1, Keisuke Nagao, Masayuki Amagai
1Department of Dermatology, Keio University, Tokyo, Japan. Akiharu@a5.keio.jp
Insights
Langerhans cells (LCs) dynamically interact with epidermal tight junctions (TJs). This study presents a 3D visualization method to observe LCs docking with or penetrating TJs for environmental surveying.
Area of Science:
- Immunology
- Cell Biology
- Dermatology
Background:
- Langerhans cells (LCs) are key immune cells within the epidermis.
- The epidermis possesses two primary diffusion barriers: the stratum corneum and tight junctions (TJs).
- Resting LCs reside beneath these barriers, but can interact with them upon activation.
Purpose of the Study:
- To develop and present a novel method for visualizing the dynamic 3D interaction between LCs and TJs.
- To elucidate how LCs engage with epidermal diffusion barriers.
Main Methods:
- Utilized mouse ear epidermal sheets for analysis.
- Developed a 3D visualization technique to observe LC-TJ interactions.
Main Results:
- Demonstrated a method to visualize the dynamic interplay between LCs and TJs in 3D.
- Showcased how activated LCs extend dendrites to interact with TJs.
Conclusions:
- The developed method allows for detailed observation of LC behavior at the epidermal barrier.
- Understanding LC-TJ interactions is crucial for comprehending immune surveillance in the skin.
Abstract:
Langerhans cells (LCs) are intraepidermal dendritic cells that extend their dendrites between keratinocytes to form a dense network that covers the entire body. The mammalian epidermis has two diffusion barriers, the stratum corneum and tight junctions (TJs). In their resting state, LCs sit underneath these two barriers. Once activated, LCs elongate their dendrites to dock with, or penetrate through, TJs, which allows them to survey the environment between the two barriers. Here, we describe a method to visualize this dynamic interaction of TJs and LCs in 3D by using mouse ear epidermal sheets.
