Press ReleaseView printer-friendly version << Back
Novan Announces Promising Clinical Results with SB414
- In the recently completed Phase 1b trial for atopic dermatitis, clinical efficacy measures were highly correlated with critical and disease-relevant biomarker changes suggesting a topical nitric oxide therapeutic has the potential to realize disease modification
- The combination of clinical and biomarker evidence supports progressing nitric oxide-based treatments for multiple inflammatory skin diseases, including, but not limited to, atopic dermatitis, psoriasis and acne rosacea
- These outcomes further reinforce the potential of the properties of the nitric oxide science and underlying
The purpose of the two randomized, double-blind, vehicle-controlled Phase 1b trials was to assess target engagement through a reduction of key inflammatory biomarkers and to evaluate the systemic exposure of SB414. The trials were also designed to measure the safety, tolerability and initial efficacy endpoints of SB414 in patients.
In the Phase 1b trial for mild-to-moderate atopic dermatitis, 48 adults were randomized to receive one of 2% SB414 cream, 6% SB414 cream, or vehicle, twice daily for two weeks. Results of this trial are shown below.
- Biomarkers from the Th2 and Th22 inflammatory pathways known to be highly relevant and indicative of atopic dermatitis, including Interleukin-13, or IL-13, IL-4R, IL-5 and IL-22, were downregulated after two weeks of treatment with SB414 2%, achieving statistically significant 10.5, 2.5, 7.1 and 7.5-fold reductions over vehicle, respectively.
- The changes in Th2 and Th22 biomarkers and clinical efficacy assessed as the percent change in Eczema Area Severity Index (EASI) scores were highly correlated in the SB414 2% group.
- Additionally, the proportion of patients achieving a greater than or equal to 3-point improvement on the pruritus (itch) numeric rating scale (NRS) after two weeks of treatment was 71% for patients treated with SB414 2% compared to 43% for vehicle.
“The biomarker analyses showed a large and significant treatment effect with SB414 2% and the direction of the change in various biomarkers was consistent,” stated
The Phase 1b trial design for atopic dermatitis was purposefully short in duration and small in sample size and, as such, substantive clinical efficacy data was not expected to be generated. However, the Company observed that the mean changes in EASI scores were more favorable for SB414-treated patients than those on vehicle. Directional consistency in the clinical data further reinforces the strong correlation with key biomarker signals.
In the Phase 1b trial for mild-to-moderate chronic plaque psoriasis, 36 adults received SB414 6% cream or vehicle twice daily for four weeks. Analysis of the data revealed that various known biomarkers related to psoriasis were not downregulated after four weeks of treatment with SB414 6%.
Both doses of SB414 were safe as defined by no serious adverse events and SB414 2% was more tolerable with no patients discontinuing treatment in the trial due to application site reactions. SB414 at the 6% dose was not consistently effective in reducing biomarkers across both the atopic dermatitis and psoriasis trials. This lack of consistent biomarker movement could potentially be explained by the increased irritation score experienced by patients treated with SB414 6% in both trials. Additionally, SB414 6% showed detectable systemic exposure in a subset of patients, which cleared in nearly all affected patients within 12 hours.
Given the successful downregulation of key biomarkers, favorable tolerability and lack of systemic exposure with SB414 2%,
“We are pleased with the findings from these two studies and have accomplished our initial goals of understanding the clinical utility and target engagement of SB414 to treat inflammatory skin diseases, as well as translating our mechanistic insights from animal models to the clinic,” said
The data from the atopic dermatitis trial will be submitted for presentation by Drs. Guttman and Maeda-Chubachi at upcoming scientific and medical meetings.
About Atopic Dermatitis
Atopic dermatitis, also known as atopic eczema, is the most common chronic relapsing inflammatory skin disease, affecting nearly 18 million people in
Stabilizing the disease and reducing the number and severity of flares are the primary goals of current treatment. The disease is characterized by intense itching, dry skin with red papules and plaques, “weeping” clear fluid, crust and scaling. Immune cells in the deep layers of skin release inflammatory signals, causing an itchy rash. Scratching leads to defects in the skin barrier function, allowing environmental triggers, such as the bacteria Staphylococcus aureus, to penetrate the skin barrier and further exacerbate the condition, triggering the “itch-scratch” cycle. The density of S. aureus colonization has been correlated with both the severity of atopic dermatitis lesions and the degree of cutaneous inflammation.2
Psoriasis is a chronic inflammatory skin disease that affects approximately 7.5 million people in
There is no cure for psoriasis.5 The healthcare market has seen an increase in the introduction of systemic therapies, including biologics, to treat patients with higher disease burden, but all of the current systemic therapies are indicated only for patients with moderate-to-severe disease. For the approximately 80% of patients with mild-to-moderate psoriasis, prescription treatment options include topical corticosteroids, retinoids and vitamin D3.3,4 None of the currently approved therapies are without side effects, and none are well-suited for chronic use.4,5
1IMS Health Disease Insights. “Atopic Dermatitis – US.”
2Nakatsuji T., et al. J Invest Dermatol. 2016. 136(11):2192-2200.
5 Vaidya T, Feldman SR, Kirk J. Patient-centered approach to biologics in the treatment of psoriasis.
Forward Looking Statements
This press release contains forward-looking statements including, but not limited to, statements related to pharmaceutical development of nitric oxide-releasing product candidates, our intention to advance development of certain product candidates, which is subject to our ability to obtain additional financing or enter into strategic relationships to enable such development, and the future prospects of our business and our product candidates. Forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from our expectations, including, but not limited to: risks and uncertainties in the clinical development process, including, among others, length, expense, ability to enroll patients, reliance on third parties, and that results of earlier research and preclinical or clinical trials may not be predictive of results, conclusions or interpretations of later research activities or additional trials; risks related to the regulatory approval process, which is lengthy, time-consuming and inherently unpredictable; risks related to the manufacture of clinical trial materials and commercial supplies of any potentially approved product candidates, including the manufacture of our NVN1000 active pharmaceutical ingredient in our primary facility; our ability to obtain substantial additional funding for the further advancement and development of our product candidates, including the SB414 anti-inflammatory program; our ability to identify and enter into strategic relationships for the further development and potential commercialization of our product candidates; and other risks and uncertainties described in our annual report filed with the
Director, Investor Relations, Capital Sourcing & Relationships
Director, Corporate Communications and Administration