Study of ADCs Combined With Adebrelimab in HER2-negative Advanced Breast Cancer

Advanced Breast Cancer Clinical Trial

Official title:

A Phase II Study of Antibody-Drug Conjugates (ADCs) Combined With Adebrelimab in HER2-negative Advanced Breast Cancer

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06433609
• Other study ID #: BJGBYY-IIT-LCYJ-2024-008
• Secondary ID: BC-MUL-IIT-ADC-S
• Status: Not yet recruiting
• Phase: Phase 2
• Start date: June 2024
• Est. completion date: November 2027

Study information

• Verified date: May 2024
• Source: Beijing GoBroad Hospital
• Contact: Yang Ke
• Phone: +86-13592618724
• Email: key3[@]gobroadhealthcare.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Our study is aimed to evaluate the efficacy and safety of novel ADCs named SHR-A1811 and SHR-A1921 combined with adebrelimab in HER2-negative advanced breast cancer.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 131
• Est. completion date: November 2027
• Est. primary completion date: July 2027
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

1. 18 years to 75 years old (including boundary values), female patients with breast cancer;

2. ECOG PS Score: 0~1;

3. Histologically or cytologically confirmed HER2-negative advanced breast cancer;

4. Disease progression after prior 1-2 lines of systemic therapy; if HR-positive, prior CDK4/6 inhibitor is necessary;

5. Based on RECIST v1.1, at least one measurable lesion;

6. Brain metastasis with no clinical symptoms, or treated, stable brain metastases are eligible;

7. No prior PD-(L)1 inhibitor;

8. Patients must have a life expectancy = 6 months;

9. Adequate organ function and marrow function (no corrective treatment within 14 days before first dose);

10. Patients of childbearing potential should have a negative urine or serum pregnancy, and must promise to use an adequate method of contraception starting with the first dose of study therapy through 6 months after the last dose of study therapy or be celibate;

11. Available blood samples for ctDNA detection in the exploratory study;

12. Willing and able to provide written informed consent and comply with the requirements and restrictions in the protocol.

Exclusion Criteria:

1. Has known active brain metastasis which needs local therapy immediately;

2. Prior anti-HER2 or anti-TROP-2 treatment;

3. Has received or been receiving PD-(L)1 inhibitors and/or ADC containing a topoisomerase inhibitor-like payload;

4. Existence of third space fluid that is not well controlled by effective methods, e.g. drainage;

5. Has received antitumor surgery, radiotherapy, chemotherapy, targeted therapy or immunological therapy within 4 weeks before first dose of study therapy; has received antitumor endocrine therapy within one week before first dose of study therapy;

6. Use of other antitumor systemic treatment during the study;

7. Has active autoimmune disease or a history of autoimmune disease;

8. Known history of immunodeficiency, including HIV-positive, other acquired or innate immunodeficient disease, or known history of organ transplantation;

9. Has active hepatitis B (HBsAg-positive and HBV DNA=500 IU/mL), hepatitis C (positive for HCV antibody and HCV RNA above ULN) and hepatic cirrhosis;

10. Has an active infection requiring antibiotics, antiviral or antifungal treatment, or pyrexia >38.5? of unknown origin during the screening period before first dose of study therapy (patients with pyrexia due to cancer could be enrolled determined by investigator);

11. Receiving immunosuppressive medication, or systemic corticosteroid therapy for the purpose of immunosuppression (prednisone at >10mg/d or equivalent dose of other corticosteroids), and continuous use within 2 weeks before the first dose of study therapy;

12. Other malignancy within prior 5 years unless curatively treated with no evidence of disease for at least recent 3 years, except: curatively treated in situ cancer of the cervix, skin basal cell carcinoma or skin squamous cell carcinoma;

13. Hypersensitivity to study therapy or any of its excipients;

14. Has known clinically significant lung disease, including but not limited to:

interstitial lung disease, pneumonitis, pulmonary fibrosis;

15. Known history of uncontrolled cardiovascular clinical symptom or disease that is not well controlled;

16. Has received a live vaccine within 4 weeks before first dose of study therapy, or potential to receive a live vaccine during the trial treatment;

17. Patients with a positive serum or urine pregnancy test or who are breastfeeding; patients of childbearing potential who are unwilling or not available to use an effective method of contraception;

18. Other conditions that might influence the study and analysis of results in the opinion of the investigator.

Related Conditions & MeSH terms

• Advanced Breast Cancer
• Breast Neoplasms

Intervention

Drug:
• SHR-A1811
Via intravenous infusion
• SHR-A1921
Via intravenous infusion
• Adebrelimab
Via intravenous infusion

Locations

Country	Name	City	State
China	Beijing GoBroad Hospital	Beijing	Beijing

Sponsors (1)

Lead Sponsor	Collaborator
Beijing GoBroad Hospital

Country where clinical trial is conducted

China, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	ORR (objective response rate) by investigator	ORR is the percentage of evaluable patients with a confirmed investigator-assessed response of CR (complete response) or PR (partial response) per RECIST v1.1.	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 3.5 years
Secondary	DCR (disease control rate) by investigator	DCR is the percentage of evaluable patients with a confirmed investigator-assessed response of CR (complete response), PR (partial response) or SD (stable disease) per RECIST v1.1.	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 3.5 years
Secondary	CBR (clinical benefit rate) by investigator	CBR is the percentage of evaluable patients with a confirmed investigator-assessed response of CR (complete response), PR (partial response) or SD lasting=24 weeks (stable disease) per RECIST v1.1.	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 3.5 years
Secondary	DoR (duration of response)	DoR is the time from the date of first detection of objective response (which is subsequently confirmed) until the date of objective radiographic disease progression.	up to 3.5 years
Secondary	PFS (progression-free survival)	PFS is the time from the date of first dose until the date of objective radiographic disease progression or death (by any cause in the absence of progression).	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 3.5 years
Secondary	OS (overall survival)	OS is the time from the date of first dose until the date of death by any cause.	up to 3.5 years
Secondary	Safety as assessed by percentage of patients with any Adverse Event (AE)	An AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. Percentage of participants who experienced an adverse event and discontinued study drug due to an AE.	up to 3.5 years