Publication
Article
Author(s):
Over the past several years, an increased understanding of the pathophysiology of psoriasis and psoriatic arthritis has led to the development of several new biologic therapies.
Over the past several years, an increased understanding of the pathophysiology of psoriasis and psoriatic arthritis (PsA) has led to the development of several new biologic therapies. Appropriate treatment selection and timing may slow, and even halt, the progression of psoriasis and PsA; as a result, it can decrease the economic burden. As treatment options vary based on individual disease characteristics and patient preferences, reviewing the patient’s complete clinical picture is imperative. An updated treatment algorithm, based on patients’ most severe disease domain, is now available to guide the selection of optimal therapy. Special care should be given to patients with both psoriasis and PsA who experience multiple disease domains, a heavy symptom burden, and an increased risk of comorbidities.
Am J Manag Care. 2016;22:S225-S237
Overarching Principles of Psoriasis and Psoriatic Arthritis Treatment
Several best practices have emerged to guide the management of patients with psoriasis and psoriatic arthritis (PsA). The current goals for treatment include minimizing disease activity, maintaining functional status, improving quality of life, and preventing or minimizing both disease- and treatment-related complications. The optimal choice of therapy may depend on disease severity, prognostic factors, prior treatment, comorbidities,access to therapy, and patient preferences.Multidisciplinary assessment and management are critical to addressing each aspect of PsA care. In addition, frequent monitoring and treatment adjustments will be necessary to achieve and maintain disease control.1
Lifestyle Modifications
Smoking and obesity are examples of risk factors that exacerbate the signs and symptoms of psoriasis and/or PsA and contribute common comorbidities, such as cardiovascular disease.2 In addition, smoking can potentially reduce the effectiveness of anti-tumor necrosis factor-α (TNF-α) therapy.3 Nonpharmacologic interventions, such as smoking cessation, dietary advice, weight loss counseling and physical activity, are important components of comprehensive patient care.2 It is essential to diagnose signs or symptoms of psoriatic joint disease early to minimize, even prevent, joint destruction, as psoriatic joint disease usually takes 5 to 12 years to develop after the onset of skin psoriasis.4
Treat to Target
The treat-to-target (T2T) principle of PsA management involves close monitoring and frequent treatment adjustments designed to achieve early and tight control of inflammatory disease activity. In the TICOPA trial, 206 patients with newly diagnosed PsA were randomly assigned to tight control using a T2T strategy or assigned to usual care. In the T2T arm, patients started treatment with methotrexate (MTX) that was escalated to 25 mg after 6 weeks. If patients did not achieve minimal disease activity by week 12, combination disease-modifying antirheumatic drug (DMARD) therapy was started. After
another 12 weeks, patients with residual disease activity started anti-TNF therapy or switched to an alternate DMARD in combination with MTX. By comparison, patients receiving standard care were seen every 3 months by a rheumatologist but otherwise followed no set treatment protocol.5 After 48 weeks, 62% of patients in the T2T arm achieved a 20% improvement from baseline in the American College of Rheumatology response criteria (ACR20) compared with 45% of patients in the standard care group (odds ratio [OR], 1.91; P = .0392). Patients managed with the T2T strategy were also more likely than those in the standard care group to gain control of the skin manifestations of psoriasis (59% vs 33%), defined as a reduction of 75% or more from baseline in the Psoriasis Area and Severity Index score (PASI 75). Although the frequency of adverse events (AEs) increased in the tight control group relative to standard care, most patients tolerated treatment well. The most common AEs were nausea, liver function abnormalities, and respiratory tract infections. These findings support the T2T strategy to improve outcomes across multiple measures in patients with early PsA, including those with skin involvement.5
Comorbidity Management
Comorbidity screening and management are essential components of psoriasis and of PsA care. Several comorbidities occur with increased frequency in these patients including cardiovascular disease, diabetes, obesity, metabolic syndrome, osteoporosis, liver disease, and depression. Furthermore, patients with psoriasis and PsA are at an increased risk of exhibiting extra-articular manifestations of their underlying autoimmune disease, including inflammatory bowel disease and uveitis. Although the same comorbidity screening and management approaches apply to patients with psoriasis and PsA as to the general population, current guidelines stress the importance of identifying any comorbidities to provide optimal care for these patients.1
Treatment Options for Psoriasis and PsA
Multiple treatment options, ranging from local therapies (ie, topical medications and phototherapy) to nonbiologic systemic therapies (nonsteroidal anti-inflammatory drugs [NSAIDs] and traditional
DMARDs) and biologics, are available for patients with psoriasis and PsA. Most clinical studies regarding psoriasis evaluate monotherapy and exclude even potent topical steroids as adjunctive therapy, whereas the majority of patients enrolled in PsA clinical studies will receive maintenance MTX, NSAIDs, and systemic steroids from the outset. In many cases, combination therapy is recommended to enhance treatment efficacy and minimize AEs.1,6,7 For instance, combining biologic agents such as etanercept or adalimumab with MTX results in greater control of psoriasis disease activity than either
agent alone. For patients experiencing psoriasis flares, the use of short-term cyclosporine in combination with other systemic or biologic agents is an effective strategy for reducing disease activity Furthermore, the combined use of biologic therapy, especially etanercept and phototherapy, is more effective against psoriatic lesions than either modality used alone.6 Additional combination regimens are reviewed in the following discussion of psoriasis and PsA therapies.
Local Therapies
Topical Therapies
Topical medications are the first-line treatment option for the majority of patients with psoriasis who have limited disease, which is often defined as up to 5% of the body surface area (BSA). In addition, topical therapies continue to be used in adjunct with systemic therapies in patients with extensive disease (>5% BSA) who require more aggressive intervention. Options for topical treatment include emollients, topical corticosteroids, topical vitamin D analogs (eg, calcipotriene/calcipotriol, calcitriol, and tacalcitol), retinoids (eg, tazarotene), and calcineurin inhibitors (eg, topical tacrolimus 0.1% and
pimecrolimus 1%). In addition, a combination of a potent topical steroid and a vitamin D analogue in one preparation has shown to be effective. The amount of topical medication required to treat various BSA percentages can be gauged by the “fingertip unit” method, with 1 fingertip unit corresponding to approximately 2% BSA (Figure 17,8); this corresponds to approximately 500 mg.
