Ixekizumab for the treatment of patients with active psoriatic arthritis and an inadequate response to tumour necrosis factor inhibitors: results from the 24-week randomised, double-blind, placebo-controlled period of the SPIRIT-P2 phase 3 trial

Safety and effectiveness of ixekizumab in Japanese patients with psoriasis vulgaris, psoriatic arthritis, generalized pustular psoriasis, and erythrodermic psoriasis: Post-marketing surveillance

We report findings from a post-marketing study conducted from November 2016 to September 2022, which evaluated the safety and effectiveness of ixekizumab in Japanese patients with psoriasis under routine clinical practice for up to 52 weeks, and the incidence of serious infections and malignancies for up to 3 years. Of 804 patients in this analysis (67.9% male; median age, 54 years; mean disease duration, 11.8 years), 72.9%, 37.7%, 7.8%, and 3.7% had psoriasis vulgaris, psoriatic arthritis, pustular psoriasis, and erythrodermic psoriasis, respectively (subtypes not mutually exclusive). At 52 weeks, adverse events were reported in 203 patients (25.3%). Serious adverse events were reported in 36 patients (4.5%), including serious infections and infestations (n = 13, 1.6%). The incidence of serious infections and benign, malignant, and unspecified neoplasms was 0.8% (n = 5) and 0.6% (n = 4) respectively, at 3 years. Overall, 137 patients (17.0%) received Q2/Q2 treatment (160 mg starting dose, followed by 80 mg every 2 weeks from week 12); 550 patients (68.4%) received Q2/Q4 treatment (160 mg starting dose, followed by 80 mg every 2 weeks from weeks 2 to 12 and 80 mg every 4 weeks thereafter); and 117 patients (14.6%) discontinued before week 12 or received only one dose after week 12. A higher proportion of patients in the Q2/Q2 group had psoriatic arthritis (56.9% [n = 78]) compared with the Q2/Q4 group (32.9% [n = 181]). Among patients in the Q2/Q2 versus the Q2/Q4 dose groups, 21 (15.3%) and 141 (25.6%) respectively had adverse events and 2 (1.5%) and 32 (5.8%) respectively had serious adverse events. The mean Psoriasis Area and Severity Index score and body surface area percentage significantly decreased from baseline to week 52 for all psoriasis subtypes and by Q2/Q2 and Q2/Q4 ixekizumab doses (p < 0.01 or p < 0.001). Overall, the safety and effectiveness of ixekizumab in real-world settings in Japan were similar to those reported in clinical trials.

Psoriatic arthritis: A comprehensive review for the dermatologist-Part II: Screening and management

Psoriatic arthritis (PsA) is a common comorbidity of psoriasis occurring in up to one-third of patients. Dermatologists hold an essential role in screening patients with psoriasis for PsA, since as many as 85% of patients develop psoriasis before PsA. Early detection and treatment of PsA are important for both short- and long-term patient outcomes and quality of life. Many factors must be weighed when selecting the appropriate therapy for PsA. One must consider the 'domains of disease' that are manifested, the disease severity, patient comorbidities, patient preferences (routes of dosing or frequency, as examples) as well as factors often outside of patient-physician control, such as access to medications based on insurance coverage and formularies. As many patients will have involvement of multiple domains of psoriatic disease, selecting the therapy that best captures the patient's disease is required. In this review, we will address PsA screening, diagnosis, therapeutic approach to psoriatic disease, comorbidity considerations, and comanagement.

Identification of JNJ-61803534, a RORγt Inverse Agonist for the Treatment of Psoriasis

The retinoic acid receptor-related orphan receptor gamma t (RORγt) is a nuclear transcription factor expressed in both innate and adaptive immune cells, driving Th17 cell differentiation and IL-17 production. The IL-23/IL-17 pathway is implicated in autoimmune and inflammatory diseases, and biologics that target IL-23/IL-17 signaling are efficacious in the treatment of psoriasis and psoriatic arthritis. RORγt, at the core of this pathway, represents an attractive opportunity for small-molecule intervention; however, combining high potency, nuclear receptor selectivity, and good physicochemical properties remains a challenge for RORγt inverse agonists. Recently, thiazole amides have been identified as potent RORγt inverse agonists; however, they often suffer from CYP450 autoinduction in the rat, precluding further development. Herein, we describe the discovery and development of potent and selective thiazole bisamide RORγt inverse agonists that avoid autoinduction in the rat. This effort culminated in the discovery of JNJ-61803534, which advanced into phase 1 clinical trials.

Synergistic Improvements in Synovitis, Enthesitis, and Patient-Reported Outcomes for Patients with Psoriatic Arthritis Treated with Ixekizumab in SPIRIT Trials

INTRODUCTION

Synovitis and enthesitis are key manifestations in psoriatic arthritis (PsA). This descriptive analysis investigated the association between improvement in synovitis and enthesitis, individually and combined, and improvement in patient-reported outcomes (PROs) including health-related quality of life (HRQoL) for patients with PsA from the SPIRIT-P1, SPIRIT-P2, and SPIRIT-H2H trials who presented with synovitis and enthesitis at baseline and received ixekizumab (IXE) treatment.

METHODS

In this post hoc analysis, data are presented from patients with PsA treated with IXE every 4 weeks from two phase III studies (SPIRIT-P1 and SPIRIT-P2) and one phase IIIb/IV study (SPIRIT-H2H) who had both synovitis and enthesitis at baseline. Associations between improvements in synovitis and improvements in enthesitis were explored using Pearson analyses through week 52. Associations between improvements in both, either, and neither condition with improvements in PROs (36-item Short Form Health Survey Physical Component Score [SF-36 PCS], the European Quality-of-Life 5 Dimensions 5 Levels [EQ-5D-5L] including the EQ-5D Visual Analogue Score [VAS] and the EQ-health index, Patient's Global Assessment [PtGA], and pain VAS) were assessed descriptively through week 52.

RESULTS

Results demonstrated the synergistic improvements in synovitis and enthesitis, individually or combined, and improvements in PROs including HRQoL, for patients treated with IXE through week 52. An association between improvements in synovitis and enthesitis symptoms was observed through week 52. Patients who achieved resolution of both synovitis and enthesitis reported highest improvements in SF-36 PCS, EQ-5D-5L, pain VAS, and PtGA.

CONCLUSION

Synergistic improvements in two key PsA domains, namely synovitis and enthesitis, and improvements in PROs including HRQoL, were observed for patients with PsA treated with IXE through week 52. These findings support PsA treatment goal aiming to achieve the lowest possible level of disease activity in all disease domains.

TRIAL REGISTRATION NUMBERS

SPIRIT-P1 (NCT01695239), SPIRIT-P2 (NCT02349295), and SPIRIT-H2H (NCT03151551).

The Role of IL-17A in Mediating Inflammatory Responses and Progression of Neurodegenerative Diseases

IL-17A has been implicated as a critical pro-inflammatory cytokine in the pathogenesis of autoimmune and neurodegenerative disorders. Emerging evidence indicates its capacity to activate microglial cells and astrocytes, subsequently inducing the production of inflammatory mediators that exacerbate neuronal injury and functional impairment. Clinical observations have revealed a demonstrated association between IL-17A concentrations and blood-brain barrier (BBB) dysfunction, creating a pathological feedback loop that amplifies neuro-inflammatory responses. Recent advances highlight the cytokine's critical involvement in neurodegenerative disorders through multiple molecular pathways. Therapeutic interventions utilizing monoclonal antibodies (mAbs) against IL-17A or its cognate receptor (IL-17R) have shown promising clinical potential. This review systematically examines the IL-17A-mediated neuro-inflammatory cascades; the mechanistic contributions to neurodegenerative pathology in the established disease models including multiple sclerosis, Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis; and current therapeutic strategies targeting the IL-17A signaling pathways. The analysis provides novel perspectives on optimizing cytokine-directed therapies while identifying the key challenges and research priorities for translational applications in neurodegeneration.

Risk of Malignancy Related to Ixekizumab in Patients With Psoriatic Arthritis or Axial Spondyloarthropathy: Systematic Review and Meta-analysis

BACKGROUND

We aimed to estimate the risk of malignancy associated with ixekizumab in randomized controlled trials (RCTs) and long-term extension studies (LTEs) in patients with rheumatological indications.

METHODS

A systematic review of the literature up to June 2024 was performed to analyze the risk of malignancy associated with ixekizumab use in patients with psoriatic arthritis and axial spondyloarthritis. The primary endpoint was overall malignancy risk in RCTs and LTEs. Meta-analyses of RCTs were performed when at least 3 studies had comparable outcome measures using Peto odds ratios. For LTEs, meta-analyses were performed using random-effects computing incidence rates (IRs) per 100 patient-years.

RESULTS

Twelve articles, 4 LTEs and 8 pooled analyses, were included. Meta-analyses of RCTs for malignancy risk at week 24 showed a Peto odds ratio of 0.45 (0.11-1.86), with an I2 of 43.0%. When stratified according to the comparator, heterogeneity decreased. Malignancy risk comparing ixekizumab with placebo was 1.43 (0.18-11.53), with an I2 of 39.6%. Malignancy risk comparing ixekizumab with adalimumab was 0.11 (0.01-0.77), with an I2 of 0%. At week 52, the IR of all malignancies with ixekizumab was 0.31 (0.07-0.72), with an I2 of 18.9%. At 156 weeks, the IR of all malignancies with ixekizumab was 0.58 (0.29-0.96), with an I2 of 0%.

CONCLUSION

Ixekizumab appears to confer a low malignancy risk in patients treated for rheumatological indications. Patients with psoriatic arthritis and axial spondyloarthritis appeared to be at similar risk, except for those with nonmelanoma skin cancer.

Precision medicine using molecular-target drugs in psoriatic arthritis

Psoriatic arthritis (PsA) presents various clinical manifestations, including skin lesions, peripheral arthritis, axial involvement, enthesitis, nail involvement, dactylitis, and uveitis. In addition, it causes a high incidence of lifestyle-related diseases and an increase in cerebrovascular and cardiovascular events. As the pathology of PsA has been clarified, molecular-targeted drugs targeting tumor necrosis factor-α, interleukin (IL)-17A, IL-17A/F, IL-17 receptor, IL-12/23(p40), IL-23p19, Cytotoxic T-lymphocyte Antigen-4 (CTLA-4), Janus kinase, and phosphodiesterase-4 have been developed and are widely used in clinical practice. PsA is clinically and molecularly heterogeneous, and it is necessary to improve various clinical symptoms with limited treatment options simultaneously; therefore, rheumatologists sometimes encounter difficult situations in clinical practice. Hence, the development of precision medicine may improve treatment outcomes. Recently, the strategic use of molecular-targeted drugs based on the stratification of patients with PsA by peripheral blood lymphocyte phenotyping and serum cytokine concentrations has been reported to possibly lead to a higher therapeutic response. A randomized controlled trial was initiated to verify the efficacy of this treatment strategy. However, to make precision medicine in PsA feasible, shifting from conventional clinical trials to clinical trials based on biomarker profiles and accumulating further data are necessary.

