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Latest Advances for the Treatment of Chronic Plaque Psoriasis with Biologics and Oral Small Molecules

Authors Bellinato F, Gisondi P , Girolomoni G 

Received 30 April 2021

Accepted for publication 3 June 2021

Published 29 June 2021 Volume 2021:15 Pages 247—253

DOI https://doi.org/10.2147/BTT.S290309

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Doris Benbrook

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Francesco Bellinato, Paolo Gisondi, Giampiero Girolomoni

Department of Medicine, Section of Dermatology and Venereology, University of Verona, Verona, Italy

Correspondence: Francesco Bellinato
Department of Medicine, Section of Dermatology and Venereology, University of Verona, Verona, Italy
Email [email protected]

Abstract: Psoriasis is a common immune-mediated chronic skin disease. Disease severity is influenced by several factors including the extent and localization of skin lesions, severity of pruritus and comorbidities, such as psoriatic arthritis. Moderate to severe psoriasis is defined when cutaneous involvement is diffuse, covering more than 10% of the body surface areas and/or involving the sensitive areas such as face, genitalia, folds or nails or has high impact on patients’ quality of life, and it occurs in approximately 15% of cases. In recent years, a growing understanding of psoriasis pathophysiology allowed the development of an increasing number of effective and safe treatments, including biologicals that are indicated for moderate to severe psoriasis. Different classes of biologicals have been already approved, including TNF-α (etanercept, infliximab, adalimumab and certolizumab pegol), IL-12/23 (ustekinumab), IL-17 (secukinumab, ixekizumab, brodalumab) and IL-23 (guselkumab, risankizumab, tildrakizumab) inhibitors. The objective of this narrative review is to revise efficacy and safety data of the latest biologicals, small oral molecules and biosimilar drugs for the treatment of chronic plaque psoriasis at Phase III of clinical development. The latest IL-17 and IL-23 inhibitors include bimekizumab, netakimab and mirikizumab as well as oral small molecules, such as deucravacitinib, a tyrosine kinase 2 selective inhibitor, and piclidenoson, an agonist of the Gi protein-associated A3 adenosine receptor. Additional molecules are in an early phase of development. Highly promising biologicals and small oral molecules are the leading edge of the systemic treatment of psoriasis.

Keywords: psoriasis, bimekizumab, mirikizumab, netakimab, sonelokimab, deucravacitinib, piclidenoson, biosimilars, biologics

Introduction

Psoriasis is a chronic, immuno-mediated skin inflammatory disease frequently affecting 2–3% of general population.1 Disease severity is influenced by several factors including the extent and localization of skin lesions and comorbidities, such as psoriatic arthritis, as well as the impact on life (Figure 1A).2 The treatment success entails the achievement of psoriasis clearance or almost clearance, which best correlates with improvement in quality of life (Figure 1B). Over the last years, highly effective targeted therapies have been developed, including conventional, biologicals and oral small molecules. The classes of biologicals include tumor necrosis factor (TNF)-α inhibitors (etanercept, infliximab, adalimumab and certolizumab pegol), the interleukin (IL)-12/23 inhibitor (ustekinumab), the IL-17 inhibitors (secukinumab, ixekizumab, and brodalumab) and IL-23 inhibitors (guselkumab, tildrakizumab, and risankizumab).3 The advent of new biologicals has raised the standard of efficacy and safety in the treatment of psoriasis, even if there is still a medical need for novel treatments allowing a higher cutaneous clearance and durability.4,5 In addition, most treatments lose efficacy over time, thus with new treatment options needed. In recent years, a growing understanding of psoriasis pathophysiology allowed the development of an increasing number of effective and safe treatments. In this narrative review, latest development with biological, small oral molecules and new biosimilar drugs for the treatment of chronic plaque psoriasis are discussed.

Figure 1 A 27-year-old man affected by moderate to severe psoriasis presenting with erythematous-desquamative plaques on the back (A). Complete cutaneous clearance after 12 weeks treatment with an IL-23 inhibitor (B).

