To Evaluate the Efficacy and Safety of SG301 SC Injection in Systemic Lupus Erythematosus

April 1, 2026 updated by: Hangzhou Sumgen Biotech Co., Ltd.

A Randomized, Double-Blind, Placebo-Controlled Phase 2 Clinical Study to Evaluate the Efficacy and Safety of SG301 SC Injection in Patients With Systemic Lupus Erythematosus

This was a multicenter, randomized, double-blind, placebo-controlled Phase 2 clinical study. The primary objective was to evaluate the efficacy of SG301 SC injection in participants with Systemic Lupus Erythematosus (SLE) based on the Systemic Lupus Erythematosus Responder Index -4 (SRI-4) response rate. The secondary objectives were to assess the safety, pharmacokinetics, pharmacodynamics, and immunogenicity profiles of SG301 SC injection in these participants .

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This was a multicenter, randomized, double-blind, placebo-controlled Phase II clinical study. The primary objective was to evaluate the efficacy of SG301 SC Injection in participants with systemic lupus erythematosus (SLE) as assessed by the SRI-4 score. The secondary objectives included assessing the safety, pharmacokinetics, pharmacodynamics, and immunogenicity profiles of SG301 SC injection in these participants.

Eligible participants were those diagnosed with SLE in accordance with the 2019 European League Against Rheumatism (EULAR)/American College of Rheumatology (ACR) classification criteria, with a Systemic Lupus Erythematosus Disease Activity Index - 2000 (SLEDAI-2K )score of ≥ 8 points and seropositivity for antinuclear antibody (ANA) or anti-double-stranded DNA (anti-dsDNA) antibody at the screening visit.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
120

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China
        • Recruiting
        • Peking University People's Hospital
        • Contact:
          • Zhanguo Li, Doctor
          • Phone Number: +86-010-88378021
        • Contact:
          • Yue Yang, Doctor
          • Phone Number: +86-010-88378021

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Voluntarily participate in the clinical study and sign a written informed consent form.
  2. Participants must be diagnosed with SLE in accordance with the 2019 European League Against Rheumatism (EULAR)/American College of Rheumatism (ACR) SLE classification criteria and have inadequate response to standard treatment, intolerance to standard treatment, or recurrent disease.
  3. SLEDAI-2K score ≥ 8 points, with clinical features corresponding to a SLEDAI-2K score ≥ 4 points.
  4. Positive serological test results for autoantibodies, defined as antinuclear antibody (ANA) positivity and/or anti-double-stranded DNA (anti-dsDNA) antibody positivity.
  5. Body weight ≥ 35 kg.
  6. Must have received standard treatment for at least 8 weeks before the first dose and maintained a stable dose of the treatment unchanged for at least 4 weeks before the first dose.
  7. Participants of childbearing potential or whose partners are of childbearing potential must agree to use effective contraceptive measures throughout the entire study period and within 6 months after the last dose.

Exclusion Criteria:

  1. Previous use of CD38 or monoclonal antibodies targeting CD38.
  2. Active central nervous system (CNS) disease within 2 months before the first dose, or CNS disease that the investigator believes may require treatment with prohibited therapies specified in the protocol.
  3. Diagnosis of mixed connective tissue disease or a history of any overlap syndrome between SLE and systemic sclerosis.
  4. Laboratory abnormalities.
  5. Current acute or chronic infection meeting any of the following criteria.
  6. Participation in any other clinical trial within 4 weeks before the first dose (excluding participants who provided informed consent but did not receive trial treatment, or only received placebo).
  7. Use of any targeted T or B lymphocyte drugs (e.g., rituximab) within 3 months before the first dose.
  8. Receipt of any B cell-depleting drugs (such as belimumab, telitacicept) within 4 weeks or 5 half-lives (whichever is shorter) before the first dose.
  9. Receipt of JAK inhibitor treatment within 2 weeks before the first dose.
  10. Presence of severe cardiovascular and cerebrovascular diseases.
  11. Mycobacterium tuberculosis infection.
  12. Presence of HIV infection, active hepatitis B, or hepatitis C.
  13. Known history of active syphilis.
  14. History of major organ transplantation (e.g., heart, lung, kidney, liver) or hematopoietic stem cell/or bone marrow transplantation.
  15. Other conditions that the investigator believes would prevent the participant from participating in the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: SG301 SC - A
SG301 SC Injection
Drug: SG301 SC Injection
One injection per week for 8 doses, followed by one injection every two weeks for another 8 doses, with a total of 16 injections administered.
Drug: SG301 SC Injection
One injection per week for 8 doses, followed by one injection every two weeks for another 8 doses, with a total of 16 injections administered, among which 2 injections are placebos
Experimental: SG301 SC -B
SG301 SC Injection
Drug: SG301 SC Injection
One injection per week for 8 doses, followed by one injection every two weeks for another 8 doses, with a total of 16 injections administered.
Drug: SG301 SC Injection
One injection per week for 8 doses, followed by one injection every two weeks for another 8 doses, with a total of 16 injections administered, among which 2 injections are placebos
Placebo Comparator: Placebo
SG301 SC Placebo
Drug: SG301 SC placebo
One injection per week for 8 doses, followed by one injection every two weeks for another 8 doses, with a total of 16 injections administered.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Proportion of subjects achieving Systemic Lupus Erythematosus Responder Index -4 (SRI-4)
Time Frame: From baseline to week 25

SRI-4 response is defined as:

  • Systemic Lupus Erythematosus Disease Activity Index - 2000 (SLEDAI-2K) reduction from baseline of ≥ 4 points;
  • No British Isles Lupus Assessment Group-2004 (BILAG-2004) worsening, defined as ≥ 1 new A or ≥ 2 new B items compared to baseline;
  • No worsening in Physician's Global Assessment (PGA), defined as an increase of ≥ 0.3 from baseline;
From baseline to week 25

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Hangzhou Sumgen Biotech Co., Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 26, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 30, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 25, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 25, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 4, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 2, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 1, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CSG-301 SC-205

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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