Abstract
Psoriasis vulgaris is a chronic immune-mediated inflammatory disease of the skin. Biologic therapy has been available for more than 10 years and has become one of the standard treatments for patients with moderate to severe psoriasis. Initially, only biologics against tumour necrosis factor alpha (TNF-α) were used, and only later did drugs against different interleukins (ILs), including IL-17 or IL-23, became available. The side effects of biologic therapy include paradoxical adverse events (PAEs), such as palmoplantar pustular reaction, especially with anti-TNF-α drugs. We present the case of a 49-year-old female patient with diabetes and psoriasis and psoriatic arthritis treated with an adalimumab biosimilar who developed a severe PAE of the palmoplantar pustular type. Treatment with adalimumab was stopped and the patient switched to ixekizumab which was successful. When a paradoxical reaction develops during biologic therapy, especially when it is severe as in our patient, switching to another class of biologics is advised.
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Biologic therapy is highly effective for the treatment of psoriasis but has been linked with paradoxical adverse events (PAEs). |
PAEs of the palmoplantar pustular type have been described mainly with anti-tumour necrosis factor alpha biologic agents, but similar cases have been reported with anti-interleukin-17 therapy. |
In severe cases of PAEs a switch to a biologic with a different mechanism of action is suggested. |
Introduction
Psoriasis vulgaris is a chronic immune mediated inflammatory disease of the skin affecting approximately 2–3% of the general population [1]. Biologic therapy is routinely used for the treatment of moderate to severe psoriasis [2]. Different biologic drugs are available with specific mechanisms of action, such as blocking the activity of tumour necrosis factor alpha (TNF-α), interleukin (IL)-17, IL-23 or IL-12/23 [2]. Anti-TNF-α drugs, such as adalimumab, have been available for over 10 years and are being used to treat different immune-mediated inflammatory diseases, including psoriasis, psoriatic arthritis, hidradenitis suppurativa and inflammatory bowel disease (IBD) [3]. One of the side effects of biologic drugs, and especially of anti-TNF-α therapy, are several “paradoxical” adverse events (PAEs), such as exacerbation of the disease for which the drug is used, change in disease phenotype or onset of another condition [3, 4].
Case Report
We report the case of a 49-year-old female patient with diabetes and psoriasis and psoriatic arthritis (PsA) who had a history of intolerance to phototherapy and methotrexate. The patient had moderate to severe psoriasis with a Psoriasis Area and Severity Index (PASI) score of 14.8, thus we decided to initiate treatment with an adalimumab biosimilar. The patient showed a good response after 8 weeks of therapy, but on the tenth week she developed a pustular eruption on both the palms of her hands and soles of her feet. In response, we added topical calcipotriol/betamethasone foam to the therapeutic regimen, but the condition rapidly worsened with massive pustulation, exacerbation of plaque psoriasis, swelling and pain of the joints (Fig. 1a–d), which led to the decision to discontinue adalimumab. Blood results revealed neutrophilia (7.04 × 109/L) and increased C-reactive protein (69.1 mg/L), but as no signs of infection were present, we assigned these results to the skin lesions and to the exacerbation of PsA. After 2 weeks, the pain and swelling of the joints got worse and the skin condition showed no improvement; the decision was taken to switch the patient to ixekizumab on the label dose for psoriasis. A rapid improvement of the skin lesions was observed after 7 days. The disease became stable with minor pustules on the soles. After 16 weeks on ixekizumab, plaque psoriasis and lesions on the palms of her hands were completely healed (Fig. 2c, d) although some hyperkeratosis with minimum pustules was still present on the soles of her feet (Fig. 2a, b). Swelling and pain of the joints also significantly improved.
The patient described herein provided informed consent to publish the details of her case.
Discussion
Paradoxical adverse events can be defined as a new onset or worsening of a pathological condition during therapy with a biologic agent that under normal conditions responds well to this class of drug [4]. Different reactions have been described during anti-TNF-a treatment, with the most common being psoriasiform and pustular eruptions [5, 6]. Change in the phenotype of the disease for which the biologic is used, such as new onset of palmoplantar pustulosis, in a patient treated for psoriasis is quite rare, with these reactions more often seen in patients treated with anti-TNF-α for rheumatic diseases or for IBD [7, 8]. Our patient had psoriasis as well as PsA.
A number of authors have attempted to explain the immunopathogenesis of paradoxical psoriasiform skin lesions. One proposed theory is that plasmacytoid dendritic cells increase the production of interferon gamma secondary to TNF-α antagonism, subsequently leading to T-cell activation and a further increase in TNF-α production [9]. A second hypothesis is that the increased production of T-helper 17 cells (Th17) and downregulation of regulatory T cells (Tregs) after blockade of TNF-α can lead to increased production of IL-17 [10]. This hypothesis is supported by the rapid improvement observed in our patient after the initiation of treatment with ixekizumab, which is a humanized monoclonal antibody against IL-17A. Tillack et al. described increased levels of IL-36γ and IL-17C in anti-TNF-α-induced psoriasiform lesions in patients with Crohn’s disease [11]. Paradoxical reactions of the palmoplantar pustular type have also been newly described with all anti-IL-17 drugs (ixekizumab, secukinumab and brodalumab) [12, 13], with the authors explaining that the mechanism of PAEs in anti-IL-17 drugs may be due to a paradoxical increase of TNF-α through blockade of IL-17A. In most of the published cases of paradoxical reactions with anti-IL-17 drugs the patients were switched to either anti-IL-12/23 or anti-IL-23 drug, with the exception of one patient who developed hidradenitis suppurativa during secukinumab therapy and was successfully treated with adalimumab [12,13,14]. Our patient showed a fast response to treatment following the switch to ixekizumab from adalimumab, which shows that therapy with an anti-IL-17A drug could be a treatment option for a paradoxical reaction of the palmoplantar pustulosis type during anti-TNF-α therapy for patients with psoriasis even though PAEs have also been described with anti-IL-17 drugs. Our case report adds evidence to the existing literature and suggests that when a class-specific adverse event occurs, the biologic agent being used should be switched to another biologic with a different mechanim of action [15].
Conclusions
Paradoxical adverse events, especially those of the palmoplantar pustulosis type, have been described with different biologic drugs, but mostly with anti-TNF-α. Topical therapy can be sufficient to control the PAE in some cases, but if a severe exacerbation develops, as in our patient, switching to a biologic drug of a different class is suggested. Further investigation is needed to better understand the pathophysiology of paradoxical reactions and ideally identify markers which can suggest which patients are at higher risk of developing PAEs when treated with a specific class of biologic.
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Acknowledgements
We thank the patient described in this case report.
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No funding or sponsorship was received for this study or publication of this article.
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All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
Author Contributions
Spyridon Gkalpakiotis designed and wrote the paper. Simona Tivadar and Marketa Fridman contributed to the design of the paper.
Disclosures
Spyridon Gkalpakiotis has served as consultant, speaker and/or investigator for Abbvie, Celgene, Eli Lilly, Janssen, Leo Pharma, Novartis, Pfizer and UCB. Simona Tivadar and Marketa Fridman have nothing to disclose.
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The patient described herein provided informed consent to publish the details of her case.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Gkalpakiotis, S., Fridman, M. & Tivadar, S. Adalimumab Biosimilar-Induced Severe Paradoxical Palmoplantar Pustulosis in a Patient with Psoriasis and Psoriatic Arthritis Successfully Treated with Ixekizumab. Dermatol Ther (Heidelb) 12, 605–609 (2022). https://doi.org/10.1007/s13555-021-00672-z
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DOI: https://doi.org/10.1007/s13555-021-00672-z