Multiple factors influence the choice of topical therapy, including body site, thickness and scaling of the psoriasis lesions, patient age, costs, and patient preferences. Poor adherence to topical medications is a major barrier to successful psoriasis treatment, with up to 40% of patients with psoriasis reporting nonadherence due to inconvenience, time constraints, frustration with medication efficacy, unclear instructions, and fear of AEs.7 Therefore, the successful use of topical medications requires a particular emphasis on patient education and counseling.
Phototherapy
Ultraviolet (UV) irradiation controls psoriatic skin lesions by targeting hyperproliferative epidermal cells and T-cells.9 Phototherapy is recommended as first-line therapy for moderate to severe psoriasis when skin involvement is too extensive for topical therapy alone. In addition, phototherapy is an appropriate treatment strategy for patients with limited skin involvement, but debilitating symptoms, such as those with severe psoriasis of the palms, soles, and scalp. For patients with PsA, phototherapy is also used to manage the cutaneous manifestations of psoriatic disease.10 Phototherapy is also appropriate in patients with contraindications to systemic treatment, such as women who are pregnant.9 Multiple phototherapy regimens are currently used in the outpatient setting.9 Pretreatment with topical or oral photosensitizing agents, such as psoralen, enhances the cytotoxic effects of UVA therapy and further inhibits epidermal cell proliferation. Photochemotherapy with oral psoralen and UV-A radiation (PUVA) can lead to dramatic improvements in psoriatic skin lesions.11 However, PUVA is less tolerated than UV-B-based phototherapy, with an increased risk of nonmelanoma skin cancer after 200 treatments. Phototherapy is costeffective for controlling psoriatic skin lesions but is less convenient for patients because of travel time and costs associated with absence from work.9 Thus, several home phototherapy units are available and prescribed under the guidance of dermatologists.
Nonbiologic Systemic Therapies
NSAIDs
NSAIDs play a central role in reducing inflammation and discomfort, particularly in patients with PsA with prominent axial disease, enthesitis, and dactylitis.1
Conventional DMARDs
Traditional DMARDs, including MTX, sulfasalazine, leflunomide, and cyclosporine, are frequently used as first-line therapies for patients with PsA.12 In addition, these agents also form the backbone of many combination regimens for both skin and joints, such as MTX plus phototherapy for skin psoriasis, MTX plus biologic agents for skin and joints, or targeted small-molecule inhibitors. MTX is also the most commonly used systemic therapy worldwide for patients with moderate to severe psoriasis.13 Although highly effective as short-term monotherapy for skin psoriasis, cyclosporine is not nearly as effective for PsA. Conversely, neither sulfasalazine nor leflunomide, while helpful as adjunctive therapies for PsA, has an appreciable effect on skin psoriasis.14 Prior to initiating MTX, patients should be evaluated for potential drug—drug interactions (eg, MTX and sulfonamide-derived drugs), risk factors, and contraindications. Of note, MTX is absolutely contraindicated during pregnancy and breastfeeding. In the absence of contraindications, MTX is usually started at a dose of 10 to 15 mg/week and titrated to a maximum recommended dose of 25 mg/week. Although most patients begin treatment with oral MTX, parenteral administration is an option for patients who develop gastrointestinal intolerance, for those with an inadequate response to maximally titrated oral therapy, and in cases with high risk of nonadherence and/or dosing errors.13 In addition, MTX as monotherapy is highly effective in less than half of patients with psoriasis. The addition of oral folic acid (1-5 mg daily) is essential with MTX therapy to minimize adverse effects.
Biologic Therapies
The development of biologic therapies targeting key molecules involved in disease pathogenesis has revolutionized the treatment of moderate to severe psoriasis and PsA.15 Biologics can be classified as large molecules (eg, monoclonal antibodies), which must be given by injection or infusion, and small molecules, which are given orally.16 The contraindications, precautions, and
common AEs of each treatment option should be considered when selecting biologic therapy for patients with psoriasis and PsA (Table 117-26).
TNF Inhibitors
follow-up.29 Long-term postmarketing surveillance data confirmed the safety of anti-TNF therapy in patients with psoriasis, with no new safety signals emerging after 5 years of treatment.28,29
Ustekinumab
New insights into the pathogenesis of psoriasis and PsA led to the identification of novel therapeutic targets across different biologic pathways, including interleukin (IL)-12, IL-23, and IL-17. Ustekinumab, a fully human monoclonal antibody directed against IL-12/23, was the first of these novel targeted therapies to be approved for the treatment of psoriasis and PsA.15 In 2 phase 3 trials in patients with psoriasis, the majority of patients treated with ustekinumab 45 mg or 90 mg achieved a PASI 75 response after 12 weeks of therapy compared with less than 4% of patients given placebo.30,31 Ustekinumab is also effective in patients with moderate to severe psoriasis who had an inadequate response to prior TNF inhibition, with approximately 50% of patients achieving a PASI 50 response or better within 28 weeks of switching to ustekinumab.32 Ustekinumab demonstrated clinical efficacy in PsA in 2 phase 3 randomized trials. In the first randomized, placebo-controlled, phase 3 trial of patients with active PsA (N = 615), 42% and 50% of patients treated with ustekinumab 45 mg or 90 mg, respectively, achieved an ACR20 response after 24 weeks compared with 23% of patients in the placebo group (P <.001).33 In another phase 3 trial of patients with active PsA despite prior treatment with conventional DMARD or biologic therapy (N = 312), treatment with ustekinumab 45 mg or 90 mg was shown to significantly improve quality of life and physical
functioning in addition to reducing the clinical signs and symptoms of PsA compared with placebo.34
