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A Neuron-Mast Cell Axis Regulates Skin Microcirculation in Diabetes
Xinran Li1, Dan Yuan1, Peng Zhang1,2
1Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
Diabetes
|June 4, 2024
Summary
Diabetic skin microcirculation is impaired by activated sensory neurons that trigger mast cells. Targeting this neuro-immune axis, particularly TRPV1 and Substance P, can improve blood flow in type 2 diabetes.
Area of Science:
- Neuroscience
- Immunology
- Diabetology
Background:
- Microcirculation changes are key in diabetes progression.
- The role of neural activity in diabetic microvascular issues is not fully understood.
Purpose of the Study:
- To investigate the neuro-immune mechanisms behind skin microcirculation impairment in type 2 diabetes.
- To identify potential therapeutic targets for diabetic complications.
Main Methods:
- Laser speckle contrast imaging in type 2 diabetes patients and a murine model.
- Analysis of mast cell degranulation, TRPV1 activity, and Substance P levels.
- Pharmacological and genetic manipulation of TRPV1+ nociceptors and Substance P.
Main Results:
- Type 2 diabetes significantly compromises skin microvascular perfusion.
- Mast cell degranulation, mediated by TRPV1+ sensory neurons, is crucial for this impairment.
- TRPV1+ nociceptor ablation and Substance P modulation improved microcirculation.
Conclusions:
- A novel neuron-mast cell axis contributes to skin microcirculation disturbance in diabetes.
- Targeting TRPV1 and Substance P offers potential neuro-immune therapeutic strategies for diabetes-related complications.
