Study of Efficacy and Safety of Secukinumab in Chinese Subjects With Active PsA Compared to Placebo.

The purpose of this study was to assess the efficacy and safety of secukinumab in Chinese participants with active Psoriatic arthritis (PsA ) compared to placebo.

This study used a randomized, double-blind, placebo-controlled, parallel-group design.

A screening period running up to 10 weeks before randomization was used to assess participant eligibility followed by 52 weeks of treatment.

A follow-up visit was done 12 weeks after last study treatment administration for all participants, regardless of whether they completed the entire study as planned or discontinued prematurely.

At Baseline, the patients fulfilling the inclusion criteria were randomized to one of the following two groups.

Group 1 : Secukinumab Dose level 1 s.c. at BSL, Week 1, 2, 3, 4, 8, and 12 Group 2 : Secukinumab Placebo s.c. at BSL, Week 1, 2, 3, 4, 8, and 12.

At Week 16, participants in Group 1 and Group 2 were to be re-randomized separately in a 1:1 ratio to receive secukinumab 150 mg or secukinumab 300 mg.

The duration of the entire treatment period was 52 weeks.

The primary objective was to demonstrate the treatment effect of secukinumab in Chinese subjects with active PsA by assessing American College of Rheumatology rresponse 20 (ACR20 response) rates at Week 16.

Eligibility Criteria:
Inclusion Criteria:

* Participant must be able to understand and communicate with the investigator and comply with the requirements of the study and must give a written, signed and dated informed consent before any study assessment is performed.
* Chinese male or non-pregnant, non-lactating Chinese female participants at least 18 years of age.
* Diagnosis of PsA classified by Classification of Psoriatic Arthritis (CASPAR) criteria and with symptoms for at least 6 months with moderate to severe Psoriatic arthritis (PsA).
* Rheumatoid factor (RF) and anti-cyclic citrullinated peptide (anti-CCP) antibodies negative at screening.
* Diagnosis of active plaque psoriasis or nail changes consistent with psoriasis or a documented history of plaque psoriasis.
* Participants on Methotrexate (MTX) must be on folic acid supplementation at randomization.
* Participants who are on a DMARD other than MTX must discontinue the DMARD 4 weeks prior to randomization visit except for leflunomide, which has to be discontinued for 8 weeks prior to randomization unless a cholestyramine washout has been performed.

Exclusion Criteria:

* Chest X-ray or chest MRI with evidence of ongoing infectious or malignant process, obtained within 3 months prior to screening and evaluated by a qualified physician
* Participants taking high potency opioid analgesics (e.g., methadone, hydromorphone, morphine).
* Previous exposure to secukinumab or other biologic drug directly targeting interleukin- 17 (IL-17) or IL-17 receptor
* Participants who have ever received biologic immunomodulating agents except for those targeting Tumor necrosis factor alpha (TNFα).
* Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, unless they are using effective contraception during the entire study (during the entire study).