Pathogenesis of psoriatic arthritis

Area of Science:

• Rheumatology and Immunology

Background:

• Psoriatic arthritis (PsA) is a heterogeneous systemic inflammatory disorder impacting peripheral joints, skin (psoriasis), entheseal sites, digits (dactylitis), and the axial skeleton.
• Significant progress has been made in understanding PsA pathogenesis and treatment over the last decade.

Purpose of the Study:

• To review current knowledge on PsA pathogenesis.
• To explore how genetic predisposition and mechanical stress contribute to PsA development.
• To discuss factors influencing PsA in psoriasis patients and the role of phenotyping in precision medicine.

Main Methods:

• Literature review of current research on PsA pathogenesis.
• Analysis of genetic and mechanical factors in PsA development.
• Examination of phenotypic variations and their implications for treatment.

Main Results:

• Genetic predisposition and mechanical stress are key influencers in developing pathognomonic PsA features like enthesitis and osteoproliferation.
• PsA can involve concomitant osteoporosis and erosive disease.
• Understanding PsA phenotypes is crucial for advancing precision medicine.

Conclusions:

• Current understanding of PsA pathogenesis highlights the interplay of genetics and biomechanics.
• Identifying distinct PsA phenotypes is essential for achieving personalized treatment strategies.
• Precision medicine remains a critical unmet need in managing PsA.