Effects of Pimecrolimus on Skin Biopsy Ex-plants From Patients With Atopic Dermatitis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00379678
Recruitment Status : Completed
First Posted : September 22, 2006
Last Update Posted : March 29, 2017
Information provided by:
National Jewish Health

Brief Summary:
THe study seeks to determine if pimecrolimus has a positive effect on increasing antimicrobial peptide expression and reducing vaccinia virus growth in the skin explants from patients with atopic dermatitis.

Condition or disease
Atopic Dermatitis

Detailed Description:

AMP play an important role in the innate immune response against infections. Two major classes of AMP have been identified: the beta defensins (HBD) (Harder 1997) and cathelicidins (LL-37) (Gallo 2002). AMP have been shown to have antibacterial activities against S. aureus (Ong 2002) and antiviral activity against vaccinia virus (VV) (Howell 2004).

The skin of AD patients is characterized by a deficiency in AMP, which may account for their propensity to skin infections (Ong 2002). This AMP deficiency is believed to be due to an increase in Th2 cytokines, IL-4 and IL-13, expression (Ong 2002), as well as an increase of IL-10 expression (Howell 2005). Other cytokines known to affect AMP expression are TNF-alpha (TNFa), IL-6, IL-1 and interferon-gamma (IFN-g). These cytokines induce the expression of AMP (Erdag 2002, Liu 2002, Ong 2002, Nomura 2003). However, negligible levels of TNF-a and IFN-g have been shown in AD skin possibly due to their downregulation by Th2 cytokines (Nomura 2003). Therefore, the neutralization of IL-4, IL-13 and IL-10 in AD patients may correct the AMP deficiency of AD patients and decrease their propensity to recurrent skin infections. Interestingly, the addition of anti-IL10 to skin explants from AD patients augmented HBD-2 and LL-37 expression (Howell 2005). In addition, IL-4 and IL-13 were found to enhance VV replication and down-regulate LL-37 in VV-stimulated keratinocytes and neutralization of IL-4/IL-13 in AD skin augmented LL-37 and inhibited VV replication (Howell 2006a). LL-37 and HBD-3 have been found to kill VV(Howell 2004; Howell 2006b). Thus a deficiency of these AMP may contribute to increased propensity to viral infection. Therapeutic strategies are needed to augment AMP expression in AD skin to reduce skin infection.

Pimecrolimus is a calcineurin inhibitor that binds with high affinity to macrophilin-12. The complex pimecrolimus-macrophilin inhibits calcineurin, a phosphatase required for the dephosphorylation of the cytosolic form of the nuclear factor of activated T cells (NF-AT). As a consequence, pimecrolimus prevents the nuclear translocation of NFAT and thereby the transcription and release of both Th1 and Th2 cytokines such as IL-2, IFN-g, IL-4, IL-5, IL-10, TNF-a and GM-CSF (Grassberger 1999).

As the most common topical corticosteroid treatment used by AD patients, triamcinolone diacetate is included in this study as an active comparator.

Study Type : Observational
Actual Enrollment : 28 participants
Time Perspective: Prospective
Official Title: A Pilot Ex-vivo Study to Evaluate the Effect of Pimecrolimus on Antimicrobial Peptide Expression and Vaccinia Virus Growth in Perilesional Skin Cultures of Patients With Atopic Dermatitis
Study Start Date : September 2006
Actual Primary Completion Date : March 2007
Actual Study Completion Date : March 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Eczema

Information not available

Primary Outcome Measures :
  1. Information not available [ Time Frame: Information not available ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Has signed the informed consent form
  • Male or female of any race and ethnicity
  • Patient is 18 years of age or older with active AD
  • Active AD of any severity will be defined according to Hanifin and Rajka clinical criteria (Hanifin, J.M., Rajka, G. 1980)
  • Chronic AD for more than one year duration

Exclusion Criteria:

  • Patients with only AD of the face
  • Women of childbearing potential not using the contraception method(s) specified in this study (abstinence, oral contraceptives, IUD,diaphragm), as well as women who are breastfeeding
  • Patients with severe medical condition(s) that in the view of the investigator prohibits participation in the study
  • Use of any other investigational agent in the last 30 days
  • Patient who is pregnant or lactating
  • Patient using oral corticosteroids, or any systemic immunosuppressive, or immunomodulary medication within the last 28 days
  • Patient who has received immunotherapy within the last year
  • Patient with a history of bleeding disorders
  • Use of aspirin, oral antihistamines, oral antibiotics, oral cyclosporine, or topical medications within seven days of the Screening/Baseline Visit including (but not restricted to), Elidel, Protopic, topical corticosteroids, and topical antibiotics
  • Patients with known lidocaine allergy
  • Inability of patient to follow study procedures or documented history of the patient being noncompliant
  • Any concomitant diagnosis that, in the opinion of the investigator, might impact the biopsy procedure
  • Infected AD
  • Use of any topical medication < 7 days or systemic medication < one month prior to study start

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00379678

United States, Colorado
National Jewish Medical and Research Center
Denver, Colorado, United States, 80206
Sponsors and Collaborators
National Jewish Health
Principal Investigator: Donald Leung, MD,PhD National Jewish Health Identifier: NCT00379678     History of Changes
Other Study ID Numbers: HS-2042
Novartis study #CASM981CUS39
First Posted: September 22, 2006    Key Record Dates
Last Update Posted: March 29, 2017
Last Verified: March 2017

Keywords provided by National Jewish Health:
atopic dermatitis

Additional relevant MeSH terms:
Dermatitis, Atopic
Skin Diseases
Skin Diseases, Genetic
Genetic Diseases, Inborn
Skin Diseases, Eczematous
Hypersensitivity, Immediate
Immune System Diseases
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Dermatologic Agents
Immunosuppressive Agents
Immunologic Factors
Calcineurin Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action