A Trial of HRS-6209 in Combination With Fulvestrant, Letrozole, HRS-8080, or HRS-1358 in Breast Cancer Patients

NCT06555068 | Recruiting Phase 1

• 1 other identifier: HRS-6209-201
• Study Type: interventional
• Target: 528
• Locations: 1 country
• Sites: 1

Brief Summary

The study is being conducted to evaluate the safety, PK and efficacy of HRS-6209 in Combination with Fulvestrant, Letrozole, HRS-8080, or HRS-1358 for advanced unresectable or metastatic breast cancer

Conditions

Advanced Unresectable or Metastatic Breast Cancer

Outcome Measures

Primary Outcomes (5)

• DLT (dose-limiting toxicity)-Stage I (dose exploration)

  28 days after the first dose

• MTD (maximum tolerated dose) -Stage I (dose exploration)

  28 days after the first dose

• RP2D (recommended phase II dose) -Stage I (dose exploration)

  28 days after the first dose

• (Serious) AEs-Stage I (dose exploration)

  every week in Cycle 1 (28 days after the first dose), every 2 weeks in Cycle 2 (28 days after the second dose), every 4 weeks from Cycle 3 and thereafter (28 days after each dose), lasting about one year

• ORR ( objective response rate )-Stage II (efficacy expansion)

  every 8 weeks lasting about one year

Secondary Outcomes (18)

• Cmax, ss (Stage I)

  Cycle 1 (each cycle is 28 days) day 15、Cycle 2 (each cycle is 28 days) 、 Cycle 3 (each cycle is 28 days)、Cycle 4 (each cycle is 28 days)、、Cycle 5 (each cycle is 28 days)、Cycle 6 (each cycle is 28 days)

• Tmax, ss (Stage I)

  Cycle 1 (each cycle is 28 days) day 15、Cycle 2 (each cycle is 28 days) 、 Cycle 3 (each cycle is 28 days)、Cycle 4 (each cycle is 28 days)、、Cycle 5 (each cycle is 28 days)、Cycle 6 (each cycle is 28 days)

• Cmin, ss(Stage I)

  Cycle 1 (each cycle is 28 days) day 15、Cycle 2 (each cycle is 28 days) 、 Cycle 3 (each cycle is 28 days)、Cycle 4 (each cycle is 28 days)、、Cycle 5 (each cycle is 28 days)、Cycle 6 (each cycle is 28 days)

• AUCss (Stage I)

  Cycle 1 (each cycle is 28 days) day 15、Cycle 2 (each cycle is 28 days) 、 Cycle 3 (each cycle is 28 days)、Cycle 4 (each cycle is 28 days)、、Cycle 5 (each cycle is 28 days)、Cycle 6 (each cycle is 28 days)

• ORR (objective response rate) (Stage I)

  every 8 weeks lasting about one year

Study Arms (9)

Treatment group A: HRS-6209 in Combination with Fulvestrant

EXPERIMENTAL

Drug: HRS-6209 in Combination with Fulvestrant

Treatment group E: HRS-6209 in Combination with HRS-1358

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-1358

Treatment group B：HRS-6209 in Combination with Letrozole

EXPERIMENTAL

Drug: HRS-6209 in Combination with Letrozole

Treatment group C：HRS-6209 in Combination with HRS-8080

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-8080

Treatment group D：HRS-6209 in Combination with HRS-8080

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-8080

Treatment group F: HRS-6209 in Combination with HRS-1358

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-1358

Treatment group G：HRS-6209 in Combination with HRS-9813 and Letrozole

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-9813 and Letrozole

Treatment group H：HRS-6209 in Combination with HRS-9813 and HRS-8080

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-9813 and HRS-8080

Treatment group I：HRS-6209 in Combination with HRS-9813 and HRS-8080

EXPERIMENTAL

Drug: HRS-6209 in Combination with HRS-9813 and HRS-8080

Interventions

HRS-6209 in Combination with Letrozole DRUG

HRS-6209 in Combination with Letrozole

Treatment group B：HRS-6209 in Combination with Letrozole

HRS-6209 in Combination with HRS-8080 DRUG

HRS-6209 in Combination with HRS-8080

Treatment group C：HRS-6209 in Combination with HRS-8080; Treatment group D：HRS-6209 in Combination with HRS-8080

HRS-6209 in Combination with HRS-1358 DRUG

HRS-6209 in Combination with HRS-1358

Treatment group E: HRS-6209 in Combination with HRS-1358

HRS-6209 in Combination with Fulvestrant DRUG

HRS-6209 in Combination with Fulvestrant

Treatment group A: HRS-6209 in Combination with Fulvestrant

HRS-6209 in Combination with HRS-9813 and Letrozole DRUG

HRS-6209 in Combination with HRS-9813 and Letrozole

Treatment group G：HRS-6209 in Combination with HRS-9813 and Letrozole

HRS-6209 in Combination with HRS-9813 and HRS-8080 DRUG

HRS-6209 in Combination with HRS-9813 and HRS-8080

Treatment group H：HRS-6209 in Combination with HRS-9813 and HRS-8080; Treatment group I：HRS-6209 in Combination with HRS-9813 and HRS-8080

