Efficacy, Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of the Topical Formulation SB011 Applied to Lesional Skin in Patients With Atopic Eczema

Summary

Atopic dermatitis (AD) is a chronic or chronic recurring inflammatory skin disorder. Patients suffer from eczema and often severe pruritus on the affected skin, as well as from frequent complications and secondary infections. Next to a genetically predetermined defect in epidermal barrier function and vegetative dysfunction, AD arises from an upregulation of Th2-modified immune responses inducing increased IgE-antibody production, cytokine secretion and subsequently, local inflammation.

Although standard therapies of AD, modern topical corticosteroids, show a better ratio of therapeutic effects to side effects, they retain a moderate acceptance due to their non-specific action, strict compliance requirements and possible adverse effects. As a newer alternative, calcineurin inhibitors show fewer side effects but raise concerns regarding long term risks including the possibility of skin carcinogenicity. Therefore, medical need remains for novel therapies for this major public health problem, directed in particular at specific early disease-causing mechanisms and/or molecular targets, with an improved efficacy, safety and compliance.

Novel therapeutic strategies for the treatment of chronic inflammatory diseases by targeting early disease-causing mechanisms are a promising approach for the treatment of AD.

The transcription factor GATA-3 represents the key regulatory factor of Th2-driven immune responses. It is indispensable for the differentiation and activation of Th2 cells; it integrates Th2 signals and induces Th2 cytokine expression. The investigational product SB011 contains the DNAzyme hgd40 that targets GATA-3. By cleaving GATA-3 mRNA hgd40 reduces specific cytokine production and thereby reduces key features of allergic airway inflammation.

DNAzymes are completely generated by chemical synthesis and can be produced under Good Manufacturing Practice (GMP) controlled conditions. The DNAzymes are not biological drugs, i.e. they are not generated by use of any living organism including cell culture or bacteria. The molecules are highly water-soluble and will be applied as a water/oil/water (W/O/W) formulation since multiple emulsions have been shown to protect the active ingredient from degradation on the skin and have penetration enhancing properties in comparison to other carrier systems.

This proof-of-concept study will evaluate the efficacy, safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of the topical formulation SB011 containing 2 % hgd40 twice daily (BID) in patients with mild to moderate atopic eczema.

Conditions

• Mild to Moderate Atopic Dermatitis

Interventions

DRUG

SB011, 2 % (Water/Oil/Water) emulsion of hgd40

Treatment will be performed BID on 14 consecutive days and one single last application at the site on Day 15 (29 applications in total). Two preferably disseminated and contralateral, comparable lesional treatment areas of approximately 50 cm2 each and located on arms, legs, chest, stomach or neck will be chosen. All patients will perform treatment with both formulation SB011 containing 2% hgd40 and the active ingredient-free vehicle. Comparison of the IMPs will be performed intraindividually. Approximately 5 mg/cm2 (250 μl) of SB011 (2% hgd40) and the vehicle will be applied to the respective treatment areas. The time between the two applications should include min. 8 hours and max. 16 hours. Patients compliance will be controlled by weighing of the IMPs at each visit. On day 1 the application of the IMPs will be demonstrated to the patients at the clinical site. The first treatment as well as the morning treatment on Days 3, 5, 8, 12, and 15 will be carried out at the clinical site

DRUG

Multiple W/O/W formulation, active ingredient-free vehicle

Treatment will be performed BID on 14 consecutive days and one single last application at the site on Day 15 (29 applications in total). Two preferably disseminated and contralateral, comparable lesional treatment areas of approximately 50 cm2 each and located on arms, legs, chest, stomach or neck will be chosen. All patients will perform treatment with both formulation SB011 containing 2% hgd40 and the active ingredient-free vehicle. Comparison of the IMPs will be performed intraindividually. Approximately 5 mg/cm2 (250 μl) of SB011 (2% hgd40) and the vehicle will be applied to the respective treatment areas. The time between the two applications should include min. 8 hours and max. 16 hours. Patients compliance will be controlled by weighing of the IMPs at each visit. On day 1 the application of the IMPs will be demonstrated to the patients at the clinical site. The first treatment as well as the morning treatment on Days 3, 5, 8, 12, and 15 will be carried out at the clinical site

Sponsors & Collaborators

• Sterna Biologicals GmbH & Co. KG

  lead INDUSTRY

Principal Investigators

• Thomas Werfel, Prof. Dr. · Division for Immunodermatology and Allergy Research Clinic for Dermatology, Allergy and Venereology Hannover Medical School

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

69 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2014-02-28

Primary Completion

2016-11-30

Completion

2017-01-31

Countries

• Germany

Study Locations