IASO-782 in Systemic Lupus Erythematosus

A Phase Ib Study to the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics and Efficacy of IASO-782 in Patient With Systemic Lupus Erythematosus

his study is a randomized, double-blinded, and placebo-controlled phase Ia clinical study in subjects with SLE. The study is designed to assess the safety and tolerability of IASO-782 for the treatment of SLE.

Study Overview

• Status: Not yet recruiting
• Conditions: SLE - Systemic Lupus Erythematosus
• Intervention / Treatment: Drug: IASO-782 injection; Drug: Placebo

Detailed Description

This study is a multiple-dose escalation study in subjects with SLE. The study is designed to enroll subjects with SLE. This study will evaluate the safety and preliminary dose range of IASO-782 in subjects with SLE at the following dose levels:4mg/kg，6mg/kg and 10mg/kg.

• Study Type: Interventional
• Enrollment (Estimated): 20
• Phase: Phase 1

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

1. Aged 18 to 75 years;
2. Clinically confirmed diagnosis of SLE before screening;
3. Currently receiving standard treatment regimens, including any single drug or combination of drugs;
4. Organ function or laboratory test is basically normal;
5. Subjects with potential fertility and their partners must use effective contraceptive measures for at least 2 weeks before the first dose of the study drug, throughout the study period, and for 6 months after the end of the study (or early termination of the study);
6. Females with potential fertility must have a negative pregnancy test during the Screening Phase;
7. Voluntarily participate in the study and sign the informed consent form.

Exclusion Criteria:

1. History of other primary malignant neoplasm within 5 years of screening;
2. A history of cardiac disease within the recent 3 months, including New York Heart Association (NYHA) Class III/IV congestive heart failure and cardiac arrhythmias requiring drug treatment;
3. Subjects with poorly controlled hypertension despite drug treatment;
4. A history of hypersensitivity to any component of the study drug or its excipients confirmed before screening;
5. Presence of active infection requiring intravenous drug treatment within 30 days before screening;
6. Pregnant or lactating females;
7. Participation in any other clinical trial within 28 days before randomization or within 5 half-lives of the study drug in the other trial (whichever is longer);
8. Previous treatment drugs have not been adequately washed out;
9. A previous history of any arterial or venous thrombosis (stroke, transient ischemic attack, myocardial infarction, deep vein thrombosis or pulmonary embolism), or clinical symptoms and medical history suggesting thrombophilia; or any of the following: cardiac arrhythmias known to increase the risk of thrombotic events (e.g., atrial fibrillation), or a corrected QT interval (QTc) >450 msec in the subject; or a history of other coagulation abnormalities;
10. Confirmed diagnosis of severe lupus nephritis within 8 weeks before screening (defined as urine protein >6 g/24 hours or serum creatinine >2.5 mg/dL or 221 μmol/L), or requiring treatment with study-prohibited drugs, or having active nephritis requiring prednisone ≥100 mg/day or equivalent glucocorticoid for ≥14 days; active severe or unstable neuropsychiatric SLE, including but not limited to poorly controlled seizures, psychosis or acute confusional state, cerebrovascular accident, demyelinating syndrome, cranial nerve palsy, or evidence of active central nervous system vasculitis within 12 weeks before the screening visit;
11. Hepatitis B virus (HBV) infection during the Screening Phase (if HBsAg is positive, or HBsAg is negative but anti-HBc is positive, HBV-DNA testing is required, and the subject will be excluded if viral replication is indicated); positive anti-hepatitis C virus (HCV) antibody with positive peripheral blood HCV RNA; positive human immunodeficiency virus (HIV) antibody; positive specific treponema pallidum antibody with positive rapid plasma reagin test;
12. Tuberculosis (TB) infection: TB testing will be appropriately performed during screening according to local clinical practice. Subjects with active tuberculosis will be excluded, except for those with latent TB who are judged by the investigator to be eligible for the study;
13. A history of substance abuse or mental disorders;
14. Any other medical history or condition judged by the investigator to be unsuitable for study participation.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Experimental group; Drug:IASO-782 injection Dosage and Administration: single dose of IASO-782,4mg/kg ，6 mg/kg or 10 mg/kg , intravenous injection at day 1,day 8 and day15.	Drug: IASO-782 injection; Each subject will be given only one dose of IASO-782. Subjects should avoid strenuous exercise within 48 h before administration and remain seated or semi-recumbent (except for necessary activities) for 4 h after administration. IASO-782 solution for injection or placebo was diluted in 0.9% sodium chloride injection (corresponding to the dose administered according to the body weight at baseline and the dose group) with a total volume of 250 mL, administered as a single intravenous drip at a drip rate recommended by the drug manual on the day of administration, The infusion time is about 90 minutes (± 15 minutes).
Placebo Comparator: Control group; Drug:placebo Dosage and Administration: single dose of placebo, intravenous injection at day 1,day 8 and day 15.	Drug: Placebo; Each subject will be given one dose of placebo. Subjects should avoid strenuous exercise within 48 h before administration and remain seated or semi-recumbent (except for necessary activities) for 4 h after administration. IASO-782 solution for injection or placebo was diluted in 0.9% sodium chloride injection (corresponding to the dose administered according to the body weight at baseline and the dose group) with a total volume of 250 mL, administered as a single intravenous drip at a drip rate recommended by the drug manual on the day of administration, The infusion time is about 90 minutes (± 15 minutes).

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of participants with adverse events as assessed by CTCAE v6.0	The safety and tolerability of IASO-782 will be assessed primarily by summarizing treatment-emergent AEs and SAEs.	up to 25 weeks

Collaborators and Investigators

• Sponsor: Shanghai IASO Biotechnology Co., Ltd

Study record dates

Study Major Dates

• Study Start (Estimated): April 30, 2026
• Primary Completion (Estimated): August 31, 2027
• Study Completion (Estimated): May 31, 2028

Study Registration Dates

• First Submitted: March 16, 2026
• First Submitted That Met QC Criteria: March 16, 2026
• First Posted (Actual): March 19, 2026

Study Record Updates

• Last Update Posted (Actual): March 19, 2026
• Last Update Submitted That Met QC Criteria: March 16, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Connective Tissue Diseases; Autoimmune Diseases; Immune System Diseases; Skin and Connective Tissue Diseases; Lupus Erythematosus, Systemic
• Other Study ID Numbers: IASO-782C004

Drug and device information, study documents

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