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: female
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Females aged 18-75 years (inclusive);
• ECOG performance status (PS) score of 0-1;
• Patients with histopathologically confirmed metastatic or unresectable locally advanced breast cancer;
• Patients with advanced malignant solid tumors confirmed by histopathology or cytopathology, who have failed standard treatment, or for whom no effective standard treatment regimen is available, or who are unable to receive further standard treatment.
• Menopausal status:
• Having had bilateral oophorectomy, or aged ≥ 60 years old; or
• Aged \< 60, natural menopause (defined as spontaneous cessation of regular menses for at least 12 consecutive months in the absence of other pathological or physiological causes) with E2 and FSH at postmenopausal levels; or
• Premenopausal or perimenopausal patients, agree to start or continue receive LHRH agonists during the study (exclude from the QT/QTc group).
• Disease progression evidenced by imaging during or after the last systemic anti-tumor treatment prior to the first dose (limited to the efficacy expansion stage);
• With at least one extracranial measurable target lesion at baseline per RECIST v1.1;
• Life expectancy of \> 3 months;
• Adequate organ and marrow function as defined by the protocol;Female subjects of childbearing potential should agree to adopt effective contraceptive measures during the study period and within 7months after the end of the study treatment; female subjects of childbearing potential must have a negative serum HCG test result within 7 days before enrollment in the study and must not be in the lactation;
• Voluntarily participate in this clinical study, be willing and able to comply with procedures related to clinical visits and study, and understand and have signed written informed consent.

You may not qualify if:

• With symptomatic visceral metastases deemed unfit for endocrine therapy by the investigator;
• With active brain metastases, carcinomatous meningitis, spinal cord compression, or a history of primary tumors of the central nervous system;
• History of clinically significant cardiovascular disease, including;
• Abnormal ECG findings, which are judged by the investigator to be clinically significant and and need to intervene;
• Previous use of fulvestrant for cohort of HRS-6209 in combination with fulvestrant (efficacy expansion stage).
• With factors that affect oral medication, active gastrointestinal diseases, or other diseases that may obviously affect drug absorption, distribution, metabolism, or excretion;
• With clinically significant endometrial abnormalities, including but not limited to endometrial hyperplasia and dysfunctional uterine bleeding;
• Active infection or unexplained fever \> 38.5 °C during the screening period or on the day of first dose;
• With uncontrollable chronic systemic complications as judged by the investigator.
• With active autoimmune diseases, history of immunodeficiency and history of autoimmune diseases, history of diseases or syndromes that require systemic corticosteroids or immunosuppressive drugs, other acquired (HIV infection) or congenital immunodeficiency, or history of organ transplantation (including allogeneic bone marrow transplantation);
• With acute infection or active tuberculosis requiring medication.
• With a known history of clinically significant liver disease, untreated active hepatitis;
• Had other concurrent malignant tumors in the past 5 years, except: 1. Cervical carcinoma in situ that has been cured, 2. Second primary cancer that has been cured without recurrence within five years;
• Use of moderate and strong CYP3A4 inhibitors within 1 week or moderate and strong CYP3A4 inducers within 2 weeks prior to the first dose;
• Use of any drugs with the risk of prolonging QT/QTc interval or causing torsade de pointes (TdP) within 4 weeks prior to the first dose, and with previous congenital QT interval prolongation syndrome or a family history of QT interval prolongation, implanted pacemakers or automatic implantable cardioverter defibrillators, uncorrectable electrolyte disorders, and other factors that may affect the QT/QTc study;

Sponsors & Collaborators

• Jiangsu HengRui Medicine Co., Ltd.: lead

Study Sites (1)

Fudan University Shanghai Cancer Center

Shanghai, Shanghai Municipality, 200032, China

RECRUITING

MeSH Terms

Conditions

Breast Neoplasms

Interventions

Fulvestrant; Letrozole

Condition Hierarchy (Ancestors)

Neoplasms by Site; Neoplasms; Breast Diseases; Skin Diseases; Skin and Connective Tissue Diseases

Intervention Hierarchy (Ancestors)

Estradiol; Estrenes; Estranes; Steroids; Fused-Ring Compounds; Polycyclic Compounds; Estradiol Congeners; Gonadal Steroid Hormones; Gonadal Hormones; Hormones; Hormones, Hormone Substitutes, and Hormone Antagonists; Nitriles; Organic Chemicals; Triazoles; Azoles; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds

Central Study Contacts

Xiaonan Sheng

CONTACT

+86 13524857678; xiaonan.sheng.xs6@hengrui.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 1, 2024
• First Posted: August 15, 2024
• Study Start: August 12, 2024
• Primary Completion (Estimated): December 1, 2027
• Study Completion (Estimated): August 1, 2028
• Last Updated: July 16, 2026

Record last verified: 2026-07

Locations

CN (1)