A Dose-escalation Study Followed by a Dose Optimal Study to Evaluate the Safety and Efficacy of CID-103 in Adults With Chronic Immune Thrombocytopenia

NCT ID: NCT07017725

Last Updated: 2025-06-12

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: PHASE1/PHASE2
• Total Enrollment: 75 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-01-03
• Study Completion Date: 2026-12-30

Brief Summary

The goal of the global Phase 1/2 clinical trial is to evaluate whether CID-103, a novel anti-CD38 monoclonal antibody, is safe and effective in adults with chronic immune thrombocytopenia (ITP). The main questions the study aims to answer are:

• To evaluate the safety and tolerability of CID-103 in subjects with ITP with different increasing doses of CID-103.
• To further evaluate the safety and tolerability of CID-103 at two or three dose levels and to select an optimal dose and administration regimen for CID-103 for further study of clinical efficacy.

The study will be done in two parts:

Part A will test increasing doses of CID-103 to see how safe it is and how well people tolerate it. Researchers will also aim to find a safe dose range.

Part B will compare up to three different doses of CID-103 to see how well the medicine works and gather more safety and efficacy information. The goal is to find the optimal dose to use in future studies.

CID-103 is given through an intravenous (IV) infusion. During the study, participants may receive treatment for up to 6 months, followed by a post-treatment safety follow-up period to check for ongoing safety and effectiveness.

This study is an important step toward developing a new treatment for people living with chronic ITP. If CID-103 is found to be safe and effective, it could offer a new option for patients who do not respond well to current therapies.

Conditions

Chronic Immune Thrombocytopenia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Part B (Randomized Dose Exploration) high-dose cohort

Each participant will receive selected high-dose. Once approximately 8 evaluable subjects per arm have completed approximately six weeks of treatment, an initial review of safety and efficacy will be conducted by the SMC to determine if there is one or more sub-optimal dose(s) that should be closed to further recruitment or if dose / regimens require adjustment.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part B (Randomized Dose Exploration) intermediate-dose cohort

Each participant will receive selected intermediate-dose. Once approximately 8 evaluable subjects per arm have completed approximately six weeks of treatment, an initial review of safety and efficacy will be conducted by the SMC to determine if there is one or more sub-optimal dose(s) that should be closed to further recruitment or if dose / regimens require adjustment.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part B (Randomized Dose Exploration) low-dose cohort

Each participant will receive selected low-dose. Once approximately 8 evaluable subjects per arm have completed approximately six weeks of treatment, an initial review of safety and efficacy will be conducted by the SMC to determine if there is one or more sub-optimal dose(s) that should be closed to further recruitment or if dose / regimens require adjustment.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part A (Dose Escalation) Cohort 1- 30 mg/30 mg

This is the initial dose cohort with accelerated dose escalation design. If a Grade ≥ 2 AE is reported in the cohort, the cohort will expand to three subjects and the study will then convert to a standard 3+3 design.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part A (Dose Escalation) Cohort 1- 30 mg/150 mg

This is the second dose cohort with accelerated dose escalation design. If a Grade ≥ 2 AE is reported in the cohort, the cohort will expand to three subjects and the study will then convert to a standard 3+3 design.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part A (Dose Escalation) Cohort 1- 150 mg/300 mg

This is the third dose cohort with accelerated dose escalation design. If a Grade ≥ 2 AE is reported in the cohort, the cohort will expand to three subjects and the study will then convert to a standard 3+3 design.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part A (Dose Escalation) Cohort 1- 150 mg/600 mg

This is the fourth dose cohort with standard 3+3 design.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Part A (Dose Escalation) Cohort 1- 150 mg/900 mg

This is the fifth dose cohort with standard 3+3 design.

Group Type: EXPERIMENTAL

CID-103

Intervention Type: DRUG

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Interventions

CID-103

Strength:20 mg/mL. Route of administration: IV infusion. Treatment duration: QW for 6 weeks, then at the same dose Q2W up to Week 12. If treatment continues after Week 12, dosing will occur monthly for up to a maximum treatment duration of six months.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Male or female individuals aged 18 to 65 years at time of signing of ICF. Disease-related.

2. Diagnosed with ITP that has persisted for ≥ 3 months, diagnosed in accordance with The American Society of Hematology 2019 Guidelines for Immune Thrombocytopenia or the Updated International Consensus Report on the Investigation and Management of Primary Immune Thrombocytopenia (as locally applicable).