Advances in the management of psoriatic arthritis in adults

Psoriatic arthritis is an inflammatory arthritis that affects around 30% of patients with psoriasis. The disease spectrum includes peripheral arthritis, enthesitis, tenosynovitis, dactylitis, axial involvement, and skin and nail psoriasis in most patients. In addition to the cutaneous and musculoskeletal manifestations, several comorbidities can complicate the disease course, including cardiovascular disease, diabetes mellitus, metabolic syndrome, gout, anxiety, and depression. The management of patients with psoriatic arthritis begins with a careful assessment of the skin and joints and screening for comorbidities. This review describes the assessment tools and outcome measures used in the evaluation of patients with psoriatic arthritis. It summarizes the approach to therapy, including non-medicinal interventions such as education, lifestyle changes, physiotherapy, and occupational therapy. It discusses the evidence on pharmacologic treatments, including drugs used for symptomatic relief such as non-steroidal anti-inflammatory drugs, and those used to control the disease process; this last group comprises conventional synthetic disease modifying anti-rheumatic drugs (DMARDs), including methotrexate, leflunomide, and sulfasalazine, and biologic and targeted DMARDs, including anti-tumor necrosis factor (TNFα), anti-interleukin-17 (IL-17), anti-IL-12/23, and anti-IL-23 agents, as well as Janus kinase (JAK) inhibitors and phosphodiesterase 4 (PDE4) antagonists. Although these drugs are usually tailored to the clinical profile of the patient, biomarkers predictive of response to therapy are needed so that a more personalized approach can be followed.

Treatment controversies in spondyloarthritis and psoriatic arthritis: focus on biologics and targeted therapies

INTRODUCTION

There are several treatment controversies that have emerged in spondyloarthritis and psoriatic arthritis. These are related to the nature of the conditions as well as to the use of medications.

AREAS COVERED

This review, which included a search of PubMed database as well as the references within the articles provides an overview of the nature of spondyloarthritis, controversy over the inclusion of psoriatic arthritis (PsA) as a peripheral spondyloarthritis, and a summary of current treatments for both PsA and axial spondyloarthritis (axSpA), with special emphasis on targeted therapy. The review highlights the differences in response to certain medications, particularly biologic therapy and summarizes the randomized controlled trials in psoriatic arthritis and axial spondyloarthritis providing data about the responses in table format.

EXPERT OPINION

There is a need for better outcome measures in axSpA. Currently, the measures are subjective. Imaging may be more appropriate but there is a need for research into the reliability and responsiveness of imaging techniques. In PsA, there may also be better response measures and research into the reliability and responsiveness of available measures is underway. There is also a need for novel therapies as well as biomarkers for response in both diseases.

Infections in psoriatic arthritis: association with treatment

Serious infections (SIs) remain one of the most significant comorbidities in patients with inflammatory arthritides including psoriatic arthritis (PsA). Apart from methotrexate (MTX) and biologics such as tumor necrosis factor (TNFi), interleukin-12/23 (IL-12/23i), and IL-17 inhibitors (IL-17i), traditionally used for the treatment of PsA, recently biologics such as IL-23i and targeted synthetic agents like JAK inhibitors (JAKi) have been introduced in the daily clinical practice for the treatment of this disease. Although overall the incidence of SIs in patients with PsA treated with these agents is lower compared to patients with rheumatoid arthritis, still a number of unresolved issues regarding their safety remain. Current evidence is reassuring regarding the safety profile of conventional synthetic disease-modifying anti-rheumatic drugs, such as MTX. The increased risk for reactivation of latent infections, such as tuberculosis and hepatitis B virus (HBV) with the use of TNFi, is well described; nevertheless, it is significantly ameliorated with the appropriate screening and prophylaxis. Regarding IL-12/23i and IL-17i, there are no significant safety signals, except from an increased incidence of usually mild Candida infections with the latter class. Newer biologics such as IL-23i and targeted synthetic agents like JAKi have been recently introduced in the daily clinical practice for the treatment of this disease. While IL-23i has not been shown to increase the risk for common or opportunistic infections, a well-established association of JAKi with herpes zoster warrants the attention of rheumatologists. In this narrative review, we summarize the infectious complications of available treatment options by drug class in patients with PsA.

Unintended Consequences of Immune Therapy for Immune-Mediated Diseases: Paradoxical Psoriasis and Dupilumab-Associated Musculoskeletal Syndrome

Two presentations at the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) 2023 annual meeting focused on unintended consequences of immunomodulatory therapy for psoriasis (PsO). Dr. Elizabeth Wallace presented on unintended consequences of tumor necrosis factor inhibitors for treating PsO and other inflammatory disorders. These consequences include paradoxical PsO, which is defined as unexpected new PsO cases or worsening PsO symptoms seemingly induced by treatment. Dr. Bruce Kirkham focused on unintended consequences of dupilumab treatment, which can include a musculoskeletal syndrome similar to psoriatic arthritis.

Filling the "GAP" in Real-World Assessment of Psoriatic Arthritis Disease Activity: Performance Characteristics of a Global/Pain Composite Endpoint

INTRODUCTION

Some retrospective data sources, such as electronic health records in the USA, report composite outcome measures not fully validated in psoriatic arthritis (PsA). However, they often contain global assessments, such as a Physician Global Assessment (PhGA) and Patient Global Assessment (PatGA), along with patient-reported pain scores, which individually are considered validated in PsA. This research described the performance characteristics of a 3-item global assessment and pain (GAP) composite endpoint using data from the ixekizumab phase 3 PsA clinical trial program.

METHODS

Discrimination of GAP was assessed by comparing placebo to active treatment arms. The magnitude of treatment effect and responsiveness were compared to Disease Activity Index for PsA (DAPSA), clinical DAPSA, DAPSA28, and Psoriatic Arthritis Disease Activity Score (PASDAS) using effect size (ES) and standardized response mean (SRM), respectively. Construct validity was evaluated through correlation among the composite endpoints, and with other physician- and patient-reported outcomes. Change in GAP was compared in patients who reached low disease activity (LDA) levels based on DAPSA, cDAPSA, and PASDAS vs those who did not.

RESULTS

GAP discriminated between active treatment and placebo with statistically significant separation as early as week 1. The largest ES/SRM was seen with GAP (2.29/1.74) and PASDAS (2.47/1.68). GAP had the strongest correlation with PASDAS (0.81-0.92) and showed moderate correlations with patient-assessed physical function, low correlations with physician-assessed skin and nail psoriasis, and low to moderate correlation with physician-assessed enthesitis. A significantly greater improvement in GAP was seen in the groups achieving LDA states compared to those not (p < 0.001).

CONCLUSION

The GAP composite, an abbreviated endpoint comprising measures common in electronic health records, has promising performance characteristics and could be used to address important clinical questions regarding outcomes and impact of PsA in existing datasets. CLINTRIALS.

GOV IDENTIFIER

NCT01695239; NCT02349295.

Hot Topics: Depression in Individuals With Psoriasis and Psoriatic Arthritis

Psoriasis and psoriatic arthritis are associated with an increased risk of mental health conditions such as depression and anxiety. People with psoriatic disease (PsD) are also more likely to die by suicide than those without. Mood disorders affect people with PsD in a multitude of ways, such as in effectiveness of care, response to treatment, remission rates, and quality of life. Although the links between PsD and mental health conditions have not been fully elucidated, this review will highlight recent studies investigating shared biologic mechanisms between depression and PsD. Since mental health disorders can be assessed and treated effectively, dermatologists and rheumatologists should be aware of the mental health burden in individuals with PsD to accomplish the following: (1) educate their patients with PsD about this association, (2) screen for mental health conditions on an ongoing basis in their clinical practice, (3) refer their patients with PsD to a mental health professional when needed, and (4) ensure selection of a safe PsD treatment in the setting of comorbid mental health disease. Finally, important treatment considerations for individuals with PsD and depression are reviewed. This topic was presented at the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) 2023 annual meeting.

Comparative early effectiveness across 14 PsA drugs and 5 classes of PsA treatment: 3-month results from the PRO-SPIRIT study

BACKGROUND

The psoriatic arthritis (PsA) Observational Study of Persistence of Treatment (PRO-SPIRIT) assesses effectiveness and persistence of real-world PsA treatments. Ixekizumab (IXE) is an interleukin (IL)-17A inhibitor (i) (IL-17Ai), approved for the treatment of adult PsA.

METHODS

The aim of this predefined interim analysis was to report baseline characteristics along with early (3-month) descriptive and comparative real-world effectiveness in patients with PsA prescribed with advanced treatment including IL-17Ai; IXE or secukinumab (SEC), IL-12/23i, IL-23i, tumour necrosis factor (TNFi) or Janus kinase (JAKi).

RESULTS

1192 patients across 6 countries were analysed. At baseline, patients receiving IXE had longer disease duration and higher previous biological/targeted-synthetic disease-modifying antirheumatic drugs experience than patients starting TNFi and SEC 150, and less concomitant conventional-synthetic DMARD use than TNFi and JAKi. Comparative analyses at 3 months showed that: (a) versus TNFi, IXE exhibited similar improvement in clinical Disease Activity in PsA (cDAPSA) but significantly greater improvement in body surface area affected by psoriasis (BSA) and global assessments (physician GA, patient GA (PatGA)); (b) versus IL-12/23i and IL-23i (pooled), IXE showed significantly greater improvement in cDAPSA and PatGA; (c) IXE was as fast as JAKi in improving joint disease activity. Ad hoc analysis indicated that more patients with active psoriasis (BSA ≥3%) achieved minimal disease activity with IXE than JAKi or IL-12/23i. The responses to SEC varied by dosage.

CONCLUSIONS

This study confirms the rapid 3-month effectiveness of IXE on joint disease activity-as fast as TNFi and JAKi (cDAPSA), and exceeding IL-12/23i and IL-23i-along with clear benefits to skin.

Injection site reactions resulting from the use of biological therapy in the treatment of moderate-to-severe plaque psoriasis

INTRODUCTION

Biological medications have significantly improved the prognosis of psoriasis patients. All biological drugs (except infliximab) for psoriasis require subcutaneous (SC) administration. Adverse events of biologic drug treatment include injection site reactions. ISRs are a local phenomenon characterized by swelling, erythema, pruritus, and pain around the injection site.

AREAS COVERED

We conducted a review to analyze the differences between the ISRs of various biologics approved for psoriasis. Specifically, the review focused on anti-TNF-α, anti-IL12/23, anti-IL-17, and anti-IL-23 drugs.

EXPERT OPINION

Etanercept and adalimumab have reported ISR rates of 37% and 20%, respectively, with erythema, pruritus, pain, and irritation being the most common. Citrate free (CF) solution and thinner needles have reduced ISR associated with adalimumab. Ustekinumab showed a low risk of ISR. Regarding secukinumab and ixekizumab, pain was found to be the most common ISR. The introduction of CF ixekizumab formulation has shown promise in reducing ISRs associated with ixekizumab. The risk of ISR appears insignificant with bimekizumab, brodalumab, and anti-IL23 drugs, with ISR rates ranging from less than 1% to 7.1%. The choice of biologic agent should consider ISR risk. Education on injection techniques and the use of single-dose autoinjectors/pens can mitigate ISR risk.

