Genomic Study for the Prediction of Efficacy and Adverse Effects of CD11a Monoclonal Antibodies(Raptiva)

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: NCT00602823
Recruitment Status : Completed
First Posted : January 28, 2008
Last Update Posted : January 28, 2008
Information provided by:
National Taiwan University Hospital

Brief Summary:
The pathogenesis of psoriasis has evolved from epidermal hyperproliferation to immune dysregulation in recent years. A Th1 cytokine profile is universally found is psoriasis. Biologics targeting the immune system have become the focus of study. Raptiva (Efalizumab) is one of biologics indicated for the treatment of psoriasis, and is the first biologic approved for use in psoriasis in the EU (EMEA). In USA, it is the second biologic drug (after Amevive) for psoriasis. Raptiva is a humanized chimeric antibody of CD11a (LFA-1), which blocks the interaction of CD11and ICAM─1, thus preventing lymphocyte trafficking. It is used for moderate to severe chronic plaque type psoraisis. The first clinical trial of Raptiva in Asians iscurrently done in the department of Dermatology, National Taiwan University Hospital and the incidence of psoriatic arthritis (either de novo or aggravation of preexisting psoriatic arthritis) is significantly higher than previously reported in Western countries(30% versus 7%,and personal communication with doctors in Hong-Kong and Singapore also reveals a similar safety profile. It seems likely that a racial difference is present. Monocytes play a central role in the pathogenesis of psoriatic arthritis. It is thus intriguing to study the pathogenesis of Raptiva-induced aggravation of psoriatic arthritis by comparing the difference of monocyes response in the presence of Raptiva between patients with and without Raptiva-induced psoriatic arthritis. In further study, the CD11a genomic polymorphism will also be investigated. The suudy can provide us with important information on how a novel monoclonal antibody like Raptiva can have both therapeutic and detrimental actions on psoriasis. The short term benefit of the study will be in pharmacogenomics and pharmacoeconomics, finding the best candidates for the expensive drug. The long term goal will be the clarification of the pathogenesis of psoriasis and psoriatic arthritis.

Condition or disease

Study Type : Observational
Estimated Enrollment : 20 participants
Official Title: Ex Vivo Monocyte and Lymphocyte Stimulation Tests and Genomic Study for the Prediction of Efficacy and Adverse Effects of CD11a Monoclonal Antibodies(Raptiva)
Study Start Date : February 2006
Estimated Study Completion Date : May 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Psoriasis
U.S. FDA Resources

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Clinical diagnosis of psoriasis

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): NCT00602823

Sponsors and Collaborators
National Taiwan University Hospital
Study Chair: TSEN-FANG Tsai, MD TSEN-FANG Tsai Identifier: NCT00602823     History of Changes
Other Study ID Numbers: 9561701002
First Posted: January 28, 2008    Key Record Dates
Last Update Posted: January 28, 2008
Last Verified: February 2006

Additional relevant MeSH terms:
Skin Diseases, Papulosquamous
Skin Diseases
Antibodies, Monoclonal
Immunologic Factors
Physiological Effects of Drugs