Topical NanoDox® for Atopic Dermatitis

University of Florida

Status and phase: Completed; Phase 2

Conditions: Dermatitis, Atopic

Treatments: Drug: Nanodox 1% (doxycycline monohydrate hydrogel)

Study type: Interventional

Funder types: Other

Identifiers

NCT02910011

IRB201601657 - A

Details and patient eligibility

About

This study will investigate the safety and clinical efficacy of a novel doxycycline topical formulation in subjects with Atopic Dermatitis (AD). The investigators hypothesize that daily application of the study drug in AD subjects will reduce severity of the disease, by reducing skin driven inflammation and restoring skin barrier function. The investigators will also monitor the anti-microbial activity of this product on AD skin, as colonization with Staph aureus is typically associated with disease severity.

Full description

Atopic Dermatitis (AD) is the most common inflammatory skin disease, affecting about 17% of children and 6% adults in the USA , . AD is characterized by skin barrier disruption, an aberrant adaptive immune response (i.e., Th2 polarized) to environmental allergens, susceptibility to cutaneous bacterial infections and intractable itch , . The intense pruritus and cutaneous infections contribute to the morbidity of AD and are major drivers of the reduced quality-of-life associated with this disease , . In the World Health Organization 2010 Global Burden of Disease survey, AD has ranked first among common skin diseases . So far, AD treatments have targeted inflammation with the widespread use of topical and more intermittent use of systemic corticosteroids. In summary, despite its high prevalence, effects on quality-of-life and economic burden - there are few effective treatments for AD.

Doxycycline are tetracycline antibiotics broadly used systemically to treat inflammatory-dermatologic conditions. Several studies in human and animal models have shown doxycycline have anti-inflammatory and pro-healing properties, mainly by blocking tissue proteolytic activity. Doxycycline have been reported to nonselectively inhibit members of the metalloproteinases (MMP) superfamily [reviewed in , ]. In addition to this direct inhibitory activity, doxycycline indirectly prevents tryptic kallikreins activation by MMPs . Growing body of evidence suggests that the tetracycline might also directly downregulate Protease Activator receptor (PAR)-2 expression and function, which was also found to play a role in induction of local inflammatory mediators . Importantly, the doxycycline antimicrobial activity could lead to reduced Staphylococcus infection/colonization in AD skin, a known trigger of AD flares

Enrollment: 23 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Male or female, 18 through 65 years of age, inclusive who are generally healthy except for active atopic dermatitis diagnosed by the following criteria.

• Active Atopic Dermatitis: Subjects must have within the last 3 months according to medical records, patient account or by medical exam of the investigator:

  • Pruritus
  • Eczema (acute, subacute, chronic)
  • Chronic or relapsing history

Most subjects will have (seen in most cases, adding support to the diagnosis):

• Early age at onset
• Atopy
• Personal and/or family history
• Xerosis

Subjects may have (these clinical associations help to suggest the diagnosis of AD but are too nonspecific for defining or detecting AD for research or epidemiological studies):

1. Atypical vascular responses (e.g., facial pallor, white dermographism, delayed blanch response)

2. Keratosis pilaris/hyperlinear palms/ichthyosis

3. Ocular/periorbital changes

4. Other regional findings (e.g., perioral changes/periauricular lesions)

5. Perifollicular accentuation/lichenification/prurigo lesions

   • Moderate to Severe AD: clinical score based on Eczema Area and Severity Score (EASI) ≥ 10
   • If receiving antihistamines, are on a stabilized dose, and expect to maintain this dose throughout the study
   • All female subjects of childbearing potential must have a negative pregnancy test at screening visit and must be on an acceptable methods of contraception from the Screening Visit continuously until 30 days after stopping study drug.

Exclusion criteria

• As determined by the study doctor, a medical history that may interfere with study objectives (cancer, chronic illness)
• Known allergy to tetracycline
• Subjects with a systemic infection requiring a course of systemic antibiotics or antivirals within the last 2 weeks
• Unstable AD or any consistent requirement for systemic immune-modulant Rx (e.g. systemic steroids, phototherapy, Cyclosporine)
• History of use of biologic therapy (including intravenous immunoglobulin)
• Recent or anticipated concomitant use of systemic therapies that might alter the course of AD
• Recent or current participation in another research study
• Females who are breastfeeding, pregnant, or with plans to get pregnant during the participation in the study
• Subjects with a history of keloid formation
• History of lidocaine, epinephrine or Novocain allergy
• History of allergy to tape or other adhesive materials
• Hand eczema only (no body involvement).

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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23 participants in 1 patient group

Topical Administration of Study Drug

Experimental group

Description:

2.5 grams of Nanodox 1% (doxycycline monohydrate hydrogel) will be applied topically to an indicated lesion daily for 28 days

Treatment:

Drug: Nanodox 1% (doxycycline monohydrate hydrogel)