Circulating T-helper 17 cells and associated cytokines in psoriasis

Area of Science:

• Immunology
• Dermatology
• Autoimmune Diseases

Background:

• T helper 17 (Th17) cells, a subset of CD4 T cells producing IL-17, are implicated in inflammatory and autoimmune conditions.
• Psoriasis is a chronic inflammatory skin disease with complex immunological underpinnings.

Purpose of the Study:

• To investigate the frequency of Th17 cells and associated cytokines (IL-17A, IL-23) in the peripheral blood of psoriasis patients.
• To evaluate the relationship between Th17 cell levels, cytokine concentrations, and psoriasis disease severity.

Main Methods:

• A prospective study involving 34 psoriasis patients and 24 healthy controls.
• Quantification of circulating Th1 and Th17 cells using flow cytometry.
• Measurement of serum IL-17A and IL-23 levels via ELISA.

Main Results:

• Patients with psoriasis exhibited significantly higher frequencies of CD4+ IL-17A+ T cells in their peripheral blood (P < 0.001).
• While serum concentrations of IL-17A and IL-23 were elevated in psoriasis patients, these differences did not achieve statistical significance.
• No significant correlation was found between the studied Th17 cells or cytokines and the clinical severity of psoriasis.

Conclusions:

• Elevated levels of circulating Th17 cells and related cytokines may contribute to the skin pathology observed in psoriasis.
• These findings support the role of Th17-mediated inflammation in the pathogenesis of psoriasis.