Targeting cytokines in psoriatic arthritis

Psoriatic arthritis (PsA) is part of the psoriatic disease spectrum and is characterized by a chronic inflammatory process that affects entheses, tendons and joints. Cytokines produced by immune and non-immune cells play a central role in the pathogenesis of PsA by orchestrating key aspects of the inflammatory response. Pro-inflammatory cytokines such as TNF, IL-23 and IL-17 have been shown to regulate the initiation and progression of PsA, ultimately leading to the destruction of the architecture of the local tissues such as soft tissue, cartilage and bone. The important role of cytokines in PsA has been underscored by the clinical success of antibodies that neutralize their function. In addition to biologic agents targeting individual pro-inflammatory cytokines, signaling inhibitors that block multiple cytokines simultaneously such as JAK inhibitors have been approved for PsA therapy. In this review, we will focus on our current understanding of the role of cytokines in the disease process of PsA and discuss potential new treatment options based on modulation of cytokine function.

Retention Rate of Ixekizumab in Psoriatic Arthritis: A Real-World Study

We aimed to examine the drug retention rate (DRR) of the interleukin-17 inhibitor ixekizumab in a real-world monocentric cohort of psoriatic arthritis (PsA) patients and to assess the predictors of drug discontinuation. Consecutive PsA patients who underwent treatment with ixekizumab from October 2019 to February 2023 were enrolled in this observational, retrospective, monocentric study. Clinical records were assessed at baseline and throughout the follow-up period. We collected sociodemographic data, smoking habits, body mass index, the presence of Human Leukocyte Antigen B27, comorbidities, disease involvement and duration, previous therapy, discontinuation of ixekizumab, reasons for discontinuation, and adverse events (AEs). DRR was evaluated as time to drug discontinuation and assessed through Kaplan-Meier curves. Baseline factors predicting drug discontinuation were investigated through logistic regression models. Eighty PsA patients were included in this study. Ixekizumab was administered at a dose of 160 mg by subcutaneous injection at baseline, followed by 80 mg every four weeks thereafter. Ixekizumab had a 38-month-cumulative DRR of 43.8%, accounting for both inefficacy and AEs. When considering only inefficacy, the DRR was 62.6%. Comorbidities (p = 0.665), obesity (p = 0.665), smoking (p = 0.884), disease duration ≤ 2 years (p = 0.071), axial (p = 0.131) and skin involvement (p = 0.460), and previous therapies, including conventional synthetic (p = 0.504) and biological (p = 0.474) Disease-Modifying Antirheumatic Drugs (bDMARDs), as well as the number of previous bDMARDs or targeted synthetic Disease-Modifying Antirheumatic Drugs (tsDMARDs), did not significantly affect the DRR (p = 0.349). Multivariate analysis found no independent predictors of drug discontinuation. The most frequent AEs leading to discontinuation were skin reactions; no severe infections were observed. In our real-world study, comorbidities, disease duration, and previous therapies did not affect the DRR of ixekizumab. Ixekizumab had a favorable safety profile, with no severe AEs observed.

Real-World Treatment Patterns, Clinical Outcomes, and Symptom Burden in Patients With Psoriatic Arthritis Prescribed Ixekizumab in the United States

OBJECTIVE

The objective of this study was to describe the real-world characteristics and clinical status of patients with psoriatic arthritis (PsA) currently prescribed ixekizumab.

METHODS

Data were drawn from the Adelphi PsA Plus Disease Specific Programme (DSP), a cross-sectional survey conducted in the United States between September 2021 and March 2022. Rheumatologists provided data for their next five consulting patients currently receiving ixekizumab, including demographic and clinical characteristics, disease severity, treatment history, reasons for treatment choice, satisfaction with current treatment, and current and historic symptom burden. Patients voluntarily completed questionnaires, providing perceptional data on symptom burden and satisfaction with current treatment.

RESULTS

Overall, 68 rheumatologists provided data on 275 patients with PsA, 90 of whom completed the voluntary questionnaire. Patients had been prescribed ixekizumab for a mean of 11.7 (SD 10.6) months. Clinical characteristics, disease severity, and symptom burden of patients with PsA improved significantly from ixekizumab initiation to the most recent consultation, including symptom burden, tender and swollen joint counts, and body surface area affected by psoriasis (all P < 0.001). Both rheumatologists and patients were satisfied with ixekizumab treatment and reported improvements in pain and fatigue. Improvements were noted after more than three months of ixekizumab treatment duration and regardless of whether the patients had prior exposure to an advanced therapy or were treatment naïve.

CONCLUSION

Our results indicate that ixekizumab was efficacious in the treatment of PsA in real-world clinical practice, complementing efficacy data from randomized controlled clinical trials. The results of this study may assist rheumatologists and their patients in making informed treatment choices.

Phage Display Technology in Biomarker Identification with Emphasis on Non-Cancerous Diseases

In recent years, phage display technology has become vital in clinical research. It helps create antibodies that can specifically bind to complex antigens, which is crucial for identifying biomarkers and improving diagnostics and treatments. However, existing reviews often overlook its importance in areas outside cancer research. This review aims to fill that gap by explaining the basics of phage display and its applications in detecting and treating various non-cancerous diseases. We focus especially on its role in degenerative diseases, inflammatory and autoimmune diseases, and chronic non-communicable diseases, showing how it is changing the way we diagnose and treat illnesses. By highlighting important discoveries and future possibilities, we hope to emphasize the significance of phage display in modern healthcare.

Ixekizumab Demonstrates Rapid and Consistent Efficacy for Patients with Psoriatic Arthritis, Regardless of Psoriasis Severity

INTRODUCTION

Skin involvement in patients with psoriatic arthritis (PsA) worsens the severity and burden of disease. Ixekizumab (IXE), a selective interleukin (IL)-17A antagonist, was compared to placebo (PBO) in the SPIRIT-P1 (NCT01695239) and SPIRIT-P2 (NCT02349295) studies in patients with PsA and evidence of plaque psoriasis. This post hoc analysis reports musculoskeletal, skin, and nail outcomes through week 24 in patients from SPIRIT-P1 and SPIRIT-P2, stratified by mild, moderate, or psoriasis at baseline.

METHODS

This post hoc analysis pooled patients from SPIRIT-P1 and SPIRIT-P2 who were randomly assigned to PBO or IXE 80 mg every 4 weeks (Q4W) or every 2 weeks (Q2W). Efficacy outcomes were analyzed through week 24 by baseline psoriasis severity, defined by percent body surface area (BSA) affected; mild = BSA < 3%, moderate = 3% ≤ BSA ≤ 10%, severe = BSA > 10%. The primary outcomes assessed were the proportion of patients achieving American College of Rheumatology (ACR)20, ACR50, and ACR70 responses. Secondary outcomes included musculoskeletal, disease activity, skin and nail, and health-related quality-of-life measures.

RESULTS

Similar proportions of patients achieved ACR20/ACR50/ACR70 over time across all severity subgroups and treatment arms. More than one-third of IXE-treated patients achieved ACR20 at week 4, or ACR50 at week 24, with no significant differences according to psoriasis severity at baseline. Disease activity outcomes were similar through week 24 with both IXEQ4W and IXEQ2W, regardless of psoriasis severity at baseline. There were no significant differences over 24 weeks in the proportions of IXE-treated patients with mild, moderate, or severe baseline psoriasis who achieved Minimal Disease Activity (MDA). Across all severity subgroups, IXE demonstrated Psoriasis Area Severity Index 100 response as early as week 4, and approximately one-third of IXE-treated patients achieved total skin clearance at week 24.

CONCLUSION

IXE demonstrated rapid and consistent efficacy in joint, skin, and nail for patients with PsA, regardless of baseline psoriasis severity.

TRIAL REGISTRATION

SPIRIT-P1 (NCT01695239), SPIRIT-P2 (NCT02349295).

Exploring the Effects of Ixekizumab on Pain in Patients with Ankylosing Spondylitis Based on Objective Measures of Inflammation: Post Hoc Analysis from a Large Randomized Clinical Trial

INTRODUCTION

The objective of this analysis is to evaluate the improvement in spinal pain with ixekizumab, placebo, and adalimumab based on objective measures of inflammation response in patients with ankylosing spondylitis (AS).

METHODS

The COAST-V 52-week, double-blind, placebo-controlled, randomized phase III trial examined the efficacy of ixekizumab in patients with active AS; adalimumab was used as an active reference arm. Treatment effects on reduction in pain were assessed by objective measures of controlled and persisting inflammation (defined by magnetic resonance imaging [MRI], C-reactive protein [CRP], or MRI + CRP status). Pathway analysis was used to analyze treatment effect that was not attributable to reduction in inflammation biomarkers.

RESULTS

In patients with AS, when inflammation was controlled as assessed by MRI, patients treated with ixekizumab experienced a reduction in spinal pain at night (SP-N, numeric rating scale, ixekizumab mean = - 3.9, p < 0.001, adalimumab mean = - 2.6, p < 0.05) compared to placebo (mean =  - 1.6) at week 16. When inflammation was controlled as assessed by MRI + CRP, ixekizumab and adalimumab had numerically greater reductions at week 16 in SP-N versus placebo. All ixekizumab groups had further improvements at week 52. When inflammation was persisting as assessed by MRI + CRP, ixekizumab-treated patients had significant reduction in SP-N (mean = - 3.7, p < 0.001) versus placebo (mean = - 1.7), improvement with adalimumab did not reach significance (mean = - 2.6, p = 0.06). In the pathway analysis at week 16, ixekizumab had a greater effect on pain outcomes compared to adalimumab.

CONCLUSION

This post hoc analysis is supportive of the hypothesis that ixekizumab reduces pain in AS by additional mechanisms other than the reduction of measurable inflammation.

TRIAL REGISTRATION NUMBER

NCT02696785.

Evaluating the inhibition of IL-17A and TNFα in a cartilage explant model cultured with Th17-derived cytokines

Introduction

T-helper 17 (Th17) cells produce IL-17A playing a critical role in activating the pathogenic chain leading to joint tissue inflammation and destruction. Elevated levels of Th17 cells and IL-17A have been detected in skin lesions, blood, and synovial fluid from patients with psoriatic arthritis (PsA) and ankylosing spondylitis (AS). Moreover, IL-17A inhibitors suppress disease activity in psoriasis, PsA and AS, supporting the evidence of IL-17A contributing to the disease pathogenesis. Although, IL-17A inhibitors are widely approved, it remains unclear how the inhibitory effect of IL-17A alters the extracellular matrix (ECM) of the joint in a Th17-conditioned inflammatory milieu. Therefore, the aim of this study was to establish a cartilage model cultured with conditioned medium from Th17 cells and inhibitors to explore the effect of IL-17A inhibition on joint tissue remodeling.