Five TNF inhibitors are currently available for the treatment of PsA: etanercept, infliximab, adalimumab, golimumab, and certolizumab pegol. Most anti-TNF therapies are available for subcutaneous injection, except infliximab, which is given by intravenous infusion.15 Therapies targeting TNF reduce the signs and symptoms of joint disease in the majority of patients with PsA.15 TNF inhibitors are also effective at addressing extra-articular manifestations of PsA, including skin involvement, axial disease, enthesitis, and dactylitis.11 Long-term treatment with anti-TNF agents also reduces the need for glucocorticoid therapy for PsA over time. In one study of biologic-naïve patients with PsA (N = 420), 49.6% were taking glucocorticoids at baseline. After starting anti-TNF therapy (adalimumab, etanercept, or infliximab), the rate of glucocorticoid use decreased to 36.5% at 2 years, 29.9% at 3 years, and 22.6% at 4 years. Moreover, among patients taking prednisone, the average daily dose significantly decreased from 5.6 mg at baseline to 4 mg at 4 years.27 Adalimumab, etanercept, and infliximab are also approved for the treatment of psoriasis. In an analysis of real-world registry data (N = 6059), 57% of patients with moderate to severe psoriasis achieved clear/almost clear status by Physician’s Global Assessment (PGA) after 12 months of treatment with adalimumab; this increased to 65% of patients after 60 months of treatment.28 In another observational registry study of etanercept in patients with moderate to severe psoriasis (N = 2510), 51% of patients achieved clear/almost clear status by month 6 of treatment and remained stable throughout 5 years of
IL-17 Inhibitors
treated with etanercept (P <.001 for each comparison with secukinumab). Moreover, 51% to 65% of patients treated with secukinumab achieved a PASI 75 response at week 12 compared with less than 3% of patients in the placebo group and 27% of those treated with etanercept (P <.001 for each comparison with secukinumab). In both trials, the rate of infection in the secukinumab group was higher than with placebo and similar to that with etanercept.36 In early 2015, secukinumab became the first IL-17A inhibitor approved for the treatment of moderate to severe plaque psoriasis.
In 2016, the FDA expanded the secukinumab indication to include PsA treatment based on findings from the phase 3 FUTURE 1 and FUTURE 2 trials.37-39 In the FUTURE 1 trial (N = 606), 50.0% and 50.5% of patients treated with secukinumab 150 mg or secukinumab 75 mg, respectively, achieved an ACR20 response by week 24 compared with 17.3% of patients in the placebo group (P <.001 for both comparisons).37 In a follow-up analysis of the FUTURE 1 trial, secukinumab was also associated with a significant reduction in radiographic progression of structural joint damage relative to placebo through 52 weeks of treatment. The FUTURE 2 trial compared 3 doses of secukinumab (300, 150, and 75 mg) with placebo in 397 patients with PsA.38 After 24 weeks, the ACR20 response rates were significantly higher across all secukinumab dosing groups compared with placebo. In particular, patients were 6-fold more likely to achieve an ACR20 response in the 2 highest-dosing groups, secukinumab 300 mg (54%; OR, 6.8; P <.0001) or secukinumab 150 mg (51%; OR, 6.5; P <.0001) than with placebo (15%).39 In both trials, secukinumab was associated with an increased risk of
infection relative to placebo.37-39
Ixekizumab
Ixekizumab is the most recent (2016) anti—IL-17A monoclonal antibody to join the psoriasis treatment armamentarium. Treatment with ixekizumab was initially evaluated in a dose-finding phase 1 trial of 40 patients with psoriasis. Across all dosing groups (5, 15, 50, and 150 mg), ixekizumab demonstrated significant dosedependent reductions in the clinical presentation of psoriasis, including reductions in keratinocyte proliferation and hyperplasia. Patients treated with the 2 highest doses of ixekizumab (50 mg and 150 mg) achieved near normalization of skin after 6 weeks of treatment, confirmed by biopsy analysis.40 Subsequent trials with ixekizumab showed greater efficacy than placebo and etanercept, with results seen as early as the first week on ixekizumab treatment. In addition, rapid and significant improvements in itch severity and quality of life were observed.41 In 2016, the FDA approved ixekizumab for the treatment of moderate to severe plaque psoriasis based on findings from the UNCOVER-1, UNCOVER-2, and UNCOVER-3 trials, which evaluated ixekizumab in patients with moderate to severe plaque psoriasis (N = 3866). Overall, 87% to 90% of patients achieved a PASI 75 response by week 12, which was sustained through 60 months of treatment. The most common AEs were nasopharyngitis, upper respiratory tract infection, injection-site reaction, and headache.41-43 Ixekizumab was also shown to significantly improve short- and long-term work productivity, which is an important end point for patients that influences the cost burden of psoriasis.42
The IL-17 signaling pathway plays an important role in the pathogenesis of psoriasis. IL-17 is a proinflammatory cytokine that acts on a wide range of cells, including keratinocytes. It is richly expressed in psoriatic skin lesions and in the synovial fluid of patients with PsA. Targeted therapies that block the activity of IL-17 show potent efficacy in controlling the underlying disease activity associated with psoriasis and PsA.15 Two subsequent randomized, double-blind, phase 3 trials established the safety and efficacy of secukinumab in plaque psoriasis. Patients with moderate to severe psoriasis (N = 2044) were randomly assigned to treatment with subcutaneous secukinumab (150 or 300 mg once weekly for 5 weeks, then every 4 weeks), placebo, or etanercept (50 mg twice weekly for 12 weeks, then once weekly) for 52 weeks. After 12 weeks, 67% to 81% of patients in the secukinumab groups experienced either clear or almost clear skin compared with less than 5% of patients in the placebo group and 44% of patients Ixekizumab is currently under evaluation for the treatment of PsA. One recent phase 3 trial compared ixekizumab 80 mg every 2 weeks or every 4 weeks, adalimumab 40 mg every 2 weeks, and placebo in patients with PsA who were naïve to biologic therapy (N = 417). After 24 weeks, 58% to 62% of patients treated with ixekizumab achieved an ACR20 response compared with 30% of those in the placebo group (P <.001). In the adalimumab group, 57% of patients achieved an ACR20 response. These findings support the potential role of ixekizumab given every 4 weeks in the treatment of active PsA, which represents improved convenience for patients when compared with standard biweekly treatment.44
Brodalumab
