TL1A Expression in Psoriatic Skin

Psoriasis Clinical Trial

Official title:

An Exploratory Study Investigating TL1A Expression in Psoriatic Skin and Serum and Monocytes Capacity to Produce TL1A

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT01744327
• Other study ID #: 331536
• Status: Active, not recruiting
• Phase: N/A
• First received: December 5, 2012
• Last updated: May 27, 2013
• Start date: December 2012

Study information

• Verified date: May 2013
• Source: Bispebjerg Hospital
• Contact: n/a
• Is FDA regulated: No
• Health authority: Denmark: Ethics Committee
• Study type: Observational

Clinical Trial Summary

TL1A is a newly discovered signal molecule that may be crucially involved in the maintenance of chronic inflammatory disorders. TL1A has also been demonstrated in psoriatic skin but the importance of TL1A in psoriasis is still unknown. Understanding inflammatory signal molecules in psoriasis is important because the development of new drugs directed against relevant signal molecules (e.g. TNF-α and IL12/23) has proved to be a very efficacious treatment principle. However, despite the dramatic progress in therapeutic options during the last decade, there is still a fraction of patients that are insufficiently treated with the currently available therapies. TL1A has been claimed to be the next important target for development of biologics in the field of chronic inflammation.

Description:

Psoriasis is a common autoimmune disease; affecting approximately 2 % of the western population. Among these 15% are estimated to have severe disease that requires systemic therapy with e.g. methotrexate, cyclosporine or acitretin that are all drugs associated with high frequencies of side-effects. In contrast to this the recent development of the biologic drugs has provided very efficacious and in general well-tolerated new therapeutics. But even with these newer drugs treatment-failures exist and for this group new treatments are needed TNF-like ligand 1A (TL1A) is a novel member of the TNF family of cytokines. Increasing evidence suggests that in addition to TNF-alfa and IFN-gamma psoriasis is also an IL-23 and IL-17 dependent disease so TH1 and TH17 T cells are suggested to be important in driving the disease. Therefore TL1A, which through binding to DR3 influences TH1 and TH17 T cell differentiation, could be an important cytokine in the early inflammatory process in psoriasis. Recently expression of TL1A in psoriatic skin lesions has been demonstrated but the importance of this remains to be investigated.

TL1A exists in both a membrane bound- and a soluble form and is secreted from antigen presenting cells (APCs) such as monocytes, dendritic cells and macrophages in response to stimulation with immune complexes, bacteria or cytokines (TNF-alfa and IL-1beta). Membrane bound TL1A has also been described in T cells. Recently, a new isoform of soluble TL1A (TL1A(V84-L251)) was discovered with functional differences to TL1A(L72-L251. It's unknown whether this isoform is present in psoriatic skin.

Research on TL1A has focused on autoimmune diseases where immune complexes are formed, e.g. rheumatoid arthritis. However, studies have suggested that early pathogenesis in psoriasis could dependent on formation of large complexes between bacterial DNA and the anti-microbial peptide LL-37 which induce cytokine secretion from APC. Cytokines that could lead to TL1A excretion. Whether TL1A can be secreted in this way is unknown.

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 20
• Est. primary completion date: December 2013
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Plaque type psoriasis

• at least 6 month history of psoriasis

Exclusion Criteria:

• systemic anti-psoriatic medication

• topical anti-psoriatic medication (wash-out period 2 weeks)

Study Design

Observational Model: Case Control, Time Perspective: Prospective

Related Conditions & MeSH terms

• Psoriasis

Locations

Country	Name	City	State
Denmark	Department of dermatology D40 , Bispebjerg Hospital	Copenhagen

Sponsors (3)

Lead Sponsor	Collaborator
Bispebjerg Hospital	AbbVie, University of Copenhagen

Country where clinical trial is conducted

Denmark, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Expression of TL1A in psoriatic skin	Staining intensity of TL1A by IHC in involved psoriatic skin compared to uninvolved and skin from normal controls	3 months	No