Methods

Naïve CD4+ T cells from healthy human buffy coat were differentiated into Th17 cells, followed by Th17 cell activation to secrete Th17-related cytokines and molecules into media. The activated Th17 cells were isolated from the conditioned media (CM) and analyzed using flow cytometry to verify Th17 cell differentiation. The CM were assessed with ELISA to quantify the concentrations of cytokines secreted into the media by the Th17 cells. Healthy bovine cartilage explants were cultured with the Th17-CM and treated with IL-17A and TNFα inhibitors for 21 days. In harvested supernatant from the cartilage cultures, MMP- and ADAMTS-mediated biomarker fragments of type II collagen, aggrecan, and fibronectin were measured by ELISA to investigate the ECM remodeling within the cartilage tissue.

Results

Th17-CM stimulated a catabolic response in the cartilage. Markers of type II collagen and aggrecan degradation were upregulated, while anabolic marker of type II collagen formation remained on similar levels as the untreated explants. The addition of IL-17A inhibitor to Th17-CM decreased the elevated type II collagen and aggrecan degradation, however, degenerative levels were still elevated compared to untreated group. The addition of TNFα inhibitor completely reduced both type II collagen and aggrecan degradation compared to untreated explants. Moreover, the TNFα inhibitor treatment did not alter the type II collagen formation compared to untreated group.

Conclusion

This study suggests that inhibition of IL-17A in Th17-conditioned cartilage tissue only partially reduced the MMP-mediated type II collagen degradation and ADAMTS-mediated aggrecan degradation, while the TNFα inhibitor treatment fully reduced both MMP- and ADAMTS-mediated ECM degradation. This exploratory study where ECM biomarkers are combined with Th17-conditioned ex vivo model may hold great potential as output for describing joint disease mechanisms and predicting structural effects of treatment on joint tissue.

Residual Disease Activity in Canadian Patients With Psoriatic Arthritis Treated With Advanced Therapies: Results From a Multiregistry Analysis (UNISON-PsA)

OBJECTIVE

Although patient outcomes in psoriatic arthritis (PsA) have improved with the advent of advanced therapies, there remains a high unmet need to treat residual disease activity. The objective of the current study was to quantify residual disease activity and burden of disease in Canadian patients with PsA.

METHODS

This was a multiregion, observational, retrospective analysis of patient data extracted from the Rhumadata and the International Psoriasis and Arthritis Research Team (IPART) registries, analyzing deidentified data from patients who had initiated advanced therapy for the treatment of PsA between January 2010 and December 2019. The primary endpoint was the proportion of patients failing to achieve minimal disease activity (MDA) within 6 months; secondary endpoints included clinical and patient-reported burden of disease. Descriptive statistics included summaries by region, treatment class, and number of prior advanced therapies.

RESULTS

One thousand five hundred ninety-six patients were included. The proportions of patients who failed to achieve MDA within 6 months of an advanced therapy were 64.8% in Ontario, 68.3% in Western Canada, 74.8% in Quebec, and 75% in the Atlantic/East region. Failure to achieve MDA was higher among patients receiving an IL-17i compared with a TNFi in all regions except the Atlantic/East. Between 73.2% and 78.6% of patients reported pain at 6 months, and continuing functional impairment varied from 24% in the West to 83.3% in the Atlantic/East.

CONCLUSION

There is substantial burden and unmet need for improved therapies for Canadians with PsA. There is a wide regional variation in outcomes that requires further assessment.

Risk of infections in psoriatic arthritis or axial spondyloarthritis patients treated with targeted therapies: A meta-analysis of randomized controlled trials

OBJECTIVE

To evaluate the risk of global infections in patients with psoriatic arthritis (PsA) and axial spondyloarthritis encompassing ankylosing spondylitis (AS) and non-radiographic axial spondyloarthritis (nr-axSpA) treated with targeted therapies.

METHODS

Medline and Cochrane databases were systematically searched up to March 2021 for randomized controlled trials (RCTs) performed in patients with PsA or axial spondyloarthritis treated with biologic or targeted synthetic disease-modifying anti-rheumatic drugs (b/tsDMARDs). Global infections (any infections reported, including bacterial, viral and fungal infections, except serious infections) were the primary outcome. Secondary outcomes included serious infections defined as life-threatening infections or any infection requiring intravenous antibiotics or hospitalization. The relative risk of infections was determined by meta-analysis of RCTs.

RESULTS

A total of 60 RCTs were included (20,418 patients), encompassing 17 b/tsDMARDs, compared with placebo, conventional synthetic drugs (csDMARDs) or non-steroidal anti-inflammatory drugs (NSAIDs). An increased risk of any infection for patients exposed to these drugs was found (RR 1.15, 95% CI [1.06-1.25]), mainly with high doses and longer duration of treatment. Most infections were respiratory tract or ear, nose, and throat (ENT) infections. Subgroup analyses showed a statistically significant increased risk of infections for axial spondyloarthritis patients (RR 1.32, 95% CI [1.14-1.52]), but not for PsA patients (RR 1.05, 95% CI [0.97-1.14]). Infection risk was highest with TNF inhibitors (RR 1.23, 95% CI [1.11-1.37]) and IL-17 inhibitors (RR 1.30, 95% CI [1.07-1.59]). No increased risk of serious infections was shown.

CONCLUSION

In contrast to serious infections, the risk of global infections is moderately increased with b/tsDMARDs in spondyloarthritis, and is associated in particular with use of TNF and IL-17 inhibitors.

Assessing Comparative Efficacy of Biologics for the Treatment of Psoriasis With Nail Involvement: A Systematic Review

Background

Despite recent advances in biologics, there is a lack of significant evidence regarding the comparative efficacy of biologics in treating more resistant features of psoriasis, namely nail psoriasis. A systematic review synthesizing data from multiple studies is efficacious in assessing the comparative efficacy among biologics for the treatment of nail psoriasis.

Objective

To evaluate and compare the efficacy of biologics for the treatment of nail psoriasis.

Methods

Utilizing PRISMA guidelines, a systematic literature review was conducted using the Pubmed database on November 16, 2022. Studies selected were phase 3 or 4 randomized clinical trials, clinical studies, or other randomized trials with data on the treatment with biologics for adults with nail psoriasis.

Results

Sixteen studies meeting inclusion criteria were included for analysis. At 24 weeks, the highest mean NAPSI percent improvement achieved at week 24 was by brodalumab (76.9%) followed by etanercept (74%) and ixekizumab (70.5%) while the biologics achieving the greatest proportion of NAPSI 0 were adalimumab (44.6%) and ixekizumab (41%).

Conclusions

This study helps elucidate the comparative efficacy of biologics for the treatment of nail psoriasis. This review suggests that brodalumab and etanercept are associated with the highest percent improvement in nail psoriasis while adalimumab and ixekizumab are associated with the greatest probability of complete nail resolution.

Effects of secukinumab and ixekizumab on major adverse cardiovascular events in patients with psoriasis: a meta-analysis of randomized controlled trials

Introduction

The aims of this study is to analyze the risk of major adverse cardiovascular events (MACEs) in patients with psoriasis treated with secukinumab and ixekizumab.

Methodology

We systematically identified randomized controlled trials (RCTs) that focused on the treatment of psoriasis with secukinumab and ixekizumab by conducting computerized searches of PubMed, Embase, and the Cochrane Library databases, spanning from their inception to October 31st, 2022. The search terms used included psoriasis, secukinumab, ixekizumab, and randomized controlled trial. Two independent evaluators conducted literature screening, data extraction, and assessed the quality of included studies based on predetermined inclusion and exclusion criteria. The gather data was subjected to meta-analysis using the statistical software RevMan 5.4.

Results

A total of 20 articles, encompassing 23 randomized controlled trials involving 10,746 psoriasis patients were included in the analysis. During the double-blind treatment period, the meta-analysis results indicated the following: There was no significant difference in the incidence of MACEs between the secukinumab and placebo groups [RR = 0.61, 95% CI (0.26, 1.44), p = 0.26]. Similarly, there was no significant difference in the incidence of MACEs with ixekizumab compared to the placebo group [RR = 0.47, 95% CI (0.15, 1.47), p = 0.20]. Furthermore, no significant difference in the incidence of MACEs was observed between secukinumab 300 mg and secukinumab 150 mg treatment groups [RR = 1.00, 95% CI (0.23, 4.35), p = 1.00]. Likewise, there was no significant difference in the incidence of MACEs between the ixekizumab Q4W (every 4 weeks) and ixekizumab Q2W (every 2 weeks) administration groups [RR = 4.01, 95% CI (0.45, 35.89), p = 0.21].

Conclusion

The findings of this study suggest that neither secukinumab nor ixekizumab is significantly associated with the risk of MACEs in patients with psoriasis during double-blind treatment.Systematic review registration: Unique Identifier: CRD42022373756 https://www.crd.york.ac.uk/.

Long-term safety of Ixekizumab in adults with psoriasis, psoriatic arthritis, or axial spondyloarthritis: a post-hoc analysis of final safety data from 25 randomized clinical trials

BACKGROUND

We report long-term, end-of-study program safety outcomes from 25 randomized clinical trials (RCTs) in adult patients with psoriasis (PsO), psoriatic arthritis (PsA), or axial spondyloarthritis (axSpA) [including ankylosing spondylitis (AS) and non-radiographic axial spondyloarthritis (nr-axSpA)] who received ≥ 1 dose of Ixekizumab (IXE) over 5 years (PsO) or up to 3 years (PsA, axSpA).

METHODS

This integrated safety analysis consists of data from patients who received any dose of IXE, across 25 RCTs (17 PsO, 4 PsA, 4 axSpA). Rates of treatment-emergent adverse events (TEAEs), serious adverse events (SAEs) and selected adverse events (AEs) of interest were analyzed for all pooled studies by years of therapy and overall, through March 2022. Results were reported as exposure-adjusted incidence rates (IRs) per 100 patient-years (PY) overall and at successive year intervals.

RESULTS

Six thousand eight hundred ninety two adult patients with PsO, 1401 with PsA, and 932 with axSpA (including AS and nr-axSpA), with a cumulative IXE exposure of 22,371.1 PY were included. The most commonly reported TEAE across indications was nasopharyngitis (IRs per 100 PY: 8.8 (PsO), 9.0 (PsA), 8.4 (axSpA)). SAEs were reported by 969 patients with PsO (IR 5.4), 134 patients with PsA (IR 6.0), and 101 patients with axSpA (IR 4.8). Forty-five deaths were reported (PsO, n = 36, IR 0.2; PsA, n = 6, IR 0.3; axSpA, n = 3, IR 0.1). TEAEs did not increase during IXE exposure: IRs per 100 PY, PsO: 88.9 to 63.2 (year 0-1 to 4-5), PsA: 87 to 67.3 (year 0-1 to 2-3), axSpA: 82.1 to 55.4 (year 0-1 to >  = 2). IRs per 100 PY of discontinuation from IXE due to AE were 2.9 (PsO), 5.1 (PsA), and 3.1 (axSpA). IRs per 100 PY of injection site reactions were 5.9 (PsO), 11.6 (PsA) and 7.4 (axSpA); Candida: 1.9 (PsO), 2.0 (PsA), and 1.2 (axSpA); depression, major adverse cerebro-cardiovascular events and malignancies: ≤ 1.6 across all indications. Adjudicated IRs per 100 PY of inflammatory bowel disease were ≤ 0.8 across indications (0.1 [PsO]; 0.1 [PsA]; 0.8 [axSpA]).

