Comparative Study of CMAB015 and Secukinumab for Patients With Moderate to Severe Plaque Psoriasis

The goal of this trial is to assess whether the efficacy of CMAB015 is similar to that of Secukinumab in patients with moderate-severe chronic plaque psoriasis. It will also learn about the similarity of CMAB015 and Secukinumab in terms of safety and immunogenicity in patients with moderate-severe chronic plaque psoriasis. The main question it aims to answer is:

In subjects with moderate to severe plate psoriasis treated with CMAB015, Is the proportion of patients achieving a 75% improvement in PASI (Psoriasis area and severity index) scores relative to baseline (PASI 75) the same as those treated with Secukinumab?

Participants will:

Receive treatment with 300 mg CMAB015 or Secukinumab by subcutaneous injection at weeks 0, 1, 2, 3, 4, and 8, followed by every 4 weeks until week 48.

Visit the clinic at weeks 0, 1, 2, 3, 4, and 8, followed by every 4 weeks until week 52.

Be evaluated with PASI scores, body surface area (BSA) scores and investigator's global assessment (IGA) (mod 2011) scores.

This study was a multicenter, randomized, double-blind, secukinumab controlled, 1:1 ratio parallel grouping, equivalent design. The study treatment period would be 52 weeks, including a 12-week induction therapy period and a 40-week maintenance therapy period. The primary endpoint was the proportion of patients achieving at least a 75% improvement in PASI scores from baseline at 12 weeks, with an equivalence cut-off of ±15%. A total of 336 adult patients with moderate-to-severe plaque psoriasis are planned to be enrolled, with 168 cases in each group. Eligible subjects received 300 mg CMAB015 or Secukinumab subcutaneous injection. Patients who do not achieve at least a 50% improvement in PASI scores at week 12 would withdraw from the study, and patients who achieve a 50% improvement continue on maintenance therapy until the last treatment at week 48.

This study is a double-blind design, and a central randomization system woud be used to randomize subjects. The control factors for randomization are body weight (\<60 kg, ≥60 kg), prior treatment (prior systemic therapy with no prior biologics, prior systemic therapy with biologics), concomitant psoriatic arthritis (yes, no), and PK intensive sampling (yes, no).

Eligibility Criteria:
Inclusion Criteria:

* History of confirmed moderate-severe plaque psoriasis for at least 6 months before randomization.
* PASI scores≥12, IGA (mod 2011) scores ≥3 and BSA≥10% at screening and randomization.
* With indications for phototherapy or systemic therapy.
* Voluntarily sign informed consent.

Exclusion Criteria:

* Presented with pustular psoriasis, erythrodermic psoriasis，guttate psoriasis or psoriasis triggered by medicine at screening.
* Active persistent cutaneous inflammatory disease other than psoriasis at randomization.
* Treatment with phototherapy, including but not limited to ultraviolet A phototherapy (with or without psoralen), ultraviolet B phototherapy, or excimer laser within 4 weeks prior to randomization. Patients who are unwilling to avoid excessive UV exposure within 4 weeks prior to randomization and during this trial.
* Use of systemic treatment with anti-psoriasis non-biologic agents within 4 weeks prior to randomization, including but not limited to glucocorticoids, retinoids, cyclosporine, methotrexate, azathioprine, leflunomide, mycophenolate mofetil, tofacitinib, apremilast, traditional Chinese medicine/proprietary Chinese medicine, etc.
* Intra-articular glucocorticoid injection within 4 weeks or 5 drug half-lives (whichever is longer) prior to randomization.
* Topical anti-psoriasis treatment within 2 weeks prior to randomization.
* Prior treatment with the following biologic agents for the treatment of psoriasis within the specified time period prior to randomization: ustekinumab\<6 months, Adalimumab, Etanercept, Infliximab, Golimumab, Guselkumab\<12 weeks, Rituximab\<12 months, or any other biological agent\< 5 half lives.
* Prior treatment with anti-IL-17 antibody or anti-IL-17 receptor antibody.
* Meets any of the following at screening: haemoglobin\<80 g/L, white blood cell\<3×10E9/L, Neutrophils\<1.5×10E9/L, platelet\<75×10E9/L, alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) and/or total bilirubin (TBiL)\>2 times the upper limit of normal (ULN), serum creatinine (Scr)\>1.5 ULN.
* History of inflammatory bowel disease or other disease with a high risk of perforation or other active autoimmune disease.
* Systemic infection or serious infection requiring hospitalization and/or intravenous anti-infective therapy within 4 weeks prior to randomization; any active infection within 2 weeks prior to randomization, with the exception of general upper respiratory tract infection.
* Have Received a live vaccine within 12 weeks prior to randomization, or plan to receive a live vaccine during the study or within 6 months after the last dose.
* Previously diagnosed or ongoing lymphoproliferative disorders. Malignant tumors within 5 years prior to screening, excluding squamous cell carcinoma of the skin or basal cell carcinoma or unflavored cervical cancer that have been cured after treatment.
* History of depression and/or any finding of suicidal ideation before randomization.
* Concomitant progressive or uncontrolled cardiovascular and cerebrovascular diseases, respiratory, hepatic, renal, gastrointestinal, endocrine, hematologic, and neurological diseases, which are judged by the investigators to be inappropriate for participation in this study;
* Positive for any of the followings: hepatitis B virus surface antigen, hepatitis C virus antibody ,human immunodeficiency virus antibody, treponema pallidum antibody.
* Latent or active tuberculosis.
* Allergy to anti-IL-17 antibody active ingredients, excipients or latex.
* Pregnant or nursing women. Male or female patients who are unwilling to use effective contraception during the trial and for 5 months after the last dose
* Participated in other drug clinical trials within 3 months or 5 drug half-lives (whichever is longer) before screening.
* Any major surgery within 8 weeks prior to randomization, or planned major surgery during the study.
* History of recurrent drug abuse or unprescribed medication, or history of alcohol abuse.
* Other conditions judged by the investigator to be inappropriate to participate in this study.