A Study to Extend Efficacy and Safety of SHR-1819 Injection in Adult Patients With Moderate to Severe Atopic Dermatitis

A Multicenter, Open-label, Extended Study Evaluating the Safety and Efficacy of SHR-1819 Injection in Adult Subjects With Moderate to Severe Atopic Dermatitis Who Have Previously Participated in SHR-1819 Studies for the Treatment of Atopic Dermatitis

This study is a multicenter, open-label, extended study to evaluate the safety, efficacy, pharmacokinetics, and immunogenicity of SHR-1819 injection in adult subjects with moderate to severe atopic dermatitis who have previously participated in the SHR-1819 injection study for atopic dermatitis (defined as the main study, referred to as the main study hereinafter).

Study Overview

• Status: Enrolling by invitation
• Conditions: Moderate to Severe Atopic Dermatitis
• Intervention / Treatment: Drug: SHR-1819 injection

• Study Type: Interventional
• Enrollment (Estimated): 240
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Guangchao Dong; Phone Number: 0518-82342973; Email: guangchao.dong@hengrui.com

Study Locations

• China
  • Shanghai
    • Shanghai, Shanghai, China, 200040
      • Huashan Hospital，Fudan University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. The age of 18~75 years old at the time of signing the informed consent form (including the values at both ends), gender is not limited；
2. Previous atopic dermatitis, (1) participation in a complete main study; or (2) subjects who prematurely terminate primary study therapy for reasons other than SHR-1819 injection are required to complete a last safety follow-up or withdrawal from the visit, and the investigator assesses that the influencing factor has been eliminated/no longer affects the participant's participation in the extended study. Participants were required to meet the main study inclusion criteria for the main study；
3. Be able to apply a topical emollient (moisturizer) continuously for at least 7 consecutive days before the first dose and continue to use it for the duration of the study;
4. Be able to sign informed consent forms, understand and agree to follow the requirements of the study and the trial process.

Exclusion Criteria:

1. Pregnant or lactating women；
2. Female subjects of childbearing potential and male subjects whose partners are women of childbearing age have a plan to donate sperm/eggs from the signing of the informed consent form until 3 months after the last dose of the trial drug, or refuse to comply with the relevant contraceptive requirements;
3. A history of alcohol abuse or illicit drug abuse within 6 months prior to screening;
4. Hypersensitivity to the study drug or any ingredient in the study drug；
5. Diagnosed within 6 months prior to screening or judged by the investigator to have a suspected immunosuppressive disease;
6. Oral or parenteral systemic antimicrobials are used within 2 weeks before the first dose；
7. Suspected or confirmed active tuberculosis (TB);
8. Have malignancy or history of malignancy prior to screening；
9. Major surgery was performed within 3 months prior to screening, or major surgery was planned during the study；
10. There are currently significant abnormal laboratory test results, severe concomitant diseases, and other circumstances that the investigator considers inappropriate to participate in this trial;
11. There were treatment-related adverse events leading to discontinuation of treatment and study drug-related SAEs in the main study, and the investigator or sponsor medical department considered that continuing to participate in extended therapy would pose an unacceptable safety risk to participants.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: SHR-1819 injection	Drug: SHR-1819 injection; SHR-1819 injection 300 mg Q2W

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Treatment Emergent Adverse Events (TEAEs) (per person-year)	Up to 60 weeks

Secondary Outcome Measures

Outcome Measure	Time Frame
Serious Adverse Event (SAE) during treatment (per person-year)	Up to 60 weeks
Adverse Events of Special Interest (AESI) during treatment (per person-year)	Up to 60 weeks
Proportion of participants with a Global Assessment (IGA) score of 0 or 1 (0-4 scale) per visit	Up to 60 weeks
Time to first remission (remission defined as IGA = 1 or 0 after treatment) in this study (for participants visiting 2 baseline IGAs ≥2)	Up to 60 weeks
Proportion of participants with at least 1 remission in this study	Up to 60 weeks
Time to first relapse in this study (relapse defined as IGA = 3 or 4 points after remission) (for participants with Visit 2 baseline IGA ≥ 2)	Up to 60 weeks
The concentration of SHR-1819 in serum :Cmax	From the beginning of administration to the 60h week
Immunogenic endpoint: evaluate the incidence and timing of ADA positivity for SHR-1819	From the beginning of administration to the 60th week

Collaborators and Investigators

• Sponsor: Shanghai Hengrui Pharmaceutical Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Actual): September 6, 2023
• Primary Completion (Estimated): May 30, 2025
• Study Completion (Estimated): May 30, 2025

Study Registration Dates

• First Submitted: August 22, 2023
• First Submitted That Met QC Criteria: August 22, 2023
• First Posted (Actual): August 28, 2023

Study Record Updates

• Last Update Posted (Actual): November 14, 2023
• Last Update Submitted That Met QC Criteria: November 12, 2023
• Last Verified: November 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Skin Diseases; Immune System Diseases; Hypersensitivity, Immediate; Genetic Diseases, Inborn; Skin Diseases, Genetic; Hypersensitivity; Skin Diseases, Eczematous; Dermatitis; Eczema; Dermatitis, Atopic
• Other Study ID Numbers: SHR-1819-203

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No