3. Diagnosis of ITP supported by a prior response to an ITP treatment (other than a thrombopoietin receptor agonists [TPO-RA]) that achieved a platelet count of ≥ 30 x 10^9/L and a doubling of baseline measurement.

4. Has received at least two lines of SOC systemic treatment (i.e., corticosteroids and one other agent).

5. Has a mean platelet count ≤ 35 x 10^9/L on at least two measurements at least one week apart during screening.

6. If receiving standard background treatment for ITP, treatment should be stable in dose and frequency for at least four weeks prior to first dose of CID-103.

7. Adequate organ function.

8. Contraception: Female participants must either be non-pregnant or not breastfeeding and must have a negative pregnancy test. Male and female participants must meet the contraceptive requirements.

Exclusion Criteria

1. Prior treatment with any anti-CD38 agent, or has been treated with anti-Bruton's tyrosine kinase (BTK), neonatal Fc receptor (FcRn) antagonist or complement inhibitor within three months prior to first dose of CID-103.

2. Use of IV immunoglobulin, subcutaneous immunoglobulin or anti-D immunoglobulin treatment within four weeks of screening.

3. Treatment with rituximab or splenectomy within the three months prior to first dose of CID-103.

4. Use of anticoagulants or any drug with antiplatelet effect (such as aspirin) within three weeks before screening.

5. Receiving other concurrent investigational therapies or have received investigational therapies within four weeks of the first dose of CID-103 or five half-lives (if shorter).

6. Active hemolytic anemia.

7. Diagnosed with severe chronic obstructive pulmonary disease (COPD), Global Initiative for Chronic Obstructive Lung Disease (GOLD Stage 3 or 4) or asthma.

8. Has been diagnosed with myelodysplastic syndrome or other active malignancy.

9. Known / clinically significant amyloidosis.

10. Has a history of any thrombotic or embolic event within six months before screening.

11. A history or evidence of cardiovascular risk including left ventricular ejection fraction < 50%, clinically significant uncontrolled ventricular arrhythmia, acute coronary syndrome history, coronary angioplasty or stenting within six months, current ≥ Class III congestive heart failure (NYHA guidelines), and treatment refractory hypertension.

12. Clinically significant medical history or ongoing chronic illness.

13. Known active infection with hepatitis B (HBV) (surface antigen) or infection with hepatitis C (HCV) in absence of sustained virologic response.

14. History of known or suspected immunosuppression.

15. Known active infection with human immunodeficiency virus (HIV) and CD4+ T cell count < 350/μL.

16. Karnofsky Performance Status ≤ 70.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

CASI Pharmaceuticals, Inc.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Junping Chen

Role: STUDY_CHAIR

CASI pharmaceutical, Inc

Locations

North China University of Science and Technology Affiliated Hospital

Tangshan, Hebei, China

Site Status: RECRUITING

Henan Cancer Hospital

Zhengzhou, Henan, China

Site Status: NOT_YET_RECRUITING

The First Affiliated Hospital of Nanchang University

Nanchang, Jiangxi, China

Site Status: NOT_YET_RECRUITING

Qilu Hospital of Shandong University

Jinan, Shandong, China

Site Status: NOT_YET_RECRUITING

Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences

Tianjin, Tianjin Municipality, China

Site Status: RECRUITING

The Second Affiliated Hospital of Kunming Medical University

Kunming, Yunnan, China

Site Status: NOT_YET_RECRUITING

Countries

China

Central Contacts

Aaron Yang

Role: CONTACT

aarony@casi.cn

+86 01 65618789

Facility Contacts

Zhenyu Yan

Role: primary

hbyzy2011@163.com

+86 0315-5826365

Hu Zhou

Role: primary

papertigerhu@163.com

+86 400 0371 818

Ruibin Huang

Role: primary

rbhuang69@163.com

+86 0791-88692748

Jun Peng

Role: primary

junpeng88@sina.com

+86 0531-82168888

Lei Zhang

Role: primary

zhanglei1@ihcams.ac.cn

+86 022-239099

Zeping Zhou

Role: primary

zhouzeping@kmmu.edu.cn

+86 0871-65351281

Other Identifiers

CTR20244168

Identifier Type: REGISTRY

Identifier Source: secondary_id

CASI-CID-103-201

Identifier Type: -

Identifier Source: org_study_id