Materials and Methods

A narrative review based on electronic searches either on PubMed® or clinicaltrials.org database was performed. Original articles investigating emerging biological, small oral molecules and new biosimilars for chronic plaque psoriasis at phase III stage of clinical development were retrieved. Search strategy in clinicaltrials.org included all the phase III interventional studies reporting results or in recruiting phase. Secondly, consecutive searches on PubMed® using “bimekizumab”, “UCB4940”, “netakimab”, “BCD-085”, “mirikizumab”, “LY3074828”, “sonelokimab”, “IL17MS3086”, “deucravacitinib”, “BMS-986165”, “picledenoson”, “CF101”, biosimilars and psoriasis as search term were performed. References of all the identified original research articles were also checked for any additional literature. For all the drugs included, data concerning mechanisms, pharmaceutical company, currently investigated indications, efficacy and safety profile were collected (Table 1). Emerging drugs in Phase II of clinical development have been described shortly in the discussion.

Table 1 Latest Biologics and Oral Small Molecules for the Treatment of Chronic Plaque Psoriasis on Clinical Development

Results

IL-17 Inhibitors

Bimekizumab

Bimekizumab is a monoclonal humanized IgG1 antibody that blocks IL-17F and IL-17A developed by UCB.6 Bimekizumab differs from secukinumab and ixekizumab, which are selective inhibitors of IL-17A and from brodalumab which is an IL-17 receptor inhibitor.6 The additive advantage of dual IL-17A and F is being investigated.7 Initial phase II studies showed that bimekizumab allows rapid and durable clinical improvements in patients with moderate to severe psoriasis with an expected safety profile.8 The results of two phase III clinical trials of bimekizumab, BE VIVID and BE READY, have recently been published.9,10 BE VIVID is a multicenter, double-blind, controlled trial comparing the efficacy and safety of bimekizumab versus placebo and ustekinumab over 52 weeks. At 16 weeks, the PASI90 was achieved by 85% of the patients on bimekizumab versus 50% on ustekinumab versus 5% on placebo. Investigator global assessment (IGA) score of 0–1 (clear and almost clear skin) was achieved by 84% of patients on bimekizumab versus 53% of those on ustekinumab and 5% on placebo. Complete clearance at week 16 (PASI100 or IGA=0) was reached by 59% of the patients in the bimekizumab arm compared to 21% of patients in the ustekinumab arm.9 BE READY is a multicenter, double-blind, placebo-controlled, randomized trial investigating the effects of bimekizumab withdrawal and two maintenance dosing schedules (320 mg every 4 versus 8 weeks) over 56 weeks. PASI90 was achieved by 91% of the patients on bimekizumab compared to 1% of those on placebo. IGA score of 0–1 was achieved by 93% on bimekizumab versus 1% of those on placebo. A sustained cutaneous clearance was maintained after drug withdrawal with a median time to loss of PASI75 of 32 weeks.10 Finally, the results of the two Phase 3, multicenter, randomized, double-blind, active comparator, controlled trial BE SURE (NCT03412747) and BE RADIANT (NCT03536884) are available.11,12 Bimekizumab was compared either to adalimumab or secukinumab, respectively. BE SURE showed that at week 16, PASI90 response was achieved by 86.2% of the patients treated with bimekizumab, compared to 47.2% who received adalimumab. BE RADIANT showed that at week 48, PASI 100 was achieved by 67.0% of the patients treated with bimekizumab, compared to 46.2% of the treated with secukinumab. In all these studies, the safety profile was consistent with that observed in the previous phase IIb study: treatment emergent adverse events (TEAEs) occurred in 61% of bimekizumab treated patients versus 36% of the placebo arm, more commonly nasopharyngitis and upper respiratory tract infections (URTI). Oral candidiasis occurred in 19% of the patients treated with bimekizumab versus 3% of those on secukinumab.12 Only one out of 744 bimekizumab treated patients in both BE VIVID and BE READY studies developed inflammatory bowel disease and there was one case of new-onset ulcerative colitis either in the bimekizumab or secukinumab group.9,10,12 A placebo-controlled randomized proof-of-concept clinical trial investigated safety, pharmacokinetics and clinical efficacy of bimekizumab at multiple doses (range 560mg/320mg/320mg-80mg/40mg/40mg) for psoriatic arthritis. At week 8, American College of Rheumatology 20% (ACR20) response was achieved by 80% of the patients treated with top three doses bimekizumab compared to 17% in the placebo arm. No unexpected safety signals were reported.9 There are ongoing phase II clinical trials to test the efficacy of bimekizumab in the treatment of hidradenitis suppurativa (NCT03248531).