Whereas secukinumab and ixekizumab neutralize IL-17A, brodalumab blocks its receptor (IL-17RA). In a phase 1 proof-of-concept study, brodalumab showed a dose-dependent improvement in the clinical signs and symptoms of moderate to severe plaque psoriasis. Brodalumab also demonstrated a rapid reversal of adverse gene expression and histopathologic abnormalities, supporting the rationale for IL-17A—receptor blockade in psoriasis.45 Brodalumab has been shown to significantly improve the clinical signs and symptoms of psoriasis and PsA.46-48 However, the clinical development of brodalumab has been complicated by safety concerns, particularly rare reports of suicidal ideation in these patient populations.49 The Biologics License Application for brodalumab in moderate to severe psoriasis is currently under review with the FDA; it has an expected action date of November 16, 2016.50
Small-Molecule Inhibitors
Small molecular weight inhibitors of inflammatory mediators are another option for targeting the pathogenesis of psoriasis and PsA. With oral bioavailability, this therapeutic class represents improved convenience and the potential for improved adherence among patients with reservations regarding injectable therapy.12
Apremilast
Apremilast is an oral inhibitor of phosphodiesterase 4 that indirectly down-regulates the inflammatory response by enhancing the expression of anti-inflammatory cytokines while suppressing the activity of pro-inflammatory cytokines.51,52 In March 2014, apremilast became the first oral biologic drug approved for the treatment of active PsA. Later that year, in September 2014, the FDA expanded the indication for apremilast to include treatment of moderate to severe plaque psoriasis in patients for whom phototherapy or systemic therapy is appropriate.51 The approval of apremilast in PsA and plaque psoriasis was based on the phase 3 PALACE and ESTEEM clinical trial programs.52 PALACE 1 evaluated apremilast in 504 patients with active PsA despite standard treatment with synthetic DMARDs or biologic therapy. At week 16, approximately 30% and 40% of patients treated with apremilast 20 or 30 mg twice daily, respectively, achieved an ACR20 response compared with approximately 20% of those in the placebo group (P <.001).53 The ESTEEM 1 trial compared apremilast 30 mg twice daily or placebo in 844 patients with moderate to severe plaque psoriasis. After 16 weeks, 33% of patients in the apremilast group achieved a 75% or greater reduction in the PASI score compared with 5% of patients in the placebo group (P <.0001).54 Focusing on concomitant PsA and psoriasis, the PALACE 3 trial evaluated apremilast in 505 patients with PsA and current skin involvement. Treatment with apremilast 20 or 30 mg twice daily was associated with clinically meaningful improvements in both PsA and psoriasis measures by week 16, and sustained improvements continued through week 52.51 Apremilast was well tolerated and exhibited a highly acceptable safety profile. Up to 17% of patients develop gastrointestinal AEs in the first month of therapy.51-54 However, no laboratory monitoring of patients on apremilast is required.
Tofacitinib
Tofacitinib is a novel oral Janus kinase (JAK) inhibitor currently approved for the treatment of rheumatoid arthritis; it shows promising activity in both psoriasis and PsA.16,55 In a placebo-controlled phase 2 trial of patients with moderate to severe psoriasis (N = 197), twice-daily treatment with tofacitinib 2, 5, or 15 mg was associated with significant dose-dependent improvements in multiple patient-reported outcomes, including dermatologyrelated quality of life, itch severity, and Short Form-36 psychological and physical domains.55 Two recent identical phase 3 trials confirmed the safety and efficacy of tofacitinib in patients with psoriasis. In total, 1861 patients were randomly assigned 2:1 to treatment with oral tofacitinib (5 or 10 mg) or placebo twice daily. After 28 weeks, 55.6% and 68.8% of patients in the tofacitinib 5-mg and 10-mg groups, respectively, achieved a PASI 75 response; 54.7% and 65.9% of patients, respectively, achieved clear/almost clear status by PGA. Treatment efficacy was sustained in most patients through 24 months. The most common AEs were nasopharyngitis (18.8%) and upper respiratory tract infection (12.6%). Overall, 10.1% of patients developed serious AEs, and 10.7% discontinued treatment due to AEs.56
serious AEs and 1% to 3% of patients discontinuing treatment due to AEs.57 In patients with PsA, tofacitinib appears to reduce synovial inflammation and other markers of PsA disease activity.58 In a randomized, double-blind, phase 3 trial of patients with psoriasis and/or PsA (N = 99), treatment with tofacitinib 5 mg or 10 mg twice daily was associated with high response rates, as measured by PASI 75 response (63% and 73%, respectively) and a clear/almost clear PGA response (67% to 68%). In addition, all patients with PsA (N = 12) achieved an ACR20 response by treatment week 12. Four patients (4.3%) developed serious AEs, including 3 cases of herpes zoster infection.59 Overall, these findings support the potential therapeutic role of JAK inhibition in patients with PsA (similar to rheumatoid arthritis, for which tofacitinib FDA approved). A topical formulation of tofacitinib ointment is currently under development for the treatment of chronic plaque psoriasis.60
Treatment Selection in Practice: 2016 GRAPPA PsA Treatment Algorithm
In a phase 3 noninferiority trial, tofacitinib 10 mg twice daily was noninferior to etanercept 50 mg twice weekly and superior to placebo in terms of PASI 75 response and clear/almost clear PGA response in patients with moderate to severe plaque psoriasis. The safety analysis showed similar AE rates at 12 weeks in patients treated with tofacitinib or etanercept, with 2% of patients developing In 2016, the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) published updated guidelines on the management of patients with PsA, including those with psoriasis. The new guidance defines the 6 major domains of PsA: peripheral arthritis, axial disease, enthesitis, dactylitis, skin involvement, and nail disease. While many patients with PsA exhibit multiple manifestations, the selection of therapy should be driven by the most severe component of each patient’s clinical presentation (Figure 21).1
Peripheral Arthritis
Traditional DMARDs and biologic therapies are strongly recommended for the treatment of PsA. In particular, biologics should be initiated early in patients with poor prognostic factors, such as high inflammatory markers and multiple active joints. For patients with an inadequate response to their first biologic therapy, switching to a second biologic agent is recommended. The GRAPPA guideline supports the conditional use of NSAIDs and corticosteroids to control the signs and symptoms of PsA but also indicates that these agents should be used with caution due to the potential for AEs. If needed, corticosteroids should be given in the lowest doses (eg, <7.5 mg/day) and for short periods of time to provide symptomatic control.1
