Aldeyra Therapeutics Announces Positive Results from a Randomized, Double-Blind, Vehicle-Controlled Clinical Trial of Topical Dermatologic NS2 in Patients With Sjögren-Larsson Syndrome
"The results of this randomized and controlled clinical trial represent a significant advance in the effort to develop a treatment for SLS," said Dr.
Patients with SLS, a rare inborn error of aldehyde metabolism, suffer from ichthyosis, a debilitating dermatologic disease characterized by dry, thickened, scaly skin. The symptoms of SLS are thought to be related to high levels of toxic fatty aldehydes due to genetic mutations in fatty aldehyde dehydrogenase, an enzyme critical for the normal function of skin and other organs. NS2 is specifically designed to reduce levels of toxic aldehydes, and is the first therapy to be directed at the putative cause of SLS.
Twelve subjects with SLS and moderate to severe ichthyosis were randomized equally to receive NS2 1.0% dermatologic formulation or vehicle formulation administered once-daily (QD) on a 4 x 10 inch area of skin for two months. Investigators and subjects were blinded to treatment group. Ichthyosis was graded by a blinded central review of digital photographs, as well as by clinical exam, using the Ichthyosis Severity Score, which is comprised of assessments of global impression, scaling, erythema (redness), lichenification (thickness) and excoriation (abrasion). In addition, dermal tissue from subjects was analyzed for biomarkers relevant to fatty aldehyde dehydrogenase deficiency.
NS2 consistently produced clinically meaningful effects in reducing the severity of ichthyosis. As assessed by central review, five of six subjects (83%) treated with NS2 achieved a rating of "almost clear" or "mild" on global assessment. Six of six (100%) subjects treated with NS2 improved over the course of therapy as assessed by central review, and the improvement was greater than that observed with vehicle-treated patients (p < 0.05). For NS2-treated subjects, mean reductions in ichthyosis severity were greater after 8 weeks of therapy than after 4 weeks of therapy, suggesting a disease modifying effect of NS2. Consistent with the clinical activity of NS2, significant dermal biomarker changes were noted in NS2-treated patients but not vehicle-treated patients (p < 0.004). Cholesterol, which is significantly elevated in the skin of SLS patients, was reduced in NS2-treated patients more than in vehicle-treated patients (p < 0.001). NS2 was observed to be generally well tolerated and there were no significant adverse events, serious adverse events or discontinuations in the trial.
"We are thrilled to report positive data from this rigorous and controlled clinical trial studying the use of topical dermatologic NS2 to treat the severe skin disease associated with SLS," said
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About Sjögren-Larsson Syndrome
Sjögren-Larsson Syndrome is a rare inborn error of aldehyde metabolism caused by mutations in fatty acid aldehyde dehydrogenase, leading to elevated toxic fatty aldehyde levels that are thought to contribute to ichthyosis (scaly, thickened, dry skin), neurological disorders, and retinal disease. There is no therapy for SLS that has been approved by the
NS2 is an aldehyde-binding small molecule based on an innovative platform technology focused on trapping aldehydes, which are toxic and pro-inflammatory mediators of numerous diseases. By decreasing aldehyde load, NS2 may mitigate excessive inflammation and address diseases where aldehyde metabolism is impaired, including certain inborn errors of metabolism.
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