Antihistone antibodies in linear scleroderma variants.

Area of Science:

• Rheumatology
• Dermatology
• Immunology

Background:

• Linear scleroderma presents as two distinct subtypes: frontoparietal en coup de sabre and torso-extremity.
• Antihistone antibodies (AHAs), typically associated with drug-induced lupus, are being investigated for their role in linear scleroderma.

Purpose of the Study:

• To investigate the association between antihistone antibodies (AHAs) and the clinical variants of linear scleroderma.
• To explore potential serological differences between the frontoparietal en coup de sabre and torso-extremity types of linear scleroderma.

Main Methods:

• Retrospective review of patients diagnosed with linear scleroderma.
• Analysis of antihistone antibody (AHA) titers in the identified patient cohort.

Main Results:

• Thirty-five patients with linear scleroderma were analyzed.
• Higher prevalence of positive antihistone antibodies (AHAs) was observed in patients with torso-extremity linear scleroderma (71% in pediatric, 67% in adult) compared to frontoparietal en coup de sabre type (45% in pediatric, 25% in adult).
• Antinuclear antibody (ANA) positivity varied between subtypes and age groups.

Conclusions:

• The distinct clinical variants of linear scleroderma may also exhibit distinct serological profiles.
• Antihistone antibody (AHA) titers could potentially correlate with disease extent and activity in linear scleroderma.