Axial Disease
Given the lack of clinical trial data in PsA-specific axial disease, the GRAPPA recommendations rely on experience in ankylosing spondylitis. Appropriate firstline therapy for axial disease can include NSAIDs, sacroiliac injections, and physiotherapy. However, traditional DMARDs show poor efficacy against axial manifestations. Therefore, patients with PsA with predominant axial disease who require treatment intensification should consider early initiation of anti-TNF therapy.1
Enthesitis
Standard first-line treatment for enthesitis involves NSAIDs. As with axial disease, there is a lack of evidence to support the use of DMARDs to treat enthesitis. Therefore, for patients with an inadequate response to NSAIDs alone, biologics are the recommended second-line therapies. In that group, TNF inhibitors and ustekinumab appear to be highly effective in reducing the tendon and ligament inflammation characteristic of enthesitis. Preliminary evidence also supports the use of secukinumab and apremilast to treat enthesitis in patients with PsA.1
Dactylitis
Traditional DMARDs are recommended as first-line therapy for patients with dactylitis. If needed, corticosteroid injections are also effective at controlling digit inflammation. Clinical trial data support the
use of biologic therapies, particularly TNF inhibitors, ustekinumab, secukinumab, and apremilast. To date, however, there is little evidence to guide further treatment adjustments for patients with an inadequate response to initial biologic therapy.1
Skin Involvement
Topical medications are recommended for the first-line treatment of psoriasis, particularly in patients with mild and/or limited disease. Phototherapy and DMARDs provide improved control of psoriatic skin lesions; they should be considered for use in combination with topical medications as initial treatment in patients with more extensive disease. Systemic and biologic therapies are the next step for patients with widespread skin involvement who experience an inadequate response to topical medications, DMARDs, and phototherapy. Until patients find a combination regimen that provides optimal disease control, switching among DMARDs and biologic agents may be necessary.1
Nail Disease
Patients with PsA and moderate to severe nail disease respond well to first-line treatment with TNF inhibitors and other biologics, including ustekinumab, anti-IL17 therapy, and apremilast. For patients with milder psoriatic nail disease or contraindications to biologic therapy, treatment options include topical medications, nonbiologic DMARDs, and intralesional corticosteroid injections.1
Preventing Complications
Preventing complications in patients with psoriasis and PsA begins with a thorough medical history, with a review of systems covering cutaneous, musculoskeletal, immune, hematologic, cardiac, gastrointestinal, neurologic, reproductive, and family and social history.16 When selecting systemic therapy, the contraindications, precautions, and side-effect profiles of each agent should be considered
(Table 117-26). Clinicians should consider risk-aversion strategies, such as avoiding therapies with a significant risk of liver toxicity in patients with chronic alcohol use or a history of hepatitis (Table 216). The potential for drug—drug interactions should be assessed and addressed. Patient education and counseling can ensure that patients are willing to attempt the prescribed therapy and have realistic expectations regarding efficacy, tolerability, cost, and convenience.16
Addressing Patient Treatment Obstacles
Nearly 40% of patients with psoriasis are untreated in current clinical practice, and over half of those with severe disease are treated with inadequate therapy (Table 3).61 Even when patients are prescribed guideline-based therapy, adherence is often poor, leading to reduced treatment efficacy.62 For many patients with psoriasis, correct use of topical medications can be time-consuming and burdensome. In one survey of nearly 18,000 patients with psoriasis, patients spent an average of 26 minutes per day applying topical agents.63 Poor adherence can lead to reduced treatment efficacy and the need for more aggressive and/or costly therapy. To support adherence, it is important to select a first-line treatment regimen with enough potency to achieve a favorable clinical response.7 Addressing comorbidities and incorporating patients preferences regarding treatment is essential while also improving adherence. One study showed that comorbidities significantly influenced preferences for treatment among patients with psoriasis. Patients with comorbid PsA prioritized treatment efficacy, while those with cardiovascular disease were primarily concerned with the risk of side effects. Among patients with comorbid depression, the duration and cost of treatment were key treatment concerns.64 Furthermore, it is important to note that patient preferences may change over time, and treatment adjustments may be needed to reflect changing treatment goals.65
Conclusion
Multiple treatment options are now available to relieve symptoms, protect physical function, and improve quality of life for patients with psoriasis and PsA. Many patients with moderate to severe disease will require combination regimens that may include traditional DMARDs and biologic therapies to provide appropriate control of inflammatory disease activity. To ensure that optimal therapy is provided, clinicians should take time to discuss the true burden of disease with their patients, including the degree to which their disease interferes with both their physical, as well as mental, health. Effective
communication allows patients to have an active role in treatment decisions based on expectations about efficacy, AEs, convenience, and tolerability.
Author affiliation: Baylor University Medical Center, Dallas, Texas.
Funding source: This activity is supported by educational grants from Lilly and Novartis.
Author disclosure: Dr Menter has no relevant financial relationships with commercial interests to disclose.
Authorship information: Concept and design, drafting of the manuscript, and critical revision of the manuscript for important intellectual content.
Address correspondence to: amderm@gmail.com.
1. Coates LC, Kavanaugh A, Mease PJ, et al. Group for research and assessment of psoriasis and psoriatic arthritis 2015 treatment recommendations for psoriatic arthritis. Arthritis Rheumatol. 016;68(5):1060-1071. doi: 10.1002/art.39573.
