A I/II Phase Clinical Study to Evaluate the Safety and Efficacy of RC288 in the Treatment of Solid Tumors

A Multicenter Phase I/II Clinical Study to Evaluate the Safety and Efficacy of RC288 for Injection in the Treatment of Locally Advanced Unresectable or Metastatic Malignant Solid Tumor.

The primary objective is to evaluate the safety and tolerability of RC288; determine the maximum tolerated dose (MTD) and/or maximum administered dose (MAD) of RC288; and determine the recommended phase 2 dose (RP2D), and assess the efficacy of RC288 at the RP2D dose;

Study Overview

• Status: Not yet recruiting
• Conditions: Solid Tumors
• Intervention / Treatment: Drug: RC288 For Injection

• Study Type: Interventional
• Enrollment (Estimated): 326
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Heping Liu; Phone Number: +8610-65384976; Email: heping.liu@remegen.com

Study Locations

• China
  • Hunan
    • Changsha, Hunan, China
      • Hunan Cancer Hospital
      • Contact: Weiqing Han; Phone Number: +86731-89762271; Email: md70210@sina.com

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

1. Voluntarily participate in this study, sign the informed consent form, and be able to adhere to the study protocol;
2. Age between 18 and 75 years (including 18 and 75 years);
3. ECOG PS score of 0 or 1;
4. Expected survival ≥12 weeks;
5. According to RECIST v1.1 criteria, based on imaging examinations, there is at least one measurable target lesion;
6. Sufficient bone marrow, liver, kidney, and blood clotting function

Exclusion Criteria:

1. Pregnant, breastfeeding, or intending to become pregnant subjects.
2. Subjects with brain metastases.
3. Subjects with unresolved toxicities from prior anti-tumor therapy not recovered to NCI-CTCAE v6.0 Grade 1.
4. Subjects with known hypersensitivity or delayed allergic reactions to any component of the investigational drug or similar drugs.
5. Subjects with acute, chronic, or symptomatic infections.
6. Subjects with uncontrolled cardiovascular diseases.
7. Subjects with confirmed or suspected interstitial lung disease (ILD), drug-related pneumonia, radiation pneumonitis, severely impaired pulmonary function, or other pulmonary diseases.
8. History of underlying pulmonary disease.
9. Subjects with a history of cirrhosis (Child-Pugh B or C class).
10. Clinically significant gastrointestinal disease.
11. Subjects with uncontrolled diabetes (HbA1c ≥ 10%).
12. Occurrence of hemorrhagic events of Grade ≥2 per NCI CTCAE (v6.0) within 4 weeks prior to screening; or clinical manifestations suggestive of a significant bleeding tendency within 4 weeks prior to screening.
13. Imaging during the screening period shows tumor invasion or involvement of vital organs, with imaging evidence judged by the investigator to indicate a risk of bleeding or fistula formation.
14. History of arterial/venous thromboembolic events within 6 months prior to the first dose.
15. Presence of pericardial effusion or cardiac tamponade, or third-space fluid accumulation that, in the investigator's judgment, cannot be stably controlled by drainage or other methods.
16. History of active autoimmune disease requiring systemic therapy within the past 2 years.
17. History of other invasive malignancies within 5 years prior to the first dose, or evidence of residual disease from any previously diagnosed malignancy.
18. History of other acquired or congenital immunodeficiency diseases, or history of organ transplantation.
19. History of or current poorly controlled psychiatric disorder.
20. Poor compliance, and patients who are expected to be unable to cooperate with the completion of trial procedures.
21. Presence of any other disease, metabolic abnormality, physical examination finding, or laboratory abnormality that, in the investigator's judgment, gives reasonable suspicion of a condition that contraindicates the use of the investigational drug, may affect the interpretation of study results, or places the patient at high risk.
22. Local or systemic diseases not caused by malignancy, or diseases or symptoms secondary to the tumor, which may lead to higher medical risks and/or uncertainty in survival assessment.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: RC288 (Phase I, dose escalation); There are six predefined escalating dose levels.	Drug: RC288 For Injection; Intravenous (IV) administration of RC288. Patients will continue treatment until unacceptable toxicities, disease progression, or any criterion for withdrawl from the study.
Experimental: RC288 (Phase II, dose expansion); In the multi-indication cohort expansion phase, further assess the efficacy and safety of RC288 in various cancer types using the RP2D.	Drug: RC288 For Injection; Intravenous (IV) administration of RC288. Patients will continue treatment until unacceptable toxicities, disease progression, or any criterion for withdrawl from the study.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Dose-Limiting Toxicity (DLT)	24 months
Incidence and severity of adverse events/serious adverse events (graded according to NCI CTCAE v6.0)	24 months
Determine RP2D of RC288	24 months
MTD and/or MAD	24 months
Prostate Cancer Cohort: Investigator assessed ORR according to RECIST v1.1 criteria and PCWG3 criteria	24 months
Non-Prostate Cancer Cohort: Investigator assessed ORR according to RECIST v1.1 criteria	24 months

Collaborators and Investigators

• Sponsor: RemeGen Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): April 30, 2026
• Primary Completion (Estimated): December 30, 2029
• Study Completion (Estimated): June 30, 2030

Study Registration Dates

• First Submitted: April 12, 2026
• First Submitted That Met QC Criteria: April 12, 2026
• First Posted (Actual): April 17, 2026

Study Record Updates

• Last Update Posted (Actual): April 17, 2026
• Last Update Submitted That Met QC Criteria: April 12, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Therapeutics; Drug Administration Routes; Drug Therapy; Injections
• Other Study ID Numbers: RC288-C101

Drug and device information, study documents

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