CONCLUSIONS

In this integrated safety analysis, consisting of over 22,000 PY of exposure, the long-term safety profile of IXE was found to be consistent with previous, earlier reports, with no new safety signals identified.

TRIAL REGISTRATION

NCT registration numbers for RCTs included in this integrated analysis can be found in Additional File 1.

Bimekizumab for the treatment of psoriatic arthritis

INTRODUCTION

Interleukin (IL)-17A and IL-17F have overlapping roles in pro-inflammatory signaling and have been implicated in the pathogenesis of psoriatic disease. Bimekizumab is the first human monoclonal antibody to selectively inhibit IL-17F in addition to IL-17A. Bimekizumab has been studied in several phase II/III trials and has been approved for the treatment of patients with psoriatic arthritis (PsA) in the EU and UK.

AREAS COVERED

A literature search identified clinical trials examining the efficacy and safety of bimekizumab for PsA, which were critically appraised.

EXPERT OPINION

Clinical trials of bimekizumab in PsA have demonstrated rapid and sustained treatment responses and depth of response across the multiple disease domains. High levels of efficacy were sustained to 152 weeks in phase IIb trials, and to 52 weeks in phase III trials. Bimekizumab was generally well tolerated. As expected, due to the role of IL-17 in the immune response to fungal pathogens, there was an increase in mild-to-moderate, localized fungal infections with bimekizumab treatment, very few of which led to discontinuation. Studies over longer time periods, with relevant comparators from the IL-17A inhibitor class, and real-world data will be important to further define the role of bimekizumab among currently available treatments for PsA. [Figure: see text].

Difficult-to-treat psoriatic arthritis (D2T PsA): a scoping literature review informing a GRAPPA research project

BACKGROUND

Psoriatic arthritis (PsA) is a multifaceted condition with a broad spectrum of manifestations and a range of associated comorbidities. A notable segment of patients with PsA remains resistant to even advanced therapeutic interventions. This resistance stems from myriad causes, including inflammatory and non-inflammatory factors.

OBJECTIVES

To collate and critically assess the various definitions and criteria of difficult-to-treat (D2T PsA present in the literature.

METHODS

Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines, we conducted a scoping review in July 2023, searching PubMed, American College of Rheumatology Convergence 2022, European Alliance of Associations for Rheumatology Congress 2023, Google Scholar and cited articles. Selection was made by two independent authors using Rayyan software, and conflicts were adjudicated by a third author. Eligibility criteria for PubMed focused on all article designs that were written in English, with full-text available, from the past decade, excluding only those not defining D2T PsA or targeting other populations.

RESULTS

From the 565 references sourced, 15 studies were analysed, revealing considerable variations in defining both 'active disease' and 'resistant PsA', which was most often termed 'D2T' PsA.

CONCLUSION

The definitions and criteria for D2T PsA and for 'active disease' are notably heterogeneous, with considerable variation across sources. The ongoing Group for Research and Assessment of Psoriasis and Psoriatic Arthritis initiative stands to bridge these definitional gaps and aims to provide guidance for clinicians and illuminate a path for pharmaceuticals and regulatory agencies to follow.

Ixekizumab for Active Radiographic Axial Spondyloarthritis in Chinese Patients: 16- and 52-Week Results from a Phase III, Randomized, Double-Blind, Placebo-Controlled Study

INTRODUCTION

Ixekizumab, an interleukin-17A inhibitor, was efficacious and well tolerated for the treatment of active radiographic axial spondyloarthritis (r-axSpA) in international clinical studies. This phase III study aimed to determine the efficacy and safety of ixekizumab for treating Chinese patients with active r-axSpA.

METHODS

Adults with active r-axSpA naïve to biologic disease-modifying antirheumatic drugs (bDMARDs), or with an inadequate response/intolerance to one tumor necrosis factor inhibitor, were randomized (1:1), double-blind, to receive ixekizumab 80 mg every 4 weeks (IXEQ4W; starting dose 160 mg), or placebo, for 16 weeks. Patients receiving placebo were then switched to IXEQ4W, and those receiving IXEQ4W continued, until week 52. The primary endpoint was the proportion of bDMARD-naïve patients achieving an Assessment of SpondyloArthritis International Society 40 (ASAS40) response at week 16.

RESULTS

In total, 147 patients were randomized to receive placebo (n = 73) or IXEQ4W (n = 74). At week 16, more bDMARD-naive patients achieved ASAS40 in the IXEQ4W group (n = 66; 40.9%) than the placebo group (n = 64, 7.8%; p < 0.001). In the overall study population, ASAS40 was also achieved by more patients in the IXEQ4W group (37.8%) than the placebo group (8.2%; p < 0.001) at week 16, with a significant difference observed as early as week 1. There were significant improvements in all key secondary endpoints at week 16 with IXEQ4W versus placebo. Efficacy was sustained at week 52 in patients who continued IXEQ4W and there were also clinical improvements from weeks 16 to 52 in patients switched to IXEQ4W. The safety profile of ixekizumab was consistent with that described previously. Infections and injection-site reactions were the most frequently reported events of special interest.

CONCLUSIONS

IXEQ4W was associated with rapid and significant improvements in the signs and symptoms of active r-axSpA in Chinese patients at week 16 that were sustained at week 52, with no new safety signals.

TRIAL REGISTRATION NUMBER

ClinicalTrials.gov identifier: NCT04285229.

Real-World Persistence and Treatment Patterns in Patients with Psoriatic Arthritis Treated with Anti-IL17 Therapy in Spain: The PerfIL-17 Study

INTRODUCTION

Given the growing interest and use of interleukin-17 inhibitors (anti-IL17) for the treatment of psoriatic arthritis (PsA), an observational study has been conducted to characterize the patient profile, treatment patterns, and persistence of ixekizumab or secukinumab in patients with PsA receiving them as first anti-IL17.

METHODS

This is a multicenter retrospective study, conducted at eight Spanish hospitals where data from adult patients with PsA were collected from electronic medical records. Three cohorts of patients, initiating treatment with an anti-IL17 [secukinumab 150 mg (SECU150), secukinumab 300 mg (SECU300), or ixekizumab (IXE)] between January 2019 and March 2021, were included. Demographic and clinical patient characteristics, treatment patterns, and persistence were analyzed descriptively. Continuous data were presented as mean [standard deviation (SD)] and categorical variables as frequencies with percentages. Persistence rates at 3, 6, and 12 months were calculated.

RESULTS

A total of 221 patients with PsA were included in the study [SECU150, 103 (46.6%); SECU300, 38 (17.2%); and IXE, 80 (36.2%)]. Treatment patterns differed by clinical characteristics: SECU150 was initiated more frequently in patients with moderate PsA and less peripheral joint involvement, while patients on SECU300 included those with a higher rate of enthesitis and active skin psoriasis, and patients on IXE showed a longer time since PsA diagnosis, more frequent comorbidities, joint involvement, and diagnosed skin psoriasis. Conventional synthetic disease-modifying anti-rheumatic drugs (csDMARDs) were previously administered in 88.2% of patients and biologic or targeted synthetic disease-modifying anti-rheumatic drugs (b/tsDMARDs) were administered in 72.9%. The mean number of previous b/tsDMARDs was 2.4 (SD 1.5) in the IXE cohort, 1.7 (SD 0.9) in the SECU300 cohort, and 1.6 (SD 1.0) for those in the SECU150 cohort. The global persistence on all anti-IL17 was 97.2%, 88.4%, and 81.0% at 3, 6, and 12 months, respectively. The most frequent reason for discontinuation across the three cohorts was lack of effectiveness (16.7%; 37/221).

CONCLUSIONS

Most of the patients with PsA treated with anti-IL17 in Spain had moderate to severe disease activity, high peripheral joint and skin involvement, and had received previous b/tsDMARDs. More than 80% of patients with a 1-year follow-up persisted on anti-IL17, with the highest rate observed in the IXE cohort, followed by the SECU150 then SECU300 cohorts.

Real-world evidence for ixekizumab in the treatment of psoriasis and psoriatic arthritis: literature review 2016-2021

OBJECTIVES

To describe the results of a structured literature review of real-world outcomes with ixekizumab in patients with psoriasis (PsO) and/or psoriatic arthritis (PsA).

METHODS

Literature databases, conference proceedings and additional sources were searched for relevant publications. Real-world studies of ≥25 ixekizumab-treated patients with PsO and/or PsA were included. Data on clinical effectiveness, treatment persistence/patterns, economic outcomes, patient-reported outcomes (PROs) and safety were extracted.

RESULTS

Fifty-one publications were included. Most studies focused on patients with PsO, and the number of publications with a focus on PROs was low. Studies of treatment patterns found that in general, ixekizumab had similar or better persistence versus other biologics, and rates or risk of switching similar to or less than comparator drugs. Adherence to ixekizumab was high, and patients were less likely to discontinue ixekizumab than other biologics. Ixekizumab was effective in the real world, with a safety profile consistent with that reported in clinical trials.

CONCLUSIONS

Real-world use of ixekizumab in PsO and PsA is effective and safe, with generally high treatment persistence and adherence. Further work is required to determine the impact of ixekizumab on PROs in PsO, and to gather more data on real-world use of ixekizumab in PsA.

Ixekizumab Efficacy in Patients with Severe Peripheral Psoriatic Arthritis: A Post Hoc Analysis of a Phase 3, Randomized, Double-Blind, Placebo-Controlled Study (SPIRIT-P1)

INTRODUCTION

The efficacy and safety of ixekizumab, an anti-interleukin-17A antibody, in patients with severe symptoms of psoriatic arthritis are largely unexplored. We report the efficacy and safety of ixekizumab in a post hoc analysis of the SPIRIT-P1 trial.

METHODS

Patients were treated with placebo, ixekizumab 80 mg every 2 weeks (Q2W) or 4 weeks (Q4W), or adalimumab 40 mg Q2W for 24 weeks. In this subgroup analysis of SPIRIT-P1, the population with severe psoriatic arthritis was defined using the modified composite psoriatic activity index total score > 7 and peripheral arthritis score = 3 (> 4 tender or swollen joint count and ≥ 0.5 Health Assessment Questionnaire-Disability Index). Efficacy was measured by joint and skin endpoints including disease progression.

RESULTS

In the severe population, significantly more patients (p ≤ 0.001) treated with ixekizumab than placebo achieved 20% improvement according to the American College of Rheumatology criteria (ACR 20): 63.3% for ixekizumab Q4W, 60.4% for ixekizumab Q2W, and 24.5% for placebo. Statistically greater responses compared with placebo were observed in the severe population for ACR 50, ACR 70, ACR core set, disease activity index for psoriatic arthritis (DAPSA) low disease activity and DAPSA remission, and 28-joint disease activity score using C-reactive protein, as well as Psoriasis Area and Severity Index (PASI) 75, PASI 90, and PASI 100 (p ≤ 0.001). Efficacy findings and the safety profile of ixekizumab in the severe population were consistent with those of the overall population, with no new safety concerns identified.

