A Study on the Efficacy and Safety of Oral All-trans Retinoic Acid Combined With Toripalimab in TNBC.

Not Applicable

Not yet recruiting

• Conditions: Triple-negative Breast Cancer
• Interventions: Drug: ATRA; Drug: Toripalimab

• Registration Number: NCT06371274
• Lead Sponsor: First Affiliated Hospital of Zhejiang University

Brief Summary

To evaluate the clinical efficacy and safety of oral all-trans retinoic acid in combination with toripalimab in patients with locally advanced, recurrent, or metastatic triple-negative breast cancer who had failed second-line and subsequent therapy.

Detailed Description

The study is designed as a single arm, open-label, mono-center exploratory trial, aiming to evaluate the clinical efficacy and safety of oral all-trans retinoic acid in combination with toripalimab in patients with locally advanced, unresectable, recurrent, or metastatic triple-negative breast cancer who had failed second-line and subsequent standard treatme...

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Status Verified: 2024-04
• Study First Submitted: 2024-04-02
• Study First Submitted QC: 2024-04-12
• Last Update Submitted: 2024-04-12
• Study First Posted: 2024-04-17
• Last Update Posted: 2024-04-17
• Study Start: 2024-05-01
• Primary Completion: 2026-04-30
• Study Completion: 2026-04-30

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: Female
• Target Recruitment: 32

Inclusion Criteria

1. Age ≥18 years at the time of signing the informed consent form;
2. Pathologically confirmed as triple-negative breast cancer based on recent biopsy or other pathological specimens, with histological and/or cytological diagnosis;
3. Patients with unresectable locally advanced or metastatic triple-negative breast cancer who have failed at least second-line standard treatment regimens;
4. According to RECIST 1.1, at least one measurable lesion is required. Patients with only skin lesions or bone lesions are not eligible for inclusion;
5. Adequate organ and bone marrow function (not received blood transfusions, recombinant human platelet growth factor, or colony-stimulating factor treatment in the 2 weeks before screening);
6. The subject voluntarily agrees to participate in this study, signs the informed consent form, and is able to comply with the visits and related procedures specified in the protocol.

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Exclusion Criteria

1. Known symptomatic or uncontrolled brain metastasis or other central nervous system (CNS) metastases;
2. Patients with other malignant tumors, excluding those with cured basal cell or squamous cell skin carcinoma or in situ cervical cancer. Patients with other malignant tumors must have a disease-free interval of at least 5 years;
3. Any severe and/or uncontrolled concurrent illness that hinders the patient's participation in the study;
4. History of immunodeficiency, autoimmune diseases, the need for immunosuppressive therapy (daily dose >10 mg of prednisone or equivalent), or a history of chronic infections;
5. History of deep vein thrombosis or pulmonary embolism;
6. Severe osteoporosis or patients with bone metastases;
7. Participants who, within the first 4 weeks before the initiation of the study treatment or during the 5 half-lives of any drugs used in the pre-study period (whichever is shorter), have received any chemotherapy, immunotherapy, biologic therapy, or participated in other drug clinical trials, or received traditional Chinese medicine preparations for the treatment of approved anticancer indications or radiotherapy within the first 2 weeks before the initiation of the study treatment, or have undergone major surgery within the first 4 weeks before the initiation of the study treatment;
8. Patients with active hepatitis B or C; known history of human immunodeficiency virus (HIV) infection or acquired immunodeficiency syndrome (AIDS); positive syphilis antibody test;
9. History of severe drug allergies or known allergy to any component of the investigational drug as per the prescription;
10. The investigator considers the participant unsuitable for the study.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
ATRA+Toripalimab	Toripalimab	Eligible participants are subjected to take all-trans retinoic acid orally at a dose of 150 mg/m2 per day, twice a day for three consecutive days per cycle (d0\~d2), and intravenous infusion of PD-1 monoclonal antibody at a dose of 240 mg on day 1 of each cycle (d1), with cycles repeated every 3 weeks until disease progression, death, loss to follow-up, intolerable toxicity, or meeting other withdrawal or termination criteria (whichever occurs first), for a maximum duration of 2 years.
ATRA+Toripalimab	ATRA	Eligible participants are subjected to take all-trans retinoic acid orally at a dose of 150 mg/m2 per day, twice a day for three consecutive days per cycle (d0\~d2), and intravenous infusion of PD-1 monoclonal antibody at a dose of 240 mg on day 1 of each cycle (d1), with cycles repeated every 3 weeks until disease progression, death, loss to follow-up, intolerable toxicity, or meeting other withdrawal or termination criteria (whichever occurs first), for a maximum duration of 2 years.

Primary Outcome Measures

Name	Time	Method
Objective Response Rate (ORR)	up to 2 years	During the combined therapy, tumor assessment (enhanced CT) is conducted every 2 cycles (6 weeks), and the efficacy is evaluated using the RECIST 1.1 criteria. ORR will be summarized as the proportion of subjects achieving objective tumor responses (complete response or partial response). ORR and its 95% confidence interval will be calculated.

Secondary Outcome Measures

Name	Time	Method
Progression-Free Survival (PFS)	up to 2 years	PFS defined as the time from enrollment until disease progression or death (whichever occurs first).
Duration of Response (DOR)	up to 2 years	For responders (complete response or partial response), DOR is defined as the time from the earliest date meeting the response criteria to disease progression or death for any reason (whichever occurs first). For subjects who do not experience progression after meeting response criteria and continue to survive, DOR will be censored at the last evaluable tumo...
Overall Survival (OS)	up to 2 years	OS is defined as the time interval between the date of the first dose and the date of death for any reason. Kaplan-Meier methodology will be used to estimate median OS, OS rates, and their 95% confidence intervals at different time points.

Trial Locations

Locations (1)

The first affiliated hospital, Zhejiang University School of Medicine; 🇨🇳 Hangzhou, Zhejiang Province, P.R. China, China