H (Trastuzumab or Biosimilar) Combined With CDK4/6 Inhibitor + AI±OFS in the Treatment of HR+HER2+ Advanced Breast Cancer Efficacy and Safety: a Chinese Multi-center Real World Study
Advanced HR+ HER2 Negative Breast Carcinoma
About this trial
This is an interventional treatment trial for Advanced HR+ HER2 Negative Breast Carcinoma
Eligibility Criteria
Inclusion Criteria:
- Age ≥ 18 years old.
HR-positive and HER2-positive breast cancer diagnosed pathologically.
- ER positive and/or PR positive is defined as: the proportion of positively stained tumor cells in all tumor cells is ≥10% (reviewed and confirmed by the investigator at the test center);
- HER2 positive is defined as: standard immunohistochemistry (IHC) test for HER2 (3+), or HER2 (2+), FISH test is positive (reviewed and confirmed by the investigator at the test center).
- After H-based combined chemotherapy treatment has progressed (≤1 line), or the combined treatment is effective but not suitable for continued combined chemotherapy; or initially unsuitable for targeted combined chemotherapy for recurrent metastatic breast cancer or inoperable locally advanced breast cancer Breast cancer patients.
- Postmenopausal or premenopausal/perimenopausal female patients can be included in the group. Premenopausal or perimenopausal female patients must be willing to receive LHRHa treatment during the study period.
- According to the RECIST 1.1 standard, patients can have: a) measurable lesions; b) without measurable lesions, unmeasurable osteolytic or mixed (osteolytic + osteogenic) bone lesions. c) Unmeasurable lesions.
The main organs are functioning normally, that is, they meet the following standards:
The standard of routine blood examination should meet:
Hb≥80 g/L; ANC≥1.5×109 /L; PLT≥75×109 /L;
The biochemical inspection shall meet the following standards:
TBIL≤1.5×ULN (upper limit of normal value); ALT and AST≤2.5×ULN; if there is liver metastasis, ALT and AST≤5×ULN; Serum creatinine ≤1.5×ULN, creatinine clearance ≥50ml/min (based on Cockroft and Gault formula);
- Heart color Doppler ultrasound Left ventricular ejection fraction (LVEF) ≥50%.
Exclusion Criteria:
- Patients who have previously received CDK4/6 inhibitor drug therapy.
- T-DM1 treats patients.
- Female patients during pregnancy or lactation.
- Suffer from serious concomitant diseases, such as infectious diseases; there are many factors that affect the oral and absorption of drugs.
- Patients considered by the investigator to be unsuitable to participate in this study.
Sites / Locations
- Tianjin Cancer HospitalRecruiting
Arms of the Study
Arm 1
Experimental
Trastuzumab injection+Piperacillil tablets+Letrozole tablets
Trastuzumab injection:Once in 21 days IVD;Piperacillil tablets:125mg qd (d1-21) PO;Letrozole tablets:2.5mg POqd;According to the current clinical guidelines combined with clinical practice, the treating physicians recommended the treatment plan to the subjects, and decided to enroll HR+/HER2+ advanced breast cancer patients treated with H combined with CDK4/6 inhibitor + AI±OFS into this study