CONCLUSIONS

In patients with severe psoriatic arthritis, 24 weeks of treatment with ixekizumab resulted in improvements in both joint and skin symptoms. The safety profile in the severe population was consistent with the established safety profile of ixekizumab.

TRIAL REGISTRATION

ClinicalTrials.gov identifier, NCT01695239.

A Systematic Review Evaluating the Effectiveness of Several Biological Therapies for the Treatment of Skin Psoriasis

Psoriasis is a chronic inflammatory skin illness that has the potential to manifest at any stage of life, it is most frequently observed in early adulthood. Biological drugs have significantly transformed the landscape of psoriasis treatment through the provision of focused therapy, which effectively mitigates inflammation and regulates the overproduction of skin cells. Notwithstanding the accessibility of these biological drugs, rigorous evaluations that juxtapose their safety and efficacy profiles are necessary. The objective of this study is to conduct a thorough investigation of the relative efficacy of these drugs in alleviating psoriasis symptoms and increasing the quality of life for patients by synthesizing the existing evidence. A comprehensive review was conducted to evaluate and compare the safety and effectiveness of different biochemical medicines utilized in the management of psoriasis. In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations, the review process was conducted among the available studies. A search was conducted across electronic databases, such as Web of Science, PubMed, and Embase, utilizing a combination of keywords and Mesh phrases pertaining to psoriasis, biological medications, and particular names of pharmaceuticals. In total, 475 studies were ascertained by the preliminary search of the database. After eliminating duplicate research, 358 distinct studies remained. After meticulous screening of titles and abstracts against the predefined inclusion criteria, 281 papers were deemed ineligible and thus excluded. For final inclusion, the whole texts of the remaining 77 studies were evaluated. Forty additional papers were removed during the full-text evaluation for a variety of reasons, including improper research design, or insufficient outcome data. Finally, 37 studies were included in this systematic review since they satisfied all inclusion criteria. The results of the current systematic review showed that all biological medications showed high efficacy in the treatment of skin psoriasis compared with placebo based on the clinical assessment outcomes using different tools such as PASI.

Sex-related differences in patient characteristics, and efficacy and safety of advanced therapies in randomised clinical trials in psoriatic arthritis: a systematic literature review and meta-analysis

BACKGROUND

Sex-related differences in clinical manifestations and disease outcomes exist in psoriatic arthritis, however, there is limited information on sex-related differences in randomised controlled trials of psoriatic arthritis. We aimed to compare patient characteristics and efficacy and safety of advanced therapies (including biological and targeted synthetic therapies) between male and female patients with psoriatic arthritis participating in randomised controlled trials.

METHODS

In this systematic review and meta-analysis, we searched Medline, Embase, and Central databases, and conference abstract archives, from their inception to June 10, 2022, for randomised controlled trials that assessed the efficacy of advanced therapies in psoriatic arthritis. Two reviewers extracted information on participants' characteristics and rates of American College of Rheumatology (ACR) 20 and ACR50 response and minimal disease activity (MDA) by sex. Random-effects models were used to calculate pooled effects of ACR20, ACR50, and MDA in male versus female patients by drug class.

FINDINGS

We included 54 trials (11 514 [50·9%] of 22 621 participants were female and 11 107 [49·1%] were male). Sex-disaggregated results were reported in a minority of studies (nine [17%] of 54 reported baseline characteristics by sex, 18 [33%] reported efficacy by sex, and two [4%] reported safety endpoints by sex). At baseline, male patients had lower baseline tender joint count (mean difference -3·01 [95% CI -3·83 to -2·18], health assessment questionnaire scores (-0·28 [-0·33 to -0·24]), pain scores (-4·58 [-6·86 to -2·30]), patient global assessment (-3·22 [-5·27 to -1·17]), and physician global assessment (-1·34 [-2·08 to -0·08]) than did female patients. Male patients had higher baseline psoriasis area and severity index scores (mean difference 1·95 [95% CI 0·78 to 3·11]) and C-reactive protein concentrations (2·57 [0·40 to 4·74]) than did female patients. ACR20 response by sex varied across drug classes, with higher rates in males than females with interleukin (IL)-17 inhibitors (odds ratio [OR] 1·70 [95% CI 1·38-2·11]), IL-23 inhibitor (1·46 [1·20-1·78]), IL-12 and IL-23 inhibitor (2·67 [1·39-5·09]), and tumour necrosis factor (TNF) inhibitors (1·55 [1·11-2·18]), but no difference with JAK and TYK2 inhibitors (1·10 [0·87-1·38]). Similarly, ACR50 response rates were higher in male patients versus female patients in all drug classes, with exception of JAK and TYK2 inhibitors (TNF inhibitors, OR 2·17 [95% CI 1·62-2·90]; IL-17 inhibitors, 1·93 [1·56-2·38]; IL-23 inhibitor, 1·71 [1·25-2·34]; IL-12 and 23 inhibitor, 2·43 [1·14-5·20]; and JAK and TYK2 inhibitors, 1·09 [0·73-1·62]). Male patients were more likely to reach MDA with most drug classes, including IL-17 inhibitors (OR 1·99 [95% CI 1·50-2·63]), IL-23 inhibitors (1·79 [1·29-2·50]), TNF inhibitors (2·62 [1·54-4·44]), and JAK and TYK2 inhibitors (1·77 [1·15-2·73]). Risk of bias was low for most studies.

INTERPRETATION

Biological sex of patients with psoriatic arthritis influences their response to advanced therapies, but the effect varies by drug class. Selective reporting might have influenced these results. Future trials should report baseline characteristics and endpoint results by sex.

FUNDING

Canadian Rheumatology Association.

Short-term risk and long-term incidence rate of infection and malignancy with IL-17 and IL-23 inhibitors in adult patients with psoriasis and psoriatic arthritis: a systematic review and meta-analysis

The risk of infection and malignancy may be a concern for patients with psoriasis receiving interleukin (IL)-17 and IL-23 inhibitors, particularly with long-term treatments. We aimed to estimate the short-term risks and long-term incidence rates of infection and malignancy with IL-17 or IL-23 antagonists in adult patients with psoriasis and psoriatic arthritis through this comprehensive meta-analysis (PROSPERO registration number: CRD42022363127). We searched PubMed, MEDLINE, Web of Science and ClinicalTrials.gov until May 17, 2023 for randomized placebo-controlled trials and long-term (≥ 52 weeks) open-label extension studies. The estimates of short-term risk ratios (RRs) and long-term exposure-adjusted incidence rates (EAIRs) were pooled using R software 4.1.1 and STATA 16.0. This review included 45 randomized placebo-controlled studies and 27 open-label extension studies. Short-term RRs of serious infection, overall infection and malignancy were 1.45 (95% confidence intervals, 95% CI: 0.81-2.59), 1.20 (95% CI: 1.06-1.35), 0.83 (95% CI: 0.41-1.71) with IL-17 inhibitors; and 0.68 (95% CI: 0.38-1.22), 1.13 (95% CI: 1.00-1.28), 0.87 (95% CI: 0.37-2.04) with IL-23 inhibitors. Increased short-term risks of nasopharyngitis and Candida infection with IL-17 inhibitors were found. Long-term EAIRs of serious infection, overall infection, nonmelanoma skin cancer (NMSC), malignancies excluding NMSC, nasopharyngitis and upper respiratory tract infection were 1.11/100 patient-years (PYs), 57.78/100PYs, 0.47/100PYs, 0.24/100PYs, 15.07/100PYs, 8.52/100PYs, 3.41/100PYs with IL-17 inhibitors; and 1.09/100PYs, 48.50/100PYs, 0.40/100PYs, 0.43/100PYs, 10.75/100PYs, 5.84/100PYs with IL-23 inhibitors. Long-term EAIR of Candida infection was 3.41/100PYs with IL-17 inhibitors. No active or reactivated tuberculosis was ever reported in all the trials, and only a few cases of latent tuberculosis, hepatitis, and herpes zoster were reported during the long-term extension periods. No evidence of increased EAIRs of infection and malignancy with longer durations was found. Our study suggested that short-term risk and long-term incidence of infections and malignancies in psoriasis patients receiving IL-17 inhibitors and IL-23 inhibitors are generally low. However, close monitoring is required for nasopharyngitis and Candida infection with IL-17 inhibitors.

Systematic Review Registration

https://www.crd.york.ac.uk/PROSPERO/, identifier CRD42022363127.

Systematic literature review and network meta-analysis of therapies for psoriatic arthritis on patient-reported outcomes

OBJECTIVES

Head-to-head clinical trials are common in psoriasis, but scarce in psoriatic arthritis (PsA), making treatment comparisons between therapeutic classes difficult. This study describes the relative effectiveness of targeted synthetic (ts) and biologic (b) disease-modifying antirheumatic drugs (DMARDs) on patient-reported outcomes (PROs) through network meta-analysis (NMA).

DESIGN

A systematic literature review (SLR) was conducted in January 2020. Bayesian NMAs were conducted to compare treatments on Health Assessment Questionnaire Disability Index (HAQ-DI) and 36-item Short Form (SF-36) Health Survey including Mental Component Summary (MCS) and Physical Component Summary (PCS) scores.

DATA SOURCES

Ovid MEDLINE (including Epub Ahead of Print, In-Process & Other Non-Indexed Citations and Daily),Embase and Cochrane Central Register of Controlled Trials.

ELIGIBILITY CRITERIA

Phase III randomised controlled trials (RCTs) evaluating patients with PsA receiving tsDMARDS, bDMARDs or placebo were included in the SLR; there was no restriction on outcomes.

DATA EXTRACTION AND SYNTHESIS

Two independent researchers reviewed all citations. Data for studies meeting all inclusion criteria were extracted into a standardised Excel-based form by one reviewer and validated by a second reviewer. A third reviewer was consulted to resolve any discrepancies, as necessary. Risk of bias was assessed using the The National Institute for Health and Care Excellence clinical effectiveness quality assessment checklist.

RESULTS

In total, 26 RCTs were included. For HAQ-DI, SF-36 PCS and SF-36 MCS scores, intravenous tumour necrosis factor (TNF) alpha inhibitors generally ranked higher than most other classes of therapies available to treat patients with PsA. For almost all outcomes, several interleukin (IL)-23, IL-17A, subcutaneous TNF and IL-12/23 agents offered comparable improvement, while cytotoxic T-lymphocyte-associated antigen 4, phosphodiesterase-4 and Janus kinase inhibitors often had the lowest efficacy.

CONCLUSIONS

While intravenous TNFs may provide some improvements in PROs relative to several other tsDMARDs and bDMARDs for the treatment of patients with PsA, differences between classes of therapies across outcomes were small.

Comparative short-term risks of infection and serious infection in patients receiving biologic and small-molecule therapies for psoriasis and psoriatic arthritis: a systemic review and network meta-analysis of randomized controlled trials

Background

Infection events are a major concern for patients and physicians when making psoriasis treatment decisions.

