NeoTAILOR: ABiomarker-directed Approach to Guide Neoadjuvant Therapy for Patients With Stage II/III ER-positive, HER2-negative Breast Cancer

Phase 2

Recruiting

• Conditions: Breast Cancer; Cancer of the Breast
• Interventions: Device: VENTANA MIB-1 Ki67 assay; Device: Oncotype DX® Recurrence Score; Device: PAM50-based Prosigna breast cancer gene signature assay; Drug: Anastrozole; Drug: Combination anthracycline and/or taxane based treatment

• Registration Number: NCT05837455
• Lead Sponsor: Washington University School of Medicine

Brief Summary

This study aims to utilize a novel biomarker-driven approach to guide neoadjuvant treatment selection. It is the hypothesis that this will improve clinical response for postmenopausal women with clinical stage II/III ER-positive, HER2-negative breast cancer and identify those who may not require neoadjuvant chemotherapy, with a primary focus on outcomes in Black patients.

Detailed Description

Risk category is defined as follows:

* Low risk:

* Baseline Ki67 ≤ 10% (OR)

* Luminal A molecular intrinsic subtype by PAM50

* High risk:

* Non-Luminal A molecular intrinsic subtype by PAM50 (OR)

* In cases of non-diagnostic PAM50 molecular intrinsic subtype, patients will enroll in the high-risk group and undergo Week 4 tumor biopsy.

Study Timeline

• Study First Submitted: 2023-04-18
• Study First Submitted QC: 2023-04-18
• Study First Posted: 2023-05-01
• Study Start: 2024-05-30
• Status Verified: 2024-07
• Last Update Submitted: 2024-07-31
• Last Update Posted: 2024-08-02
• Primary Completion: 2027-11-30
• Study Completion: 2027-11-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: Female
• Target Recruitment: 81

Inclusion Criteria

• Histologically or cytologically confirmed newly diagnosed clinical stage II or III (by AJCC 8th edition - at least T2, any N, M0 or if N1+ then any T) ER-positive (ER > 10%), any PR, and HER2-negative breast cancer with complete surgical excision of the breast cancer after neoadjuvant therapy as the treatment goal.

  • HER2 negative must be assessed by FISH or IHC staining 0 or 1+ according to ASCO/CAP guidelines.

• Tumor size ≥2 cm in one dimension by clinical or radiographic examination (WHO criteria), if clinically axillary lymph node negative. Patients with histologically confirmed resectable locoregional nodal involvement may enroll regardless of tumor size. A palpable mass is not required as long as the mass is at least 2 cm in one dimension by radiographic exam.

• ECOG performance status 0 or 1.

• Eligible to receive neoadjuvant aromatase inhibitor, as per treating physician.

• Eligible to receive neoadjuvant standard of care anthracycline- and/or taxane-based chemotherapy regimen, as per treating physician.

• Able to tolerate breast MRI with intravenous contrast administration. Must be able to complete the applicable MRI screening evaluation form.

• Adequate bone marrow and organ function, as determined by the treating physician.

• Known history of hepatitis C virus (HCV) infection is permissible provided the patient has been treated and cured.

• At least 18 years of age.

• Postmenopausal status, defined as one of the following:

  • Age ≥ 60 years
  • Age < 60 with intact uterus and amenorrhea for 12 consecutive months or more
  • Status post bilateral oophorectomy, total hysterectomy

• Ability to understand and willingness to sign an IRB approved written informed consent document (or that of legally authorized representative, if applicable), and willing and able to comply with scheduled visits and treatment schedule.

Exclusion Criteria

• Inflammatory breast cancer (cT4d disease as per AJCC 8th edition).

• Locally recurrent or metastatic disease (cM1 disease as per AJCC 8th edition).

• Bilateral breast cancer.

• Prior systemic therapy for the indexed breast cancer.

• Pre-existing Grade ≥2 neuropathy.

• Uncontrolled intercurrent illness that would limit compliance with study requirements.

• A history of other malignancy ≤5 years prior to the indexed breast cancer diagnosis with the exception of basal cell or squamous cell carcinoma of the skin which were treated with local resection only or adequately treated carcinoma in situ of the cervix.

• Concurrent participation in any investigational therapeutic trial for treatment of breast cancer.

• Contraindication to breast MRI, such as:

  • Prior allergic reaction to gadolinium-based MR contrast agents.
  • Renal insufficiency (glomerular filtration rate (GFR) < 30 mL/min/1.73 m^2) measured within the past 60 days which precludes safe administration of the contrast agent.

• Known HIV positivity that in the judgement of the treating physician would impact safety of chemotherapy receipt.

• A history of allergic reactions attributed to compounds of similar chemical or biologic composition to anastrozole, taxanes (paclitaxel or nab-paclitaxel), anthracyclines (doxorubicin or epirubicin) or cyclophosphamide.

• Evidence of uncontrolled ongoing or active infection, requiring parenteral anti-bacterial, anti-viral, or anti-fungal therapy ≤ 7 days prior to administration of study treatment. Patients receiving prophylactic antibiotics (e.g., for prevention of a urinary tract infection or chronic obstructive pulmonary disease) are eligible.

