Study of XL147 (SAR245408) or XL765 (SAR245409) in Combination With Letrozole in Subjects With Breast Cancer

NCT01082068 | Completed Phase 1 DMC

• 2 other identifiers: ARD11437XL147-202
• Study Type: interventional
• Target: 72
• Locations: 3 countries
• Sites: 17

Brief Summary

Phase 1 of this study will evaluate the maximum tolerated dose (MTD) of XL147 when given in combination with letrozole (Femara) and of XL765 when given in combination with letrozole. After the MTD is established for each combination (Phase 2), subjects will be enrolled to evaluate the preliminary efficacy and safety of these combinations in subjects with breast cancer refractory to a non-steroidal aromatase inhibitor that is ER+/PGR+ and HER2-. Letrozole is used in the treatment of different types of breast cancer, but patients can develop resistance. Upregulation of PI3K activity is one of the most common characteristics of human cancer cells, including breast tumor cells. Activation of PI3K results in stimulation of AKT and mTOR kinases, resulting in the promotion of tumor cell proliferation and survival. Preclinical and retrospective clinical data suggest that aberrant activation of the PI3K pathway may play a role in aromatase inhibitor resistance in patients with ER+, HER2- breast cancer. XL147 is a potent inhibitor of PI3K, and XL765 is a potent dual inhibitor of PI3K and mTOR; therefore either of these compounds in combination with letrozole warrants clinical investigation.

Conditions

Breast Cancer

Keywords

HER2 negative; Hormone Receptor Positive; Breast Neoplasms

Outcome Measures

Primary Outcomes (3)

• Safety and tolerability of XL147 and letrozole and XL765 and letrozole

  at weekly and bi-weekly study visits

• In Phase 1, to determine the maximum tolerated dose of XL147 in combination with letrozole and of XL765 in combination with letrozole

  assessed by weekly study visits

• In Phase 2, to evaluate progression-free survival at 3 months

  tumor assessments at Week 13 and every 8 weeks thereafter

Secondary Outcomes (2)

• In Phase 2, to assess other clinical benefit and efficacy parameters

  tumor assessments at Week 13 and every 8 weeks thereafter

• Pharmacokinetics and pharmacodynamics of XL147, XL765 and letrozole

  assessed every 2 weeks, then every 4 weeks

Study Arms (2)

Arm 1

EXPERIMENTAL

XL147 (SAR245408) + letrozole

Drug: XL147 (SAR245408); Drug: letrozole (Femara)

Arm 2

EXPERIMENTAL

XL765 + letrozole

Drug: XL765 (SAR245409); Drug: letrozole (Femara)

Interventions

XL147 (SAR245408) DRUG

given orally once daily as tablets

Arm 1

XL765 (SAR245409) DRUG

given orally twice daily as capsules

Arm 2

letrozole (Femara) DRUG

given orally once daily as tablets

Arm 1; Arm 2

Eligibility Criteria

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

You may qualify if:

• The subject has histologically confirmed breast cancer that is ER+ and/or PGR+.
• The subject's breast cancer is negative for HER2.
• The subject has recurrent or metastatic breast cancer that is refractory to a nonsteroidal aromatase inhibitor and has either disease progression or disease recurrence.
• Subjects previously treated with letrozole must be able to tolerate the approved dose and schedule of letrozole.
• For subjects enrolled in Phase 2, either archival tumor samples must be available, or the subject must be willing to undergo a fresh biopsy.
• In Phase 2, at least 30 subjects in each arm must have measurable disease
• The subject is a postmenopausal female.
• If a subject is currently receiving bisphosphonates, the subject must have received the bisphosphonates for at least 2 months before starting study treatment.
• The subject has an Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 1.
• The subject has adequate organ and marrow function.
• The subject has no other diagnosis of malignancy or evidence of other malignancy for 2 years before screening for this study (except non-melanoma skin cancer or in situ carcinoma of the cervix).
• The subject is capable of understanding and complying with the protocol requirements and has signed the informed consent document.

You may not qualify if:

• The subject has received prior treatment with a selective inhibitor of PI3K, AKT, and/or mTOR.
• Certain restrictions on prior therapies apply.
• The subject has not recovered from toxicity due to prior therapy to Grade ≤ 1 or to pre-therapy baseline.
• The subject has untreated, symptomatic, or progressive brain metastases.
• The subject has only non-measurable lesions, other than bone, skin, or chest wall metastasis
• The subject has to start cytotoxic chemotherapy due to rapid progressive disease involving major organs.
• The subject has prothrombin time/ International Normalized Ratio (PT/ INR) or partial thromboplastin time (PTT) test results at screening that are above 1.3 x the laboratory upper limit of normal.
• The subject has uncontrolled significant intercurrent illness.
• The subject has a baseline corrected QT interval (QTc) \> 470 ms.
• The subject has a diagnosis of uncontrolled diabetes mellitus.
• The subject is known to be positive for the human immunodeficiency virus (HIV).
• The subject has a previously identified allergy or hypersensitivity to components of the study treatment formulation(s).
• The subject is unable or unwilling to abide by the study protocol or cooperate fully with the investigator or designee.

Sponsors & Collaborators

• Sanofi: lead

Study Sites (17)

Investigational Site Number 1537

Los Angeles, California, 90033, United States

Location

Investigational Site Number 1601

Denver, Colorado, 80262, United States

Location

Investigational Site Number 1238

Fort Meyers, Florida, 33901, United States

Location

Investigational Site Number 1441

Chicago, Illinois, 60611, United States

Location

Investigational Site Number 1138

Boston, Massachusetts, 02115, United States

Location

Investigational Site Number 1331

Ann Arbor, Michigan, 48109, United States

Location

Investigational Site Number 1330

Detroit, Michigan, 48201, United States

Location

Investigational Site Number 5201

Columbia, Missouri, 65201, United States

Location

Investigational Site Number 1252

Durham, North Carolina, 27710, United States

Location

Investigational Site Number 1214

Nashville, Tennessee, 37203, United States

Location

Investigational Site Number 5246

El Paso, Texas, 79915, United States

Location

Investigational Site Number 3321

Nantes Saint Herblain, 44805, France

Location

Investigational Site Number 3324

Paris, 75231, France

Location

Investigational Site Number 3415

Barcelona, 08035, Spain

Location

Investigational Site Number 3419

Barcelona, 08036, Spain

Location

Investigational Site Number 3413

Madrid, 28041, Spain

Location

Investigational Site Number 3420

Madrid, 28050, Spain

Location

MeSH Terms

Conditions

Breast Neoplasms

Interventions

XL147; XL765; Letrozole

Condition Hierarchy (Ancestors)

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

Intervention Hierarchy (Ancestors)

Nitriles; Organic Chemicals; Triazoles; Azoles; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds

Study Officials

• Clinical Sciences & Operations

  Sanofi

  STUDY DIRECTOR

Study Design

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

Study Record Dates

• First Submitted: March 4, 2010
• First Posted: March 8, 2010
• Study Start: June 1, 2010
• Primary Completion: April 1, 2013
• Study Completion: April 1, 2013
• Last Updated: June 3, 2016

Record last verified: 2016-05

Locations

ES (4); US (11); FR (2)