Objective

To estimate the relative short-term risks of infection and serious infection for biologic and small molecule therapies in the treatment of moderate-to-severe plaque psoriasis (PsO) and psoriatic arthritis (PsA).

Data Sources and Methods

A systematic literature search of the PubMed, EMBASE, and Web of Science databases was conducted on 17 June 2022. We included phase II, III, or IV randomized controlled trials (RCTs) of biologic and small-molecule therapies that are licensed or likely to gain approval soon for PsO and PsA, as well as infection data reports. Two investigators independently extracted the data based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Network meta-analysis (NMA) was performed to estimate the pooled relative risks (RRs) and corresponding 95% confidence intervals of total infections and serious infections for treatments during placebo-controlled phases of RCTs. The surface under the cumulative ranking area (SUCRA) was calculated to rank the infection risk for each treatment.

Results

A total of 94 RCTs with a total of 19 treatment arms involving 54,369 participants were analyzed. For patients with PsO, bimekizumab, secukizumab, risankizumab, ustekinumab, apremilast, guselkumab, and adalimumab were associated with significantly higher risks of infection than placebo; SUCRA ranked infliximab, deucravacitinib, and bimekizumab with the highest risks of infection. For patients with PsA, bimekizumab, apremilast, and upadacitinib (30 mg daily) were associated with higher risks of infection; SUCRA ranked bimekizumab with the highest risk of infection. No treatments, except for upadacitinib (30 mg daily), were associated with a higher risk of serious infection than placebo in PsA.

Conclusion

This NMA provides a comprehensive assessment of the comparative short-term risks of infection, which could help physicians and patients to select individualized treatments for psoriasis.

Registration

CRD42022359873.

Unintentional unblinding in rheumatic disease trials

The practice of blinding treatment assignment in randomised controlled trials mitigates important biases in observational studies. Unblinding, whereby study participants or investigators become aware of treatment assignments, is an important threat to the validity of trial results. Rheumatology studies might be particularly susceptible to unblinding because rheumatic disease therapies often cause high rates of idiosyncratic side-effects and frequently rely on subjective endpoints. Despite this susceptibility, the degree to which unblinding occurs in randomised controlled trials in rheumatic diseases has rarely been assessed during trials or acknowledged as a limitation. Rheumatologists should be aware of this important threat to the validity of trial results, assessments of unblinding should be undertaken, and strategies to prevent unblinding should be deployed when feasible.

A Comprehensive Review of Ixekizumab Efficacy in Nail Psoriasis from Clinical Trials for Moderate-to-Severe Psoriasis and Psoriatic Arthritis

Nail psoriasis is a difficult-to-treat manifestation of psoriatic disease affecting up to 80% of patients with psoriatic arthritis (PsA) and 40-60% of patients with plaque psoriasis (PsO). Ixekizumab (IXE), a high-affinity monoclonal antibody that selectively targets interleukin-17A, is approved for the treatment of patients with PsA and patients with moderate-to-severe PsO. This narrative review aims to summarize nail psoriasis data generated from IXE clinical trials in patients with PsA (SPIRIT-P1, SPIRIT-P2, and SPIRIT-H2H) and/or moderate-to-severe PsO (UNCOVER-1, -2, -3, IXORA-R, IXORA-S, and IXORA-PEDS) with an emphasis on head-to-head clinical trial data. Across numerous trials explored, IXE treatment was associated with greater improvement in resolution of nail disease versus comparators at week 24, results which were maintained up to and beyond week 52. Additionally, patients experienced higher rates of resolution of nail disease versus comparators at week 24 and maintained high levels of resolution up to week 52 and beyond. In both PsA and PsO, IXE demonstrated efficacy in treating nail psoriasis, and therefore may be an effective therapy option. Trial Registration: ClinicalTrials.gov identifier UNCOVER-1 (NCT01474512), UNCOVER-2 (NCT01597245), UNCOVER-3 (NCT01646177), IXORA-PEDS (NCT03073200), IXORA-S (NCT02561806), IXORA-R (NCT03573323), SPIRIT-P1 (NCT01695239), SPIRIT-P2 (NCT02349295), SPIRIT-H2H (NCT03151551).

Efficacy and Safety of Nail Psoriasis Targeted Therapies: A Systematic Review

INTRODUCTION

Nail changes are frequent clinical findings in patients with cutaneous psoriasis and psoriatic arthritis, often causing significant impairments in quality of life. Numerous targeted therapies have been previously studied for treatment of nail psoriasis, however, newer agents have not been captured in prior systematic reviews. With over 25 new studies published since 2020, the landscape of nail psoriasis systemic treatments is rapidly evolving, warranting analysis of recently approved therapies.

METHODS

An updated systematic review of all PubMed and OVID database studies assessing efficacy and safety of targeted therapies for nail psoriasis was performed, with the goal of incorporating clinical data of recent trials and newer agents, namely brodalumab, risankizumab, and tildrakizumab. Eligibility criteria included clinical human studies reporting at least one of the nail psoriasis clinical appearance outcomes (Nail Psoriasis Severity Index, modified Nail Psoriasis Severity Index).

RESULTS

A total of 68 studies on 15 nail psoriasis targeted therapeutic agents were included. Biological agents and small molecule inhibitors included TNF-alpha inhibitors (adalimumab, infliximab, etanercept, certolizumab, golimumab), IL-17 inhibitors (ixekizumab, brodalumab, secukinumab), IL-12/23 inhibitors (ustekinumab), IL-23 inhibitors (guselkumab, risankizumab, tildrakizumab), PDE-4 inhibitors (apremilast), and JAK inhibitors (tofacitinib). These agents all demonstrated statistically significant improvements in nail outcome scores, compared with placebo or with baseline values, at weeks 10-16 and weeks 20-26, with some studies assessing efficacy up to week 60. Safety data for these agents were acceptable and consistent with known safety profiles within these timepoints, with nasopharyngitis, upper respiratory tract infections, injection site reactions, headache, and diarrhea being the most reported adverse events. Specifically, the newer agents, brodalumab, risankizumab, and tildrakizumab, showed promising outcomes for treatment of nail psoriasis on the basis of current data.

CONCLUSION

Numerous targeted therapies have shown significant efficacy in improving nail findings in patients with psoriasis and psoriatic arthritis. Data from head-to-head trials have shown greater efficacy of ixekizumab over adalimumab and ustekinumab, as well as brodalumab over ustekinumab, while prior meta-analyses have demonstrated superiority of ixekizumab and tofacitinib to other included agents at various assessed timepoints. Further studies on the long-term efficacy and safety of these agents, as well as randomized controlled trials involving comparison with placebo arms, are needed to fully analyze differences in efficacy of newer agents compared with previously established therapies.

Pharmacologic Treatment Strategies in Psoriatic Arthritis

PURPOSE

The goal of this narrative review was to provide current data on psoriatic arthritis (PsA) therapeutic strategies, supporting treatment decisions with a domain-based approach.

METHODS

This narrative review of treatment strategies for PsA focused on several disease domains (ie, peripheral arthritis, enthesitis, axial disease, dactylitis, skin and nail disease), as well as the so-called "related conditions" of uveitis, Crohn's disease, and ulcerative colitis. We searched PubMed, EMBASE, international guidelines, and recent congress abstracts.

FINDINGS

Currently, multiple approved treatment options offer a wide range of options, such as tumor necrosis factor (TNF) inhibitors; inhibitors of interleukin-17 (IL-17), IL-12/23 (IL-12/23), IL-23 (IL-23), and Janus kinase; the phosphodiesterase 4 inhibitor apremilast; and the T-cell modulator abatacept. However, no treatment option shows clear superiority concerning efficacy on peripheral arthritis and dactylitis over the others, whereas limited evidence suggests that the IL-17 inhibitor ixekizumab and the IL-12/23 inhibitor ustekinumab may be superior to TNF inhibitors in treating enthesitis. Recent data on enthesitis have also shown promising results for methotrexate. Treatment of axial PsA is mostly derived from axial spondyloarthritis, and more data are needed focusing on this specific subgroup of PsA patients. Thus far, the most important finding from the only randomized controlled trial in this specific population is that the IL-17 inhibitor secukinumab was superior to placebo in terms of clinical and radiologic end-points in axial PsA. Regarding psoriatic skin involvement, head-to-head trials in PsA as well as skin psoriasis showed the superiority of IL-17, IL-23, and IL-12/23 inhibitors over TNF inhibitors. When treating PsA with concurrent uveitis, according to the existing data, monoclonal TNF inhibitor antibodies should be preferred. In PsA and concomitant inflammatory bowel disease, treatment decisions must include the consideration of which specific type of inflammatory bowel disease (Crohn's disease or ulcerative colitis) is present, as some of the agents either lack data or are ineffective in treating these 2 conditions. In both types, IL-17 inhibitors should be avoided. When determining treatment strategy, comorbidities should be carefully assessed, and the corresponding risk profile of the respective treatment modalities should be taken into consideration.

IMPLICATIONS

There are many approved therapeutic options for treating patients with PsA, and additional emerging treatment options are in the pipeline. Individualized treatment decisions for each patient, depending on the leading disease phenotype, underlying comorbidities, and patient preferences, should be made based on shared decision-making.

The effect of ixekizumab on axial manifestations in patients with psoriatic arthritis from two phase III clinical trials: SPIRIT-P1 and SPIRIT-P2

Background

Psoriatic arthritis (PsA) is a chronic inflammatory condition predominantly affecting the peripheral joints. However, some patients with PsA can experience axial involvement which is manifested with back pain and associated with increased burden of illness.

Objectives

The aim of this post hoc analysis was to determine the efficacy of ixekizumab (IXE) up to 52 weeks in reducing axial symptoms in PsA patients, presenting with axial manifestations.

Design

This was a post hoc analysis of two pooled phase III clinical trials.

Methods

Patients with axial manifestations, from two placebo-controlled, randomized, double-blind, phase III trials (SPIRIT-P1 and SPIRIT-P2), were defined as Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) Question 2 (Q2; back pain)] total score ⩾4 and average of BASDAI Q5 + Q6 (morning stiffness) ⩾4 at baseline. For this post hoc analysis, the efficacy of IXE was evaluated at weeks 16, 24, and 52 using separate BASDAI questions (including back pain and morning stiffness), total BASDAI and modified BASDAI (mBASDAI; without Q3), Ankylosing Spondylitis Disease Activity Score (ASDAS), and 50% improvement in BASDAI (BASDAI50) response. Treatment comparisons were performed using logistic regression and analysis of covariance model for categorical and continuous end points, respectively.

Results

In the post hoc analysis among PsA patients with axial manifestations at baseline (N = 313), improvements in back pain and morning stiffness at weeks 16 and 24 were significantly greater in patients receiving IXE versus placebo (both p < 0.001). Improvements in BASDAI individual scores and total scores, mBASDAI, and ASDAS were significantly greater in patients receiving IXE compared with placebo. Similarly, significantly more IXE-treated patients achieved BASDAI50 at weeks 16 and 24 versus placebo. The effect of IXE was sustained at week 52. Similar effects were observed in sensitivity analyses subgroups.

