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Oral vitamin D versus acitretin in congenital non-syndromic ichthyosis: double blinded, randomized controlled trial
Shirin Bakshi1, Rahul Mahajan1, Adil Karim2
1Department of Dermatology, Venereology, and Leprology, Postgraduate Institute of Medical Education and Research, Sector 12, Chandigarh, India.
Background:
Vitamin D has emerged as a promising treatment for congenital ichthyosis for which no comparative studies exist.
Methodology:
In this randomized, double-blinded study, patients with congenital ichthyosis received either Vitamin D 2000 IU/day (group A) or acitretin 0.5 mg/kg/day (group B) for 24 weeks. The primary outcome was improvement in the Visual Index for Ichthyosis Severity (VIIS) and Ichthyosis Area Severity Index (IASI). Secondary outcomes included Ichthyosis Quality of Life Index-32 (IQoL-32), mRNA expression of RORγt and IL-17 and adverse events.
Results:
Twenty-four patients completed the study. Group A (n = 11) showed a significant decrease in VIIS (p = 0.023) and IASI (p = 0.026) at 12 but not 24 weeks. Group B (n = 13) showed a significant decrease in IASI at 24 weeks only (p = 0.016). The IQoL-32 improved over 24 weeks in both groups. A significant decrease in the mRNA expression of RORγt (p = 0.048) and IL-17 (p = 0.023) was seen only in group A. There was no significant difference between the two treatment arms in terms of VIIS, IASI and IQol-32 at 12 and 24 weeks. No serious adverse events were observed.
Conclusion:
Vitamin D maybe an alternative to acitretin in the treatment of congenital ichthyosis where it reduces the expression of RORγt and IL-17.
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