• Any uncontrolled medical condition that in the opinion of the Investigator would pose a risk to participant safety or interfere with study participation or interpretation of individual participant results.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Low-risk group	VENTANA MIB-1 Ki67 assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw for research purposes at Week 4 (no breast tumor biopsy at this time point) and continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
Low-risk group	Oncotype DX® Recurrence Score	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw for research purposes at Week 4 (no breast tumor biopsy at this time point) and continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
Low-risk group	PAM50-based Prosigna breast cancer gene signature assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw for research purposes at Week 4 (no breast tumor biopsy at this time point) and continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
Low-risk group	Anastrozole	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw for research purposes at Week 4 (no breast tumor biopsy at this time point) and continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-sensitive group	VENTANA MIB-1 Ki67 assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 ≤10% (the high-risk endocrine-sensitive group) will continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-sensitive group	Oncotype DX® Recurrence Score	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 ≤10% (the high-risk endocrine-sensitive group) will continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-sensitive group	PAM50-based Prosigna breast cancer gene signature assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 ≤10% (the high-risk endocrine-sensitive group) will continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-resistant group	VENTANA MIB-1 Ki67 assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 \>10% (the high-risk endocrine-resistant group) will receive escalated therapy with \~5-6 additional months of standard of care chemotherapy (combination anthracycline- and/or taxane-based at the discretion of their physician). * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-resistant group	Oncotype DX® Recurrence Score	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 \>10% (the high-risk endocrine-resistant group) will receive escalated therapy with \~5-6 additional months of standard of care chemotherapy (combination anthracycline- and/or taxane-based at the discretion of their physician). * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-resistant group	PAM50-based Prosigna breast cancer gene signature assay	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 \>10% (the high-risk endocrine-resistant group) will receive escalated therapy with \~5-6 additional months of standard of care chemotherapy (combination anthracycline- and/or taxane-based at the discretion of their physician). * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-resistant group	Combination anthracycline and/or taxane based treatment	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 \>10% (the high-risk endocrine-resistant group) will receive escalated therapy with \~5-6 additional months of standard of care chemotherapy (combination anthracycline- and/or taxane-based at the discretion of their physician). * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.
High-risk endocrine-sensitive group	Anastrozole	* Baseline breast MRI and research specimen collection prior to the start of treatment with standard of care anastrozole. All patients will have one 28-day cycle of anastrozole, followed by determination of breast cancer risk category by incorporating results from baseline Ki67, Oncotype DX RS, and molecular intrinsic subtype by PAM50. * An additional blood draw and breast tumor tissue collection at Week 4 to assess Ki67. Patients with Week 4 Ki67 ≤10% (the high-risk endocrine-sensitive group) will continue to receive 5 additional 28-day cycles of anastrozole. * After completion of \~6 months of neoadjuvant treatment, will undergo post-treatment breast MRI followed by standard of care surgery.

Primary Outcome Measures

Name	Time	Method
Objective response rate (ORR) by breast MRI in the combined low-risk plus high-risk endocrine-sensitive groups (pooled endocrine therapy-responders)	Through completion of treatment (estimated to be 6 months)	* ORR is defined as patients achieving clinical complete response (CR) or partial response (PR) according to RECIST v1.1.; * Complete Response (CR): disappearance of all target and non-target lesions. Residual lesions thought to be non-malignant should be further investigated before CR can be accepted.; * Partial Response (PR): ≥30% decrease in the sum of measures of target lesions, taking as reference the baseline sum of diameters. Non-target lesions must be non-PD.

Secondary Outcome Measures

Name	Time	Method
Breast conservation surgery (BCS) conversion rate by cohort and treatment assignment	Through completion of surgery (estimated to be 6 months)
Objective response rate (ORR) by breast MRI in the high-risk endocrine-sensitive group	Through completion of treatment (estimated to be 6 months)	* ORR is defined as patients achieving clinical complete response (CR) or partial response (PR) according to modified RECIST v1.1.; * Complete Response (CR): disappearance of all target and non-target lesions. Residual lesions thought to be non-malignant should be further investigated before CR can be accepted.; * Partial Response (PR): ≥30% decrease in the sum of measures of target lesions, taking as reference the baseline sum of diameters. Non-target lesions must be non-PD.
Proportion of patients who will require oncoplastic breast reduction surgery before and after neoadjuvant treatment	Through completion of surgery (estimated to be 6 months)
Objective response rate (ORR) by breast MRI in the high-risk endocrine-resistant group (high risk patients with week 4 Ki67 > 10% post anastrozole)	Through completion of treatment (estimated to be 6 months)	* ORR is defined as patients achieving clinical complete response (CR) or partial response (PR) according to modified RECIST v1.1.; * Complete Response (CR): disappearance of all target and non-target lesions. Residual lesions thought to be non-malignant should be further investigated before CR can be accepted.; * Partial Response (PR): ≥30% decrease in the sum of measures of target lesions, taking as reference the baseline sum of diameters. Non-target lesions must be non-PD.

Trial Locations

Locations (1)

Washington University School of Medicine; 🇺🇸 Saint Louis, Missouri, United States