2. Menter A, Gottlieb A, Feldman SR, et al. Guidelines of care for the management of psoriasis and psoriatic arthritis: section 1. Overview of psoriasis and guidelines of care for the treatment
of psoriasis with biologics. J Am Acad Dermatol. 2008;58(5):826-850. doi: 10.1016/j.jaad.2008.02.039.
3. Højgaard P, Glintborg B, Hetland ML, et al. Association between tobacco smoking and response to tumour necrosis factor iinhibitor treatment in psoriatic arthritis: results from the DANBIO registry. Ann Rheum Dis. 2015;74(12):2130-2136. doi:10.1136/annrheumdis-2014-205389.
4. Gottlieb A, Korman NJ, Gordon KB, et al. Guidelines of care for the management of psoriasis and psoriatic arthritis: Section 2. Psoriatic arthritis: overview and guidelines of care for treatment
with an emphasis on the biologics. J Am Acad Dermatol. 2008;58(5):851-864. doi: 10.1016/j.jaad.2008.02.040.
5. Coates LC, Moverley AR, McParland L, et al. Effect of tight control of inflammation in early psoriatic arthritis (TICOPA): a UK multicentre, open-label, randomised controlled trial. Lancet. 2015;386(10012):2489-2498. doi: 10.1016/S0140-6736(15)00347-5.
6. Armstrong AW, Bagel J, Van Voorhees AS, Robertson AD, Yamauchi PS. Combining biologic therapies with other systemic treatments in psoriasis: evidence-based, best-practice recommendations
from the Medical Board of the National Psoriasis Foundation. JAMA Dermatol. 2015;151(4):432-438. doi: 10.1001/jamadermatol.2014.3456.
7. Menter A, Korman NJ, Elmets CA, et al; American Academy of Dermatology. Guidelines of care for the management of psoriasis and psoriatic arthritis. Section 3. Guidelines of care for the management and treatment of psoriasis with topical therapies. J Am Acad Dermatol. 2009;60(4):643-659. doi: 10.1016/j.jaad.2008.12.032.
8. Menter Kamili. Topical treatment of psoriasis. In: Yawalkar N, editor. Current problems in dermatology. Basel, Switzerland:S. Karger AG; 2009.
9. Racz E, Prens EP. Phototherapy and photochemotherapy for psoriasis. Dermatol Clin. 2015;33(1):79-89. doi: 10.1016/j.det.2014.09.007.
10. Menter A, Korman NJ, Elmets CA, et al. Guidelines of care for the management of psoriasis and psoriatic arthritis: Section 5. Guidelines of care for the treatment of psoriasis with phototherapy
and photochemotherapy. J Am Acad Dermatol. 2010;62(1):114-135. doi: 10.1016/j.jaad.2009.08.026.
11. Sivanesan SP, Gattu S, Hong J, et al. Randomized, doubleblind, placebo-controlled evaluation of the efficacy of oral psoralen plus ultraviolet A for the treatment of plaque-type psoriasis using the Psoriasis Area Severity Index score (improvement of 75% or greater) at 12 weeks. J Am Acad Dermatol. 2009;61(5):793-798. doi: 10.1016/j.jaad.2009.04.053.
12. Soriano ER. Management of psoriatic arthritis: traditional disease-modifying rheumatic agents and targeted small molecules. Rheum Dis Clin North Am. 2015;41(4):711-722. doi: 10.1016/j.rdc.2015.07.012.
13. Carrascosa JM, de la Cueva P, Ara M, et al. Methotrexate in moderate to severe psoriasis: review of the literature and expert recommendations. Actas Dermosifiliogr. 2016;107(3):194-206. doi: 10.1016/j.ad.2015.10.005.
14. Ryan C, Korman NJ, Gelfand JM, et al. Research gaps in psoriasis: opportunities for future studies. J Am Acad Dermatol. 2014;70(1):146-167. doi: 10.1016/j.jaad.2013.08.042.
15. Mease PJ. Biologic therapy for psoriatic arthritis. Rheum Dis Clin North Am. 2015;41(4):723-738. doi: 10.1016/j.rdc.2015.07.010.
16. Kelly JB III, Foley P, Strober BE. Current and future oral systemic therapies for psoriasis. Dermatol Clin. 2015;33(1):91-109. doi: 10.1016/j.det.2014.09.008.
17. Stelara (ustekinumab) [prescribing information]. Horsham, PA: Janssen Biotech, Inc; 2014.
18. Cosentyx (secukinumab) [prescribing information]. East Hanover, NJ: Novartis Pharmaceuticals Corp; 2016.
19. Cimzia (certolizumab pegol) [prescribing information].Smyrna, GA: UCB, Inc; 2016.
20. Humira (adalimumab) [prescribing information]. North Chicago, IL: AbbVie Inc; 2016.
21. Enbrel (etanercept) [prescribing information]. Thousand Oaks, CA: Immunex Corp; 2013.
22. Otezla (apremilast) [prescribing information]. Summit, NJ: Celgene Corp; 2015.
23. Remicade (infliximab) [prescribing information]. Horsham, PA: Janssen Biotech, Inc; 2015.
24. Simponi (golimumab) [prescribing information]. Horsham, PA: Janssen Biotech, Inc; 2013.
25. Taltz (ixekizumab) [prescribing information]. Indianapolis, IN: Eli Lilly and Company; 2016.
26. Koutnik-Fotopoulos E. The biologic revolution in treatment of psoriasis and PsA. The Dermatologist. 2015;23(12):10-16.
27. Iannone F, Lopriore S, Bucci R, et al. Longterm clinical outcomes in 420 patients with psoriatic arthritis taking anti-tumor necrosis factor drugs in real-world settings. J Rheumatol. 2016;43(5):911-917. doi: 10.3899/jrheum.151042.
28. Menter A, Thaçi D, Papp KA, et al. Five-year analysis from the ESPRIT 10-year postmarketing surveillance registry of adalimumab treatment for moderate to severe psoriasis. J Am Acad Dermatol. 2015;73(3):410-419.e6. doi: 10.1016/j.jaad.2015.06.038.
