To elucidate immune mechanisms underlying acquired idiopathic generalized anhidrosis (AIGA) and identify potential biomarkers for diagnosis and treatment response, emphasizing the significance of these biomarkers.
Key Findings:
Inflammatory cell infiltration around sweat ducts was predominantly composed of CD4+ T cells.
Serum levels of CCL22 and IFN-γ were significantly elevated in AIGA patients compared to healthy controls.
CD68+ macrophages were identified as the main source of CCL22 in periductal regions.
Serum levels of Macrophage migration inhibitory factor (MIF) were higher in steroid-resistant cases, indicating a potential link to treatment response.
Interpretation:
AIGA involves a macrophage–CCL22–Th1–IFN-γ inflammatory axis, indicating a collapse of sweat duct immune privilege, which may inform future treatment strategies.
Limitations:
Small sample size of 14 patients may limit generalizability.
Lack of long-term follow-up data on treatment outcomes may introduce biases in patient selection.
Conclusion:
Serum MIF may serve as a potential biomarker for predicting steroid responsiveness in AIGA, suggesting avenues for future research.
