Sympathetic skin response in psoriasis and vitiligo

Area of Science:

• Autonomic Nervous System Function
• Dermatology
• Neuroimmunology

Background:

• The sympathetic skin response (SSR) assesses peripheral autonomic nerve function, specifically sudomotor activity via unmyelinated sympathetic fibers.
• While studied in neurological and some dermatological conditions, data on SSR in immunologically mediated skin disorders is limited.
• Vitiligo and psoriasis are common inflammatory skin conditions with potential links to nervous system involvement.

Purpose of the Study:

• To investigate the impact of vitiligo and psoriasis on sympathetic skin response (SSR).
• To determine if these immunologically mediated skin disorders affect autonomic sudomotor function.
• To compare SSR parameters between patients with vitiligo, psoriasis, and healthy controls.

Main Methods:

• SSR was measured in 30 psoriasis patients, 15 vitiligo patients, and 23 healthy controls.
• Stimulation of median nerves and simultaneous recording of palm responses were performed.
• Key SSR parameters including latency, amplitude, and negative component area were analyzed.

Main Results:

• SSR was successfully elicited in all participants across the study groups.
• No statistically significant differences were observed in SSR latency, amplitude, or area between patients and controls.
• These findings suggest that vitiligo and psoriasis do not significantly alter SSR.

Conclusions:

• Vitiligo and psoriasis do not appear to have a significant effect on sympathetic skin response.
• Autonomic sudomotor function, as assessed by SSR, remains largely unaffected in individuals with these skin conditions.
• Further research may explore other aspects of autonomic function in these patient populations.