29. Kimball AB, Rothman KJ, Kricorian G, et al. OBSERVE-5: observational postmarketing safety surveillance registry of etanercept for the treatment of psoriasis final 5-year results. J Am Acad Dermatol. 2015;72(1):115-122. doi: 10.1016/j.jaad.2014.08.050.
30. Leonardi CL, Kimball AB, Papp KA, et al; PHOENIX 1 study investigators. Efficacy and safety of ustekinumab, a human interleukin-12/23 monoclonal antibody, in patients with psoriasis: 76-week results from a randomised, double-blind, placebo-controlled trial (PHOENIX 1). Lancet. 2008;371(9625):1665-1674. doi:10.1016/S0140-6736(08)60725-4.
31. Papp KA, Langley RG, Lebwohl M, et al; PHOENIX 2 study investigators. Efficacy and safety of ustekinumab, a human interleukin-12/23 monoclonal antibody, in patients with psoriasis: 52-week results from a randomised, double-blind, placebo-controlled trial (PHOENIX 2). Lancet. 2008;371(9625):1675-1684. doi:10.1016/S0140-6736(08)60726-6.
32. Wang TC, Chiu HY, Wang TS, Tsa TF. Practical experience of ustekinumab in patients with moderate-to-severe psoriasis who had inadequate therapeutic response to previous tumor necrosis
factor blockers. Dermatologica Sinica. 2015;33(1):5-10.
33. McInnes IB, Kavanaugh A, Gottlieb AB, et al; PSUMMIT 1 Study Group. Efficacy and safety of ustekinumab in patients with active psoriatic arthritis: 1 year results of the phase 3, multicenter,
double-blind, placebo-controlled PSUMMIT I trial. Lancet. 2013;382(9894):780-789. doi: 10.1016/S0140-6736(13)60594-2.
34. Ritchlin C, Rahman P, Kavanaugh A, et al; PSUMMIT 1 Study Group. Efficacy and safety of the anti-IL-12/23 p40 monoclonal antibody, ustekinumab, in patients with active psoriatic arthritis
despite conventional non-biological and biological anti-tumour necrosis factor therapy: 6-month and 1-year results of the phase 3, multicentre, double-blind, placebo-controlled, randomised PSUMMIT 2 trial. Ann Rheum Dis. 2014;73(6):990-999. doi: 10.1136/annrheumdis-2013-204655
35. Hueber W, Patel DD, Dryja T, et al. Effects of AIN457, a fully human antibody to interleukin-17A, on psoriasis, rheumatoid arthritis, and uveitis. Sci Transl Med. 2010;2(52):52ra72. doi: 10.1126/scitranslmed.3001107.
36. Langley RG, Elewski BE, Lebwohl M, et al; ERASURE Study Group; FIXTURE Study Group. Secukinumab in plaque psoriasis--results of two phase 3 trials. N Engl J Med. 2014;371(4):326-338.
doi: 10.1056/NEJMoa1314258.
37. Mease PJ, McInnes IB, Kirkham B, et al; FUTURE 1 Study Group. Secukinumab inhibition of interleukin-17A in patients with psoriatic arthritis. N Engl J Med. 2015;373(14):1329-1339. doi: 10.1056/NEJMoa1412679.
38. van der Heijde D, Landewé RB, Mease PJ, et al. Secukinumab provides significant and sustained inhibition of joint structural damage in a phase III study of active psoriatic arthritis [Epub ahead of print]. Arthritis Rheumatol. 2016. doi: 10.1002/art.39685.
39. McInnes IB, Mease PJ, Kirkham B, et al; FUTURE 2 Study Group. Secukinumab, a human anti-interleukin-17A monoclonal antibody, in patients with psoriatic arthritis (FUTURE 2): a randomised,
double-blind, placebo-controlled, phase 3 trial. Lancet. 2015;386(9999):1137-1146. doi: 10.1016/S0140-6736(15)61134-5.
40. Krueger JG, Fretzin S, Suárez-Fariñas M, et al. IL-17A is essential for cell activation and inflammatory gene circuits in subjects with psoriasis. J Allergy Clin Immunol. 2012;130(1):145-154.e9.
doi: 10.1016/j.jaci.2012.04.024.
41. Griffiths CE, Reich K, Lebwohl M, et al; UNCOVER-2 and UNCOVER-3 investigators. Comparison of ixekizumab with etanercept or placebo in moderate-to-severe psoriasis (UNCOVER-2
and UNCOVER-3): results from two phase 3 randomised trials. Lancet. 2015;386(9993):541-551. doi: 10.1016/S0140-6736(15)60125-8.
42. Armstrong AW, Lynde CW, McBride SR, et al. Effect of ixekizumab treatment on work productivity for patients with moderateto-severe plaque psoriasis: analysis of results from 3 randomized phase 3 clinical trials [Epub ahead of print]. JAMA Dermatol. 2016. doi: 10.1001/jamadermatol.2016.0269.
43. Farahnik B, Beroukhim K, Zhu TH, et al. Ixekizumab for the treatment of psoriasis: a review of phase III trials. Dermatol Ther (Heidelb). 2016;6(1):25-37. doi: 10.1007/s13555-016-0102-0.
44. Mease PJ, van der Heijde D, Ritchlin CT, et al. A randomized, double-blind, active- and placebo-controlled phase 3 study of efficacy and safety of ixekizumab, adalimumab, and placebo therapy
in patients naïve to biologic disease modifying anti-rheumatoid drugs with active psoriatic arthritis. Presented at: the American College of Rheumatology 2015 Annual Meeting. November 7-11, 2015; San Francisco, CA. Abstract 977.
45. Martin DA, Towne JE, Kricorian G, et al. The emerging role of IL-17 in the pathogenesis of psoriasis: preclinical and clinical findings. J Invest Dermatol. 2013;133(1):17-26. doi: 10.1038/jid.2012.194.