Conclusion

IXE is effective in improving axial symptoms in patients with active PsA presenting with axial manifestations.

Effect of guselkumab on serum biomarkers in patients with active psoriatic arthritis and inadequate response to tumor necrosis factor inhibitors: results from the COSMOS phase 3b study

BACKGROUND

Guselkumab is a selective interleukin (IL)-23 inhibitor targeting the IL-23p19 subunit. In the phase 3b COSMOS trial, guselkumab demonstrated efficacy in treating participants with active psoriatic arthritis (PsA) and inadequate response (IR; lack of efficacy or intolerance) to tumor necrosis factor inhibitors (TNFi).

METHODS

Adults with active PsA (≥ 3 swollen joints,  ≥ 3 tender joints) and IR to one or two TNFi (TNFi-IR) were randomized 2:1 to guselkumab at Weeks 0, 4, then every 8 weeks (Q8W) or placebo➔guselkumab Q8W at Week 24 with possible early escape at Week 16. Levels of serum cytokines, including interferon ɣ (IFNɣ), IL-10, and tumor necrosis factor α (TNFα); T helper 17 (Th17) effector cytokines IL-17A, IL-17F, and IL-22; and acute phase proteins C-reactive protein (CRP), IL-6, and serum amyloid A (SAA), were assessed and compared with matched healthy controls; guselkumab pharmacodynamics through Week 24 were also assessed. Associations between baseline biomarker levels and 1) baseline disease activity (28-joint disease activity score using CRP [DAS28-CRP], psoriasis area and severity index [PASI], and % body surface area [BSA] affected by psoriasis) and 2) clinical response (including  ≥ 20% improvement in American College of Rheumatology criteria [ACR20] response) at Week 24 were assessed.

RESULTS

Baseline serum levels of IL-6, IL-10, IL-17A, IL-17F, IL-22, TNFα, and IFNɣ were significantly higher in COSMOS TNFi-IR participants than in matched healthy controls. Baseline IL-6, CRP, and SAA levels were associated with baseline DAS28-CRP. IL-17A and IL-17F levels were associated with baseline PASI score and psoriasis BSA. Baseline swollen or tender joint counts did not associate with baseline biomarker levels. At Week 24, significant decreases from baseline in CRP, SAA, IL-17A, IL-17F, and IL-22 levels were seen in guselkumab, but not placebo-, treated participants. IL-17F and IL-22 levels at Week 24 in guselkumab-treated participants did not significantly differ from those of matched healthy controls. Guselkumab-treated participants achieving ACR20 response at Week 24 exhibited higher baseline IL-22 and IFNɣ levels versus nonresponders.

CONCLUSIONS

Results from COSMOS participants with active, TNFi-IR PsA suggest guselkumab reduces levels of effector cytokines associated with the IL-23/IL-17 pathway, including those associated with baseline arthritis and skin disease activity.

TRIAL REGISTRATION

ClinicalTrials.gov: NCT03796858.

Real-World Evidence Assessing Psoriatic Arthritis by Disease Domain: An Evaluation of the CorEvitas Psoriatic Arthritis/Spondyloarthritis Registry

OBJECTIVE

Real-world studies assessing treatment response by psoriatic arthritis (PsA) domains are limited. This study aimed to describe the patient characteristics, frequency and combinations of disease domains, disease activity, and patient-reported outcomes (PROs) by PsA domains in patients who initiated treatment with a tumor necrosis factor inhibitor (TNFi) or interleukin-17 inhibitor (IL-17i).

METHODS

Adults with PsA who initiated treatment with a TNFi or an IL-17i between January 2013 and January 2021 and had a 6 (±3)-month follow-up were included. The prevalence of PsA domains, the most common domain combinations, treatment persistence, and unadjusted change in disease activity and PROs from baseline to 6 months for each PsA domain were summarized descriptively.

RESULTS

Of the 1005 eligible patients, 63% were receiving TNFi and 37% were receiving IL-17i. Forty percent of TNFi and 14% of IL-17i initiators received these treatments as first-line therapy. Peripheral arthritis and skin disease were the most common PsA domains identified in 86% and 82% of patients, respectively, and the triad of peripheral arthritis, skin disease, and nail psoriasis was the most common domain combination observed in 14% of patients. More than two thirds (68%) of patients remained on therapy at 6 months' follow-up. Improvements in disease activity and PROs were observed across all PsA domains in those receiving TNFi or IL-17i.

CONCLUSION

This real-world analysis highlights the heterogeneity in domain presentation; therefore, assessing all PsA domains is important for optimal disease management. Improvements in outcomes across all PsA domains demonstrate the effectiveness of TNFi and IL-17i in diverse patient groups exhibiting different phenotypes of PsA.

Inflammatory Cytokines in Psoriatic Arthritis: Understanding Pathogenesis and Implications for Treatment

Psoriatic arthritis (PsA) is a persistent, inflammatory disease that affects individuals with psoriasis, arthritis, and enthesitis. Research has demonstrated that inflammatory cytokines such as tumor necrosis factor-alpha (TNF-α), interleukin-23 (IL-23), and interleukin-17 (IL-17) play a pivotal role in both the onset and progression of PsA. These cytokines are generated by activated immune cells and stimulate the attraction of inflammatory cells to the synovium and joint tissues, resulting in the deterioration of cartilage and bone. The blocking of these cytokines has become a successful treatment strategy for PsA, as biological drugs that inhibit TNF-α, IL-23, and IL-17 have demonstrated notable clinical benefits. The association between PsA and other types of inflammatory cytokines or chemokines, excluding TNF-α, IL-23, and IL-17, has been extensively investigated in numerous studies. These findings may provide a chance for the discovery of novel therapeutic agents targeting other molecules, distinct from the currently approved biologics and targeted synthetic disease-modifying anti-rheumatic drugs. In this review, we discuss the current understanding of the role of inflammatory cytokines in PsA pathogenesis and clinical implications of targeting these cytokines for PsA treatment.

Psoriatic disease and non-alcoholic fatty liver disease shared pathogenesis review

Psoriatic disease (PD) and non-alcoholic fatty liver disease (NAFLD) potentially share disease pathways given the numerous inflammatory pathways involved in both diseases and a higher prevalence of NAFLD in PD patients.  Metabolic syndrome and obesity are a key link between the two diseases, but even when controlling for this, associations between both diseases are still seen. Therapeutics that impact metabolic or inflammatory pathways may be impactful in both PD and NAFLD. In this review, we describe common inflammatory pathways contributing to both PD and NAFLD and critically review the potential impact of treatments for and on both diseases.

Targeted Therapies in Psoriatic Arthritis-An Update

Psoriatic arthritis (PsA) is a systemic inflammatory condition characterised by multiple clinical manifestations. Over the last decade, significant progress has been made in understanding the pathobiology of the disease. An expanded set of targeted therapies have emerged and have shown efficacy in PsA. Nevertheless, there is still a substantial subset of patients who experience no response or only a partial response to currently licensed therapies. The heterogeneous nature of the disease, together with a varying level of severity at presentation and disease activity during follow-up, brings tremendous challenges to devising management strategies. While there are certain pathophysiological similarities between PsA and rheumatoid arthritis (RA), it has become clear that there are discriminating features between these two conditions at the clinical, cellular, and molecular levels. However, there is a degree of overlap in the clinical approach when treating both PsA and RA, given that many biological and targeted therapies have proven efficacy for both pathologies. With an increasing understanding of the relevance of the IL-23/IL-17 axis in PsA, pharmacological agents blocking this pathway have provided promising possibilities for patients with PsA.

Guselkumab, a Selective Interleukin-23 p19 Subunit Inhibitor, Resolves Dactylitis in Patients With Active Psoriatic Arthritis: Pooled Results Through Week 52 From Two Phase 3 Studies

OBJECTIVE

Previous analyses of pooled DISCOVER-1 and DISCOVER-2 data through Week 24 showed significantly higher rates of dactylitis resolution in patients treated with guselkumab compared with placebo. Here, we investigate associations between dactylitis resolution and other outcomes through 1 year.

METHODS

Patients were randomized 1:1:1 to receive subcutaneous injections of guselkumab 100 mg at Week 0, Week 4, and then every 4 or 8 weeks, or placebo with crossover to guselkumab at Week 24. Independent assessors determined dactylitis severity score (DSS; 0-3/digit; total = 0-60). Dactylitis resolution (DSS = 0) (prespecified) and at least 20%, at least 50%, and at least 70% DSS improvement from baseline (post hoc) were determined through Week 52 (nonresponder imputation for treatment failure through Week 24 and for missing data through Week 52). ACR50, tender/swollen joints, low disease activity (LDA) as assessed by composite indices, and radiographic progression (DISCOVER-2 only) were assessed in patients with dactylitis versus without dactylitis resolution at Week 24 and Week 52.

RESULTS

Patients with dactylitis at baseline (473 of 1118) had more severe joint and skin disease than those without dactylitis (645 of 1118). At Week 52, approximately 75% of guselkumab-randomized patients with dactylitis at baseline had complete resolution; approximately 80% had at least 70% DSS improvement. Through Week 52, new-onset dactylitis (DSS ≥1) was uncommon among patients with a DSS of 0 at baseline. Guselkumab-randomized patients with dactylitis resolution were more likely to achieve ACR50, at least 50% reduction in tender and swollen joints, and LDA at Week 24 and Week 52 than those without resolution. At Week 52, patients with dactylitis resolution had numerically less radiographic progression from baseline (DISCOVER-2).

CONCLUSION

Through 1 year, approximately 75% of guselkumab-randomized patients had complete resolution of dactylitis; patients exhibiting resolution were more likely to achieve other important clinical outcomes. Given the high burden of dactylitis, resolution may be associated with better long-term patient outcomes.

Psoriatic Arthritis: Pathogenesis and Targeted Therapies

Psoriatic arthritis (PsA), a heterogeneous chronic inflammatory immune-mediated disease characterized by musculoskeletal inflammation (arthritis, enthesitis, spondylitis, and dactylitis), generally occurs in patients with psoriasis. PsA is also associated with uveitis and inflammatory bowel disease (Crohn's disease and ulcerative colitis). To capture these manifestations as well as the associated comorbidities, and to recognize their underlining common pathogenesis, the name of psoriatic disease was coined. The pathogenesis of PsA is complex and multifaceted, with an interplay of genetic predisposition, triggering environmental factors, and activation of the innate and adaptive immune system, although autoinflammation has also been implicated. Research has identified several immune-inflammatory pathways defined by cytokines (IL-23/IL-17, TNF), leading to the development of efficacious therapeutic targets. However, heterogeneous responses to these drugs occur in different patients and in the different tissues involved, resulting in a challenge to the global management of the disease. Therefore, more translational research is necessary in order to identify new targets and improve current disease outcomes. Hopefully, this may become a reality through the integration of different omics technologies that allow better understanding of the relevant cellular and molecular players of the different tissues and manifestations of the disease. In this narrative review, we aim to provide an updated overview of the pathophysiology, including the latest findings from multiomics studies, and to describe current targeted therapies.