Blood Beta-Defensin-2 Levels Elevated in Psoriasis and Psoriatic Arthritis: A New Biomarker? | Research

The takeaway

Serum human beta-defensin-2 (HBD-2) levels were significantly elevated in psoriasis and psoriatic arthritis patients, potentially serving as a biomarker for disease activity and systemic inflammation.

AMP as disease monitor
The antimicrobial peptide HBD-2 is elevated in psoriasis patients' blood, potentially serving as a simple biomarker for disease activity monitoring

What the researchers found

Serum HBD-2 significantly elevated in psoriasis and psoriatic arthritis vs controls, potentially serving as a biomarker for disease activity and systemic inflammation in autoimmune skin disease.

Why it matters

Psoriasis and PsA need better biomarkers for disease monitoring. A blood-based AMP measurement could be simple and accessible.

How the study worked

Case-control study measuring serum HBD-2 in psoriasis, psoriatic arthritis, and healthy control subjects.

What this study cannot tell us

Cross-sectional. Cannot determine causation. HBD-2 levels influenced by many factors.

How to read the evidence

Case-control biomarker study.

When this study was published

Published in 2025.

The bigger picture

Antimicrobial peptides are emerging as systemic biomarkers for autoimmune diseases, expanding their role beyond local antimicrobial defense.

Questions still open

Does HBD-2 level predict treatment response in psoriasis?
Could HBD-2 be a therapeutic target as well as a biomarker?
How specific is HBD-2 elevation for psoriatic disease vs other inflammatory conditions?

Common questions

Can a blood test track psoriasis activity?

HBD-2, an antimicrobial peptide, is elevated in the blood of psoriasis patients. It could become a simple blood test for monitoring how active the disease is.

What does high HBD-2 mean?

Elevated HBD-2 indicates increased skin inflammation. In psoriasis and psoriatic arthritis, high blood levels suggest more active disease.

Read the original research

Investigating the role of serum human beta defensin-2 in psoriasis and psoriatic arthritis: a case-control study on hBD-2 and CRP, ESR.

Cutaneous and ocular toxicology, 1-7

View on PubMed ↗Publisher’s paper ↗

Citation

Kaya, Necip Enis; Kurmuş, Gökçe Işıl; Özdemirel, Ali Erhan; Altunay, Enes; Gönül, Müzeyyen. (2026). Investigating the role of serum human beta defensin-2 in psoriasis and psoriatic arthritis: a case-control study on hBD-2 and CRP, ESR.. Cutaneous and ocular toxicology, 1-7. https://doi.org/10.1080/15569527.2026.2630770