Netakimab

Netakimab is an injectable humanized IgG1 nanobody that targets IL-17A developed by BIOCAD. In netakimab, the VH domain is replaced by the VHH domain of Lama possessing a long complementarity determining region (CDR-H3) in its heavy chain that has a high affinity to IL-17A.13 Nanobodies are a new generation drug based on single-domain of heavy-chain-only antibodies exhibiting higher stability and higher penetration in the tissues. Netakimab is currently registered in Russia (Efleira®) for the treatment of moderate-to-severe psoriasis in adults.14 Initial phase II trials showed that 93% of the subjects achieved PASI75 within 3 months and netakimab maintained efficacy, favorable safety profile and low immunogenicity during one year of the treatment. Preliminary results of BCD-085-7/PLANETA study (NCT03390101), a comparative, randomized, double-blind, placebo-controlled phase III clinical study, showed that at week 12 PASI75 was achieved by 83.3% and 77.7% of the patients treated with netakimab 120 mg every four and every two weeks, respectively, compared to 0% in placebo arm.15–17 The drug showed a favorable safety profile consistent with those expected for the class of IL-17 inhibitors, and low immunogenicity.15 Finally, the results of the 24-week period phase III clinical trial (PATERA study) investigating the efficacy and safety of netakimab compared to placebo in patients with active psoriatic arthritis showed that netakimab 120 mg is significantly superior to placebo in patients with active psoriatic arthritis. In this study PASI75, PASI90 and PASI100 were reported as secondary endpoints (Table 1).18

IL-23 Inhibitors

Mirikizumab

Mirikizumab is a humanized monoclonal IgG4 variant antibody targeting the p19 subunit of IL-23 developed by Eli Lilly.19 Mirikizumab was initially investigated in 2019 in a phase II randomized controlled trial comparing different doses (30, 100, or 300 mg) given at 0 and 8 weeks. PASI90 was achieved by 59% and 67% of the patients treated with mirikizumab 100 mg and 300 mg, respectively. Results of the phase III randomized, double-blind, placebo-controlled study OASIS-1 (NCT03482011) showed that 64% of the patients treated with mirikizumab 250 mg every 4 weeks achieved PASI90 at 16 weeks versus 6.5% in the placebo arm and 69% achieved IGA 0–1 compared to 6.5% in the placebo arm.20 The preliminary results of OASIS-2 (NCT03535194), a multicenter randomized, double-blind, placebo-controlled study comparing the efficacy and safety of mirikizumab to placebo and secukinumab, showed that mirikizumab met the primary and all key secondary endpoints versus placebo at week 16 (superiority) and all key secondary endpoints versus the active comparator at week 16 (non-inferiority) and week 52 (superiority).21 Mirikizumab is currently being investigated in the phase III study OASIS-3.22 The percentage of patients reporting at least one AE was similar among patients treated with placebo or mirikizumab. The most common were viral infections, hypertension, infections of the respiratory tract, injection-site pain and diarrhoea.15 Despite these promising results, Eli Lilly no longer plans to submit mirikizumab for regulatory approval in psoriasis and will prioritize on other indications. Indeed, there are ongoing phase II clinical trials to test mirikizumab in the treatment of ulcerative colitis and Crohn's disease.23

Sonelokimab

Sonelokimab (IL17MS3086) is a trivalent camelid nanobody binding to IL-17A and F at Phase 2 stage, developed by Merck Serono in collaboration with Avillion. Camelid antibodies derived from the Camelidae family of mammals, including llamas, camels, and alpacas are characterized by heavy-chain-only structure and have the advantages of small proteins with the benefits of monoclonal antibody properties. Initial results showed that 76.5% of the patients treated with sonelokimab 120 mg (augmented load) achieved PASI 90 by week 12. The safety profile was consistent with IL-17 inhibitors, with Candida infections observed in 17.4% of patients.24

