Related Experiment Video
Updated: Jan 10, 2026
03:22
Extraction of Saliva, Haemolymph, Salivary Glands, and Midgut from Individual Ticks (Acari: Ixodidae)
Published on: October 31, 2025
563
Human epidermal Langerhans cells induce tolerance and hamper T cell function upon tick-borne pathogen transmission
Johanna Strobl1,2, Lisa Kleissl3,4, Julia Eder3,4
1Department of Dermatology, Medical University of Vienna, Vienna, Austria. johanna.strobl@meduniwien.ac.at.
Nature Communications
|November 28, 2025
Summary
Tick bites reprogram skin immune cells, Langerhans cells, to dampen immune responses. This immune evasion helps ticks and Borrelia burgdorferi transmit effectively, impacting infectious disease spread.
Area of Science:
- Immunology
- Infectious Diseases
- Dermatology
Background:
- Arthropods, like ticks, transmit infectious diseases by altering skin immunity.
- Langerhans cells in the epidermis are key sentinels against ectoparasitic arthropods.
Purpose of the Study:
- Investigate human Langerhans cell responses to tick bites and Borrelia burgdorferi infection.
- Understand how tick saliva affects Langerhans cell function and immune signaling.
Main Methods:
- Imaging techniques
- Cell migration assays
- Immune spheroid models
- Single-cell transcriptomic analysis of patient samples
Main Results:
- Tick bites and saliva reprogram Langerhans cells.
- Langerhans cells increase migration to lymphatic tissues.
- Cells adopt a tolerogenic state, reducing pro-inflammatory helper T cell induction.
- Enhanced promotion of type 2 and regulatory T cell responses observed.
Conclusions:
- Tick bites reprogram Langerhans cells to dampen protective immunity.
- This immune modulation facilitates tick and pathogen evasion of host defenses.
- Findings explain efficient transmission of tick-borne diseases like Lyme disease.
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