Endocrine Response in Women With Invasive Lobular Breast Cancer

  • STATUS
    Recruiting
  • End date
    Feb 5, 2022
  • participants needed
    170
  • sponsor
    Priscilla McAuliffe
Updated on 5 February 2021
estrogen
carcinoma
endocrine therapy
hormone therapy
HER2
lobular carcinoma
adjuvant therapy
tamoxifen
fulvestrant
erbb2
aromatase inhibitor
anastrozole
immunostimulant
mammogram
ductal carcinoma
core needle biopsy
ki-67

Summary

RATIONALE: Currently, adjuvant endocrine therapy often follows a "one-size-fits- all" approach, with most premenopausal women receiving tamoxifen, and most postmenopausal receiving aromatase inhibitor therapy. In current clinical practice, patients with invasive lobular carcinoma are treated no differently than patients with invasive ductal carcinoma based on the void of information specific to patients with this tumor type. Identification of a biological signal of tamoxifen and/or AI-resistance and/or fulvestrant-sensitivity in ILC patients would have dramatic implications for the future management of this breast cancer subtype.

PURPOSE: To study whether fulvestrant is more effective than anastrozole or tamoxifen in reducing Ki67 in ILC and whether that Ki67 reduction will correlate with alterations in expression of ER and ER-regulated genes. Differential Ki67 effect in this study will serve as a surrogate for outcome of ILC patients on endocrine therapy.

Primary Objective:

To determine the change from baseline to post-treatment Ki67 values in ER-positive, HER2-negative ILC tissue derived from postmenopausal women awaiting definitive surgery or further neoadjuvant treatment who are randomized to 21-24 days of neoadjuvant endocrine treatments with fulvestrant (two 250 mg IM injections given on day 1), anastrozole (1mg given orally daily), or tamoxifen (20mg given orally daily).

Description

OBJECTIVES

Primary

To determine the change from baseline to post-treatment Ki67 values in ER-positive, HER2-negative ILC tissue derived from postmenopausal women awaiting definitive surgery or further neoadjuvant treatment who are randomized to 21-24 days of neoadjuvant endocrine treatments with fulvestrant (two 250 mg IM injections given on day 1), anastrozole (1mg given orally daily), or tamoxifen (20mg given orally daily).

Secondary

  • To evaluate ER protein expression in ILC tissues at baseline and following neoadjuvant endocrine therapy.
  • To evaluate PR protein expression in ILC tissues at baseline and following neo-adjuvant endocrine therapy.
  • To evaluate ER-related and ILC-specific candidate gene mRNA expression in ILC tissues at baseline and following neoadjuvant endocrine therapy in an effort to identify biomarkers of endocrine response and putative drivers of endocrine resistance in ILC.
  • To evaluate associations between changes in Ki67 in ILC tissues following neoadjuvant endocrine therapy with ER and PR protein expression, or ER and candidate gene mRNA expression at baseline and post-treatment.

Exploratory

  • To evaluate DNA methylation in ILC tissues at baseline and following neo-adjuvant endocrine therapy.
  • To evaluate associations between germline and somatic DNA sequence variants with changes in Ki67 in ILC tissues following neo-adjuvant endocrine therapy.
  • To evaluate the activity of signaling pathways in ILC tissues by immunohistochemical or other protein analyses, such as histone modifications, at baseline and following neo-adjuvant endocrine therapy.

Details
Condition Breast Cancer, Breast Cancer Diagnosis, breast carcinoma, cancer, breast
Treatment tamoxifen, anastrozole, fulvestrant
Clinical Study IdentifierNCT02206984
SponsorPriscilla McAuliffe
Last Modified on5 February 2021

Eligibility

Yes No Not Sure

Inclusion Criteria

Are you female?
Do you have Breast Cancer?
Do you have any of these conditions: Breast Cancer or cancer, breast or Breast Cancer Diagnosis or breast carcinoma?
Do you have any of these conditions: breast carcinoma or cancer, breast or Breast Cancer or Breast Cancer Diagnosis?
Histologically confirmed invasive lobular breast cancer, that is hormone receptor-positive and HER2-negative, measuring at least 1 centimeter (cm) radiographically or clinically, clinical stages I-III. Invasive lobular histology will be diagnosed at the enrolling institution for purposes of study participation. Subsequently, invasive lobular histology will be confirmed by central pathology review, but this central review will not be required prior to patient enrollment
Prior to initiation of study agents, study participants will be highly encouraged to undergo a baseline research core biopsy of their breast tumor. If this is not possible or the patient refuses, the pre-treatment tumor sample must be obtained from their archival diagnostic core biopsy. If definitive surgery is not performed at day 21-27 after study treatment, a second post-treatment research core biopsy will need to be obtained from their breast tumor. For patients undergoing surgery, the second biopsy will be removed from the breast tumor tissue excised during their operation. Note: In the event that the baseline breast tumor biopsy performed for research purposes does not yield adequate tumor tissue for analysis of the primary and secondary endpoints, tissue will be requested from the patient's archival clinical diagnostic core biopsy if it is available.The patient will still remain on study and complete protocol therapy as planned in this unlikely event
Hormone receptor (HR) status of the invasive component must be documented before trial enrollment. The tumor must be HR-positive. HR will be considered positive if staining is 1% or greater for ER and/or PR. This will be determined at the enrolling institution for purposes of study participation and enrollment onto the trial. Subsequently, HR status will be confirmed by central pathology review, but this central review will not be required prior to enrolling the patient. HER2 status will be determined locally only, based upon current ASCO/CAP guidelines
Patients must be female
Participants must be fully postmenopausal
ECOG performance status of 0, 1 or 2
Adequate organ and marrow function as defined by a history and physical exam that rules out comorbidities that would be exclusions to participation in the study (see exclusion criteria) and clinical laboratory parameters as deemed clinically appropriate by the treating physician
Prior use of hormone contraceptives and replacement therapy is allowed (e.g., estrogen and/or progestin), but must have been discontinued at least 30 days prior to the study enrollment. Vaginal preparations (e.g., Vagifem or Estring)
Participant must be aware of the nature of her malignancy, understand the study requirements and risks and be able and willing to sign a written informed consent document

Exclusion Criteria

Prior or concurrent use of hormonal therapy, chemotherapy, radiation therapy, or novel therapy to treat the current breast cancer, including any history of prior irradiation to the ipsilateral breast. Additionally, the patient must not have had hormonal therapy for breast cancer treatment or for breast cancer prevention within 2 years prior to study enrollment. (Note: Synchronous breast, cancer (including bilateral breast cancer) at separate sites is permissible, provided the patient does not receive medical treatments for breast cancer or radiation therapy to the ipsilateral breast during the 21 day study intervention period
Concurrent use of any other investigational agents
History of allergic reactions/hypersensitivity attributed to compounds of similar chemical or biologic composition to tamoxifen, anastrozole, or fulvestrant or any of their ingredients
History of thromboembolic disease or uterine cancer that is considered a contraindication to tamoxifen
Active hepatitis viral infections or a known history of liver disease, especially moderate (Child-Pugh Class B) to severe (Child-Pugh Class C) hepatic impairment
Uncontrolled current illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
HER-2 positivity
Increased Risk of bleeding: including a history of a bleeding diathesis and/or known history of severe thrombocytopenia. NOTE: Anticoagulant use is not a contraindication to fulvestrant, but caution is advised in administration in patients on anticoagulation. Patients on anticoagulation who will receive fulvestrant will have PT and aPTT/INR assessed at baseline
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