Oral Small Molecules

Deucravacitinib

Deucravacitinib (BMS-986165) is an oral Tyrosine kinase 2 (TYK2) selective inhibitor developed by Bristol-Myers Squibb for the treatment of moderate to severe chronic plaque psoriasis and psoriatic arthritis. In contrast to other Janus kinase (JAK), which act as ATP competitor, deucravacitinib binds to the regulatory domain of TYK2, this providing a more selective activity. Deucravacitinib inhibits IL-12, IL-23 and type 1 interferon pathways, which are implicated in the pathogenesis of psoriasis and other immune-mediated diseases.25 The results of the Phase II, randomized, double-blinded, placebo-controlled study in five different deucravacitinib dosing groups are promising. At week 12, the PASI75 was achieved by 7% of the patients in the placebo arm versus 75% with deucravacitinib 12 mg daily. AEs were reported in 55–80% of intervention groups compared to 51% in the placebo. Most common AEs included nasopharyngitis, headache, diarrhea, nausea and URTIs and acne was found more frequently in the deucravacitinib group.26 Deucravacitinib is currently investigated in moderate to severe plaque psoriasis in different phase III clinical trials versus placebo (POETYK PSO-LTE NCT04036435, POETYK PSO-3 NCT04167462) and versus apremilast (POETYK PSO-1 NCT03624127, POETYK-PSO-2 NCT03611751); in adolescent and Japanese patients (NCT04772079, NCT04772079).

Piclidenoson

Piclidenoson (CF101) is an oral agonist of the Gi protein associated A3 adenosine receptor (A3AR) developed by Can-Fite BioPharma. A3AR is highly expressed in inflammatory skin conditions and in the peripheral blood mononuclear cells. The anti-inflammatory effects may be mediated by the downregulation of the NF-κB signaling pathway, and in turn TNF-α inhibition.27 The efficacy of piclidenoson has been already demonstrated in phase II clinical studies. Results of a phase II, multicenter, double-blinded, placebo control trial involving 75 patients randomized to placebo, 1-, 2- or 4 mg piclidenoson twice a day showed that only the 2 mg group achieved improvement vs placebo in mean change of PASI at weeks 8 and 12; in particular, PASI50 was achieved by 35.3% of the 17 patients treated with 2 mg dose. AEs incidence in the 1-, 2- and 4 mg arm was 58.3%, 17.6% and 13.3%, respectively, compared to 21.1% in the placebo arm. Except one severe psoriasis exacerbation, all AEs were mild/moderate.28 Piclidenoson is currently investigated in a phase III randomized, double-blind, placebo- and active comparator (apremilast)-controlled trial (NCT03168256), but the results are not available yet.