46. Mease PJ, Genovese MC, Greenwald MW, et al. Brodalumab, an anti-IL17RA monoclonal antibody, in psoriatic arthritis. N Engl J Med. 2014;370(24):2295-2306. doi: 10.1056/NEJMoa1315231.
47. Papp K, Leonardi C, Menter A, et al. Safety and efficacy of brodalumab for psoriasis after 120 weeks of treatment. J Am Acad Dermatol. 2014;71(6):1183-1190.e3. doi: 10.1016/j.jaad.2014.08.039.
48. Papp K, Menter A, Strober B, et al. Efficacy and safety of brodalumab in subpopulations of patients with difficult-to-treat moderate-to-severe plaque psoriasis. J Am Acad Dermatol. 2015;72(3):436-439. doi: 10.1016/j.jaad.2014.10.026.
49. Psoriasis trial drug halted due to suicide concerns. National Psoriasis Foundation website. www.psoriasis.org/advance/psoriasis-trial-drug-halted-due-to-suicide-concerns. Published January 5,
2016. Accessed April 1, 2016.
50. Valeant announces FDA acceptance of BLA submission for brodalumab in moderate-to-severe plaque psoriasis [press release]. Quebec, Canada. PR Newswire; January 26, 2016. www.prnewswire.com/news-releases/valeant-announces-fda-acceptance-of-bla-submission-for-brodalumab-in-moderate-to-severeplaque-psoriasis-300208845.html. Accessed April 1, 2016.
51. Edwards CJ, Blanco FJ, Crowley J, et al. Apremilast, an oral phosphodiesterase 4 inhibitor, in patients with psoriatic arthritis and current skin involvement: a phase III, randomised, controlled
trial (PALACE 3). Ann Rheum Dis. 2016;75(6):1065-1073. doi:10.1136/annrheumdis-2015-207963.
52. Zerilli T, Ocheretyaner E. Apremilast (Otezla): a new oral treatment for adults with psoriasis and psoriatic arthritis. PT. 2015;40(8):495-500.
53. Kavanaugh A, Mease PJ, Gomez-Reino JJ, et al. Treatment of psoriatic arthritis in a phase 3 randomised, placebo-controlled trial with apremilast, an oral phosphodiesterase 4 inhibitor. Ann Rheum Dis. 2014;73(6):1020-1026. doi: 10.1136/annrheumdis-2013-205056.
54. Papp K, Reich K, Leonardi CL, et al. Apremilast, an oral phosphodiesterase 4 (PDE4) inhibitor, in patients with moderate to severe plaque psoriasis: results of a phase III, randomized, controlled trial (Efficacy and Safety Trial Evaluating the Effects of Apremilast in Psoriasis [ESTEEM] 1). J Am Acad Dermatol. 2015;73(1):37-49. doi: 10.1016/j.jaad.2015.03.049.
55. Mamolo C, Harness J, Tan H, Menter A. Tofacitinib (CP-690,550), an oral Janus kinase inhibitor, improves patient-reported outcomes in a phase 2b, randomized, double-blind, placebo-controlled study in patients with moderate-to-severe psoriasis. J Eur Acad Dermtol Venereol. 2014;28(2):192-203. doi: 10.1111/jdv.12081
56. Papp KA, Krueger JG, Feldman SR, et al. Tofacitinib, an oral Janus kinase inhibitor, for the treatment of chronic plaque psoriasis: long-term efficacy and safety results from 2 randomized phase-III studies and 1 open-label long-term extension study. J Am Acad Dermatol. 2016;74(5):841-850. doi: 10.1016/j.jaad.2016.01.013.
57. Bachelez H, van de Kerkhof PC, Strohal R, et al; OPT Compare Investigators. Tofacitinib versus etanercept or placebo in moderate-to-severe chronic plaque psoriasis: a phase 3 randomised
non-inferiority trial. Lancet. 2015;386(9993):552-561. doi: 10.1016/S0140-6736(14)62113-9.
58. Gao W, McGarry T, Orr C, McCormick J, Veale DJ, Fearon U. Tofacitinib regulates synovial inflammation in psoriatic arthritis, inhibiting STAT activation and induction of negative feedback
inhibitors. Ann Rheum Dis. 2016;75(1):311-315. doi: 10.1136/annrheumdis-2014-207201.
59. Asahina A, Etoh T, Igarashi A, et al; study investigators. Oral tofacitinib efficacy, safety and tolerability in Japanese patients with moderate to severe plaque psoriasis and psoriatic arthritis: a
randomized, double-blind, phase 3 study [Epub ahead of print]. J Dermatol. 2016. doi: 10.1111/1346-8138.13258.
60. Ports WC, Khan S, Lan S, et al. A randomized phase 2a efficacy and safety trial of the topical janus kinase inhibitor tofacitinib in the treatment of chronic plaque psoriasis. Br J Dermatol.
2013;169(1):137-145. doi: 10.1111/bjd.12266.
61. Horn EJ, Fox KM, Patel V, Chiou CF, Dann F, Lebwohl M. Are patients with psoriasis undertreated? Results of National Psoriasis Foundation survey. J Am Acad Dermatol. 2007;57(6):957-962.
62. Augustin M, Holland B, Dartsch D, Langenbruch A, Radtke MA. Adherence in the treatment of psoriasis: a systematic review. Dermatology. 2011;222(4):363-374. doi: 10.1159/000329026.
63. Krueger G, Koo J, Lebwohl M, Menter A, Stern RS, Rolstad T. The impact of psoriasis on quality of life: results of a 1998 National Psoriasis Foundation patient-membership survey. Arch
Dermatol. 2001;137(3):280-284.
64. Schmieder A, Schaarschmidt ML, Umar N, et al. Comorbidities significantly impact patients’ preferences for psoriasis treatments. J Am Acad Dermatol. 2012;67(3):363-372. doi: 10.1016/j.
jaad.2011.08.023
65. Schaarschmidt ML, Umar N, Schmieder A, et al. Patient preferences for psoriasis treatments: impact of treatment experience. J Eur Acad Dermatol Venereol. 2013;27(2):187-198. doi: 10.1111/j.1468-3083.2011.04440.x.