Cutaneous lymphocyte-associated antigen as a novel predictive marker of TNF-alpha inhibitor biological therapy in psoriasis

Biomarkers predictive of treatment response in psoriasis and psoriatic arthritis: a systematic review

AIMS

The ability to predict response to treatment remains a key unmet need in psoriatic disease. We conducted a systematic review of studies relating to biomarkers associated with response to treatment in either psoriasis vulgaris (PsV) or psoriatic arthritis (PsA).

METHODS

A search was conducted in PubMed, Embase and the Cochrane library from their inception to 2 September 2020, and conference proceedings from four major rheumatology conferences. Original research articles studying pre-treatment biomarker levels associated with subsequent response to pharmacologic treatment in either PsV or PsA were included.

RESULTS

A total of 765 articles were retrieved and after review, 44 articles (22 relating to PsV and 22 to PsA) met the systematic review's eligibility criteria. One study examined the response to methotrexate, one the response to tofacitinib and all the other studies to biologic disease-modifying antirheumatic drugs (DMARDs). Whilst several studies examined the HLA-C*06 allele in PsV, the results were conflicting. Interleukin (IL)-12 serum levels and polymorphisms in the IL-12B gene show promise as biomarkers of treatment response in PsV. Most, but not all, studies found that higher baseline levels of C-reactive protein (CRP) were associated with a better clinical response to treatment in patients with PsA.

CONCLUSION

Several studies have identified biomarkers associated with subsequent response to treatment in psoriatic disease. However, due to the different types of biomarkers, treatments and outcome measures used, firm conclusions cannot be drawn. Further validation is needed before any of these biomarkers translate to clinical practice.

Origin, function and role in the development of skin diseases CLA+T-lymphocytes

The idea of CLA+T-lymphocytes, which are a special subpopulation of cells with a tropic to the skin, is given. The issues of maturation, migration and functional features of CLA+T-cells are considered. Special attention is paid to the different phenotype of memory T-cells. Modern data concerning the role of CLA+T-cells in the pathogenesis of autoimmune and allergic dermatoses, as well as malignant skin tumors are also presented. The conclusion about the necessity of further study of CLA +T-lymphocytes for detailed understanding of pathogenesis and search of variants of targeted therapy in psoriasis, atopic dermatitis, skin lymphomas and other skin diseases is made.

Recommendations for managing a suboptimal response to biologics for moderate-to-severe psoriasis: A Belgian perspective

Over the past decade, biologics have become the gold standard in the treatment of moderate-to-severe psoriasis for patients who have failed or who have contraindications to traditional systemic treatments. However, although practical recommendations on how to treat a suboptimal response to biologics exist in other chronic inflammatory diseases, they are only just beginning to emerge for psoriasis. This article aims to formulate recommendations in the case of a suboptimal response of psoriasis to biologics in the Belgian setting. A Belgian taskforce of psoriasis experts was convened to review the results of a literature search and formulate recommendations based on the available evidence and provide expert opinion to address gaps in the evidence. The taskforce has proposed a treatment algorithm for patients with a primary non-response or a secondary loss of response to help address an unmet need. Expert recommendations have been developed to address treatment strategies in case of a primary or secondary suboptimal response to biologics in the treatment of moderate-to-severe psoriasis in Belgium.

Psoriasis

Psoriasis is a common chronic inflammatory skin disease with a spectrum of clinical phenotypes and results from the interplay of genetic, environmental, and immunological factors. Four decades of clinical and basic research on psoriasis have elucidated many of the pathogenic mechanisms underlying disease and paved the way to effective targeted therapies. Here, we review this progress and identify future directions of study that are supported by a more integrative research approach and aim at further improving the patients' life.

Circulating CLA+ T lymphocytes as peripheral cell biomarkers in T-cell-mediated skin diseases

T lymphocytes expressing the CLA antigen constitute a subset of effector memory lymphocytes that are functionally involved in T-cell-mediated cutaneous diseases. Skin-seeking lymphocytes recirculate between inflamed skin and blood during cutaneous inflammation. Many studies in different T-cell-mediated inflammatory cutaneous diseases have clearly related their pathologic mechanisms to CLA+ T cells. Based on common features of these cells in different cutaneous disorders mediated by T cells, we propose that circulating CLA+T cells could constitute very useful peripheral cellular biomarkers for T-cell-mediated skin diseases.

Clinical predictors of non-response to any tumor necrosis factor (TNF) blockers: a retrospective study

BACKGROUND

Anti-tumor necrosis factor (TNF)-α therapies represent a significant innovation in therapy for psoriasis. However, a significant number of psoriasis patients do not respond well to TNF blockers or show an insufficient control of disease activity on a long-term basis.

OBJECTIVE/AIM

The aim of this study was to recognize specific clinical factors that could be associated with a non-response to any available TNF blockers in patients with moderate-to-severe plaque psoriasis.

MATERIALS AND METHODS

The authors reviewed the medical records of all patients who had started etanercept, infliximab, adalimumab and had achieved a minimum of 24 months follow-up. The authors identified subjects who were not responsive to all available anti-TNF agents, whatever the chronology of their use.

RESULTS

A total of 110 patients were retrospectively examined. Thirteen patients were identified as "non-responders" to all available TNF-α blockers. Current smoking at the start of anti-TNF therapy was associated with non-response to TNF blockers. The group of "non-responders" presented a high mean body mass index and a high baseline PASI score with respect to the group of responders.

CONCLUSIONS

The data showed that the majority of non-responder patients were smokers, overweight or obese and had a high baseline PASI score. Concomitant arthritis was not significantly associated with non-response.

Development of lupus erythematosus during infliximab treatment

Infliximab is a TNFα inhibiting recombinant monoclonal antibody, which provides an efficient therapeutic opportunity in the treatment of psoriasis and other immune-mediated inflammatory diseases. It is well tolerated and improves quality of life significantly. The authors present a case of drug-induced lupus erythematosus as a possible side effect of this medication. The patient developed psoriasis 9 years ago when she was on beta-receptor blocker therapy. The symptoms deteriorated despite topical and systemic treatments and, therefore, biological therapy was introduced. In the third year of treatment drug-induced lupus erythematosus was diagnosed on the background of general symptoms. After cessation of the biologic treatment a low dose corticosteroid therapy was introduced which proved to be effective. Symptoms as well as pathological laboratory parameters showed an improvement. The authors conclude that biologicals are effective and safe in the treatment of psoriasis, nevertheless, they have risks too. To reduce side effects a meticulous follow-up of patients is essential. Any general symptom requires careful examination since they might be linked to serious side effects of the biological therapy. Orv. Hetil., 2013, 154, 590–598.