Discussion

Psoriasis has significant and cumulative impacts on physical and psychological morbidity and health-related quality of life.29 A plethora of comorbid conditions are associated with moderate to severe psoriasis, sharing genetic predisposition and inflammatory pathways. Cardiovascular and metabolic diseases are particularly important because can potentially reduce life expectancy of the patients.30 Significant advancement in the treatment of psoriasis has been gained over the past 30 years. The advent of new medications with unique mechanisms of action affords significant opportunities for better disease control with an acceptable safety profile. Over the last 15 years, new biologicals raised progressively the therapeutic targets, from PASI 75 to PASI 90 and to absolute PASI less than 3.31 Biologicals differ in their efficacy towards cutaneous disease and joint disease as well as in their safety profiles. According to a recent network analyses with head-to-head comparisons, anti-IL-17 and anti-IL-23 agents demonstrate higher cutaneous response rates than anti-TNF-α therapies and anti-IL-12/23 across multiple endpoints and over short-term and long-term follow-up.32 Moreover, TNF-α and IL-17 inhibitors represent a first line biological treatment for psoriatic arthritis, particularly in case of involvement of the axial, tendons and entheses domains.33 Apart from piclidenoson and deucravacitinib, other oral molecules are currently being investigated in phase II clinical trials, but their place in therapy is difficult to predict. Vimirogant (VTP-43742) is a highly potent, selective, oral retinoic acid receptor-related orphan receptor gamma T (RORγ T) inverse agonist developed by Vitae Pharmaceuticals. RORγ T is required for Th17 differentiation and expression of IL-17A, IL-17F, IL-22, IL-26 and IL-23R. The results of the phase II, randomized, double-blind, placebo-controlled trial assessing Vimirogant at multiple (350 mg and 700 mg) oral doses in patients with moderate to severe psoriasis over a four-week period showed clinically relevant and statistically significant reductions in PASI score relative to baseline values. Over this period, a 30% reduction in PASI score relative to placebo was achieved by patients receiving 700 mg dose.34 Vimirogant was well tolerated, the most reported AEs were mild, mainly headache and nausea.35 Transaminase elevations were observed in four treated with the 700 mg dose group.34 Ponesimod, a sphingosine-1-phosphate receptor (S1PR1) antagonist developed by Actelion. Ponesimod blocks T cells in the secondary lymphoid tissue and prevents their infiltration in the target organs such as the skin. This drug is burdened by the rapid loss of efficacy when discontinued and by cardiologic and pneumological AEs.36 The competition between the high standard of efficacy and safety of the new monoclonal antibodies, as well as biosimilars, may limit small oral molecule space in the landscape of treatment for psoriasis. Nonetheless, the advantages provided by the route of administration may be particularly suitable for patients suffering from trypanophobia.37 In the recent years, different anti-TNF-α biosimilars allowed the dermatologist to prescribe effective biologics at a very competitive cost.38,39 Biosimilars are medications very similar to the originator approved biologic without clinically significative safety, purity, and potency differences and different only in terms of the manufacturing process, excipient and delivery device used. The biosimilars are tested versus originators through double-blind crossover design trials assessing pharmacokinetics, immunogenicity and drug safety.40 Currently, several anti-TNF-α biosimilars approved by regulatory authorities are available and other molecules (eg, ustekinumab) are being investigated in clinical trials.

Although the review is updated to the most recent available results of the clinical trials, we acknowledge that the current study may be limited given its not systematic design and because it is not assessing drugs for psoriatic arthritis.

Conclusion

Highly promising biologicals and small oral molecules are in the pipeline of the treatment of psoriasis. The systemic treatment armamentarium for psoriasis is expanding with very effective and safe drugs including emerging biosimilars that may offer an economic solution for patients without compromising on efficacy.

Abbreviations

A3AR, A3 adenosine receptor; ACR, American College of Rheumatology 20%; AE, adverse event; IGA, Investigator global assessment; KAK, Janus kinase; PASI, Psoriasis area and severity index; RORγ T, receptor-related orphan receptor gamma T; sPGA, static Physician’s Global Assessment; S1PR1, sphingosine-1-phosphate receptor; TYK, tyrosine kinase 2; URTI, upper respiratory tract infections.

Funding

The study was supported by Fondazione Cariplo, Fondazione Veronesi, Impact of COVID19 infection on patients affected by inflammatory skin diseases on immuno-suppressive therapies (COVISKIN); ID 1833073 rif. 2020-1363.

Disclosure

Francesco Bellinato has nothing to declare. Paolo Gisondi received consultation fee from AbbVie, Amgen, Almirall, Eli Lilly, Janssen, Leo Pharma, Novartis, Sanofi, Sandoz, UCB as a speaker and/or participants in advisory boards. Giampiero Girolomoni served as consultant and/or speaker for AbbVie, Abiogen, Almirall, Amgen, Biogen, Boehringer-Ingelheim, Bristol-Meyers Squibb, Celltrion, Eli-Lilly, Genzyme, Leo Pharma, Menlo therapeutics, Novartis, Pfizer, Regeneron, Samsung, Sandoz, Sanofi and UCB. The authors report no other conflicts of interest in this work.

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